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  /***/ "./node_modules/axios/index.js":
  /*!*************************************!*\
    !*** ./node_modules/axios/index.js ***!
    \*************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  module.exports = __webpack_require__(/*! ./lib/axios */ "./node_modules/axios/lib/axios.js");
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/adapters/xhr.js":
  /*!************************************************!*\
    !*** ./node_modules/axios/lib/adapters/xhr.js ***!
    \************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  var settle = __webpack_require__(/*! ./../core/settle */ "./node_modules/axios/lib/core/settle.js");
  var buildURL = __webpack_require__(/*! ./../helpers/buildURL */ "./node_modules/axios/lib/helpers/buildURL.js");
  var parseHeaders = __webpack_require__(/*! ./../helpers/parseHeaders */ "./node_modules/axios/lib/helpers/parseHeaders.js");
  var isURLSameOrigin = __webpack_require__(/*! ./../helpers/isURLSameOrigin */ "./node_modules/axios/lib/helpers/isURLSameOrigin.js");
  var createError = __webpack_require__(/*! ../core/createError */ "./node_modules/axios/lib/core/createError.js");
  var btoa = (typeof window !== 'undefined' && window.btoa && window.btoa.bind(window)) || __webpack_require__(/*! ./../helpers/btoa */ "./node_modules/axios/lib/helpers/btoa.js");
  
  module.exports = function xhrAdapter(config) {
    return new Promise(function dispatchXhrRequest(resolve, reject) {
      var requestData = config.data;
      var requestHeaders = config.headers;
  
      if (utils.isFormData(requestData)) {
        delete requestHeaders['Content-Type']; // Let the browser set it
      }
  
      var request = new XMLHttpRequest();
      var loadEvent = 'onreadystatechange';
      var xDomain = false;
  
      // For IE 8/9 CORS support
      // Only supports POST and GET calls and doesn't returns the response headers.
      // DON'T do this for testing b/c XMLHttpRequest is mocked, not XDomainRequest.
      if ( true &&
          typeof window !== 'undefined' &&
          window.XDomainRequest && !('withCredentials' in request) &&
          !isURLSameOrigin(config.url)) {
        request = new window.XDomainRequest();
        loadEvent = 'onload';
        xDomain = true;
        request.onprogress = function handleProgress() {};
        request.ontimeout = function handleTimeout() {};
      }
  
      // HTTP basic authentication
      if (config.auth) {
        var username = config.auth.username || '';
        var password = config.auth.password || '';
        requestHeaders.Authorization = 'Basic ' + btoa(username + ':' + password);
      }
  
      request.open(config.method.toUpperCase(), buildURL(config.url, config.params, config.paramsSerializer), true);
  
      // Set the request timeout in MS
      request.timeout = config.timeout;
  
      // Listen for ready state
      request[loadEvent] = function handleLoad() {
        if (!request || (request.readyState !== 4 && !xDomain)) {
          return;
        }
  
        // The request errored out and we didn't get a response, this will be
        // handled by onerror instead
        // With one exception: request that using file: protocol, most browsers
        // will return status as 0 even though it's a successful request
        if (request.status === 0 && !(request.responseURL && request.responseURL.indexOf('file:') === 0)) {
          return;
        }
  
        // Prepare the response
        var responseHeaders = 'getAllResponseHeaders' in request ? parseHeaders(request.getAllResponseHeaders()) : null;
        var responseData = !config.responseType || config.responseType === 'text' ? request.responseText : request.response;
        var response = {
          data: responseData,
          // IE sends 1223 instead of 204 (https://github.com/axios/axios/issues/201)
          status: request.status === 1223 ? 204 : request.status,
          statusText: request.status === 1223 ? 'No Content' : request.statusText,
          headers: responseHeaders,
          config: config,
          request: request
        };
  
        settle(resolve, reject, response);
  
        // Clean up request
        request = null;
      };
  
      // Handle low level network errors
      request.onerror = function handleError() {
        // Real errors are hidden from us by the browser
        // onerror should only fire if it's a network error
        reject(createError('Network Error', config, null, request));
  
        // Clean up request
        request = null;
      };
  
      // Handle timeout
      request.ontimeout = function handleTimeout() {
        reject(createError('timeout of ' + config.timeout + 'ms exceeded', config, 'ECONNABORTED',
          request));
  
        // Clean up request
        request = null;
      };
  
      // Add xsrf header
      // This is only done if running in a standard browser environment.
      // Specifically not if we're in a web worker, or react-native.
      if (utils.isStandardBrowserEnv()) {
        var cookies = __webpack_require__(/*! ./../helpers/cookies */ "./node_modules/axios/lib/helpers/cookies.js");
  
        // Add xsrf header
        var xsrfValue = (config.withCredentials || isURLSameOrigin(config.url)) && config.xsrfCookieName ?
            cookies.read(config.xsrfCookieName) :
            undefined;
  
        if (xsrfValue) {
          requestHeaders[config.xsrfHeaderName] = xsrfValue;
        }
      }
  
      // Add headers to the request
      if ('setRequestHeader' in request) {
        utils.forEach(requestHeaders, function setRequestHeader(val, key) {
          if (typeof requestData === 'undefined' && key.toLowerCase() === 'content-type') {
            // Remove Content-Type if data is undefined
            delete requestHeaders[key];
          } else {
            // Otherwise add header to the request
            request.setRequestHeader(key, val);
          }
        });
      }
  
      // Add withCredentials to request if needed
      if (config.withCredentials) {
        request.withCredentials = true;
      }
  
      // Add responseType to request if needed
      if (config.responseType) {
        try {
          request.responseType = config.responseType;
        } catch (e) {
          // Expected DOMException thrown by browsers not compatible XMLHttpRequest Level 2.
          // But, this can be suppressed for 'json' type as it can be parsed by default 'transformResponse' function.
          if (config.responseType !== 'json') {
            throw e;
          }
        }
      }
  
      // Handle progress if needed
      if (typeof config.onDownloadProgress === 'function') {
        request.addEventListener('progress', config.onDownloadProgress);
      }
  
      // Not all browsers support upload events
      if (typeof config.onUploadProgress === 'function' && request.upload) {
        request.upload.addEventListener('progress', config.onUploadProgress);
      }
  
      if (config.cancelToken) {
        // Handle cancellation
        config.cancelToken.promise.then(function onCanceled(cancel) {
          if (!request) {
            return;
          }
  
          request.abort();
          reject(cancel);
          // Clean up request
          request = null;
        });
      }
  
      if (requestData === undefined) {
        requestData = null;
      }
  
      // Send the request
      request.send(requestData);
    });
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/axios.js":
  /*!*****************************************!*\
    !*** ./node_modules/axios/lib/axios.js ***!
    \*****************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./utils */ "./node_modules/axios/lib/utils.js");
  var bind = __webpack_require__(/*! ./helpers/bind */ "./node_modules/axios/lib/helpers/bind.js");
  var Axios = __webpack_require__(/*! ./core/Axios */ "./node_modules/axios/lib/core/Axios.js");
  var defaults = __webpack_require__(/*! ./defaults */ "./node_modules/axios/lib/defaults.js");
  
  /**
   * Create an instance of Axios
   *
   * @param {Object} defaultConfig The default config for the instance
   * @return {Axios} A new instance of Axios
   */
  function createInstance(defaultConfig) {
    var context = new Axios(defaultConfig);
    var instance = bind(Axios.prototype.request, context);
  
    // Copy axios.prototype to instance
    utils.extend(instance, Axios.prototype, context);
  
    // Copy context to instance
    utils.extend(instance, context);
  
    return instance;
  }
  
  // Create the default instance to be exported
  var axios = createInstance(defaults);
  
  // Expose Axios class to allow class inheritance
  axios.Axios = Axios;
  
  // Factory for creating new instances
  axios.create = function create(instanceConfig) {
    return createInstance(utils.merge(defaults, instanceConfig));
  };
  
  // Expose Cancel & CancelToken
  axios.Cancel = __webpack_require__(/*! ./cancel/Cancel */ "./node_modules/axios/lib/cancel/Cancel.js");
  axios.CancelToken = __webpack_require__(/*! ./cancel/CancelToken */ "./node_modules/axios/lib/cancel/CancelToken.js");
  axios.isCancel = __webpack_require__(/*! ./cancel/isCancel */ "./node_modules/axios/lib/cancel/isCancel.js");
  
  // Expose all/spread
  axios.all = function all(promises) {
    return Promise.all(promises);
  };
  axios.spread = __webpack_require__(/*! ./helpers/spread */ "./node_modules/axios/lib/helpers/spread.js");
  
  module.exports = axios;
  
  // Allow use of default import syntax in TypeScript
  module.exports.default = axios;
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/cancel/Cancel.js":
  /*!*************************************************!*\
    !*** ./node_modules/axios/lib/cancel/Cancel.js ***!
    \*************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  /**
   * A `Cancel` is an object that is thrown when an operation is canceled.
   *
   * @class
   * @param {string=} message The message.
   */
  function Cancel(message) {
    this.message = message;
  }
  
  Cancel.prototype.toString = function toString() {
    return 'Cancel' + (this.message ? ': ' + this.message : '');
  };
  
  Cancel.prototype.__CANCEL__ = true;
  
  module.exports = Cancel;
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/cancel/CancelToken.js":
  /*!******************************************************!*\
    !*** ./node_modules/axios/lib/cancel/CancelToken.js ***!
    \******************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var Cancel = __webpack_require__(/*! ./Cancel */ "./node_modules/axios/lib/cancel/Cancel.js");
  
  /**
   * A `CancelToken` is an object that can be used to request cancellation of an operation.
   *
   * @class
   * @param {Function} executor The executor function.
   */
  function CancelToken(executor) {
    if (typeof executor !== 'function') {
      throw new TypeError('executor must be a function.');
    }
  
    var resolvePromise;
    this.promise = new Promise(function promiseExecutor(resolve) {
      resolvePromise = resolve;
    });
  
    var token = this;
    executor(function cancel(message) {
      if (token.reason) {
        // Cancellation has already been requested
        return;
      }
  
      token.reason = new Cancel(message);
      resolvePromise(token.reason);
    });
  }
  
  /**
   * Throws a `Cancel` if cancellation has been requested.
   */
  CancelToken.prototype.throwIfRequested = function throwIfRequested() {
    if (this.reason) {
      throw this.reason;
    }
  };
  
  /**
   * Returns an object that contains a new `CancelToken` and a function that, when called,
   * cancels the `CancelToken`.
   */
  CancelToken.source = function source() {
    var cancel;
    var token = new CancelToken(function executor(c) {
      cancel = c;
    });
    return {
      token: token,
      cancel: cancel
    };
  };
  
  module.exports = CancelToken;
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/cancel/isCancel.js":
  /*!***************************************************!*\
    !*** ./node_modules/axios/lib/cancel/isCancel.js ***!
    \***************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  module.exports = function isCancel(value) {
    return !!(value && value.__CANCEL__);
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/core/Axios.js":
  /*!**********************************************!*\
    !*** ./node_modules/axios/lib/core/Axios.js ***!
    \**********************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var defaults = __webpack_require__(/*! ./../defaults */ "./node_modules/axios/lib/defaults.js");
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  var InterceptorManager = __webpack_require__(/*! ./InterceptorManager */ "./node_modules/axios/lib/core/InterceptorManager.js");
  var dispatchRequest = __webpack_require__(/*! ./dispatchRequest */ "./node_modules/axios/lib/core/dispatchRequest.js");
  
  /**
   * Create a new instance of Axios
   *
   * @param {Object} instanceConfig The default config for the instance
   */
  function Axios(instanceConfig) {
    this.defaults = instanceConfig;
    this.interceptors = {
      request: new InterceptorManager(),
      response: new InterceptorManager()
    };
  }
  
  /**
   * Dispatch a request
   *
   * @param {Object} config The config specific for this request (merged with this.defaults)
   */
  Axios.prototype.request = function request(config) {
    /*eslint no-param-reassign:0*/
    // Allow for axios('example/url'[, config]) a la fetch API
    if (typeof config === 'string') {
      config = utils.merge({
        url: arguments[0]
      }, arguments[1]);
    }
  
    config = utils.merge(defaults, {method: 'get'}, this.defaults, config);
    config.method = config.method.toLowerCase();
  
    // Hook up interceptors middleware
    var chain = [dispatchRequest, undefined];
    var promise = Promise.resolve(config);
  
    this.interceptors.request.forEach(function unshiftRequestInterceptors(interceptor) {
      chain.unshift(interceptor.fulfilled, interceptor.rejected);
    });
  
    this.interceptors.response.forEach(function pushResponseInterceptors(interceptor) {
      chain.push(interceptor.fulfilled, interceptor.rejected);
    });
  
    while (chain.length) {
      promise = promise.then(chain.shift(), chain.shift());
    }
  
    return promise;
  };
  
  // Provide aliases for supported request methods
  utils.forEach(['delete', 'get', 'head', 'options'], function forEachMethodNoData(method) {
    /*eslint func-names:0*/
    Axios.prototype[method] = function(url, config) {
      return this.request(utils.merge(config || {}, {
        method: method,
        url: url
      }));
    };
  });
  
  utils.forEach(['post', 'put', 'patch'], function forEachMethodWithData(method) {
    /*eslint func-names:0*/
    Axios.prototype[method] = function(url, data, config) {
      return this.request(utils.merge(config || {}, {
        method: method,
        url: url,
        data: data
      }));
    };
  });
  
  module.exports = Axios;
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/core/InterceptorManager.js":
  /*!***********************************************************!*\
    !*** ./node_modules/axios/lib/core/InterceptorManager.js ***!
    \***********************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  
  function InterceptorManager() {
    this.handlers = [];
  }
  
  /**
   * Add a new interceptor to the stack
   *
   * @param {Function} fulfilled The function to handle `then` for a `Promise`
   * @param {Function} rejected The function to handle `reject` for a `Promise`
   *
   * @return {Number} An ID used to remove interceptor later
   */
  InterceptorManager.prototype.use = function use(fulfilled, rejected) {
    this.handlers.push({
      fulfilled: fulfilled,
      rejected: rejected
    });
    return this.handlers.length - 1;
  };
  
  /**
   * Remove an interceptor from the stack
   *
   * @param {Number} id The ID that was returned by `use`
   */
  InterceptorManager.prototype.eject = function eject(id) {
    if (this.handlers[id]) {
      this.handlers[id] = null;
    }
  };
  
  /**
   * Iterate over all the registered interceptors
   *
   * This method is particularly useful for skipping over any
   * interceptors that may have become `null` calling `eject`.
   *
   * @param {Function} fn The function to call for each interceptor
   */
  InterceptorManager.prototype.forEach = function forEach(fn) {
    utils.forEach(this.handlers, function forEachHandler(h) {
      if (h !== null) {
        fn(h);
      }
    });
  };
  
  module.exports = InterceptorManager;
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/core/createError.js":
  /*!****************************************************!*\
    !*** ./node_modules/axios/lib/core/createError.js ***!
    \****************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var enhanceError = __webpack_require__(/*! ./enhanceError */ "./node_modules/axios/lib/core/enhanceError.js");
  
  /**
   * Create an Error with the specified message, config, error code, request and response.
   *
   * @param {string} message The error message.
   * @param {Object} config The config.
   * @param {string} [code] The error code (for example, 'ECONNABORTED').
   * @param {Object} [request] The request.
   * @param {Object} [response] The response.
   * @returns {Error} The created error.
   */
  module.exports = function createError(message, config, code, request, response) {
    var error = new Error(message);
    return enhanceError(error, config, code, request, response);
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/core/dispatchRequest.js":
  /*!********************************************************!*\
    !*** ./node_modules/axios/lib/core/dispatchRequest.js ***!
    \********************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  var transformData = __webpack_require__(/*! ./transformData */ "./node_modules/axios/lib/core/transformData.js");
  var isCancel = __webpack_require__(/*! ../cancel/isCancel */ "./node_modules/axios/lib/cancel/isCancel.js");
  var defaults = __webpack_require__(/*! ../defaults */ "./node_modules/axios/lib/defaults.js");
  var isAbsoluteURL = __webpack_require__(/*! ./../helpers/isAbsoluteURL */ "./node_modules/axios/lib/helpers/isAbsoluteURL.js");
  var combineURLs = __webpack_require__(/*! ./../helpers/combineURLs */ "./node_modules/axios/lib/helpers/combineURLs.js");
  
  /**
   * Throws a `Cancel` if cancellation has been requested.
   */
  function throwIfCancellationRequested(config) {
    if (config.cancelToken) {
      config.cancelToken.throwIfRequested();
    }
  }
  
  /**
   * Dispatch a request to the server using the configured adapter.
   *
   * @param {object} config The config that is to be used for the request
   * @returns {Promise} The Promise to be fulfilled
   */
  module.exports = function dispatchRequest(config) {
    throwIfCancellationRequested(config);
  
    // Support baseURL config
    if (config.baseURL && !isAbsoluteURL(config.url)) {
      config.url = combineURLs(config.baseURL, config.url);
    }
  
    // Ensure headers exist
    config.headers = config.headers || {};
  
    // Transform request data
    config.data = transformData(
      config.data,
      config.headers,
      config.transformRequest
    );
  
    // Flatten headers
    config.headers = utils.merge(
      config.headers.common || {},
      config.headers[config.method] || {},
      config.headers || {}
    );
  
    utils.forEach(
      ['delete', 'get', 'head', 'post', 'put', 'patch', 'common'],
      function cleanHeaderConfig(method) {
        delete config.headers[method];
      }
    );
  
    var adapter = config.adapter || defaults.adapter;
  
    return adapter(config).then(function onAdapterResolution(response) {
      throwIfCancellationRequested(config);
  
      // Transform response data
      response.data = transformData(
        response.data,
        response.headers,
        config.transformResponse
      );
  
      return response;
    }, function onAdapterRejection(reason) {
      if (!isCancel(reason)) {
        throwIfCancellationRequested(config);
  
        // Transform response data
        if (reason && reason.response) {
          reason.response.data = transformData(
            reason.response.data,
            reason.response.headers,
            config.transformResponse
          );
        }
      }
  
      return Promise.reject(reason);
    });
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/core/enhanceError.js":
  /*!*****************************************************!*\
    !*** ./node_modules/axios/lib/core/enhanceError.js ***!
    \*****************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  /**
   * Update an Error with the specified config, error code, and response.
   *
   * @param {Error} error The error to update.
   * @param {Object} config The config.
   * @param {string} [code] The error code (for example, 'ECONNABORTED').
   * @param {Object} [request] The request.
   * @param {Object} [response] The response.
   * @returns {Error} The error.
   */
  module.exports = function enhanceError(error, config, code, request, response) {
    error.config = config;
    if (code) {
      error.code = code;
    }
    error.request = request;
    error.response = response;
    return error;
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/core/settle.js":
  /*!***********************************************!*\
    !*** ./node_modules/axios/lib/core/settle.js ***!
    \***********************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var createError = __webpack_require__(/*! ./createError */ "./node_modules/axios/lib/core/createError.js");
  
  /**
   * Resolve or reject a Promise based on response status.
   *
   * @param {Function} resolve A function that resolves the promise.
   * @param {Function} reject A function that rejects the promise.
   * @param {object} response The response.
   */
  module.exports = function settle(resolve, reject, response) {
    var validateStatus = response.config.validateStatus;
    // Note: status is not exposed by XDomainRequest
    if (!response.status || !validateStatus || validateStatus(response.status)) {
      resolve(response);
    } else {
      reject(createError(
        'Request failed with status code ' + response.status,
        response.config,
        null,
        response.request,
        response
      ));
    }
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/core/transformData.js":
  /*!******************************************************!*\
    !*** ./node_modules/axios/lib/core/transformData.js ***!
    \******************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  
  /**
   * Transform the data for a request or a response
   *
   * @param {Object|String} data The data to be transformed
   * @param {Array} headers The headers for the request or response
   * @param {Array|Function} fns A single function or Array of functions
   * @returns {*} The resulting transformed data
   */
  module.exports = function transformData(data, headers, fns) {
    /*eslint no-param-reassign:0*/
    utils.forEach(fns, function transform(fn) {
      data = fn(data, headers);
    });
  
    return data;
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/defaults.js":
  /*!********************************************!*\
    !*** ./node_modules/axios/lib/defaults.js ***!
    \********************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  /* WEBPACK VAR INJECTION */(function(process) {
  
  var utils = __webpack_require__(/*! ./utils */ "./node_modules/axios/lib/utils.js");
  var normalizeHeaderName = __webpack_require__(/*! ./helpers/normalizeHeaderName */ "./node_modules/axios/lib/helpers/normalizeHeaderName.js");
  
  var DEFAULT_CONTENT_TYPE = {
    'Content-Type': 'application/x-www-form-urlencoded'
  };
  
  function setContentTypeIfUnset(headers, value) {
    if (!utils.isUndefined(headers) && utils.isUndefined(headers['Content-Type'])) {
      headers['Content-Type'] = value;
    }
  }
  
  function getDefaultAdapter() {
    var adapter;
    if (typeof XMLHttpRequest !== 'undefined') {
      // For browsers use XHR adapter
      adapter = __webpack_require__(/*! ./adapters/xhr */ "./node_modules/axios/lib/adapters/xhr.js");
    } else if (typeof process !== 'undefined') {
      // For node use HTTP adapter
      adapter = __webpack_require__(/*! ./adapters/http */ "./node_modules/axios/lib/adapters/xhr.js");
    }
    return adapter;
  }
  
  var defaults = {
    adapter: getDefaultAdapter(),
  
    transformRequest: [function transformRequest(data, headers) {
      normalizeHeaderName(headers, 'Content-Type');
      if (utils.isFormData(data) ||
        utils.isArrayBuffer(data) ||
        utils.isBuffer(data) ||
        utils.isStream(data) ||
        utils.isFile(data) ||
        utils.isBlob(data)
      ) {
        return data;
      }
      if (utils.isArrayBufferView(data)) {
        return data.buffer;
      }
      if (utils.isURLSearchParams(data)) {
        setContentTypeIfUnset(headers, 'application/x-www-form-urlencoded;charset=utf-8');
        return data.toString();
      }
      if (utils.isObject(data)) {
        setContentTypeIfUnset(headers, 'application/json;charset=utf-8');
        return JSON.stringify(data);
      }
      return data;
    }],
  
    transformResponse: [function transformResponse(data) {
      /*eslint no-param-reassign:0*/
      if (typeof data === 'string') {
        try {
          data = JSON.parse(data);
        } catch (e) { /* Ignore */ }
      }
      return data;
    }],
  
    /**
     * A timeout in milliseconds to abort a request. If set to 0 (default) a
     * timeout is not created.
     */
    timeout: 0,
  
    xsrfCookieName: 'XSRF-TOKEN',
    xsrfHeaderName: 'X-XSRF-TOKEN',
  
    maxContentLength: -1,
  
    validateStatus: function validateStatus(status) {
      return status >= 200 && status < 300;
    }
  };
  
  defaults.headers = {
    common: {
      'Accept': 'application/json, text/plain, */*'
    }
  };
  
  utils.forEach(['delete', 'get', 'head'], function forEachMethodNoData(method) {
    defaults.headers[method] = {};
  });
  
  utils.forEach(['post', 'put', 'patch'], function forEachMethodWithData(method) {
    defaults.headers[method] = utils.merge(DEFAULT_CONTENT_TYPE);
  });
  
  module.exports = defaults;
  
  /* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../../process/browser.js */ "./node_modules/process/browser.js")))
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/bind.js":
  /*!************************************************!*\
    !*** ./node_modules/axios/lib/helpers/bind.js ***!
    \************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  module.exports = function bind(fn, thisArg) {
    return function wrap() {
      var args = new Array(arguments.length);
      for (var i = 0; i < args.length; i++) {
        args[i] = arguments[i];
      }
      return fn.apply(thisArg, args);
    };
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/btoa.js":
  /*!************************************************!*\
    !*** ./node_modules/axios/lib/helpers/btoa.js ***!
    \************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  // btoa polyfill for IE<10 courtesy https://github.com/davidchambers/Base64.js
  
  var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
  
  function E() {
    this.message = 'String contains an invalid character';
  }
  E.prototype = new Error;
  E.prototype.code = 5;
  E.prototype.name = 'InvalidCharacterError';
  
  function btoa(input) {
    var str = String(input);
    var output = '';
    for (
      // initialize result and counter
      var block, charCode, idx = 0, map = chars;
      // if the next str index does not exist:
      //   change the mapping table to "="
      //   check if d has no fractional digits
      str.charAt(idx | 0) || (map = '=', idx % 1);
      // "8 - idx % 1 * 8" generates the sequence 2, 4, 6, 8
      output += map.charAt(63 & block >> 8 - idx % 1 * 8)
    ) {
      charCode = str.charCodeAt(idx += 3 / 4);
      if (charCode > 0xFF) {
        throw new E();
      }
      block = block << 8 | charCode;
    }
    return output;
  }
  
  module.exports = btoa;
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/buildURL.js":
  /*!****************************************************!*\
    !*** ./node_modules/axios/lib/helpers/buildURL.js ***!
    \****************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  
  function encode(val) {
    return encodeURIComponent(val).
      replace(/%40/gi, '@').
      replace(/%3A/gi, ':').
      replace(/%24/g, '$').
      replace(/%2C/gi, ',').
      replace(/%20/g, '+').
      replace(/%5B/gi, '[').
      replace(/%5D/gi, ']');
  }
  
  /**
   * Build a URL by appending params to the end
   *
   * @param {string} url The base of the url (e.g., http://www.google.com)
   * @param {object} [params] The params to be appended
   * @returns {string} The formatted url
   */
  module.exports = function buildURL(url, params, paramsSerializer) {
    /*eslint no-param-reassign:0*/
    if (!params) {
      return url;
    }
  
    var serializedParams;
    if (paramsSerializer) {
      serializedParams = paramsSerializer(params);
    } else if (utils.isURLSearchParams(params)) {
      serializedParams = params.toString();
    } else {
      var parts = [];
  
      utils.forEach(params, function serialize(val, key) {
        if (val === null || typeof val === 'undefined') {
          return;
        }
  
        if (utils.isArray(val)) {
          key = key + '[]';
        } else {
          val = [val];
        }
  
        utils.forEach(val, function parseValue(v) {
          if (utils.isDate(v)) {
            v = v.toISOString();
          } else if (utils.isObject(v)) {
            v = JSON.stringify(v);
          }
          parts.push(encode(key) + '=' + encode(v));
        });
      });
  
      serializedParams = parts.join('&');
    }
  
    if (serializedParams) {
      url += (url.indexOf('?') === -1 ? '?' : '&') + serializedParams;
    }
  
    return url;
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/combineURLs.js":
  /*!*******************************************************!*\
    !*** ./node_modules/axios/lib/helpers/combineURLs.js ***!
    \*******************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  /**
   * Creates a new URL by combining the specified URLs
   *
   * @param {string} baseURL The base URL
   * @param {string} relativeURL The relative URL
   * @returns {string} The combined URL
   */
  module.exports = function combineURLs(baseURL, relativeURL) {
    return relativeURL
      ? baseURL.replace(/\/+$/, '') + '/' + relativeURL.replace(/^\/+/, '')
      : baseURL;
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/cookies.js":
  /*!***************************************************!*\
    !*** ./node_modules/axios/lib/helpers/cookies.js ***!
    \***************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  
  module.exports = (
    utils.isStandardBrowserEnv() ?
  
    // Standard browser envs support document.cookie
    (function standardBrowserEnv() {
      return {
        write: function write(name, value, expires, path, domain, secure) {
          var cookie = [];
          cookie.push(name + '=' + encodeURIComponent(value));
  
          if (utils.isNumber(expires)) {
            cookie.push('expires=' + new Date(expires).toGMTString());
          }
  
          if (utils.isString(path)) {
            cookie.push('path=' + path);
          }
  
          if (utils.isString(domain)) {
            cookie.push('domain=' + domain);
          }
  
          if (secure === true) {
            cookie.push('secure');
          }
  
          document.cookie = cookie.join('; ');
        },
  
        read: function read(name) {
          var match = document.cookie.match(new RegExp('(^|;\\s*)(' + name + ')=([^;]*)'));
          return (match ? decodeURIComponent(match[3]) : null);
        },
  
        remove: function remove(name) {
          this.write(name, '', Date.now() - 86400000);
        }
      };
    })() :
  
    // Non standard browser env (web workers, react-native) lack needed support.
    (function nonStandardBrowserEnv() {
      return {
        write: function write() {},
        read: function read() { return null; },
        remove: function remove() {}
      };
    })()
  );
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/isAbsoluteURL.js":
  /*!*********************************************************!*\
    !*** ./node_modules/axios/lib/helpers/isAbsoluteURL.js ***!
    \*********************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  /**
   * Determines whether the specified URL is absolute
   *
   * @param {string} url The URL to test
   * @returns {boolean} True if the specified URL is absolute, otherwise false
   */
  module.exports = function isAbsoluteURL(url) {
    // A URL is considered absolute if it begins with "<scheme>://" or "//" (protocol-relative URL).
    // RFC 3986 defines scheme name as a sequence of characters beginning with a letter and followed
    // by any combination of letters, digits, plus, period, or hyphen.
    return /^([a-z][a-z\d\+\-\.]*:)?\/\//i.test(url);
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/isURLSameOrigin.js":
  /*!***********************************************************!*\
    !*** ./node_modules/axios/lib/helpers/isURLSameOrigin.js ***!
    \***********************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  
  module.exports = (
    utils.isStandardBrowserEnv() ?
  
    // Standard browser envs have full support of the APIs needed to test
    // whether the request URL is of the same origin as current location.
    (function standardBrowserEnv() {
      var msie = /(msie|trident)/i.test(navigator.userAgent);
      var urlParsingNode = document.createElement('a');
      var originURL;
  
      /**
      * Parse a URL to discover it's components
      *
      * @param {String} url The URL to be parsed
      * @returns {Object}
      */
      function resolveURL(url) {
        var href = url;
  
        if (msie) {
          // IE needs attribute set twice to normalize properties
          urlParsingNode.setAttribute('href', href);
          href = urlParsingNode.href;
        }
  
        urlParsingNode.setAttribute('href', href);
  
        // urlParsingNode provides the UrlUtils interface - http://url.spec.whatwg.org/#urlutils
        return {
          href: urlParsingNode.href,
          protocol: urlParsingNode.protocol ? urlParsingNode.protocol.replace(/:$/, '') : '',
          host: urlParsingNode.host,
          search: urlParsingNode.search ? urlParsingNode.search.replace(/^\?/, '') : '',
          hash: urlParsingNode.hash ? urlParsingNode.hash.replace(/^#/, '') : '',
          hostname: urlParsingNode.hostname,
          port: urlParsingNode.port,
          pathname: (urlParsingNode.pathname.charAt(0) === '/') ?
                    urlParsingNode.pathname :
                    '/' + urlParsingNode.pathname
        };
      }
  
      originURL = resolveURL(window.location.href);
  
      /**
      * Determine if a URL shares the same origin as the current location
      *
      * @param {String} requestURL The URL to test
      * @returns {boolean} True if URL shares the same origin, otherwise false
      */
      return function isURLSameOrigin(requestURL) {
        var parsed = (utils.isString(requestURL)) ? resolveURL(requestURL) : requestURL;
        return (parsed.protocol === originURL.protocol &&
              parsed.host === originURL.host);
      };
    })() :
  
    // Non standard browser envs (web workers, react-native) lack needed support.
    (function nonStandardBrowserEnv() {
      return function isURLSameOrigin() {
        return true;
      };
    })()
  );
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/normalizeHeaderName.js":
  /*!***************************************************************!*\
    !*** ./node_modules/axios/lib/helpers/normalizeHeaderName.js ***!
    \***************************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ../utils */ "./node_modules/axios/lib/utils.js");
  
  module.exports = function normalizeHeaderName(headers, normalizedName) {
    utils.forEach(headers, function processHeader(value, name) {
      if (name !== normalizedName && name.toUpperCase() === normalizedName.toUpperCase()) {
        headers[normalizedName] = value;
        delete headers[name];
      }
    });
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/parseHeaders.js":
  /*!********************************************************!*\
    !*** ./node_modules/axios/lib/helpers/parseHeaders.js ***!
    \********************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var utils = __webpack_require__(/*! ./../utils */ "./node_modules/axios/lib/utils.js");
  
  // Headers whose duplicates are ignored by node
  // c.f. https://nodejs.org/api/http.html#http_message_headers
  var ignoreDuplicateOf = [
    'age', 'authorization', 'content-length', 'content-type', 'etag',
    'expires', 'from', 'host', 'if-modified-since', 'if-unmodified-since',
    'last-modified', 'location', 'max-forwards', 'proxy-authorization',
    'referer', 'retry-after', 'user-agent'
  ];
  
  /**
   * Parse headers into an object
   *
   * ```
   * Date: Wed, 27 Aug 2014 08:58:49 GMT
   * Content-Type: application/json
   * Connection: keep-alive
   * Transfer-Encoding: chunked
   * ```
   *
   * @param {String} headers Headers needing to be parsed
   * @returns {Object} Headers parsed into an object
   */
  module.exports = function parseHeaders(headers) {
    var parsed = {};
    var key;
    var val;
    var i;
  
    if (!headers) { return parsed; }
  
    utils.forEach(headers.split('\n'), function parser(line) {
      i = line.indexOf(':');
      key = utils.trim(line.substr(0, i)).toLowerCase();
      val = utils.trim(line.substr(i + 1));
  
      if (key) {
        if (parsed[key] && ignoreDuplicateOf.indexOf(key) >= 0) {
          return;
        }
        if (key === 'set-cookie') {
          parsed[key] = (parsed[key] ? parsed[key] : []).concat([val]);
        } else {
          parsed[key] = parsed[key] ? parsed[key] + ', ' + val : val;
        }
      }
    });
  
    return parsed;
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/helpers/spread.js":
  /*!**************************************************!*\
    !*** ./node_modules/axios/lib/helpers/spread.js ***!
    \**************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  /**
   * Syntactic sugar for invoking a function and expanding an array for arguments.
   *
   * Common use case would be to use `Function.prototype.apply`.
   *
   *  ```js
   *  function f(x, y, z) {}
   *  var args = [1, 2, 3];
   *  f.apply(null, args);
   *  ```
   *
   * With `spread` this example can be re-written.
   *
   *  ```js
   *  spread(function(x, y, z) {})([1, 2, 3]);
   *  ```
   *
   * @param {Function} callback
   * @returns {Function}
   */
  module.exports = function spread(callback) {
    return function wrap(arr) {
      return callback.apply(null, arr);
    };
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/axios/lib/utils.js":
  /*!*****************************************!*\
    !*** ./node_modules/axios/lib/utils.js ***!
    \*****************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  "use strict";
  
  
  var bind = __webpack_require__(/*! ./helpers/bind */ "./node_modules/axios/lib/helpers/bind.js");
  var isBuffer = __webpack_require__(/*! is-buffer */ "./node_modules/is-buffer/index.js");
  
  /*global toString:true*/
  
  // utils is a library of generic helper functions non-specific to axios
  
  var toString = Object.prototype.toString;
  
  /**
   * Determine if a value is an Array
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is an Array, otherwise false
   */
  function isArray(val) {
    return toString.call(val) === '[object Array]';
  }
  
  /**
   * Determine if a value is an ArrayBuffer
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is an ArrayBuffer, otherwise false
   */
  function isArrayBuffer(val) {
    return toString.call(val) === '[object ArrayBuffer]';
  }
  
  /**
   * Determine if a value is a FormData
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is an FormData, otherwise false
   */
  function isFormData(val) {
    return (typeof FormData !== 'undefined') && (val instanceof FormData);
  }
  
  /**
   * Determine if a value is a view on an ArrayBuffer
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a view on an ArrayBuffer, otherwise false
   */
  function isArrayBufferView(val) {
    var result;
    if ((typeof ArrayBuffer !== 'undefined') && (ArrayBuffer.isView)) {
      result = ArrayBuffer.isView(val);
    } else {
      result = (val) && (val.buffer) && (val.buffer instanceof ArrayBuffer);
    }
    return result;
  }
  
  /**
   * Determine if a value is a String
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a String, otherwise false
   */
  function isString(val) {
    return typeof val === 'string';
  }
  
  /**
   * Determine if a value is a Number
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a Number, otherwise false
   */
  function isNumber(val) {
    return typeof val === 'number';
  }
  
  /**
   * Determine if a value is undefined
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if the value is undefined, otherwise false
   */
  function isUndefined(val) {
    return typeof val === 'undefined';
  }
  
  /**
   * Determine if a value is an Object
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is an Object, otherwise false
   */
  function isObject(val) {
    return val !== null && typeof val === 'object';
  }
  
  /**
   * Determine if a value is a Date
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a Date, otherwise false
   */
  function isDate(val) {
    return toString.call(val) === '[object Date]';
  }
  
  /**
   * Determine if a value is a File
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a File, otherwise false
   */
  function isFile(val) {
    return toString.call(val) === '[object File]';
  }
  
  /**
   * Determine if a value is a Blob
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a Blob, otherwise false
   */
  function isBlob(val) {
    return toString.call(val) === '[object Blob]';
  }
  
  /**
   * Determine if a value is a Function
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a Function, otherwise false
   */
  function isFunction(val) {
    return toString.call(val) === '[object Function]';
  }
  
  /**
   * Determine if a value is a Stream
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a Stream, otherwise false
   */
  function isStream(val) {
    return isObject(val) && isFunction(val.pipe);
  }
  
  /**
   * Determine if a value is a URLSearchParams object
   *
   * @param {Object} val The value to test
   * @returns {boolean} True if value is a URLSearchParams object, otherwise false
   */
  function isURLSearchParams(val) {
    return typeof URLSearchParams !== 'undefined' && val instanceof URLSearchParams;
  }
  
  /**
   * Trim excess whitespace off the beginning and end of a string
   *
   * @param {String} str The String to trim
   * @returns {String} The String freed of excess whitespace
   */
  function trim(str) {
    return str.replace(/^\s*/, '').replace(/\s*$/, '');
  }
  
  /**
   * Determine if we're running in a standard browser environment
   *
   * This allows axios to run in a web worker, and react-native.
   * Both environments support XMLHttpRequest, but not fully standard globals.
   *
   * web workers:
   *  typeof window -> undefined
   *  typeof document -> undefined
   *
   * react-native:
   *  navigator.product -> 'ReactNative'
   */
  function isStandardBrowserEnv() {
    if (typeof navigator !== 'undefined' && navigator.product === 'ReactNative') {
      return false;
    }
    return (
      typeof window !== 'undefined' &&
      typeof document !== 'undefined'
    );
  }
  
  /**
   * Iterate over an Array or an Object invoking a function for each item.
   *
   * If `obj` is an Array callback will be called passing
   * the value, index, and complete array for each item.
   *
   * If 'obj' is an Object callback will be called passing
   * the value, key, and complete object for each property.
   *
   * @param {Object|Array} obj The object to iterate
   * @param {Function} fn The callback to invoke for each item
   */
  function forEach(obj, fn) {
    // Don't bother if no value provided
    if (obj === null || typeof obj === 'undefined') {
      return;
    }
  
    // Force an array if not already something iterable
    if (typeof obj !== 'object') {
      /*eslint no-param-reassign:0*/
      obj = [obj];
    }
  
    if (isArray(obj)) {
      // Iterate over array values
      for (var i = 0, l = obj.length; i < l; i++) {
        fn.call(null, obj[i], i, obj);
      }
    } else {
      // Iterate over object keys
      for (var key in obj) {
        if (Object.prototype.hasOwnProperty.call(obj, key)) {
          fn.call(null, obj[key], key, obj);
        }
      }
    }
  }
  
  /**
   * Accepts varargs expecting each argument to be an object, then
   * immutably merges the properties of each object and returns result.
   *
   * When multiple objects contain the same key the later object in
   * the arguments list will take precedence.
   *
   * Example:
   *
   * ```js
   * var result = merge({foo: 123}, {foo: 456});
   * console.log(result.foo); // outputs 456
   * ```
   *
   * @param {Object} obj1 Object to merge
   * @returns {Object} Result of all merge properties
   */
  function merge(/* obj1, obj2, obj3, ... */) {
    var result = {};
    function assignValue(val, key) {
      if (typeof result[key] === 'object' && typeof val === 'object') {
        result[key] = merge(result[key], val);
      } else {
        result[key] = val;
      }
    }
  
    for (var i = 0, l = arguments.length; i < l; i++) {
      forEach(arguments[i], assignValue);
    }
    return result;
  }
  
  /**
   * Extends object a by mutably adding to it the properties of object b.
   *
   * @param {Object} a The object to be extended
   * @param {Object} b The object to copy properties from
   * @param {Object} thisArg The object to bind function to
   * @return {Object} The resulting value of object a
   */
  function extend(a, b, thisArg) {
    forEach(b, function assignValue(val, key) {
      if (thisArg && typeof val === 'function') {
        a[key] = bind(val, thisArg);
      } else {
        a[key] = val;
      }
    });
    return a;
  }
  
  module.exports = {
    isArray: isArray,
    isArrayBuffer: isArrayBuffer,
    isBuffer: isBuffer,
    isFormData: isFormData,
    isArrayBufferView: isArrayBufferView,
    isString: isString,
    isNumber: isNumber,
    isObject: isObject,
    isUndefined: isUndefined,
    isDate: isDate,
    isFile: isFile,
    isBlob: isBlob,
    isFunction: isFunction,
    isStream: isStream,
    isURLSearchParams: isURLSearchParams,
    isStandardBrowserEnv: isStandardBrowserEnv,
    forEach: forEach,
    merge: merge,
    extend: extend,
    trim: trim
  };
  
  
  /***/ }),
  
  /***/ "./node_modules/bootstrap-sass/assets/javascripts/bootstrap.js":
  /*!*********************************************************************!*\
    !*** ./node_modules/bootstrap-sass/assets/javascripts/bootstrap.js ***!
    \*********************************************************************/
  /*! no static exports found */
  /***/ (function(module, exports) {
  
  /*!
   * Bootstrap v3.4.1 (https://getbootstrap.com/)
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under the MIT license
   */
  
  if (typeof jQuery === 'undefined') {
    throw new Error('Bootstrap\'s JavaScript requires jQuery')
  }
  
  +function ($) {
    'use strict';
    var version = $.fn.jquery.split(' ')[0].split('.')
    if ((version[0] < 2 && version[1] < 9) || (version[0] == 1 && version[1] == 9 && version[2] < 1) || (version[0] > 3)) {
      throw new Error('Bootstrap\'s JavaScript requires jQuery version 1.9.1 or higher, but lower than version 4')
    }
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: transition.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#transitions
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // CSS TRANSITION SUPPORT (Shoutout: https://modernizr.com/)
    // ============================================================
  
    function transitionEnd() {
      var el = document.createElement('bootstrap')
  
      var transEndEventNames = {
        WebkitTransition : 'webkitTransitionEnd',
        MozTransition    : 'transitionend',
        OTransition      : 'oTransitionEnd otransitionend',
        transition       : 'transitionend'
      }
  
      for (var name in transEndEventNames) {
        if (el.style[name] !== undefined) {
          return { end: transEndEventNames[name] }
        }
      }
  
      return false // explicit for ie8 (  ._.)
    }
  
    // https://blog.alexmaccaw.com/css-transitions
    $.fn.emulateTransitionEnd = function (duration) {
      var called = false
      var $el = this
      $(this).one('bsTransitionEnd', function () { called = true })
      var callback = function () { if (!called) $($el).trigger($.support.transition.end) }
      setTimeout(callback, duration)
      return this
    }
  
    $(function () {
      $.support.transition = transitionEnd()
  
      if (!$.support.transition) return
  
      $.event.special.bsTransitionEnd = {
        bindType: $.support.transition.end,
        delegateType: $.support.transition.end,
        handle: function (e) {
          if ($(e.target).is(this)) return e.handleObj.handler.apply(this, arguments)
        }
      }
    })
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: alert.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#alerts
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // ALERT CLASS DEFINITION
    // ======================
  
    var dismiss = '[data-dismiss="alert"]'
    var Alert   = function (el) {
      $(el).on('click', dismiss, this.close)
    }
  
    Alert.VERSION = '3.4.1'
  
    Alert.TRANSITION_DURATION = 150
  
    Alert.prototype.close = function (e) {
      var $this    = $(this)
      var selector = $this.attr('data-target')
  
      if (!selector) {
        selector = $this.attr('href')
        selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') // strip for ie7
      }
  
      selector    = selector === '#' ? [] : selector
      var $parent = $(document).find(selector)
  
      if (e) e.preventDefault()
  
      if (!$parent.length) {
        $parent = $this.closest('.alert')
      }
  
      $parent.trigger(e = $.Event('close.bs.alert'))
  
      if (e.isDefaultPrevented()) return
  
      $parent.removeClass('in')
  
      function removeElement() {
        // detach from parent, fire event then clean up data
        $parent.detach().trigger('closed.bs.alert').remove()
      }
  
      $.support.transition && $parent.hasClass('fade') ?
        $parent
          .one('bsTransitionEnd', removeElement)
          .emulateTransitionEnd(Alert.TRANSITION_DURATION) :
        removeElement()
    }
  
  
    // ALERT PLUGIN DEFINITION
    // =======================
  
    function Plugin(option) {
      return this.each(function () {
        var $this = $(this)
        var data  = $this.data('bs.alert')
  
        if (!data) $this.data('bs.alert', (data = new Alert(this)))
        if (typeof option == 'string') data[option].call($this)
      })
    }
  
    var old = $.fn.alert
  
    $.fn.alert             = Plugin
    $.fn.alert.Constructor = Alert
  
  
    // ALERT NO CONFLICT
    // =================
  
    $.fn.alert.noConflict = function () {
      $.fn.alert = old
      return this
    }
  
  
    // ALERT DATA-API
    // ==============
  
    $(document).on('click.bs.alert.data-api', dismiss, Alert.prototype.close)
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: button.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#buttons
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // BUTTON PUBLIC CLASS DEFINITION
    // ==============================
  
    var Button = function (element, options) {
      this.$element  = $(element)
      this.options   = $.extend({}, Button.DEFAULTS, options)
      this.isLoading = false
    }
  
    Button.VERSION  = '3.4.1'
  
    Button.DEFAULTS = {
      loadingText: 'loading...'
    }
  
    Button.prototype.setState = function (state) {
      var d    = 'disabled'
      var $el  = this.$element
      var val  = $el.is('input') ? 'val' : 'html'
      var data = $el.data()
  
      state += 'Text'
  
      if (data.resetText == null) $el.data('resetText', $el[val]())
  
      // push to event loop to allow forms to submit
      setTimeout($.proxy(function () {
        $el[val](data[state] == null ? this.options[state] : data[state])
  
        if (state == 'loadingText') {
          this.isLoading = true
          $el.addClass(d).attr(d, d).prop(d, true)
        } else if (this.isLoading) {
          this.isLoading = false
          $el.removeClass(d).removeAttr(d).prop(d, false)
        }
      }, this), 0)
    }
  
    Button.prototype.toggle = function () {
      var changed = true
      var $parent = this.$element.closest('[data-toggle="buttons"]')
  
      if ($parent.length) {
        var $input = this.$element.find('input')
        if ($input.prop('type') == 'radio') {
          if ($input.prop('checked')) changed = false
          $parent.find('.active').removeClass('active')
          this.$element.addClass('active')
        } else if ($input.prop('type') == 'checkbox') {
          if (($input.prop('checked')) !== this.$element.hasClass('active')) changed = false
          this.$element.toggleClass('active')
        }
        $input.prop('checked', this.$element.hasClass('active'))
        if (changed) $input.trigger('change')
      } else {
        this.$element.attr('aria-pressed', !this.$element.hasClass('active'))
        this.$element.toggleClass('active')
      }
    }
  
  
    // BUTTON PLUGIN DEFINITION
    // ========================
  
    function Plugin(option) {
      return this.each(function () {
        var $this   = $(this)
        var data    = $this.data('bs.button')
        var options = typeof option == 'object' && option
  
        if (!data) $this.data('bs.button', (data = new Button(this, options)))
  
        if (option == 'toggle') data.toggle()
        else if (option) data.setState(option)
      })
    }
  
    var old = $.fn.button
  
    $.fn.button             = Plugin
    $.fn.button.Constructor = Button
  
  
    // BUTTON NO CONFLICT
    // ==================
  
    $.fn.button.noConflict = function () {
      $.fn.button = old
      return this
    }
  
  
    // BUTTON DATA-API
    // ===============
  
    $(document)
      .on('click.bs.button.data-api', '[data-toggle^="button"]', function (e) {
        var $btn = $(e.target).closest('.btn')
        Plugin.call($btn, 'toggle')
        if (!($(e.target).is('input[type="radio"], input[type="checkbox"]'))) {
          // Prevent double click on radios, and the double selections (so cancellation) on checkboxes
          e.preventDefault()
          // The target component still receive the focus
          if ($btn.is('input,button')) $btn.trigger('focus')
          else $btn.find('input:visible,button:visible').first().trigger('focus')
        }
      })
      .on('focus.bs.button.data-api blur.bs.button.data-api', '[data-toggle^="button"]', function (e) {
        $(e.target).closest('.btn').toggleClass('focus', /^focus(in)?$/.test(e.type))
      })
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: carousel.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#carousel
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // CAROUSEL CLASS DEFINITION
    // =========================
  
    var Carousel = function (element, options) {
      this.$element    = $(element)
      this.$indicators = this.$element.find('.carousel-indicators')
      this.options     = options
      this.paused      = null
      this.sliding     = null
      this.interval    = null
      this.$active     = null
      this.$items      = null
  
      this.options.keyboard && this.$element.on('keydown.bs.carousel', $.proxy(this.keydown, this))
  
      this.options.pause == 'hover' && !('ontouchstart' in document.documentElement) && this.$element
        .on('mouseenter.bs.carousel', $.proxy(this.pause, this))
        .on('mouseleave.bs.carousel', $.proxy(this.cycle, this))
    }
  
    Carousel.VERSION  = '3.4.1'
  
    Carousel.TRANSITION_DURATION = 600
  
    Carousel.DEFAULTS = {
      interval: 5000,
      pause: 'hover',
      wrap: true,
      keyboard: true
    }
  
    Carousel.prototype.keydown = function (e) {
      if (/input|textarea/i.test(e.target.tagName)) return
      switch (e.which) {
        case 37: this.prev(); break
        case 39: this.next(); break
        default: return
      }
  
      e.preventDefault()
    }
  
    Carousel.prototype.cycle = function (e) {
      e || (this.paused = false)
  
      this.interval && clearInterval(this.interval)
  
      this.options.interval
        && !this.paused
        && (this.interval = setInterval($.proxy(this.next, this), this.options.interval))
  
      return this
    }
  
    Carousel.prototype.getItemIndex = function (item) {
      this.$items = item.parent().children('.item')
      return this.$items.index(item || this.$active)
    }
  
    Carousel.prototype.getItemForDirection = function (direction, active) {
      var activeIndex = this.getItemIndex(active)
      var willWrap = (direction == 'prev' && activeIndex === 0)
                  || (direction == 'next' && activeIndex == (this.$items.length - 1))
      if (willWrap && !this.options.wrap) return active
      var delta = direction == 'prev' ? -1 : 1
      var itemIndex = (activeIndex + delta) % this.$items.length
      return this.$items.eq(itemIndex)
    }
  
    Carousel.prototype.to = function (pos) {
      var that        = this
      var activeIndex = this.getItemIndex(this.$active = this.$element.find('.item.active'))
  
      if (pos > (this.$items.length - 1) || pos < 0) return
  
      if (this.sliding)       return this.$element.one('slid.bs.carousel', function () { that.to(pos) }) // yes, "slid"
      if (activeIndex == pos) return this.pause().cycle()
  
      return this.slide(pos > activeIndex ? 'next' : 'prev', this.$items.eq(pos))
    }
  
    Carousel.prototype.pause = function (e) {
      e || (this.paused = true)
  
      if (this.$element.find('.next, .prev').length && $.support.transition) {
        this.$element.trigger($.support.transition.end)
        this.cycle(true)
      }
  
      this.interval = clearInterval(this.interval)
  
      return this
    }
  
    Carousel.prototype.next = function () {
      if (this.sliding) return
      return this.slide('next')
    }
  
    Carousel.prototype.prev = function () {
      if (this.sliding) return
      return this.slide('prev')
    }
  
    Carousel.prototype.slide = function (type, next) {
      var $active   = this.$element.find('.item.active')
      var $next     = next || this.getItemForDirection(type, $active)
      var isCycling = this.interval
      var direction = type == 'next' ? 'left' : 'right'
      var that      = this
  
      if ($next.hasClass('active')) return (this.sliding = false)
  
      var relatedTarget = $next[0]
      var slideEvent = $.Event('slide.bs.carousel', {
        relatedTarget: relatedTarget,
        direction: direction
      })
      this.$element.trigger(slideEvent)
      if (slideEvent.isDefaultPrevented()) return
  
      this.sliding = true
  
      isCycling && this.pause()
  
      if (this.$indicators.length) {
        this.$indicators.find('.active').removeClass('active')
        var $nextIndicator = $(this.$indicators.children()[this.getItemIndex($next)])
        $nextIndicator && $nextIndicator.addClass('active')
      }
  
      var slidEvent = $.Event('slid.bs.carousel', { relatedTarget: relatedTarget, direction: direction }) // yes, "slid"
      if ($.support.transition && this.$element.hasClass('slide')) {
        $next.addClass(type)
        if (typeof $next === 'object' && $next.length) {
          $next[0].offsetWidth // force reflow
        }
        $active.addClass(direction)
        $next.addClass(direction)
        $active
          .one('bsTransitionEnd', function () {
            $next.removeClass([type, direction].join(' ')).addClass('active')
            $active.removeClass(['active', direction].join(' '))
            that.sliding = false
            setTimeout(function () {
              that.$element.trigger(slidEvent)
            }, 0)
          })
          .emulateTransitionEnd(Carousel.TRANSITION_DURATION)
      } else {
        $active.removeClass('active')
        $next.addClass('active')
        this.sliding = false
        this.$element.trigger(slidEvent)
      }
  
      isCycling && this.cycle()
  
      return this
    }
  
  
    // CAROUSEL PLUGIN DEFINITION
    // ==========================
  
    function Plugin(option) {
      return this.each(function () {
        var $this   = $(this)
        var data    = $this.data('bs.carousel')
        var options = $.extend({}, Carousel.DEFAULTS, $this.data(), typeof option == 'object' && option)
        var action  = typeof option == 'string' ? option : options.slide
  
        if (!data) $this.data('bs.carousel', (data = new Carousel(this, options)))
        if (typeof option == 'number') data.to(option)
        else if (action) data[action]()
        else if (options.interval) data.pause().cycle()
      })
    }
  
    var old = $.fn.carousel
  
    $.fn.carousel             = Plugin
    $.fn.carousel.Constructor = Carousel
  
  
    // CAROUSEL NO CONFLICT
    // ====================
  
    $.fn.carousel.noConflict = function () {
      $.fn.carousel = old
      return this
    }
  
  
    // CAROUSEL DATA-API
    // =================
  
    var clickHandler = function (e) {
      var $this   = $(this)
      var href    = $this.attr('href')
      if (href) {
        href = href.replace(/.*(?=#[^\s]+$)/, '') // strip for ie7
      }
  
      var target  = $this.attr('data-target') || href
      var $target = $(document).find(target)
  
      if (!$target.hasClass('carousel')) return
  
      var options = $.extend({}, $target.data(), $this.data())
      var slideIndex = $this.attr('data-slide-to')
      if (slideIndex) options.interval = false
  
      Plugin.call($target, options)
  
      if (slideIndex) {
        $target.data('bs.carousel').to(slideIndex)
      }
  
      e.preventDefault()
    }
  
    $(document)
      .on('click.bs.carousel.data-api', '[data-slide]', clickHandler)
      .on('click.bs.carousel.data-api', '[data-slide-to]', clickHandler)
  
    $(window).on('load', function () {
      $('[data-ride="carousel"]').each(function () {
        var $carousel = $(this)
        Plugin.call($carousel, $carousel.data())
      })
    })
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: collapse.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#collapse
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  /* jshint latedef: false */
  
  +function ($) {
    'use strict';
  
    // COLLAPSE PUBLIC CLASS DEFINITION
    // ================================
  
    var Collapse = function (element, options) {
      this.$element      = $(element)
      this.options       = $.extend({}, Collapse.DEFAULTS, options)
      this.$trigger      = $('[data-toggle="collapse"][href="#' + element.id + '"],' +
                             '[data-toggle="collapse"][data-target="#' + element.id + '"]')
      this.transitioning = null
  
      if (this.options.parent) {
        this.$parent = this.getParent()
      } else {
        this.addAriaAndCollapsedClass(this.$element, this.$trigger)
      }
  
      if (this.options.toggle) this.toggle()
    }
  
    Collapse.VERSION  = '3.4.1'
  
    Collapse.TRANSITION_DURATION = 350
  
    Collapse.DEFAULTS = {
      toggle: true
    }
  
    Collapse.prototype.dimension = function () {
      var hasWidth = this.$element.hasClass('width')
      return hasWidth ? 'width' : 'height'
    }
  
    Collapse.prototype.show = function () {
      if (this.transitioning || this.$element.hasClass('in')) return
  
      var activesData
      var actives = this.$parent && this.$parent.children('.panel').children('.in, .collapsing')
  
      if (actives && actives.length) {
        activesData = actives.data('bs.collapse')
        if (activesData && activesData.transitioning) return
      }
  
      var startEvent = $.Event('show.bs.collapse')
      this.$element.trigger(startEvent)
      if (startEvent.isDefaultPrevented()) return
  
      if (actives && actives.length) {
        Plugin.call(actives, 'hide')
        activesData || actives.data('bs.collapse', null)
      }
  
      var dimension = this.dimension()
  
      this.$element
        .removeClass('collapse')
        .addClass('collapsing')[dimension](0)
        .attr('aria-expanded', true)
  
      this.$trigger
        .removeClass('collapsed')
        .attr('aria-expanded', true)
  
      this.transitioning = 1
  
      var complete = function () {
        this.$element
          .removeClass('collapsing')
          .addClass('collapse in')[dimension]('')
        this.transitioning = 0
        this.$element
          .trigger('shown.bs.collapse')
      }
  
      if (!$.support.transition) return complete.call(this)
  
      var scrollSize = $.camelCase(['scroll', dimension].join('-'))
  
      this.$element
        .one('bsTransitionEnd', $.proxy(complete, this))
        .emulateTransitionEnd(Collapse.TRANSITION_DURATION)[dimension](this.$element[0][scrollSize])
    }
  
    Collapse.prototype.hide = function () {
      if (this.transitioning || !this.$element.hasClass('in')) return
  
      var startEvent = $.Event('hide.bs.collapse')
      this.$element.trigger(startEvent)
      if (startEvent.isDefaultPrevented()) return
  
      var dimension = this.dimension()
  
      this.$element[dimension](this.$element[dimension]())[0].offsetHeight
  
      this.$element
        .addClass('collapsing')
        .removeClass('collapse in')
        .attr('aria-expanded', false)
  
      this.$trigger
        .addClass('collapsed')
        .attr('aria-expanded', false)
  
      this.transitioning = 1
  
      var complete = function () {
        this.transitioning = 0
        this.$element
          .removeClass('collapsing')
          .addClass('collapse')
          .trigger('hidden.bs.collapse')
      }
  
      if (!$.support.transition) return complete.call(this)
  
      this.$element
        [dimension](0)
        .one('bsTransitionEnd', $.proxy(complete, this))
        .emulateTransitionEnd(Collapse.TRANSITION_DURATION)
    }
  
    Collapse.prototype.toggle = function () {
      this[this.$element.hasClass('in') ? 'hide' : 'show']()
    }
  
    Collapse.prototype.getParent = function () {
      return $(document).find(this.options.parent)
        .find('[data-toggle="collapse"][data-parent="' + this.options.parent + '"]')
        .each($.proxy(function (i, element) {
          var $element = $(element)
          this.addAriaAndCollapsedClass(getTargetFromTrigger($element), $element)
        }, this))
        .end()
    }
  
    Collapse.prototype.addAriaAndCollapsedClass = function ($element, $trigger) {
      var isOpen = $element.hasClass('in')
  
      $element.attr('aria-expanded', isOpen)
      $trigger
        .toggleClass('collapsed', !isOpen)
        .attr('aria-expanded', isOpen)
    }
  
    function getTargetFromTrigger($trigger) {
      var href
      var target = $trigger.attr('data-target')
        || (href = $trigger.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '') // strip for ie7
  
      return $(document).find(target)
    }
  
  
    // COLLAPSE PLUGIN DEFINITION
    // ==========================
  
    function Plugin(option) {
      return this.each(function () {
        var $this   = $(this)
        var data    = $this.data('bs.collapse')
        var options = $.extend({}, Collapse.DEFAULTS, $this.data(), typeof option == 'object' && option)
  
        if (!data && options.toggle && /show|hide/.test(option)) options.toggle = false
        if (!data) $this.data('bs.collapse', (data = new Collapse(this, options)))
        if (typeof option == 'string') data[option]()
      })
    }
  
    var old = $.fn.collapse
  
    $.fn.collapse             = Plugin
    $.fn.collapse.Constructor = Collapse
  
  
    // COLLAPSE NO CONFLICT
    // ====================
  
    $.fn.collapse.noConflict = function () {
      $.fn.collapse = old
      return this
    }
  
  
    // COLLAPSE DATA-API
    // =================
  
    $(document).on('click.bs.collapse.data-api', '[data-toggle="collapse"]', function (e) {
      var $this   = $(this)
  
      if (!$this.attr('data-target')) e.preventDefault()
  
      var $target = getTargetFromTrigger($this)
      var data    = $target.data('bs.collapse')
      var option  = data ? 'toggle' : $this.data()
  
      Plugin.call($target, option)
    })
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: dropdown.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#dropdowns
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // DROPDOWN CLASS DEFINITION
    // =========================
  
    var backdrop = '.dropdown-backdrop'
    var toggle   = '[data-toggle="dropdown"]'
    var Dropdown = function (element) {
      $(element).on('click.bs.dropdown', this.toggle)
    }
  
    Dropdown.VERSION = '3.4.1'
  
    function getParent($this) {
      var selector = $this.attr('data-target')
  
      if (!selector) {
        selector = $this.attr('href')
        selector = selector && /#[A-Za-z]/.test(selector) && selector.replace(/.*(?=#[^\s]*$)/, '') // strip for ie7
      }
  
      var $parent = selector !== '#' ? $(document).find(selector) : null
  
      return $parent && $parent.length ? $parent : $this.parent()
    }
  
    function clearMenus(e) {
      if (e && e.which === 3) return
      $(backdrop).remove()
      $(toggle).each(function () {
        var $this         = $(this)
        var $parent       = getParent($this)
        var relatedTarget = { relatedTarget: this }
  
        if (!$parent.hasClass('open')) return
  
        if (e && e.type == 'click' && /input|textarea/i.test(e.target.tagName) && $.contains($parent[0], e.target)) return
  
        $parent.trigger(e = $.Event('hide.bs.dropdown', relatedTarget))
  
        if (e.isDefaultPrevented()) return
  
        $this.attr('aria-expanded', 'false')
        $parent.removeClass('open').trigger($.Event('hidden.bs.dropdown', relatedTarget))
      })
    }
  
    Dropdown.prototype.toggle = function (e) {
      var $this = $(this)
  
      if ($this.is('.disabled, :disabled')) return
  
      var $parent  = getParent($this)
      var isActive = $parent.hasClass('open')
  
      clearMenus()
  
      if (!isActive) {
        if ('ontouchstart' in document.documentElement && !$parent.closest('.navbar-nav').length) {
          // if mobile we use a backdrop because click events don't delegate
          $(document.createElement('div'))
            .addClass('dropdown-backdrop')
            .insertAfter($(this))
            .on('click', clearMenus)
        }
  
        var relatedTarget = { relatedTarget: this }
        $parent.trigger(e = $.Event('show.bs.dropdown', relatedTarget))
  
        if (e.isDefaultPrevented()) return
  
        $this
          .trigger('focus')
          .attr('aria-expanded', 'true')
  
        $parent
          .toggleClass('open')
          .trigger($.Event('shown.bs.dropdown', relatedTarget))
      }
  
      return false
    }
  
    Dropdown.prototype.keydown = function (e) {
      if (!/(38|40|27|32)/.test(e.which) || /input|textarea/i.test(e.target.tagName)) return
  
      var $this = $(this)
  
      e.preventDefault()
      e.stopPropagation()
  
      if ($this.is('.disabled, :disabled')) return
  
      var $parent  = getParent($this)
      var isActive = $parent.hasClass('open')
  
      if (!isActive && e.which != 27 || isActive && e.which == 27) {
        if (e.which == 27) $parent.find(toggle).trigger('focus')
        return $this.trigger('click')
      }
  
      var desc = ' li:not(.disabled):visible a'
      var $items = $parent.find('.dropdown-menu' + desc)
  
      if (!$items.length) return
  
      var index = $items.index(e.target)
  
      if (e.which == 38 && index > 0)                 index--         // up
      if (e.which == 40 && index < $items.length - 1) index++         // down
      if (!~index)                                    index = 0
  
      $items.eq(index).trigger('focus')
    }
  
  
    // DROPDOWN PLUGIN DEFINITION
    // ==========================
  
    function Plugin(option) {
      return this.each(function () {
        var $this = $(this)
        var data  = $this.data('bs.dropdown')
  
        if (!data) $this.data('bs.dropdown', (data = new Dropdown(this)))
        if (typeof option == 'string') data[option].call($this)
      })
    }
  
    var old = $.fn.dropdown
  
    $.fn.dropdown             = Plugin
    $.fn.dropdown.Constructor = Dropdown
  
  
    // DROPDOWN NO CONFLICT
    // ====================
  
    $.fn.dropdown.noConflict = function () {
      $.fn.dropdown = old
      return this
    }
  
  
    // APPLY TO STANDARD DROPDOWN ELEMENTS
    // ===================================
  
    $(document)
      .on('click.bs.dropdown.data-api', clearMenus)
      .on('click.bs.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() })
      .on('click.bs.dropdown.data-api', toggle, Dropdown.prototype.toggle)
      .on('keydown.bs.dropdown.data-api', toggle, Dropdown.prototype.keydown)
      .on('keydown.bs.dropdown.data-api', '.dropdown-menu', Dropdown.prototype.keydown)
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: modal.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#modals
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // MODAL CLASS DEFINITION
    // ======================
  
    var Modal = function (element, options) {
      this.options = options
      this.$body = $(document.body)
      this.$element = $(element)
      this.$dialog = this.$element.find('.modal-dialog')
      this.$backdrop = null
      this.isShown = null
      this.originalBodyPad = null
      this.scrollbarWidth = 0
      this.ignoreBackdropClick = false
      this.fixedContent = '.navbar-fixed-top, .navbar-fixed-bottom'
  
      if (this.options.remote) {
        this.$element
          .find('.modal-content')
          .load(this.options.remote, $.proxy(function () {
            this.$element.trigger('loaded.bs.modal')
          }, this))
      }
    }
  
    Modal.VERSION = '3.4.1'
  
    Modal.TRANSITION_DURATION = 300
    Modal.BACKDROP_TRANSITION_DURATION = 150
  
    Modal.DEFAULTS = {
      backdrop: true,
      keyboard: true,
      show: true
    }
  
    Modal.prototype.toggle = function (_relatedTarget) {
      return this.isShown ? this.hide() : this.show(_relatedTarget)
    }
  
    Modal.prototype.show = function (_relatedTarget) {
      var that = this
      var e = $.Event('show.bs.modal', { relatedTarget: _relatedTarget })
  
      this.$element.trigger(e)
  
      if (this.isShown || e.isDefaultPrevented()) return
  
      this.isShown = true
  
      this.checkScrollbar()
      this.setScrollbar()
      this.$body.addClass('modal-open')
  
      this.escape()
      this.resize()
  
      this.$element.on('click.dismiss.bs.modal', '[data-dismiss="modal"]', $.proxy(this.hide, this))
  
      this.$dialog.on('mousedown.dismiss.bs.modal', function () {
        that.$element.one('mouseup.dismiss.bs.modal', function (e) {
          if ($(e.target).is(that.$element)) that.ignoreBackdropClick = true
        })
      })
  
      this.backdrop(function () {
        var transition = $.support.transition && that.$element.hasClass('fade')
  
        if (!that.$element.parent().length) {
          that.$element.appendTo(that.$body) // don't move modals dom position
        }
  
        that.$element
          .show()
          .scrollTop(0)
  
        that.adjustDialog()
  
        if (transition) {
          that.$element[0].offsetWidth // force reflow
        }
  
        that.$element.addClass('in')
  
        that.enforceFocus()
  
        var e = $.Event('shown.bs.modal', { relatedTarget: _relatedTarget })
  
        transition ?
          that.$dialog // wait for modal to slide in
            .one('bsTransitionEnd', function () {
              that.$element.trigger('focus').trigger(e)
            })
            .emulateTransitionEnd(Modal.TRANSITION_DURATION) :
          that.$element.trigger('focus').trigger(e)
      })
    }
  
    Modal.prototype.hide = function (e) {
      if (e) e.preventDefault()
  
      e = $.Event('hide.bs.modal')
  
      this.$element.trigger(e)
  
      if (!this.isShown || e.isDefaultPrevented()) return
  
      this.isShown = false
  
      this.escape()
      this.resize()
  
      $(document).off('focusin.bs.modal')
  
      this.$element
        .removeClass('in')
        .off('click.dismiss.bs.modal')
        .off('mouseup.dismiss.bs.modal')
  
      this.$dialog.off('mousedown.dismiss.bs.modal')
  
      $.support.transition && this.$element.hasClass('fade') ?
        this.$element
          .one('bsTransitionEnd', $.proxy(this.hideModal, this))
          .emulateTransitionEnd(Modal.TRANSITION_DURATION) :
        this.hideModal()
    }
  
    Modal.prototype.enforceFocus = function () {
      $(document)
        .off('focusin.bs.modal') // guard against infinite focus loop
        .on('focusin.bs.modal', $.proxy(function (e) {
          if (document !== e.target &&
            this.$element[0] !== e.target &&
            !this.$element.has(e.target).length) {
            this.$element.trigger('focus')
          }
        }, this))
    }
  
    Modal.prototype.escape = function () {
      if (this.isShown && this.options.keyboard) {
        this.$element.on('keydown.dismiss.bs.modal', $.proxy(function (e) {
          e.which == 27 && this.hide()
        }, this))
      } else if (!this.isShown) {
        this.$element.off('keydown.dismiss.bs.modal')
      }
    }
  
    Modal.prototype.resize = function () {
      if (this.isShown) {
        $(window).on('resize.bs.modal', $.proxy(this.handleUpdate, this))
      } else {
        $(window).off('resize.bs.modal')
      }
    }
  
    Modal.prototype.hideModal = function () {
      var that = this
      this.$element.hide()
      this.backdrop(function () {
        that.$body.removeClass('modal-open')
        that.resetAdjustments()
        that.resetScrollbar()
        that.$element.trigger('hidden.bs.modal')
      })
    }
  
    Modal.prototype.removeBackdrop = function () {
      this.$backdrop && this.$backdrop.remove()
      this.$backdrop = null
    }
  
    Modal.prototype.backdrop = function (callback) {
      var that = this
      var animate = this.$element.hasClass('fade') ? 'fade' : ''
  
      if (this.isShown && this.options.backdrop) {
        var doAnimate = $.support.transition && animate
  
        this.$backdrop = $(document.createElement('div'))
          .addClass('modal-backdrop ' + animate)
          .appendTo(this.$body)
  
        this.$element.on('click.dismiss.bs.modal', $.proxy(function (e) {
          if (this.ignoreBackdropClick) {
            this.ignoreBackdropClick = false
            return
          }
          if (e.target !== e.currentTarget) return
          this.options.backdrop == 'static'
            ? this.$element[0].focus()
            : this.hide()
        }, this))
  
        if (doAnimate) this.$backdrop[0].offsetWidth // force reflow
  
        this.$backdrop.addClass('in')
  
        if (!callback) return
  
        doAnimate ?
          this.$backdrop
            .one('bsTransitionEnd', callback)
            .emulateTransitionEnd(Modal.BACKDROP_TRANSITION_DURATION) :
          callback()
  
      } else if (!this.isShown && this.$backdrop) {
        this.$backdrop.removeClass('in')
  
        var callbackRemove = function () {
          that.removeBackdrop()
          callback && callback()
        }
        $.support.transition && this.$element.hasClass('fade') ?
          this.$backdrop
            .one('bsTransitionEnd', callbackRemove)
            .emulateTransitionEnd(Modal.BACKDROP_TRANSITION_DURATION) :
          callbackRemove()
  
      } else if (callback) {
        callback()
      }
    }
  
    // these following methods are used to handle overflowing modals
  
    Modal.prototype.handleUpdate = function () {
      this.adjustDialog()
    }
  
    Modal.prototype.adjustDialog = function () {
      var modalIsOverflowing = this.$element[0].scrollHeight > document.documentElement.clientHeight
  
      this.$element.css({
        paddingLeft: !this.bodyIsOverflowing && modalIsOverflowing ? this.scrollbarWidth : '',
        paddingRight: this.bodyIsOverflowing && !modalIsOverflowing ? this.scrollbarWidth : ''
      })
    }
  
    Modal.prototype.resetAdjustments = function () {
      this.$element.css({
        paddingLeft: '',
        paddingRight: ''
      })
    }
  
    Modal.prototype.checkScrollbar = function () {
      var fullWindowWidth = window.innerWidth
      if (!fullWindowWidth) { // workaround for missing window.innerWidth in IE8
        var documentElementRect = document.documentElement.getBoundingClientRect()
        fullWindowWidth = documentElementRect.right - Math.abs(documentElementRect.left)
      }
      this.bodyIsOverflowing = document.body.clientWidth < fullWindowWidth
      this.scrollbarWidth = this.measureScrollbar()
    }
  
    Modal.prototype.setScrollbar = function () {
      var bodyPad = parseInt((this.$body.css('padding-right') || 0), 10)
      this.originalBodyPad = document.body.style.paddingRight || ''
      var scrollbarWidth = this.scrollbarWidth
      if (this.bodyIsOverflowing) {
        this.$body.css('padding-right', bodyPad + scrollbarWidth)
        $(this.fixedContent).each(function (index, element) {
          var actualPadding = element.style.paddingRight
          var calculatedPadding = $(element).css('padding-right')
          $(element)
            .data('padding-right', actualPadding)
            .css('padding-right', parseFloat(calculatedPadding) + scrollbarWidth + 'px')
        })
      }
    }
  
    Modal.prototype.resetScrollbar = function () {
      this.$body.css('padding-right', this.originalBodyPad)
      $(this.fixedContent).each(function (index, element) {
        var padding = $(element).data('padding-right')
        $(element).removeData('padding-right')
        element.style.paddingRight = padding ? padding : ''
      })
    }
  
    Modal.prototype.measureScrollbar = function () { // thx walsh
      var scrollDiv = document.createElement('div')
      scrollDiv.className = 'modal-scrollbar-measure'
      this.$body.append(scrollDiv)
      var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth
      this.$body[0].removeChild(scrollDiv)
      return scrollbarWidth
    }
  
  
    // MODAL PLUGIN DEFINITION
    // =======================
  
    function Plugin(option, _relatedTarget) {
      return this.each(function () {
        var $this = $(this)
        var data = $this.data('bs.modal')
        var options = $.extend({}, Modal.DEFAULTS, $this.data(), typeof option == 'object' && option)
  
        if (!data) $this.data('bs.modal', (data = new Modal(this, options)))
        if (typeof option == 'string') data[option](_relatedTarget)
        else if (options.show) data.show(_relatedTarget)
      })
    }
  
    var old = $.fn.modal
  
    $.fn.modal = Plugin
    $.fn.modal.Constructor = Modal
  
  
    // MODAL NO CONFLICT
    // =================
  
    $.fn.modal.noConflict = function () {
      $.fn.modal = old
      return this
    }
  
  
    // MODAL DATA-API
    // ==============
  
    $(document).on('click.bs.modal.data-api', '[data-toggle="modal"]', function (e) {
      var $this = $(this)
      var href = $this.attr('href')
      var target = $this.attr('data-target') ||
        (href && href.replace(/.*(?=#[^\s]+$)/, '')) // strip for ie7
  
      var $target = $(document).find(target)
      var option = $target.data('bs.modal') ? 'toggle' : $.extend({ remote: !/#/.test(href) && href }, $target.data(), $this.data())
  
      if ($this.is('a')) e.preventDefault()
  
      $target.one('show.bs.modal', function (showEvent) {
        if (showEvent.isDefaultPrevented()) return // only register focus restorer if modal will actually get shown
        $target.one('hidden.bs.modal', function () {
          $this.is(':visible') && $this.trigger('focus')
        })
      })
      Plugin.call($target, option, this)
    })
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: tooltip.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#tooltip
   * Inspired by the original jQuery.tipsy by Jason Frame
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  +function ($) {
    'use strict';
  
    var DISALLOWED_ATTRIBUTES = ['sanitize', 'whiteList', 'sanitizeFn']
  
    var uriAttrs = [
      'background',
      'cite',
      'href',
      'itemtype',
      'longdesc',
      'poster',
      'src',
      'xlink:href'
    ]
  
    var ARIA_ATTRIBUTE_PATTERN = /^aria-[\w-]*$/i
  
    var DefaultWhitelist = {
      // Global attributes allowed on any supplied element below.
      '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],
      a: ['target', 'href', 'title', 'rel'],
      area: [],
      b: [],
      br: [],
      col: [],
      code: [],
      div: [],
      em: [],
      hr: [],
      h1: [],
      h2: [],
      h3: [],
      h4: [],
      h5: [],
      h6: [],
      i: [],
      img: ['src', 'alt', 'title', 'width', 'height'],
      li: [],
      ol: [],
      p: [],
      pre: [],
      s: [],
      small: [],
      span: [],
      sub: [],
      sup: [],
      strong: [],
      u: [],
      ul: []
    }
  
    /**
     * A pattern that recognizes a commonly useful subset of URLs that are safe.
     *
     * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
     */
    var SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file):|[^&:/?#]*(?:[/?#]|$))/gi
  
    /**
     * A pattern that matches safe data URLs. Only matches image, video and audio types.
     *
     * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
     */
    var DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+/]+=*$/i
  
    function allowedAttribute(attr, allowedAttributeList) {
      var attrName = attr.nodeName.toLowerCase()
  
      if ($.inArray(attrName, allowedAttributeList) !== -1) {
        if ($.inArray(attrName, uriAttrs) !== -1) {
          return Boolean(attr.nodeValue.match(SAFE_URL_PATTERN) || attr.nodeValue.match(DATA_URL_PATTERN))
        }
  
        return true
      }
  
      var regExp = $(allowedAttributeList).filter(function (index, value) {
        return value instanceof RegExp
      })
  
      // Check if a regular expression validates the attribute.
      for (var i = 0, l = regExp.length; i < l; i++) {
        if (attrName.match(regExp[i])) {
          return true
        }
      }
  
      return false
    }
  
    function sanitizeHtml(unsafeHtml, whiteList, sanitizeFn) {
      if (unsafeHtml.length === 0) {
        return unsafeHtml
      }
  
      if (sanitizeFn && typeof sanitizeFn === 'function') {
        return sanitizeFn(unsafeHtml)
      }
  
      // IE 8 and below don't support createHTMLDocument
      if (!document.implementation || !document.implementation.createHTMLDocument) {
        return unsafeHtml
      }
  
      var createdDocument = document.implementation.createHTMLDocument('sanitization')
      createdDocument.body.innerHTML = unsafeHtml
  
      var whitelistKeys = $.map(whiteList, function (el, i) { return i })
      var elements = $(createdDocument.body).find('*')
  
      for (var i = 0, len = elements.length; i < len; i++) {
        var el = elements[i]
        var elName = el.nodeName.toLowerCase()
  
        if ($.inArray(elName, whitelistKeys) === -1) {
          el.parentNode.removeChild(el)
  
          continue
        }
  
        var attributeList = $.map(el.attributes, function (el) { return el })
        var whitelistedAttributes = [].concat(whiteList['*'] || [], whiteList[elName] || [])
  
        for (var j = 0, len2 = attributeList.length; j < len2; j++) {
          if (!allowedAttribute(attributeList[j], whitelistedAttributes)) {
            el.removeAttribute(attributeList[j].nodeName)
          }
        }
      }
  
      return createdDocument.body.innerHTML
    }
  
    // TOOLTIP PUBLIC CLASS DEFINITION
    // ===============================
  
    var Tooltip = function (element, options) {
      this.type       = null
      this.options    = null
      this.enabled    = null
      this.timeout    = null
      this.hoverState = null
      this.$element   = null
      this.inState    = null
  
      this.init('tooltip', element, options)
    }
  
    Tooltip.VERSION  = '3.4.1'
  
    Tooltip.TRANSITION_DURATION = 150
  
    Tooltip.DEFAULTS = {
      animation: true,
      placement: 'top',
      selector: false,
      template: '<div class="tooltip" role="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>',
      trigger: 'hover focus',
      title: '',
      delay: 0,
      html: false,
      container: false,
      viewport: {
        selector: 'body',
        padding: 0
      },
      sanitize : true,
      sanitizeFn : null,
      whiteList : DefaultWhitelist
    }
  
    Tooltip.prototype.init = function (type, element, options) {
      this.enabled   = true
      this.type      = type
      this.$element  = $(element)
      this.options   = this.getOptions(options)
      this.$viewport = this.options.viewport && $(document).find($.isFunction(this.options.viewport) ? this.options.viewport.call(this, this.$element) : (this.options.viewport.selector || this.options.viewport))
      this.inState   = { click: false, hover: false, focus: false }
  
      if (this.$element[0] instanceof document.constructor && !this.options.selector) {
        throw new Error('`selector` option must be specified when initializing ' + this.type + ' on the window.document object!')
      }
  
      var triggers = this.options.trigger.split(' ')
  
      for (var i = triggers.length; i--;) {
        var trigger = triggers[i]
  
        if (trigger == 'click') {
          this.$element.on('click.' + this.type, this.options.selector, $.proxy(this.toggle, this))
        } else if (trigger != 'manual') {
          var eventIn  = trigger == 'hover' ? 'mouseenter' : 'focusin'
          var eventOut = trigger == 'hover' ? 'mouseleave' : 'focusout'
  
          this.$element.on(eventIn  + '.' + this.type, this.options.selector, $.proxy(this.enter, this))
          this.$element.on(eventOut + '.' + this.type, this.options.selector, $.proxy(this.leave, this))
        }
      }
  
      this.options.selector ?
        (this._options = $.extend({}, this.options, { trigger: 'manual', selector: '' })) :
        this.fixTitle()
    }
  
    Tooltip.prototype.getDefaults = function () {
      return Tooltip.DEFAULTS
    }
  
    Tooltip.prototype.getOptions = function (options) {
      var dataAttributes = this.$element.data()
  
      for (var dataAttr in dataAttributes) {
        if (dataAttributes.hasOwnProperty(dataAttr) && $.inArray(dataAttr, DISALLOWED_ATTRIBUTES) !== -1) {
          delete dataAttributes[dataAttr]
        }
      }
  
      options = $.extend({}, this.getDefaults(), dataAttributes, options)
  
      if (options.delay && typeof options.delay == 'number') {
        options.delay = {
          show: options.delay,
          hide: options.delay
        }
      }
  
      if (options.sanitize) {
        options.template = sanitizeHtml(options.template, options.whiteList, options.sanitizeFn)
      }
  
      return options
    }
  
    Tooltip.prototype.getDelegateOptions = function () {
      var options  = {}
      var defaults = this.getDefaults()
  
      this._options && $.each(this._options, function (key, value) {
        if (defaults[key] != value) options[key] = value
      })
  
      return options
    }
  
    Tooltip.prototype.enter = function (obj) {
      var self = obj instanceof this.constructor ?
        obj : $(obj.currentTarget).data('bs.' + this.type)
  
      if (!self) {
        self = new this.constructor(obj.currentTarget, this.getDelegateOptions())
        $(obj.currentTarget).data('bs.' + this.type, self)
      }
  
      if (obj instanceof $.Event) {
        self.inState[obj.type == 'focusin' ? 'focus' : 'hover'] = true
      }
  
      if (self.tip().hasClass('in') || self.hoverState == 'in') {
        self.hoverState = 'in'
        return
      }
  
      clearTimeout(self.timeout)
  
      self.hoverState = 'in'
  
      if (!self.options.delay || !self.options.delay.show) return self.show()
  
      self.timeout = setTimeout(function () {
        if (self.hoverState == 'in') self.show()
      }, self.options.delay.show)
    }
  
    Tooltip.prototype.isInStateTrue = function () {
      for (var key in this.inState) {
        if (this.inState[key]) return true
      }
  
      return false
    }
  
    Tooltip.prototype.leave = function (obj) {
      var self = obj instanceof this.constructor ?
        obj : $(obj.currentTarget).data('bs.' + this.type)
  
      if (!self) {
        self = new this.constructor(obj.currentTarget, this.getDelegateOptions())
        $(obj.currentTarget).data('bs.' + this.type, self)
      }
  
      if (obj instanceof $.Event) {
        self.inState[obj.type == 'focusout' ? 'focus' : 'hover'] = false
      }
  
      if (self.isInStateTrue()) return
  
      clearTimeout(self.timeout)
  
      self.hoverState = 'out'
  
      if (!self.options.delay || !self.options.delay.hide) return self.hide()
  
      self.timeout = setTimeout(function () {
        if (self.hoverState == 'out') self.hide()
      }, self.options.delay.hide)
    }
  
    Tooltip.prototype.show = function () {
      var e = $.Event('show.bs.' + this.type)
  
      if (this.hasContent() && this.enabled) {
        this.$element.trigger(e)
  
        var inDom = $.contains(this.$element[0].ownerDocument.documentElement, this.$element[0])
        if (e.isDefaultPrevented() || !inDom) return
        var that = this
  
        var $tip = this.tip()
  
        var tipId = this.getUID(this.type)
  
        this.setContent()
        $tip.attr('id', tipId)
        this.$element.attr('aria-describedby', tipId)
  
        if (this.options.animation) $tip.addClass('fade')
  
        var placement = typeof this.options.placement == 'function' ?
          this.options.placement.call(this, $tip[0], this.$element[0]) :
          this.options.placement
  
        var autoToken = /\s?auto?\s?/i
        var autoPlace = autoToken.test(placement)
        if (autoPlace) placement = placement.replace(autoToken, '') || 'top'
  
        $tip
          .detach()
          .css({ top: 0, left: 0, display: 'block' })
          .addClass(placement)
          .data('bs.' + this.type, this)
  
        this.options.container ? $tip.appendTo($(document).find(this.options.container)) : $tip.insertAfter(this.$element)
        this.$element.trigger('inserted.bs.' + this.type)
  
        var pos          = this.getPosition()
        var actualWidth  = $tip[0].offsetWidth
        var actualHeight = $tip[0].offsetHeight
  
        if (autoPlace) {
          var orgPlacement = placement
          var viewportDim = this.getPosition(this.$viewport)
  
          placement = placement == 'bottom' && pos.bottom + actualHeight > viewportDim.bottom ? 'top'    :
                      placement == 'top'    && pos.top    - actualHeight < viewportDim.top    ? 'bottom' :
                      placement == 'right'  && pos.right  + actualWidth  > viewportDim.width  ? 'left'   :
                      placement == 'left'   && pos.left   - actualWidth  < viewportDim.left   ? 'right'  :
                      placement
  
          $tip
            .removeClass(orgPlacement)
            .addClass(placement)
        }
  
        var calculatedOffset = this.getCalculatedOffset(placement, pos, actualWidth, actualHeight)
  
        this.applyPlacement(calculatedOffset, placement)
  
        var complete = function () {
          var prevHoverState = that.hoverState
          that.$element.trigger('shown.bs.' + that.type)
          that.hoverState = null
  
          if (prevHoverState == 'out') that.leave(that)
        }
  
        $.support.transition && this.$tip.hasClass('fade') ?
          $tip
            .one('bsTransitionEnd', complete)
            .emulateTransitionEnd(Tooltip.TRANSITION_DURATION) :
          complete()
      }
    }
  
    Tooltip.prototype.applyPlacement = function (offset, placement) {
      var $tip   = this.tip()
      var width  = $tip[0].offsetWidth
      var height = $tip[0].offsetHeight
  
      // manually read margins because getBoundingClientRect includes difference
      var marginTop = parseInt($tip.css('margin-top'), 10)
      var marginLeft = parseInt($tip.css('margin-left'), 10)
  
      // we must check for NaN for ie 8/9
      if (isNaN(marginTop))  marginTop  = 0
      if (isNaN(marginLeft)) marginLeft = 0
  
      offset.top  += marginTop
      offset.left += marginLeft
  
      // $.fn.offset doesn't round pixel values
      // so we use setOffset directly with our own function B-0
      $.offset.setOffset($tip[0], $.extend({
        using: function (props) {
          $tip.css({
            top: Math.round(props.top),
            left: Math.round(props.left)
          })
        }
      }, offset), 0)
  
      $tip.addClass('in')
  
      // check to see if placing tip in new offset caused the tip to resize itself
      var actualWidth  = $tip[0].offsetWidth
      var actualHeight = $tip[0].offsetHeight
  
      if (placement == 'top' && actualHeight != height) {
        offset.top = offset.top + height - actualHeight
      }
  
      var delta = this.getViewportAdjustedDelta(placement, offset, actualWidth, actualHeight)
  
      if (delta.left) offset.left += delta.left
      else offset.top += delta.top
  
      var isVertical          = /top|bottom/.test(placement)
      var arrowDelta          = isVertical ? delta.left * 2 - width + actualWidth : delta.top * 2 - height + actualHeight
      var arrowOffsetPosition = isVertical ? 'offsetWidth' : 'offsetHeight'
  
      $tip.offset(offset)
      this.replaceArrow(arrowDelta, $tip[0][arrowOffsetPosition], isVertical)
    }
  
    Tooltip.prototype.replaceArrow = function (delta, dimension, isVertical) {
      this.arrow()
        .css(isVertical ? 'left' : 'top', 50 * (1 - delta / dimension) + '%')
        .css(isVertical ? 'top' : 'left', '')
    }
  
    Tooltip.prototype.setContent = function () {
      var $tip  = this.tip()
      var title = this.getTitle()
  
      if (this.options.html) {
        if (this.options.sanitize) {
          title = sanitizeHtml(title, this.options.whiteList, this.options.sanitizeFn)
        }
  
        $tip.find('.tooltip-inner').html(title)
      } else {
        $tip.find('.tooltip-inner').text(title)
      }
  
      $tip.removeClass('fade in top bottom left right')
    }
  
    Tooltip.prototype.hide = function (callback) {
      var that = this
      var $tip = $(this.$tip)
      var e    = $.Event('hide.bs.' + this.type)
  
      function complete() {
        if (that.hoverState != 'in') $tip.detach()
        if (that.$element) { // TODO: Check whether guarding this code with this `if` is really necessary.
          that.$element
            .removeAttr('aria-describedby')
            .trigger('hidden.bs.' + that.type)
        }
        callback && callback()
      }
  
      this.$element.trigger(e)
  
      if (e.isDefaultPrevented()) return
  
      $tip.removeClass('in')
  
      $.support.transition && $tip.hasClass('fade') ?
        $tip
          .one('bsTransitionEnd', complete)
          .emulateTransitionEnd(Tooltip.TRANSITION_DURATION) :
        complete()
  
      this.hoverState = null
  
      return this
    }
  
    Tooltip.prototype.fixTitle = function () {
      var $e = this.$element
      if ($e.attr('title') || typeof $e.attr('data-original-title') != 'string') {
        $e.attr('data-original-title', $e.attr('title') || '').attr('title', '')
      }
    }
  
    Tooltip.prototype.hasContent = function () {
      return this.getTitle()
    }
  
    Tooltip.prototype.getPosition = function ($element) {
      $element   = $element || this.$element
  
      var el     = $element[0]
      var isBody = el.tagName == 'BODY'
  
      var elRect    = el.getBoundingClientRect()
      if (elRect.width == null) {
        // width and height are missing in IE8, so compute them manually; see https://github.com/twbs/bootstrap/issues/14093
        elRect = $.extend({}, elRect, { width: elRect.right - elRect.left, height: elRect.bottom - elRect.top })
      }
      var isSvg = window.SVGElement && el instanceof window.SVGElement
      // Avoid using $.offset() on SVGs since it gives incorrect results in jQuery 3.
      // See https://github.com/twbs/bootstrap/issues/20280
      var elOffset  = isBody ? { top: 0, left: 0 } : (isSvg ? null : $element.offset())
      var scroll    = { scroll: isBody ? document.documentElement.scrollTop || document.body.scrollTop : $element.scrollTop() }
      var outerDims = isBody ? { width: $(window).width(), height: $(window).height() } : null
  
      return $.extend({}, elRect, scroll, outerDims, elOffset)
    }
  
    Tooltip.prototype.getCalculatedOffset = function (placement, pos, actualWidth, actualHeight) {
      return placement == 'bottom' ? { top: pos.top + pos.height,   left: pos.left + pos.width / 2 - actualWidth / 2 } :
             placement == 'top'    ? { top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2 } :
             placement == 'left'   ? { top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth } :
          /* placement == 'right' */ { top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width }
  
    }
  
    Tooltip.prototype.getViewportAdjustedDelta = function (placement, pos, actualWidth, actualHeight) {
      var delta = { top: 0, left: 0 }
      if (!this.$viewport) return delta
  
      var viewportPadding = this.options.viewport && this.options.viewport.padding || 0
      var viewportDimensions = this.getPosition(this.$viewport)
  
      if (/right|left/.test(placement)) {
        var topEdgeOffset    = pos.top - viewportPadding - viewportDimensions.scroll
        var bottomEdgeOffset = pos.top + viewportPadding - viewportDimensions.scroll + actualHeight
        if (topEdgeOffset < viewportDimensions.top) { // top overflow
          delta.top = viewportDimensions.top - topEdgeOffset
        } else if (bottomEdgeOffset > viewportDimensions.top + viewportDimensions.height) { // bottom overflow
          delta.top = viewportDimensions.top + viewportDimensions.height - bottomEdgeOffset
        }
      } else {
        var leftEdgeOffset  = pos.left - viewportPadding
        var rightEdgeOffset = pos.left + viewportPadding + actualWidth
        if (leftEdgeOffset < viewportDimensions.left) { // left overflow
          delta.left = viewportDimensions.left - leftEdgeOffset
        } else if (rightEdgeOffset > viewportDimensions.right) { // right overflow
          delta.left = viewportDimensions.left + viewportDimensions.width - rightEdgeOffset
        }
      }
  
      return delta
    }
  
    Tooltip.prototype.getTitle = function () {
      var title
      var $e = this.$element
      var o  = this.options
  
      title = $e.attr('data-original-title')
        || (typeof o.title == 'function' ? o.title.call($e[0]) :  o.title)
  
      return title
    }
  
    Tooltip.prototype.getUID = function (prefix) {
      do prefix += ~~(Math.random() * 1000000)
      while (document.getElementById(prefix))
      return prefix
    }
  
    Tooltip.prototype.tip = function () {
      if (!this.$tip) {
        this.$tip = $(this.options.template)
        if (this.$tip.length != 1) {
          throw new Error(this.type + ' `template` option must consist of exactly 1 top-level element!')
        }
      }
      return this.$tip
    }
  
    Tooltip.prototype.arrow = function () {
      return (this.$arrow = this.$arrow || this.tip().find('.tooltip-arrow'))
    }
  
    Tooltip.prototype.enable = function () {
      this.enabled = true
    }
  
    Tooltip.prototype.disable = function () {
      this.enabled = false
    }
  
    Tooltip.prototype.toggleEnabled = function () {
      this.enabled = !this.enabled
    }
  
    Tooltip.prototype.toggle = function (e) {
      var self = this
      if (e) {
        self = $(e.currentTarget).data('bs.' + this.type)
        if (!self) {
          self = new this.constructor(e.currentTarget, this.getDelegateOptions())
          $(e.currentTarget).data('bs.' + this.type, self)
        }
      }
  
      if (e) {
        self.inState.click = !self.inState.click
        if (self.isInStateTrue()) self.enter(self)
        else self.leave(self)
      } else {
        self.tip().hasClass('in') ? self.leave(self) : self.enter(self)
      }
    }
  
    Tooltip.prototype.destroy = function () {
      var that = this
      clearTimeout(this.timeout)
      this.hide(function () {
        that.$element.off('.' + that.type).removeData('bs.' + that.type)
        if (that.$tip) {
          that.$tip.detach()
        }
        that.$tip = null
        that.$arrow = null
        that.$viewport = null
        that.$element = null
      })
    }
  
    Tooltip.prototype.sanitizeHtml = function (unsafeHtml) {
      return sanitizeHtml(unsafeHtml, this.options.whiteList, this.options.sanitizeFn)
    }
  
    // TOOLTIP PLUGIN DEFINITION
    // =========================
  
    function Plugin(option) {
      return this.each(function () {
        var $this   = $(this)
        var data    = $this.data('bs.tooltip')
        var options = typeof option == 'object' && option
  
        if (!data && /destroy|hide/.test(option)) return
        if (!data) $this.data('bs.tooltip', (data = new Tooltip(this, options)))
        if (typeof option == 'string') data[option]()
      })
    }
  
    var old = $.fn.tooltip
  
    $.fn.tooltip             = Plugin
    $.fn.tooltip.Constructor = Tooltip
  
  
    // TOOLTIP NO CONFLICT
    // ===================
  
    $.fn.tooltip.noConflict = function () {
      $.fn.tooltip = old
      return this
    }
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: popover.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#popovers
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // POPOVER PUBLIC CLASS DEFINITION
    // ===============================
  
    var Popover = function (element, options) {
      this.init('popover', element, options)
    }
  
    if (!$.fn.tooltip) throw new Error('Popover requires tooltip.js')
  
    Popover.VERSION  = '3.4.1'
  
    Popover.DEFAULTS = $.extend({}, $.fn.tooltip.Constructor.DEFAULTS, {
      placement: 'right',
      trigger: 'click',
      content: '',
      template: '<div class="popover" role="tooltip"><div class="arrow"></div><h3 class="popover-title"></h3><div class="popover-content"></div></div>'
    })
  
  
    // NOTE: POPOVER EXTENDS tooltip.js
    // ================================
  
    Popover.prototype = $.extend({}, $.fn.tooltip.Constructor.prototype)
  
    Popover.prototype.constructor = Popover
  
    Popover.prototype.getDefaults = function () {
      return Popover.DEFAULTS
    }
  
    Popover.prototype.setContent = function () {
      var $tip    = this.tip()
      var title   = this.getTitle()
      var content = this.getContent()
  
      if (this.options.html) {
        var typeContent = typeof content
  
        if (this.options.sanitize) {
          title = this.sanitizeHtml(title)
  
          if (typeContent === 'string') {
            content = this.sanitizeHtml(content)
          }
        }
  
        $tip.find('.popover-title').html(title)
        $tip.find('.popover-content').children().detach().end()[
          typeContent === 'string' ? 'html' : 'append'
        ](content)
      } else {
        $tip.find('.popover-title').text(title)
        $tip.find('.popover-content').children().detach().end().text(content)
      }
  
      $tip.removeClass('fade top bottom left right in')
  
      // IE8 doesn't accept hiding via the `:empty` pseudo selector, we have to do
      // this manually by checking the contents.
      if (!$tip.find('.popover-title').html()) $tip.find('.popover-title').hide()
    }
  
    Popover.prototype.hasContent = function () {
      return this.getTitle() || this.getContent()
    }
  
    Popover.prototype.getContent = function () {
      var $e = this.$element
      var o  = this.options
  
      return $e.attr('data-content')
        || (typeof o.content == 'function' ?
          o.content.call($e[0]) :
          o.content)
    }
  
    Popover.prototype.arrow = function () {
      return (this.$arrow = this.$arrow || this.tip().find('.arrow'))
    }
  
  
    // POPOVER PLUGIN DEFINITION
    // =========================
  
    function Plugin(option) {
      return this.each(function () {
        var $this   = $(this)
        var data    = $this.data('bs.popover')
        var options = typeof option == 'object' && option
  
        if (!data && /destroy|hide/.test(option)) return
        if (!data) $this.data('bs.popover', (data = new Popover(this, options)))
        if (typeof option == 'string') data[option]()
      })
    }
  
    var old = $.fn.popover
  
    $.fn.popover             = Plugin
    $.fn.popover.Constructor = Popover
  
  
    // POPOVER NO CONFLICT
    // ===================
  
    $.fn.popover.noConflict = function () {
      $.fn.popover = old
      return this
    }
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: scrollspy.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#scrollspy
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // SCROLLSPY CLASS DEFINITION
    // ==========================
  
    function ScrollSpy(element, options) {
      this.$body          = $(document.body)
      this.$scrollElement = $(element).is(document.body) ? $(window) : $(element)
      this.options        = $.extend({}, ScrollSpy.DEFAULTS, options)
      this.selector       = (this.options.target || '') + ' .nav li > a'
      this.offsets        = []
      this.targets        = []
      this.activeTarget   = null
      this.scrollHeight   = 0
  
      this.$scrollElement.on('scroll.bs.scrollspy', $.proxy(this.process, this))
      this.refresh()
      this.process()
    }
  
    ScrollSpy.VERSION  = '3.4.1'
  
    ScrollSpy.DEFAULTS = {
      offset: 10
    }
  
    ScrollSpy.prototype.getScrollHeight = function () {
      return this.$scrollElement[0].scrollHeight || Math.max(this.$body[0].scrollHeight, document.documentElement.scrollHeight)
    }
  
    ScrollSpy.prototype.refresh = function () {
      var that          = this
      var offsetMethod  = 'offset'
      var offsetBase    = 0
  
      this.offsets      = []
      this.targets      = []
      this.scrollHeight = this.getScrollHeight()
  
      if (!$.isWindow(this.$scrollElement[0])) {
        offsetMethod = 'position'
        offsetBase   = this.$scrollElement.scrollTop()
      }
  
      this.$body
        .find(this.selector)
        .map(function () {
          var $el   = $(this)
          var href  = $el.data('target') || $el.attr('href')
          var $href = /^#./.test(href) && $(href)
  
          return ($href
            && $href.length
            && $href.is(':visible')
            && [[$href[offsetMethod]().top + offsetBase, href]]) || null
        })
        .sort(function (a, b) { return a[0] - b[0] })
        .each(function () {
          that.offsets.push(this[0])
          that.targets.push(this[1])
        })
    }
  
    ScrollSpy.prototype.process = function () {
      var scrollTop    = this.$scrollElement.scrollTop() + this.options.offset
      var scrollHeight = this.getScrollHeight()
      var maxScroll    = this.options.offset + scrollHeight - this.$scrollElement.height()
      var offsets      = this.offsets
      var targets      = this.targets
      var activeTarget = this.activeTarget
      var i
  
      if (this.scrollHeight != scrollHeight) {
        this.refresh()
      }
  
      if (scrollTop >= maxScroll) {
        return activeTarget != (i = targets[targets.length - 1]) && this.activate(i)
      }
  
      if (activeTarget && scrollTop < offsets[0]) {
        this.activeTarget = null
        return this.clear()
      }
  
      for (i = offsets.length; i--;) {
        activeTarget != targets[i]
          && scrollTop >= offsets[i]
          && (offsets[i + 1] === undefined || scrollTop < offsets[i + 1])
          && this.activate(targets[i])
      }
    }
  
    ScrollSpy.prototype.activate = function (target) {
      this.activeTarget = target
  
      this.clear()
  
      var selector = this.selector +
        '[data-target="' + target + '"],' +
        this.selector + '[href="' + target + '"]'
  
      var active = $(selector)
        .parents('li')
        .addClass('active')
  
      if (active.parent('.dropdown-menu').length) {
        active = active
          .closest('li.dropdown')
          .addClass('active')
      }
  
      active.trigger('activate.bs.scrollspy')
    }
  
    ScrollSpy.prototype.clear = function () {
      $(this.selector)
        .parentsUntil(this.options.target, '.active')
        .removeClass('active')
    }
  
  
    // SCROLLSPY PLUGIN DEFINITION
    // ===========================
  
    function Plugin(option) {
      return this.each(function () {
        var $this   = $(this)
        var data    = $this.data('bs.scrollspy')
        var options = typeof option == 'object' && option
  
        if (!data) $this.data('bs.scrollspy', (data = new ScrollSpy(this, options)))
        if (typeof option == 'string') data[option]()
      })
    }
  
    var old = $.fn.scrollspy
  
    $.fn.scrollspy             = Plugin
    $.fn.scrollspy.Constructor = ScrollSpy
  
  
    // SCROLLSPY NO CONFLICT
    // =====================
  
    $.fn.scrollspy.noConflict = function () {
      $.fn.scrollspy = old
      return this
    }
  
  
    // SCROLLSPY DATA-API
    // ==================
  
    $(window).on('load.bs.scrollspy.data-api', function () {
      $('[data-spy="scroll"]').each(function () {
        var $spy = $(this)
        Plugin.call($spy, $spy.data())
      })
    })
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: tab.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#tabs
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // TAB CLASS DEFINITION
    // ====================
  
    var Tab = function (element) {
      // jscs:disable requireDollarBeforejQueryAssignment
      this.element = $(element)
      // jscs:enable requireDollarBeforejQueryAssignment
    }
  
    Tab.VERSION = '3.4.1'
  
    Tab.TRANSITION_DURATION = 150
  
    Tab.prototype.show = function () {
      var $this    = this.element
      var $ul      = $this.closest('ul:not(.dropdown-menu)')
      var selector = $this.data('target')
  
      if (!selector) {
        selector = $this.attr('href')
        selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') // strip for ie7
      }
  
      if ($this.parent('li').hasClass('active')) return
  
      var $previous = $ul.find('.active:last a')
      var hideEvent = $.Event('hide.bs.tab', {
        relatedTarget: $this[0]
      })
      var showEvent = $.Event('show.bs.tab', {
        relatedTarget: $previous[0]
      })
  
      $previous.trigger(hideEvent)
      $this.trigger(showEvent)
  
      if (showEvent.isDefaultPrevented() || hideEvent.isDefaultPrevented()) return
  
      var $target = $(document).find(selector)
  
      this.activate($this.closest('li'), $ul)
      this.activate($target, $target.parent(), function () {
        $previous.trigger({
          type: 'hidden.bs.tab',
          relatedTarget: $this[0]
        })
        $this.trigger({
          type: 'shown.bs.tab',
          relatedTarget: $previous[0]
        })
      })
    }
  
    Tab.prototype.activate = function (element, container, callback) {
      var $active    = container.find('> .active')
      var transition = callback
        && $.support.transition
        && ($active.length && $active.hasClass('fade') || !!container.find('> .fade').length)
  
      function next() {
        $active
          .removeClass('active')
          .find('> .dropdown-menu > .active')
          .removeClass('active')
          .end()
          .find('[data-toggle="tab"]')
          .attr('aria-expanded', false)
  
        element
          .addClass('active')
          .find('[data-toggle="tab"]')
          .attr('aria-expanded', true)
  
        if (transition) {
          element[0].offsetWidth // reflow for transition
          element.addClass('in')
        } else {
          element.removeClass('fade')
        }
  
        if (element.parent('.dropdown-menu').length) {
          element
            .closest('li.dropdown')
            .addClass('active')
            .end()
            .find('[data-toggle="tab"]')
            .attr('aria-expanded', true)
        }
  
        callback && callback()
      }
  
      $active.length && transition ?
        $active
          .one('bsTransitionEnd', next)
          .emulateTransitionEnd(Tab.TRANSITION_DURATION) :
        next()
  
      $active.removeClass('in')
    }
  
  
    // TAB PLUGIN DEFINITION
    // =====================
  
    function Plugin(option) {
      return this.each(function () {
        var $this = $(this)
        var data  = $this.data('bs.tab')
  
        if (!data) $this.data('bs.tab', (data = new Tab(this)))
        if (typeof option == 'string') data[option]()
      })
    }
  
    var old = $.fn.tab
  
    $.fn.tab             = Plugin
    $.fn.tab.Constructor = Tab
  
  
    // TAB NO CONFLICT
    // ===============
  
    $.fn.tab.noConflict = function () {
      $.fn.tab = old
      return this
    }
  
  
    // TAB DATA-API
    // ============
  
    var clickHandler = function (e) {
      e.preventDefault()
      Plugin.call($(this), 'show')
    }
  
    $(document)
      .on('click.bs.tab.data-api', '[data-toggle="tab"]', clickHandler)
      .on('click.bs.tab.data-api', '[data-toggle="pill"]', clickHandler)
  
  }(jQuery);
  
  /* ========================================================================
   * Bootstrap: affix.js v3.4.1
   * https://getbootstrap.com/docs/3.4/javascript/#affix
   * ========================================================================
   * Copyright 2011-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * ======================================================================== */
  
  
  +function ($) {
    'use strict';
  
    // AFFIX CLASS DEFINITION
    // ======================
  
    var Affix = function (element, options) {
      this.options = $.extend({}, Affix.DEFAULTS, options)
  
      var target = this.options.target === Affix.DEFAULTS.target ? $(this.options.target) : $(document).find(this.options.target)
  
      this.$target = target
        .on('scroll.bs.affix.data-api', $.proxy(this.checkPosition, this))
        .on('click.bs.affix.data-api',  $.proxy(this.checkPositionWithEventLoop, this))
  
      this.$element     = $(element)
      this.affixed      = null
      this.unpin        = null
      this.pinnedOffset = null
  
      this.checkPosition()
    }
  
    Affix.VERSION  = '3.4.1'
  
    Affix.RESET    = 'affix affix-top affix-bottom'
  
    Affix.DEFAULTS = {
      offset: 0,
      target: window
    }
  
    Affix.prototype.getState = function (scrollHeight, height, offsetTop, offsetBottom) {
      var scrollTop    = this.$target.scrollTop()
      var position     = this.$element.offset()
      var targetHeight = this.$target.height()
  
      if (offsetTop != null && this.affixed == 'top') return scrollTop < offsetTop ? 'top' : false
  
      if (this.affixed == 'bottom') {
        if (offsetTop != null) return (scrollTop + this.unpin <= position.top) ? false : 'bottom'
        return (scrollTop + targetHeight <= scrollHeight - offsetBottom) ? false : 'bottom'
      }
  
      var initializing   = this.affixed == null
      var colliderTop    = initializing ? scrollTop : position.top
      var colliderHeight = initializing ? targetHeight : height
  
      if (offsetTop != null && scrollTop <= offsetTop) return 'top'
      if (offsetBottom != null && (colliderTop + colliderHeight >= scrollHeight - offsetBottom)) return 'bottom'
  
      return false
    }
  
    Affix.prototype.getPinnedOffset = function () {
      if (this.pinnedOffset) return this.pinnedOffset
      this.$element.removeClass(Affix.RESET).addClass('affix')
      var scrollTop = this.$target.scrollTop()
      var position  = this.$element.offset()
      return (this.pinnedOffset = position.top - scrollTop)
    }
  
    Affix.prototype.checkPositionWithEventLoop = function () {
      setTimeout($.proxy(this.checkPosition, this), 1)
    }
  
    Affix.prototype.checkPosition = function () {
      if (!this.$element.is(':visible')) return
  
      var height       = this.$element.height()
      var offset       = this.options.offset
      var offsetTop    = offset.top
      var offsetBottom = offset.bottom
      var scrollHeight = Math.max($(document).height(), $(document.body).height())
  
      if (typeof offset != 'object')         offsetBottom = offsetTop = offset
      if (typeof offsetTop == 'function')    offsetTop    = offset.top(this.$element)
      if (typeof offsetBottom == 'function') offsetBottom = offset.bottom(this.$element)
  
      var affix = this.getState(scrollHeight, height, offsetTop, offsetBottom)
  
      if (this.affixed != affix) {
        if (this.unpin != null) this.$element.css('top', '')
  
        var affixType = 'affix' + (affix ? '-' + affix : '')
        var e         = $.Event(affixType + '.bs.affix')
  
        this.$element.trigger(e)
  
        if (e.isDefaultPrevented()) return
  
        this.affixed = affix
        this.unpin = affix == 'bottom' ? this.getPinnedOffset() : null
  
        this.$element
          .removeClass(Affix.RESET)
          .addClass(affixType)
          .trigger(affixType.replace('affix', 'affixed') + '.bs.affix')
      }
  
      if (affix == 'bottom') {
        this.$element.offset({
          top: scrollHeight - height - offsetBottom
        })
      }
    }
  
  
    // AFFIX PLUGIN DEFINITION
    // =======================
  
    function Plugin(option) {
      return this.each(function () {
        var $this   = $(this)
        var data    = $this.data('bs.affix')
        var options = typeof option == 'object' && option
  
        if (!data) $this.data('bs.affix', (data = new Affix(this, options)))
        if (typeof option == 'string') data[option]()
      })
    }
  
    var old = $.fn.affix
  
    $.fn.affix             = Plugin
    $.fn.affix.Constructor = Affix
  
  
    // AFFIX NO CONFLICT
    // =================
  
    $.fn.affix.noConflict = function () {
      $.fn.affix = old
      return this
    }
  
  
    // AFFIX DATA-API
    // ==============
  
    $(window).on('load', function () {
      $('[data-spy="affix"]').each(function () {
        var $spy = $(this)
        var data = $spy.data()
  
        data.offset = data.offset || {}
  
        if (data.offsetBottom != null) data.offset.bottom = data.offsetBottom
        if (data.offsetTop    != null) data.offset.top    = data.offsetTop
  
        Plugin.call($spy, data)
      })
    })
  
  }(jQuery);
  
  
  /***/ }),
  
  /***/ "./node_modules/is-buffer/index.js":
  /*!*****************************************!*\
    !*** ./node_modules/is-buffer/index.js ***!
    \*****************************************/
  /*! no static exports found */
  /***/ (function(module, exports) {
  
  /*!
   * Determine if an object is a Buffer
   *
   * @author   Feross Aboukhadijeh <https://feross.org>
   * @license  MIT
   */
  
  // The _isBuffer check is for Safari 5-7 support, because it's missing
  // Object.prototype.constructor. Remove this eventually
  module.exports = function (obj) {
    return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
  }
  
  function isBuffer (obj) {
    return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
  }
  
  // For Node v0.10 support. Remove this eventually.
  function isSlowBuffer (obj) {
    return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
  }
  
  
  /***/ }),
  
  /***/ "./node_modules/jquery/dist/jquery.js":
  /*!********************************************!*\
    !*** ./node_modules/jquery/dist/jquery.js ***!
    \********************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  var __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;/*!
   * jQuery JavaScript Library v3.3.1
   * https://jquery.com/
   *
   * Includes Sizzle.js
   * https://sizzlejs.com/
   *
   * Copyright JS Foundation and other contributors
   * Released under the MIT license
   * https://jquery.org/license
   *
   * Date: 2018-01-20T17:24Z
   */
  ( function( global, factory ) {
  
  	"use strict";
  
  	if (  true && typeof module.exports === "object" ) {
  
  		// For CommonJS and CommonJS-like environments where a proper `window`
  		// is present, execute the factory and get jQuery.
  		// For environments that do not have a `window` with a `document`
  		// (such as Node.js), expose a factory as module.exports.
  		// This accentuates the need for the creation of a real `window`.
  		// e.g. var jQuery = require("jquery")(window);
  		// See ticket #14549 for more info.
  		module.exports = global.document ?
  			factory( global, true ) :
  			function( w ) {
  				if ( !w.document ) {
  					throw new Error( "jQuery requires a window with a document" );
  				}
  				return factory( w );
  			};
  	} else {
  		factory( global );
  	}
  
  // Pass this if window is not defined yet
  } )( typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
  
  // Edge <= 12 - 13+, Firefox <=18 - 45+, IE 10 - 11, Safari 5.1 - 9+, iOS 6 - 9.1
  // throw exceptions when non-strict code (e.g., ASP.NET 4.5) accesses strict mode
  // arguments.callee.caller (trac-13335). But as of jQuery 3.0 (2016), strict mode should be common
  // enough that all such attempts are guarded in a try block.
  "use strict";
  
  var arr = [];
  
  var document = window.document;
  
  var getProto = Object.getPrototypeOf;
  
  var slice = arr.slice;
  
  var concat = arr.concat;
  
  var push = arr.push;
  
  var indexOf = arr.indexOf;
  
  var class2type = {};
  
  var toString = class2type.toString;
  
  var hasOwn = class2type.hasOwnProperty;
  
  var fnToString = hasOwn.toString;
  
  var ObjectFunctionString = fnToString.call( Object );
  
  var support = {};
  
  var isFunction = function isFunction( obj ) {
  
        // Support: Chrome <=57, Firefox <=52
        // In some browsers, typeof returns "function" for HTML <object> elements
        // (i.e., `typeof document.createElement( "object" ) === "function"`).
        // We don't want to classify *any* DOM node as a function.
        return typeof obj === "function" && typeof obj.nodeType !== "number";
    };
  
  
  var isWindow = function isWindow( obj ) {
  		return obj != null && obj === obj.window;
  	};
  
  
  
  
  	var preservedScriptAttributes = {
  		type: true,
  		src: true,
  		noModule: true
  	};
  
  	function DOMEval( code, doc, node ) {
  		doc = doc || document;
  
  		var i,
  			script = doc.createElement( "script" );
  
  		script.text = code;
  		if ( node ) {
  			for ( i in preservedScriptAttributes ) {
  				if ( node[ i ] ) {
  					script[ i ] = node[ i ];
  				}
  			}
  		}
  		doc.head.appendChild( script ).parentNode.removeChild( script );
  	}
  
  
  function toType( obj ) {
  	if ( obj == null ) {
  		return obj + "";
  	}
  
  	// Support: Android <=2.3 only (functionish RegExp)
  	return typeof obj === "object" || typeof obj === "function" ?
  		class2type[ toString.call( obj ) ] || "object" :
  		typeof obj;
  }
  /* global Symbol */
  // Defining this global in .eslintrc.json would create a danger of using the global
  // unguarded in another place, it seems safer to define global only for this module
  
  
  
  var
  	version = "3.3.1",
  
  	// Define a local copy of jQuery
  	jQuery = function( selector, context ) {
  
  		// The jQuery object is actually just the init constructor 'enhanced'
  		// Need init if jQuery is called (just allow error to be thrown if not included)
  		return new jQuery.fn.init( selector, context );
  	},
  
  	// Support: Android <=4.0 only
  	// Make sure we trim BOM and NBSP
  	rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
  
  jQuery.fn = jQuery.prototype = {
  
  	// The current version of jQuery being used
  	jquery: version,
  
  	constructor: jQuery,
  
  	// The default length of a jQuery object is 0
  	length: 0,
  
  	toArray: function() {
  		return slice.call( this );
  	},
  
  	// Get the Nth element in the matched element set OR
  	// Get the whole matched element set as a clean array
  	get: function( num ) {
  
  		// Return all the elements in a clean array
  		if ( num == null ) {
  			return slice.call( this );
  		}
  
  		// Return just the one element from the set
  		return num < 0 ? this[ num + this.length ] : this[ num ];
  	},
  
  	// Take an array of elements and push it onto the stack
  	// (returning the new matched element set)
  	pushStack: function( elems ) {
  
  		// Build a new jQuery matched element set
  		var ret = jQuery.merge( this.constructor(), elems );
  
  		// Add the old object onto the stack (as a reference)
  		ret.prevObject = this;
  
  		// Return the newly-formed element set
  		return ret;
  	},
  
  	// Execute a callback for every element in the matched set.
  	each: function( callback ) {
  		return jQuery.each( this, callback );
  	},
  
  	map: function( callback ) {
  		return this.pushStack( jQuery.map( this, function( elem, i ) {
  			return callback.call( elem, i, elem );
  		} ) );
  	},
  
  	slice: function() {
  		return this.pushStack( slice.apply( this, arguments ) );
  	},
  
  	first: function() {
  		return this.eq( 0 );
  	},
  
  	last: function() {
  		return this.eq( -1 );
  	},
  
  	eq: function( i ) {
  		var len = this.length,
  			j = +i + ( i < 0 ? len : 0 );
  		return this.pushStack( j >= 0 && j < len ? [ this[ j ] ] : [] );
  	},
  
  	end: function() {
  		return this.prevObject || this.constructor();
  	},
  
  	// For internal use only.
  	// Behaves like an Array's method, not like a jQuery method.
  	push: push,
  	sort: arr.sort,
  	splice: arr.splice
  };
  
  jQuery.extend = jQuery.fn.extend = function() {
  	var options, name, src, copy, copyIsArray, clone,
  		target = arguments[ 0 ] || {},
  		i = 1,
  		length = arguments.length,
  		deep = false;
  
  	// Handle a deep copy situation
  	if ( typeof target === "boolean" ) {
  		deep = target;
  
  		// Skip the boolean and the target
  		target = arguments[ i ] || {};
  		i++;
  	}
  
  	// Handle case when target is a string or something (possible in deep copy)
  	if ( typeof target !== "object" && !isFunction( target ) ) {
  		target = {};
  	}
  
  	// Extend jQuery itself if only one argument is passed
  	if ( i === length ) {
  		target = this;
  		i--;
  	}
  
  	for ( ; i < length; i++ ) {
  
  		// Only deal with non-null/undefined values
  		if ( ( options = arguments[ i ] ) != null ) {
  
  			// Extend the base object
  			for ( name in options ) {
  				src = target[ name ];
  				copy = options[ name ];
  
  				// Prevent never-ending loop
  				if ( target === copy ) {
  					continue;
  				}
  
  				// Recurse if we're merging plain objects or arrays
  				if ( deep && copy && ( jQuery.isPlainObject( copy ) ||
  					( copyIsArray = Array.isArray( copy ) ) ) ) {
  
  					if ( copyIsArray ) {
  						copyIsArray = false;
  						clone = src && Array.isArray( src ) ? src : [];
  
  					} else {
  						clone = src && jQuery.isPlainObject( src ) ? src : {};
  					}
  
  					// Never move original objects, clone them
  					target[ name ] = jQuery.extend( deep, clone, copy );
  
  				// Don't bring in undefined values
  				} else if ( copy !== undefined ) {
  					target[ name ] = copy;
  				}
  			}
  		}
  	}
  
  	// Return the modified object
  	return target;
  };
  
  jQuery.extend( {
  
  	// Unique for each copy of jQuery on the page
  	expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),
  
  	// Assume jQuery is ready without the ready module
  	isReady: true,
  
  	error: function( msg ) {
  		throw new Error( msg );
  	},
  
  	noop: function() {},
  
  	isPlainObject: function( obj ) {
  		var proto, Ctor;
  
  		// Detect obvious negatives
  		// Use toString instead of jQuery.type to catch host objects
  		if ( !obj || toString.call( obj ) !== "[object Object]" ) {
  			return false;
  		}
  
  		proto = getProto( obj );
  
  		// Objects with no prototype (e.g., `Object.create( null )`) are plain
  		if ( !proto ) {
  			return true;
  		}
  
  		// Objects with prototype are plain iff they were constructed by a global Object function
  		Ctor = hasOwn.call( proto, "constructor" ) && proto.constructor;
  		return typeof Ctor === "function" && fnToString.call( Ctor ) === ObjectFunctionString;
  	},
  
  	isEmptyObject: function( obj ) {
  
  		/* eslint-disable no-unused-vars */
  		// See https://github.com/eslint/eslint/issues/6125
  		var name;
  
  		for ( name in obj ) {
  			return false;
  		}
  		return true;
  	},
  
  	// Evaluates a script in a global context
  	globalEval: function( code ) {
  		DOMEval( code );
  	},
  
  	each: function( obj, callback ) {
  		var length, i = 0;
  
  		if ( isArrayLike( obj ) ) {
  			length = obj.length;
  			for ( ; i < length; i++ ) {
  				if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
  					break;
  				}
  			}
  		} else {
  			for ( i in obj ) {
  				if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
  					break;
  				}
  			}
  		}
  
  		return obj;
  	},
  
  	// Support: Android <=4.0 only
  	trim: function( text ) {
  		return text == null ?
  			"" :
  			( text + "" ).replace( rtrim, "" );
  	},
  
  	// results is for internal usage only
  	makeArray: function( arr, results ) {
  		var ret = results || [];
  
  		if ( arr != null ) {
  			if ( isArrayLike( Object( arr ) ) ) {
  				jQuery.merge( ret,
  					typeof arr === "string" ?
  					[ arr ] : arr
  				);
  			} else {
  				push.call( ret, arr );
  			}
  		}
  
  		return ret;
  	},
  
  	inArray: function( elem, arr, i ) {
  		return arr == null ? -1 : indexOf.call( arr, elem, i );
  	},
  
  	// Support: Android <=4.0 only, PhantomJS 1 only
  	// push.apply(_, arraylike) throws on ancient WebKit
  	merge: function( first, second ) {
  		var len = +second.length,
  			j = 0,
  			i = first.length;
  
  		for ( ; j < len; j++ ) {
  			first[ i++ ] = second[ j ];
  		}
  
  		first.length = i;
  
  		return first;
  	},
  
  	grep: function( elems, callback, invert ) {
  		var callbackInverse,
  			matches = [],
  			i = 0,
  			length = elems.length,
  			callbackExpect = !invert;
  
  		// Go through the array, only saving the items
  		// that pass the validator function
  		for ( ; i < length; i++ ) {
  			callbackInverse = !callback( elems[ i ], i );
  			if ( callbackInverse !== callbackExpect ) {
  				matches.push( elems[ i ] );
  			}
  		}
  
  		return matches;
  	},
  
  	// arg is for internal usage only
  	map: function( elems, callback, arg ) {
  		var length, value,
  			i = 0,
  			ret = [];
  
  		// Go through the array, translating each of the items to their new values
  		if ( isArrayLike( elems ) ) {
  			length = elems.length;
  			for ( ; i < length; i++ ) {
  				value = callback( elems[ i ], i, arg );
  
  				if ( value != null ) {
  					ret.push( value );
  				}
  			}
  
  		// Go through every key on the object,
  		} else {
  			for ( i in elems ) {
  				value = callback( elems[ i ], i, arg );
  
  				if ( value != null ) {
  					ret.push( value );
  				}
  			}
  		}
  
  		// Flatten any nested arrays
  		return concat.apply( [], ret );
  	},
  
  	// A global GUID counter for objects
  	guid: 1,
  
  	// jQuery.support is not used in Core but other projects attach their
  	// properties to it so it needs to exist.
  	support: support
  } );
  
  if ( typeof Symbol === "function" ) {
  	jQuery.fn[ Symbol.iterator ] = arr[ Symbol.iterator ];
  }
  
  // Populate the class2type map
  jQuery.each( "Boolean Number String Function Array Date RegExp Object Error Symbol".split( " " ),
  function( i, name ) {
  	class2type[ "[object " + name + "]" ] = name.toLowerCase();
  } );
  
  function isArrayLike( obj ) {
  
  	// Support: real iOS 8.2 only (not reproducible in simulator)
  	// `in` check used to prevent JIT error (gh-2145)
  	// hasOwn isn't used here due to false negatives
  	// regarding Nodelist length in IE
  	var length = !!obj && "length" in obj && obj.length,
  		type = toType( obj );
  
  	if ( isFunction( obj ) || isWindow( obj ) ) {
  		return false;
  	}
  
  	return type === "array" || length === 0 ||
  		typeof length === "number" && length > 0 && ( length - 1 ) in obj;
  }
  var Sizzle =
  /*!
   * Sizzle CSS Selector Engine v2.3.3
   * https://sizzlejs.com/
   *
   * Copyright jQuery Foundation and other contributors
   * Released under the MIT license
   * http://jquery.org/license
   *
   * Date: 2016-08-08
   */
  (function( window ) {
  
  var i,
  	support,
  	Expr,
  	getText,
  	isXML,
  	tokenize,
  	compile,
  	select,
  	outermostContext,
  	sortInput,
  	hasDuplicate,
  
  	// Local document vars
  	setDocument,
  	document,
  	docElem,
  	documentIsHTML,
  	rbuggyQSA,
  	rbuggyMatches,
  	matches,
  	contains,
  
  	// Instance-specific data
  	expando = "sizzle" + 1 * new Date(),
  	preferredDoc = window.document,
  	dirruns = 0,
  	done = 0,
  	classCache = createCache(),
  	tokenCache = createCache(),
  	compilerCache = createCache(),
  	sortOrder = function( a, b ) {
  		if ( a === b ) {
  			hasDuplicate = true;
  		}
  		return 0;
  	},
  
  	// Instance methods
  	hasOwn = ({}).hasOwnProperty,
  	arr = [],
  	pop = arr.pop,
  	push_native = arr.push,
  	push = arr.push,
  	slice = arr.slice,
  	// Use a stripped-down indexOf as it's faster than native
  	// https://jsperf.com/thor-indexof-vs-for/5
  	indexOf = function( list, elem ) {
  		var i = 0,
  			len = list.length;
  		for ( ; i < len; i++ ) {
  			if ( list[i] === elem ) {
  				return i;
  			}
  		}
  		return -1;
  	},
  
  	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
  
  	// Regular expressions
  
  	// http://www.w3.org/TR/css3-selectors/#whitespace
  	whitespace = "[\\x20\\t\\r\\n\\f]",
  
  	// http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
  	identifier = "(?:\\\\.|[\\w-]|[^\0-\\xa0])+",
  
  	// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
  	attributes = "\\[" + whitespace + "*(" + identifier + ")(?:" + whitespace +
  		// Operator (capture 2)
  		"*([*^$|!~]?=)" + whitespace +
  		// "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
  		"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
  		"*\\]",
  
  	pseudos = ":(" + identifier + ")(?:\\((" +
  		// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
  		// 1. quoted (capture 3; capture 4 or capture 5)
  		"('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
  		// 2. simple (capture 6)
  		"((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
  		// 3. anything else (capture 2)
  		".*" +
  		")\\)|)",
  
  	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
  	rwhitespace = new RegExp( whitespace + "+", "g" ),
  	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
  
  	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
  	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
  
  	rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),
  
  	rpseudo = new RegExp( pseudos ),
  	ridentifier = new RegExp( "^" + identifier + "$" ),
  
  	matchExpr = {
  		"ID": new RegExp( "^#(" + identifier + ")" ),
  		"CLASS": new RegExp( "^\\.(" + identifier + ")" ),
  		"TAG": new RegExp( "^(" + identifier + "|[*])" ),
  		"ATTR": new RegExp( "^" + attributes ),
  		"PSEUDO": new RegExp( "^" + pseudos ),
  		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
  			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
  			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
  		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
  		// For use in libraries implementing .is()
  		// We use this for POS matching in `select`
  		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
  			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
  	},
  
  	rinputs = /^(?:input|select|textarea|button)$/i,
  	rheader = /^h\d$/i,
  
  	rnative = /^[^{]+\{\s*\[native \w/,
  
  	// Easily-parseable/retrievable ID or TAG or CLASS selectors
  	rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
  
  	rsibling = /[+~]/,
  
  	// CSS escapes
  	// http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
  	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
  	funescape = function( _, escaped, escapedWhitespace ) {
  		var high = "0x" + escaped - 0x10000;
  		// NaN means non-codepoint
  		// Support: Firefox<24
  		// Workaround erroneous numeric interpretation of +"0x"
  		return high !== high || escapedWhitespace ?
  			escaped :
  			high < 0 ?
  				// BMP codepoint
  				String.fromCharCode( high + 0x10000 ) :
  				// Supplemental Plane codepoint (surrogate pair)
  				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
  	},
  
  	// CSS string/identifier serialization
  	// https://drafts.csswg.org/cssom/#common-serializing-idioms
  	rcssescape = /([\0-\x1f\x7f]|^-?\d)|^-$|[^\0-\x1f\x7f-\uFFFF\w-]/g,
  	fcssescape = function( ch, asCodePoint ) {
  		if ( asCodePoint ) {
  
  			// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER
  			if ( ch === "\0" ) {
  				return "\uFFFD";
  			}
  
  			// Control characters and (dependent upon position) numbers get escaped as code points
  			return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
  		}
  
  		// Other potentially-special ASCII characters get backslash-escaped
  		return "\\" + ch;
  	},
  
  	// Used for iframes
  	// See setDocument()
  	// Removing the function wrapper causes a "Permission Denied"
  	// error in IE
  	unloadHandler = function() {
  		setDocument();
  	},
  
  	disabledAncestor = addCombinator(
  		function( elem ) {
  			return elem.disabled === true && ("form" in elem || "label" in elem);
  		},
  		{ dir: "parentNode", next: "legend" }
  	);
  
  // Optimize for push.apply( _, NodeList )
  try {
  	push.apply(
  		(arr = slice.call( preferredDoc.childNodes )),
  		preferredDoc.childNodes
  	);
  	// Support: Android<4.0
  	// Detect silently failing push.apply
  	arr[ preferredDoc.childNodes.length ].nodeType;
  } catch ( e ) {
  	push = { apply: arr.length ?
  
  		// Leverage slice if possible
  		function( target, els ) {
  			push_native.apply( target, slice.call(els) );
  		} :
  
  		// Support: IE<9
  		// Otherwise append directly
  		function( target, els ) {
  			var j = target.length,
  				i = 0;
  			// Can't trust NodeList.length
  			while ( (target[j++] = els[i++]) ) {}
  			target.length = j - 1;
  		}
  	};
  }
  
  function Sizzle( selector, context, results, seed ) {
  	var m, i, elem, nid, match, groups, newSelector,
  		newContext = context && context.ownerDocument,
  
  		// nodeType defaults to 9, since context defaults to document
  		nodeType = context ? context.nodeType : 9;
  
  	results = results || [];
  
  	// Return early from calls with invalid selector or context
  	if ( typeof selector !== "string" || !selector ||
  		nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {
  
  		return results;
  	}
  
  	// Try to shortcut find operations (as opposed to filters) in HTML documents
  	if ( !seed ) {
  
  		if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
  			setDocument( context );
  		}
  		context = context || document;
  
  		if ( documentIsHTML ) {
  
  			// If the selector is sufficiently simple, try using a "get*By*" DOM method
  			// (excepting DocumentFragment context, where the methods don't exist)
  			if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
  
  				// ID selector
  				if ( (m = match[1]) ) {
  
  					// Document context
  					if ( nodeType === 9 ) {
  						if ( (elem = context.getElementById( m )) ) {
  
  							// Support: IE, Opera, Webkit
  							// TODO: identify versions
  							// getElementById can match elements by name instead of ID
  							if ( elem.id === m ) {
  								results.push( elem );
  								return results;
  							}
  						} else {
  							return results;
  						}
  
  					// Element context
  					} else {
  
  						// Support: IE, Opera, Webkit
  						// TODO: identify versions
  						// getElementById can match elements by name instead of ID
  						if ( newContext && (elem = newContext.getElementById( m )) &&
  							contains( context, elem ) &&
  							elem.id === m ) {
  
  							results.push( elem );
  							return results;
  						}
  					}
  
  				// Type selector
  				} else if ( match[2] ) {
  					push.apply( results, context.getElementsByTagName( selector ) );
  					return results;
  
  				// Class selector
  				} else if ( (m = match[3]) && support.getElementsByClassName &&
  					context.getElementsByClassName ) {
  
  					push.apply( results, context.getElementsByClassName( m ) );
  					return results;
  				}
  			}
  
  			// Take advantage of querySelectorAll
  			if ( support.qsa &&
  				!compilerCache[ selector + " " ] &&
  				(!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
  
  				if ( nodeType !== 1 ) {
  					newContext = context;
  					newSelector = selector;
  
  				// qSA looks outside Element context, which is not what we want
  				// Thanks to Andrew Dupont for this workaround technique
  				// Support: IE <=8
  				// Exclude object elements
  				} else if ( context.nodeName.toLowerCase() !== "object" ) {
  
  					// Capture the context ID, setting it first if necessary
  					if ( (nid = context.getAttribute( "id" )) ) {
  						nid = nid.replace( rcssescape, fcssescape );
  					} else {
  						context.setAttribute( "id", (nid = expando) );
  					}
  
  					// Prefix every selector in the list
  					groups = tokenize( selector );
  					i = groups.length;
  					while ( i-- ) {
  						groups[i] = "#" + nid + " " + toSelector( groups[i] );
  					}
  					newSelector = groups.join( "," );
  
  					// Expand context for sibling selectors
  					newContext = rsibling.test( selector ) && testContext( context.parentNode ) ||
  						context;
  				}
  
  				if ( newSelector ) {
  					try {
  						push.apply( results,
  							newContext.querySelectorAll( newSelector )
  						);
  						return results;
  					} catch ( qsaError ) {
  					} finally {
  						if ( nid === expando ) {
  							context.removeAttribute( "id" );
  						}
  					}
  				}
  			}
  		}
  	}
  
  	// All others
  	return select( selector.replace( rtrim, "$1" ), context, results, seed );
  }
  
  /**
   * Create key-value caches of limited size
   * @returns {function(string, object)} Returns the Object data after storing it on itself with
   *	property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
   *	deleting the oldest entry
   */
  function createCache() {
  	var keys = [];
  
  	function cache( key, value ) {
  		// Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
  		if ( keys.push( key + " " ) > Expr.cacheLength ) {
  			// Only keep the most recent entries
  			delete cache[ keys.shift() ];
  		}
  		return (cache[ key + " " ] = value);
  	}
  	return cache;
  }
  
  /**
   * Mark a function for special use by Sizzle
   * @param {Function} fn The function to mark
   */
  function markFunction( fn ) {
  	fn[ expando ] = true;
  	return fn;
  }
  
  /**
   * Support testing using an element
   * @param {Function} fn Passed the created element and returns a boolean result
   */
  function assert( fn ) {
  	var el = document.createElement("fieldset");
  
  	try {
  		return !!fn( el );
  	} catch (e) {
  		return false;
  	} finally {
  		// Remove from its parent by default
  		if ( el.parentNode ) {
  			el.parentNode.removeChild( el );
  		}
  		// release memory in IE
  		el = null;
  	}
  }
  
  /**
   * Adds the same handler for all of the specified attrs
   * @param {String} attrs Pipe-separated list of attributes
   * @param {Function} handler The method that will be applied
   */
  function addHandle( attrs, handler ) {
  	var arr = attrs.split("|"),
  		i = arr.length;
  
  	while ( i-- ) {
  		Expr.attrHandle[ arr[i] ] = handler;
  	}
  }
  
  /**
   * Checks document order of two siblings
   * @param {Element} a
   * @param {Element} b
   * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
   */
  function siblingCheck( a, b ) {
  	var cur = b && a,
  		diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
  			a.sourceIndex - b.sourceIndex;
  
  	// Use IE sourceIndex if available on both nodes
  	if ( diff ) {
  		return diff;
  	}
  
  	// Check if b follows a
  	if ( cur ) {
  		while ( (cur = cur.nextSibling) ) {
  			if ( cur === b ) {
  				return -1;
  			}
  		}
  	}
  
  	return a ? 1 : -1;
  }
  
  /**
   * Returns a function to use in pseudos for input types
   * @param {String} type
   */
  function createInputPseudo( type ) {
  	return function( elem ) {
  		var name = elem.nodeName.toLowerCase();
  		return name === "input" && elem.type === type;
  	};
  }
  
  /**
   * Returns a function to use in pseudos for buttons
   * @param {String} type
   */
  function createButtonPseudo( type ) {
  	return function( elem ) {
  		var name = elem.nodeName.toLowerCase();
  		return (name === "input" || name === "button") && elem.type === type;
  	};
  }
  
  /**
   * Returns a function to use in pseudos for :enabled/:disabled
   * @param {Boolean} disabled true for :disabled; false for :enabled
   */
  function createDisabledPseudo( disabled ) {
  
  	// Known :disabled false positives: fieldset[disabled] > legend:nth-of-type(n+2) :can-disable
  	return function( elem ) {
  
  		// Only certain elements can match :enabled or :disabled
  		// https://html.spec.whatwg.org/multipage/scripting.html#selector-enabled
  		// https://html.spec.whatwg.org/multipage/scripting.html#selector-disabled
  		if ( "form" in elem ) {
  
  			// Check for inherited disabledness on relevant non-disabled elements:
  			// * listed form-associated elements in a disabled fieldset
  			//   https://html.spec.whatwg.org/multipage/forms.html#category-listed
  			//   https://html.spec.whatwg.org/multipage/forms.html#concept-fe-disabled
  			// * option elements in a disabled optgroup
  			//   https://html.spec.whatwg.org/multipage/forms.html#concept-option-disabled
  			// All such elements have a "form" property.
  			if ( elem.parentNode && elem.disabled === false ) {
  
  				// Option elements defer to a parent optgroup if present
  				if ( "label" in elem ) {
  					if ( "label" in elem.parentNode ) {
  						return elem.parentNode.disabled === disabled;
  					} else {
  						return elem.disabled === disabled;
  					}
  				}
  
  				// Support: IE 6 - 11
  				// Use the isDisabled shortcut property to check for disabled fieldset ancestors
  				return elem.isDisabled === disabled ||
  
  					// Where there is no isDisabled, check manually
  					/* jshint -W018 */
  					elem.isDisabled !== !disabled &&
  						disabledAncestor( elem ) === disabled;
  			}
  
  			return elem.disabled === disabled;
  
  		// Try to winnow out elements that can't be disabled before trusting the disabled property.
  		// Some victims get caught in our net (label, legend, menu, track), but it shouldn't
  		// even exist on them, let alone have a boolean value.
  		} else if ( "label" in elem ) {
  			return elem.disabled === disabled;
  		}
  
  		// Remaining elements are neither :enabled nor :disabled
  		return false;
  	};
  }
  
  /**
   * Returns a function to use in pseudos for positionals
   * @param {Function} fn
   */
  function createPositionalPseudo( fn ) {
  	return markFunction(function( argument ) {
  		argument = +argument;
  		return markFunction(function( seed, matches ) {
  			var j,
  				matchIndexes = fn( [], seed.length, argument ),
  				i = matchIndexes.length;
  
  			// Match elements found at the specified indexes
  			while ( i-- ) {
  				if ( seed[ (j = matchIndexes[i]) ] ) {
  					seed[j] = !(matches[j] = seed[j]);
  				}
  			}
  		});
  	});
  }
  
  /**
   * Checks a node for validity as a Sizzle context
   * @param {Element|Object=} context
   * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
   */
  function testContext( context ) {
  	return context && typeof context.getElementsByTagName !== "undefined" && context;
  }
  
  // Expose support vars for convenience
  support = Sizzle.support = {};
  
  /**
   * Detects XML nodes
   * @param {Element|Object} elem An element or a document
   * @returns {Boolean} True iff elem is a non-HTML XML node
   */
  isXML = Sizzle.isXML = function( elem ) {
  	// documentElement is verified for cases where it doesn't yet exist
  	// (such as loading iframes in IE - #4833)
  	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
  	return documentElement ? documentElement.nodeName !== "HTML" : false;
  };
  
  /**
   * Sets document-related variables once based on the current document
   * @param {Element|Object} [doc] An element or document object to use to set the document
   * @returns {Object} Returns the current document
   */
  setDocument = Sizzle.setDocument = function( node ) {
  	var hasCompare, subWindow,
  		doc = node ? node.ownerDocument || node : preferredDoc;
  
  	// Return early if doc is invalid or already selected
  	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
  		return document;
  	}
  
  	// Update global variables
  	document = doc;
  	docElem = document.documentElement;
  	documentIsHTML = !isXML( document );
  
  	// Support: IE 9-11, Edge
  	// Accessing iframe documents after unload throws "permission denied" errors (jQuery #13936)
  	if ( preferredDoc !== document &&
  		(subWindow = document.defaultView) && subWindow.top !== subWindow ) {
  
  		// Support: IE 11, Edge
  		if ( subWindow.addEventListener ) {
  			subWindow.addEventListener( "unload", unloadHandler, false );
  
  		// Support: IE 9 - 10 only
  		} else if ( subWindow.attachEvent ) {
  			subWindow.attachEvent( "onunload", unloadHandler );
  		}
  	}
  
  	/* Attributes
  	---------------------------------------------------------------------- */
  
  	// Support: IE<8
  	// Verify that getAttribute really returns attributes and not properties
  	// (excepting IE8 booleans)
  	support.attributes = assert(function( el ) {
  		el.className = "i";
  		return !el.getAttribute("className");
  	});
  
  	/* getElement(s)By*
  	---------------------------------------------------------------------- */
  
  	// Check if getElementsByTagName("*") returns only elements
  	support.getElementsByTagName = assert(function( el ) {
  		el.appendChild( document.createComment("") );
  		return !el.getElementsByTagName("*").length;
  	});
  
  	// Support: IE<9
  	support.getElementsByClassName = rnative.test( document.getElementsByClassName );
  
  	// Support: IE<10
  	// Check if getElementById returns elements by name
  	// The broken getElementById methods don't pick up programmatically-set names,
  	// so use a roundabout getElementsByName test
  	support.getById = assert(function( el ) {
  		docElem.appendChild( el ).id = expando;
  		return !document.getElementsByName || !document.getElementsByName( expando ).length;
  	});
  
  	// ID filter and find
  	if ( support.getById ) {
  		Expr.filter["ID"] = function( id ) {
  			var attrId = id.replace( runescape, funescape );
  			return function( elem ) {
  				return elem.getAttribute("id") === attrId;
  			};
  		};
  		Expr.find["ID"] = function( id, context ) {
  			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
  				var elem = context.getElementById( id );
  				return elem ? [ elem ] : [];
  			}
  		};
  	} else {
  		Expr.filter["ID"] =  function( id ) {
  			var attrId = id.replace( runescape, funescape );
  			return function( elem ) {
  				var node = typeof elem.getAttributeNode !== "undefined" &&
  					elem.getAttributeNode("id");
  				return node && node.value === attrId;
  			};
  		};
  
  		// Support: IE 6 - 7 only
  		// getElementById is not reliable as a find shortcut
  		Expr.find["ID"] = function( id, context ) {
  			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
  				var node, i, elems,
  					elem = context.getElementById( id );
  
  				if ( elem ) {
  
  					// Verify the id attribute
  					node = elem.getAttributeNode("id");
  					if ( node && node.value === id ) {
  						return [ elem ];
  					}
  
  					// Fall back on getElementsByName
  					elems = context.getElementsByName( id );
  					i = 0;
  					while ( (elem = elems[i++]) ) {
  						node = elem.getAttributeNode("id");
  						if ( node && node.value === id ) {
  							return [ elem ];
  						}
  					}
  				}
  
  				return [];
  			}
  		};
  	}
  
  	// Tag
  	Expr.find["TAG"] = support.getElementsByTagName ?
  		function( tag, context ) {
  			if ( typeof context.getElementsByTagName !== "undefined" ) {
  				return context.getElementsByTagName( tag );
  
  			// DocumentFragment nodes don't have gEBTN
  			} else if ( support.qsa ) {
  				return context.querySelectorAll( tag );
  			}
  		} :
  
  		function( tag, context ) {
  			var elem,
  				tmp = [],
  				i = 0,
  				// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
  				results = context.getElementsByTagName( tag );
  
  			// Filter out possible comments
  			if ( tag === "*" ) {
  				while ( (elem = results[i++]) ) {
  					if ( elem.nodeType === 1 ) {
  						tmp.push( elem );
  					}
  				}
  
  				return tmp;
  			}
  			return results;
  		};
  
  	// Class
  	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
  		if ( typeof context.getElementsByClassName !== "undefined" && documentIsHTML ) {
  			return context.getElementsByClassName( className );
  		}
  	};
  
  	/* QSA/matchesSelector
  	---------------------------------------------------------------------- */
  
  	// QSA and matchesSelector support
  
  	// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
  	rbuggyMatches = [];
  
  	// qSa(:focus) reports false when true (Chrome 21)
  	// We allow this because of a bug in IE8/9 that throws an error
  	// whenever `document.activeElement` is accessed on an iframe
  	// So, we allow :focus to pass through QSA all the time to avoid the IE error
  	// See https://bugs.jquery.com/ticket/13378
  	rbuggyQSA = [];
  
  	if ( (support.qsa = rnative.test( document.querySelectorAll )) ) {
  		// Build QSA regex
  		// Regex strategy adopted from Diego Perini
  		assert(function( el ) {
  			// Select is set to empty string on purpose
  			// This is to test IE's treatment of not explicitly
  			// setting a boolean content attribute,
  			// since its presence should be enough
  			// https://bugs.jquery.com/ticket/12359
  			docElem.appendChild( el ).innerHTML = "<a id='" + expando + "'></a>" +
  				"<select id='" + expando + "-\r\\' msallowcapture=''>" +
  				"<option selected=''></option></select>";
  
  			// Support: IE8, Opera 11-12.16
  			// Nothing should be selected when empty strings follow ^= or $= or *=
  			// The test attribute must be unknown in Opera but "safe" for WinRT
  			// https://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
  			if ( el.querySelectorAll("[msallowcapture^='']").length ) {
  				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
  			}
  
  			// Support: IE8
  			// Boolean attributes and "value" are not treated correctly
  			if ( !el.querySelectorAll("[selected]").length ) {
  				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
  			}
  
  			// Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+
  			if ( !el.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
  				rbuggyQSA.push("~=");
  			}
  
  			// Webkit/Opera - :checked should return selected option elements
  			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
  			// IE8 throws error here and will not see later tests
  			if ( !el.querySelectorAll(":checked").length ) {
  				rbuggyQSA.push(":checked");
  			}
  
  			// Support: Safari 8+, iOS 8+
  			// https://bugs.webkit.org/show_bug.cgi?id=136851
  			// In-page `selector#id sibling-combinator selector` fails
  			if ( !el.querySelectorAll( "a#" + expando + "+*" ).length ) {
  				rbuggyQSA.push(".#.+[+~]");
  			}
  		});
  
  		assert(function( el ) {
  			el.innerHTML = "<a href='' disabled='disabled'></a>" +
  				"<select disabled='disabled'><option/></select>";
  
  			// Support: Windows 8 Native Apps
  			// The type and name attributes are restricted during .innerHTML assignment
  			var input = document.createElement("input");
  			input.setAttribute( "type", "hidden" );
  			el.appendChild( input ).setAttribute( "name", "D" );
  
  			// Support: IE8
  			// Enforce case-sensitivity of name attribute
  			if ( el.querySelectorAll("[name=d]").length ) {
  				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
  			}
  
  			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
  			// IE8 throws error here and will not see later tests
  			if ( el.querySelectorAll(":enabled").length !== 2 ) {
  				rbuggyQSA.push( ":enabled", ":disabled" );
  			}
  
  			// Support: IE9-11+
  			// IE's :disabled selector does not pick up the children of disabled fieldsets
  			docElem.appendChild( el ).disabled = true;
  			if ( el.querySelectorAll(":disabled").length !== 2 ) {
  				rbuggyQSA.push( ":enabled", ":disabled" );
  			}
  
  			// Opera 10-11 does not throw on post-comma invalid pseudos
  			el.querySelectorAll("*,:x");
  			rbuggyQSA.push(",.*:");
  		});
  	}
  
  	if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
  		docElem.webkitMatchesSelector ||
  		docElem.mozMatchesSelector ||
  		docElem.oMatchesSelector ||
  		docElem.msMatchesSelector) )) ) {
  
  		assert(function( el ) {
  			// Check to see if it's possible to do matchesSelector
  			// on a disconnected node (IE 9)
  			support.disconnectedMatch = matches.call( el, "*" );
  
  			// This should fail with an exception
  			// Gecko does not error, returns false instead
  			matches.call( el, "[s!='']:x" );
  			rbuggyMatches.push( "!=", pseudos );
  		});
  	}
  
  	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
  	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
  
  	/* Contains
  	---------------------------------------------------------------------- */
  	hasCompare = rnative.test( docElem.compareDocumentPosition );
  
  	// Element contains another
  	// Purposefully self-exclusive
  	// As in, an element does not contain itself
  	contains = hasCompare || rnative.test( docElem.contains ) ?
  		function( a, b ) {
  			var adown = a.nodeType === 9 ? a.documentElement : a,
  				bup = b && b.parentNode;
  			return a === bup || !!( bup && bup.nodeType === 1 && (
  				adown.contains ?
  					adown.contains( bup ) :
  					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
  			));
  		} :
  		function( a, b ) {
  			if ( b ) {
  				while ( (b = b.parentNode) ) {
  					if ( b === a ) {
  						return true;
  					}
  				}
  			}
  			return false;
  		};
  
  	/* Sorting
  	---------------------------------------------------------------------- */
  
  	// Document order sorting
  	sortOrder = hasCompare ?
  	function( a, b ) {
  
  		// Flag for duplicate removal
  		if ( a === b ) {
  			hasDuplicate = true;
  			return 0;
  		}
  
  		// Sort on method existence if only one input has compareDocumentPosition
  		var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
  		if ( compare ) {
  			return compare;
  		}
  
  		// Calculate position if both inputs belong to the same document
  		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
  			a.compareDocumentPosition( b ) :
  
  			// Otherwise we know they are disconnected
  			1;
  
  		// Disconnected nodes
  		if ( compare & 1 ||
  			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
  
  			// Choose the first element that is related to our preferred document
  			if ( a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
  				return -1;
  			}
  			if ( b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
  				return 1;
  			}
  
  			// Maintain original order
  			return sortInput ?
  				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
  				0;
  		}
  
  		return compare & 4 ? -1 : 1;
  	} :
  	function( a, b ) {
  		// Exit early if the nodes are identical
  		if ( a === b ) {
  			hasDuplicate = true;
  			return 0;
  		}
  
  		var cur,
  			i = 0,
  			aup = a.parentNode,
  			bup = b.parentNode,
  			ap = [ a ],
  			bp = [ b ];
  
  		// Parentless nodes are either documents or disconnected
  		if ( !aup || !bup ) {
  			return a === document ? -1 :
  				b === document ? 1 :
  				aup ? -1 :
  				bup ? 1 :
  				sortInput ?
  				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
  				0;
  
  		// If the nodes are siblings, we can do a quick check
  		} else if ( aup === bup ) {
  			return siblingCheck( a, b );
  		}
  
  		// Otherwise we need full lists of their ancestors for comparison
  		cur = a;
  		while ( (cur = cur.parentNode) ) {
  			ap.unshift( cur );
  		}
  		cur = b;
  		while ( (cur = cur.parentNode) ) {
  			bp.unshift( cur );
  		}
  
  		// Walk down the tree looking for a discrepancy
  		while ( ap[i] === bp[i] ) {
  			i++;
  		}
  
  		return i ?
  			// Do a sibling check if the nodes have a common ancestor
  			siblingCheck( ap[i], bp[i] ) :
  
  			// Otherwise nodes in our document sort first
  			ap[i] === preferredDoc ? -1 :
  			bp[i] === preferredDoc ? 1 :
  			0;
  	};
  
  	return document;
  };
  
  Sizzle.matches = function( expr, elements ) {
  	return Sizzle( expr, null, null, elements );
  };
  
  Sizzle.matchesSelector = function( elem, expr ) {
  	// Set document vars if needed
  	if ( ( elem.ownerDocument || elem ) !== document ) {
  		setDocument( elem );
  	}
  
  	// Make sure that attribute selectors are quoted
  	expr = expr.replace( rattributeQuotes, "='$1']" );
  
  	if ( support.matchesSelector && documentIsHTML &&
  		!compilerCache[ expr + " " ] &&
  		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
  		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {
  
  		try {
  			var ret = matches.call( elem, expr );
  
  			// IE 9's matchesSelector returns false on disconnected nodes
  			if ( ret || support.disconnectedMatch ||
  					// As well, disconnected nodes are said to be in a document
  					// fragment in IE 9
  					elem.document && elem.document.nodeType !== 11 ) {
  				return ret;
  			}
  		} catch (e) {}
  	}
  
  	return Sizzle( expr, document, null, [ elem ] ).length > 0;
  };
  
  Sizzle.contains = function( context, elem ) {
  	// Set document vars if needed
  	if ( ( context.ownerDocument || context ) !== document ) {
  		setDocument( context );
  	}
  	return contains( context, elem );
  };
  
  Sizzle.attr = function( elem, name ) {
  	// Set document vars if needed
  	if ( ( elem.ownerDocument || elem ) !== document ) {
  		setDocument( elem );
  	}
  
  	var fn = Expr.attrHandle[ name.toLowerCase() ],
  		// Don't get fooled by Object.prototype properties (jQuery #13807)
  		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
  			fn( elem, name, !documentIsHTML ) :
  			undefined;
  
  	return val !== undefined ?
  		val :
  		support.attributes || !documentIsHTML ?
  			elem.getAttribute( name ) :
  			(val = elem.getAttributeNode(name)) && val.specified ?
  				val.value :
  				null;
  };
  
  Sizzle.escape = function( sel ) {
  	return (sel + "").replace( rcssescape, fcssescape );
  };
  
  Sizzle.error = function( msg ) {
  	throw new Error( "Syntax error, unrecognized expression: " + msg );
  };
  
  /**
   * Document sorting and removing duplicates
   * @param {ArrayLike} results
   */
  Sizzle.uniqueSort = function( results ) {
  	var elem,
  		duplicates = [],
  		j = 0,
  		i = 0;
  
  	// Unless we *know* we can detect duplicates, assume their presence
  	hasDuplicate = !support.detectDuplicates;
  	sortInput = !support.sortStable && results.slice( 0 );
  	results.sort( sortOrder );
  
  	if ( hasDuplicate ) {
  		while ( (elem = results[i++]) ) {
  			if ( elem === results[ i ] ) {
  				j = duplicates.push( i );
  			}
  		}
  		while ( j-- ) {
  			results.splice( duplicates[ j ], 1 );
  		}
  	}
  
  	// Clear input after sorting to release objects
  	// See https://github.com/jquery/sizzle/pull/225
  	sortInput = null;
  
  	return results;
  };
  
  /**
   * Utility function for retrieving the text value of an array of DOM nodes
   * @param {Array|Element} elem
   */
  getText = Sizzle.getText = function( elem ) {
  	var node,
  		ret = "",
  		i = 0,
  		nodeType = elem.nodeType;
  
  	if ( !nodeType ) {
  		// If no nodeType, this is expected to be an array
  		while ( (node = elem[i++]) ) {
  			// Do not traverse comment nodes
  			ret += getText( node );
  		}
  	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
  		// Use textContent for elements
  		// innerText usage removed for consistency of new lines (jQuery #11153)
  		if ( typeof elem.textContent === "string" ) {
  			return elem.textContent;
  		} else {
  			// Traverse its children
  			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
  				ret += getText( elem );
  			}
  		}
  	} else if ( nodeType === 3 || nodeType === 4 ) {
  		return elem.nodeValue;
  	}
  	// Do not include comment or processing instruction nodes
  
  	return ret;
  };
  
  Expr = Sizzle.selectors = {
  
  	// Can be adjusted by the user
  	cacheLength: 50,
  
  	createPseudo: markFunction,
  
  	match: matchExpr,
  
  	attrHandle: {},
  
  	find: {},
  
  	relative: {
  		">": { dir: "parentNode", first: true },
  		" ": { dir: "parentNode" },
  		"+": { dir: "previousSibling", first: true },
  		"~": { dir: "previousSibling" }
  	},
  
  	preFilter: {
  		"ATTR": function( match ) {
  			match[1] = match[1].replace( runescape, funescape );
  
  			// Move the given value to match[3] whether quoted or unquoted
  			match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );
  
  			if ( match[2] === "~=" ) {
  				match[3] = " " + match[3] + " ";
  			}
  
  			return match.slice( 0, 4 );
  		},
  
  		"CHILD": function( match ) {
  			/* matches from matchExpr["CHILD"]
  				1 type (only|nth|...)
  				2 what (child|of-type)
  				3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
  				4 xn-component of xn+y argument ([+-]?\d*n|)
  				5 sign of xn-component
  				6 x of xn-component
  				7 sign of y-component
  				8 y of y-component
  			*/
  			match[1] = match[1].toLowerCase();
  
  			if ( match[1].slice( 0, 3 ) === "nth" ) {
  				// nth-* requires argument
  				if ( !match[3] ) {
  					Sizzle.error( match[0] );
  				}
  
  				// numeric x and y parameters for Expr.filter.CHILD
  				// remember that false/true cast respectively to 0/1
  				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
  				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
  
  			// other types prohibit arguments
  			} else if ( match[3] ) {
  				Sizzle.error( match[0] );
  			}
  
  			return match;
  		},
  
  		"PSEUDO": function( match ) {
  			var excess,
  				unquoted = !match[6] && match[2];
  
  			if ( matchExpr["CHILD"].test( match[0] ) ) {
  				return null;
  			}
  
  			// Accept quoted arguments as-is
  			if ( match[3] ) {
  				match[2] = match[4] || match[5] || "";
  
  			// Strip excess characters from unquoted arguments
  			} else if ( unquoted && rpseudo.test( unquoted ) &&
  				// Get excess from tokenize (recursively)
  				(excess = tokenize( unquoted, true )) &&
  				// advance to the next closing parenthesis
  				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
  
  				// excess is a negative index
  				match[0] = match[0].slice( 0, excess );
  				match[2] = unquoted.slice( 0, excess );
  			}
  
  			// Return only captures needed by the pseudo filter method (type and argument)
  			return match.slice( 0, 3 );
  		}
  	},
  
  	filter: {
  
  		"TAG": function( nodeNameSelector ) {
  			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
  			return nodeNameSelector === "*" ?
  				function() { return true; } :
  				function( elem ) {
  					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
  				};
  		},
  
  		"CLASS": function( className ) {
  			var pattern = classCache[ className + " " ];
  
  			return pattern ||
  				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
  				classCache( className, function( elem ) {
  					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
  				});
  		},
  
  		"ATTR": function( name, operator, check ) {
  			return function( elem ) {
  				var result = Sizzle.attr( elem, name );
  
  				if ( result == null ) {
  					return operator === "!=";
  				}
  				if ( !operator ) {
  					return true;
  				}
  
  				result += "";
  
  				return operator === "=" ? result === check :
  					operator === "!=" ? result !== check :
  					operator === "^=" ? check && result.indexOf( check ) === 0 :
  					operator === "*=" ? check && result.indexOf( check ) > -1 :
  					operator === "$=" ? check && result.slice( -check.length ) === check :
  					operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
  					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
  					false;
  			};
  		},
  
  		"CHILD": function( type, what, argument, first, last ) {
  			var simple = type.slice( 0, 3 ) !== "nth",
  				forward = type.slice( -4 ) !== "last",
  				ofType = what === "of-type";
  
  			return first === 1 && last === 0 ?
  
  				// Shortcut for :nth-*(n)
  				function( elem ) {
  					return !!elem.parentNode;
  				} :
  
  				function( elem, context, xml ) {
  					var cache, uniqueCache, outerCache, node, nodeIndex, start,
  						dir = simple !== forward ? "nextSibling" : "previousSibling",
  						parent = elem.parentNode,
  						name = ofType && elem.nodeName.toLowerCase(),
  						useCache = !xml && !ofType,
  						diff = false;
  
  					if ( parent ) {
  
  						// :(first|last|only)-(child|of-type)
  						if ( simple ) {
  							while ( dir ) {
  								node = elem;
  								while ( (node = node[ dir ]) ) {
  									if ( ofType ?
  										node.nodeName.toLowerCase() === name :
  										node.nodeType === 1 ) {
  
  										return false;
  									}
  								}
  								// Reverse direction for :only-* (if we haven't yet done so)
  								start = dir = type === "only" && !start && "nextSibling";
  							}
  							return true;
  						}
  
  						start = [ forward ? parent.firstChild : parent.lastChild ];
  
  						// non-xml :nth-child(...) stores cache data on `parent`
  						if ( forward && useCache ) {
  
  							// Seek `elem` from a previously-cached index
  
  							// ...in a gzip-friendly way
  							node = parent;
  							outerCache = node[ expando ] || (node[ expando ] = {});
  
  							// Support: IE <9 only
  							// Defend against cloned attroperties (jQuery gh-1709)
  							uniqueCache = outerCache[ node.uniqueID ] ||
  								(outerCache[ node.uniqueID ] = {});
  
  							cache = uniqueCache[ type ] || [];
  							nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
  							diff = nodeIndex && cache[ 2 ];
  							node = nodeIndex && parent.childNodes[ nodeIndex ];
  
  							while ( (node = ++nodeIndex && node && node[ dir ] ||
  
  								// Fallback to seeking `elem` from the start
  								(diff = nodeIndex = 0) || start.pop()) ) {
  
  								// When found, cache indexes on `parent` and break
  								if ( node.nodeType === 1 && ++diff && node === elem ) {
  									uniqueCache[ type ] = [ dirruns, nodeIndex, diff ];
  									break;
  								}
  							}
  
  						} else {
  							// Use previously-cached element index if available
  							if ( useCache ) {
  								// ...in a gzip-friendly way
  								node = elem;
  								outerCache = node[ expando ] || (node[ expando ] = {});
  
  								// Support: IE <9 only
  								// Defend against cloned attroperties (jQuery gh-1709)
  								uniqueCache = outerCache[ node.uniqueID ] ||
  									(outerCache[ node.uniqueID ] = {});
  
  								cache = uniqueCache[ type ] || [];
  								nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
  								diff = nodeIndex;
  							}
  
  							// xml :nth-child(...)
  							// or :nth-last-child(...) or :nth(-last)?-of-type(...)
  							if ( diff === false ) {
  								// Use the same loop as above to seek `elem` from the start
  								while ( (node = ++nodeIndex && node && node[ dir ] ||
  									(diff = nodeIndex = 0) || start.pop()) ) {
  
  									if ( ( ofType ?
  										node.nodeName.toLowerCase() === name :
  										node.nodeType === 1 ) &&
  										++diff ) {
  
  										// Cache the index of each encountered element
  										if ( useCache ) {
  											outerCache = node[ expando ] || (node[ expando ] = {});
  
  											// Support: IE <9 only
  											// Defend against cloned attroperties (jQuery gh-1709)
  											uniqueCache = outerCache[ node.uniqueID ] ||
  												(outerCache[ node.uniqueID ] = {});
  
  											uniqueCache[ type ] = [ dirruns, diff ];
  										}
  
  										if ( node === elem ) {
  											break;
  										}
  									}
  								}
  							}
  						}
  
  						// Incorporate the offset, then check against cycle size
  						diff -= last;
  						return diff === first || ( diff % first === 0 && diff / first >= 0 );
  					}
  				};
  		},
  
  		"PSEUDO": function( pseudo, argument ) {
  			// pseudo-class names are case-insensitive
  			// http://www.w3.org/TR/selectors/#pseudo-classes
  			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
  			// Remember that setFilters inherits from pseudos
  			var args,
  				fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
  					Sizzle.error( "unsupported pseudo: " + pseudo );
  
  			// The user may use createPseudo to indicate that
  			// arguments are needed to create the filter function
  			// just as Sizzle does
  			if ( fn[ expando ] ) {
  				return fn( argument );
  			}
  
  			// But maintain support for old signatures
  			if ( fn.length > 1 ) {
  				args = [ pseudo, pseudo, "", argument ];
  				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
  					markFunction(function( seed, matches ) {
  						var idx,
  							matched = fn( seed, argument ),
  							i = matched.length;
  						while ( i-- ) {
  							idx = indexOf( seed, matched[i] );
  							seed[ idx ] = !( matches[ idx ] = matched[i] );
  						}
  					}) :
  					function( elem ) {
  						return fn( elem, 0, args );
  					};
  			}
  
  			return fn;
  		}
  	},
  
  	pseudos: {
  		// Potentially complex pseudos
  		"not": markFunction(function( selector ) {
  			// Trim the selector passed to compile
  			// to avoid treating leading and trailing
  			// spaces as combinators
  			var input = [],
  				results = [],
  				matcher = compile( selector.replace( rtrim, "$1" ) );
  
  			return matcher[ expando ] ?
  				markFunction(function( seed, matches, context, xml ) {
  					var elem,
  						unmatched = matcher( seed, null, xml, [] ),
  						i = seed.length;
  
  					// Match elements unmatched by `matcher`
  					while ( i-- ) {
  						if ( (elem = unmatched[i]) ) {
  							seed[i] = !(matches[i] = elem);
  						}
  					}
  				}) :
  				function( elem, context, xml ) {
  					input[0] = elem;
  					matcher( input, null, xml, results );
  					// Don't keep the element (issue #299)
  					input[0] = null;
  					return !results.pop();
  				};
  		}),
  
  		"has": markFunction(function( selector ) {
  			return function( elem ) {
  				return Sizzle( selector, elem ).length > 0;
  			};
  		}),
  
  		"contains": markFunction(function( text ) {
  			text = text.replace( runescape, funescape );
  			return function( elem ) {
  				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
  			};
  		}),
  
  		// "Whether an element is represented by a :lang() selector
  		// is based solely on the element's language value
  		// being equal to the identifier C,
  		// or beginning with the identifier C immediately followed by "-".
  		// The matching of C against the element's language value is performed case-insensitively.
  		// The identifier C does not have to be a valid language name."
  		// http://www.w3.org/TR/selectors/#lang-pseudo
  		"lang": markFunction( function( lang ) {
  			// lang value must be a valid identifier
  			if ( !ridentifier.test(lang || "") ) {
  				Sizzle.error( "unsupported lang: " + lang );
  			}
  			lang = lang.replace( runescape, funescape ).toLowerCase();
  			return function( elem ) {
  				var elemLang;
  				do {
  					if ( (elemLang = documentIsHTML ?
  						elem.lang :
  						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
  
  						elemLang = elemLang.toLowerCase();
  						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
  					}
  				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
  				return false;
  			};
  		}),
  
  		// Miscellaneous
  		"target": function( elem ) {
  			var hash = window.location && window.location.hash;
  			return hash && hash.slice( 1 ) === elem.id;
  		},
  
  		"root": function( elem ) {
  			return elem === docElem;
  		},
  
  		"focus": function( elem ) {
  			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
  		},
  
  		// Boolean properties
  		"enabled": createDisabledPseudo( false ),
  		"disabled": createDisabledPseudo( true ),
  
  		"checked": function( elem ) {
  			// In CSS3, :checked should return both checked and selected elements
  			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
  			var nodeName = elem.nodeName.toLowerCase();
  			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
  		},
  
  		"selected": function( elem ) {
  			// Accessing this property makes selected-by-default
  			// options in Safari work properly
  			if ( elem.parentNode ) {
  				elem.parentNode.selectedIndex;
  			}
  
  			return elem.selected === true;
  		},
  
  		// Contents
  		"empty": function( elem ) {
  			// http://www.w3.org/TR/selectors/#empty-pseudo
  			// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
  			//   but not by others (comment: 8; processing instruction: 7; etc.)
  			// nodeType < 6 works because attributes (2) do not appear as children
  			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
  				if ( elem.nodeType < 6 ) {
  					return false;
  				}
  			}
  			return true;
  		},
  
  		"parent": function( elem ) {
  			return !Expr.pseudos["empty"]( elem );
  		},
  
  		// Element/input types
  		"header": function( elem ) {
  			return rheader.test( elem.nodeName );
  		},
  
  		"input": function( elem ) {
  			return rinputs.test( elem.nodeName );
  		},
  
  		"button": function( elem ) {
  			var name = elem.nodeName.toLowerCase();
  			return name === "input" && elem.type === "button" || name === "button";
  		},
  
  		"text": function( elem ) {
  			var attr;
  			return elem.nodeName.toLowerCase() === "input" &&
  				elem.type === "text" &&
  
  				// Support: IE<8
  				// New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
  				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
  		},
  
  		// Position-in-collection
  		"first": createPositionalPseudo(function() {
  			return [ 0 ];
  		}),
  
  		"last": createPositionalPseudo(function( matchIndexes, length ) {
  			return [ length - 1 ];
  		}),
  
  		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
  			return [ argument < 0 ? argument + length : argument ];
  		}),
  
  		"even": createPositionalPseudo(function( matchIndexes, length ) {
  			var i = 0;
  			for ( ; i < length; i += 2 ) {
  				matchIndexes.push( i );
  			}
  			return matchIndexes;
  		}),
  
  		"odd": createPositionalPseudo(function( matchIndexes, length ) {
  			var i = 1;
  			for ( ; i < length; i += 2 ) {
  				matchIndexes.push( i );
  			}
  			return matchIndexes;
  		}),
  
  		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
  			var i = argument < 0 ? argument + length : argument;
  			for ( ; --i >= 0; ) {
  				matchIndexes.push( i );
  			}
  			return matchIndexes;
  		}),
  
  		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
  			var i = argument < 0 ? argument + length : argument;
  			for ( ; ++i < length; ) {
  				matchIndexes.push( i );
  			}
  			return matchIndexes;
  		})
  	}
  };
  
  Expr.pseudos["nth"] = Expr.pseudos["eq"];
  
  // Add button/input type pseudos
  for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
  	Expr.pseudos[ i ] = createInputPseudo( i );
  }
  for ( i in { submit: true, reset: true } ) {
  	Expr.pseudos[ i ] = createButtonPseudo( i );
  }
  
  // Easy API for creating new setFilters
  function setFilters() {}
  setFilters.prototype = Expr.filters = Expr.pseudos;
  Expr.setFilters = new setFilters();
  
  tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
  	var matched, match, tokens, type,
  		soFar, groups, preFilters,
  		cached = tokenCache[ selector + " " ];
  
  	if ( cached ) {
  		return parseOnly ? 0 : cached.slice( 0 );
  	}
  
  	soFar = selector;
  	groups = [];
  	preFilters = Expr.preFilter;
  
  	while ( soFar ) {
  
  		// Comma and first run
  		if ( !matched || (match = rcomma.exec( soFar )) ) {
  			if ( match ) {
  				// Don't consume trailing commas as valid
  				soFar = soFar.slice( match[0].length ) || soFar;
  			}
  			groups.push( (tokens = []) );
  		}
  
  		matched = false;
  
  		// Combinators
  		if ( (match = rcombinators.exec( soFar )) ) {
  			matched = match.shift();
  			tokens.push({
  				value: matched,
  				// Cast descendant combinators to space
  				type: match[0].replace( rtrim, " " )
  			});
  			soFar = soFar.slice( matched.length );
  		}
  
  		// Filters
  		for ( type in Expr.filter ) {
  			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
  				(match = preFilters[ type ]( match ))) ) {
  				matched = match.shift();
  				tokens.push({
  					value: matched,
  					type: type,
  					matches: match
  				});
  				soFar = soFar.slice( matched.length );
  			}
  		}
  
  		if ( !matched ) {
  			break;
  		}
  	}
  
  	// Return the length of the invalid excess
  	// if we're just parsing
  	// Otherwise, throw an error or return tokens
  	return parseOnly ?
  		soFar.length :
  		soFar ?
  			Sizzle.error( selector ) :
  			// Cache the tokens
  			tokenCache( selector, groups ).slice( 0 );
  };
  
  function toSelector( tokens ) {
  	var i = 0,
  		len = tokens.length,
  		selector = "";
  	for ( ; i < len; i++ ) {
  		selector += tokens[i].value;
  	}
  	return selector;
  }
  
  function addCombinator( matcher, combinator, base ) {
  	var dir = combinator.dir,
  		skip = combinator.next,
  		key = skip || dir,
  		checkNonElements = base && key === "parentNode",
  		doneName = done++;
  
  	return combinator.first ?
  		// Check against closest ancestor/preceding element
  		function( elem, context, xml ) {
  			while ( (elem = elem[ dir ]) ) {
  				if ( elem.nodeType === 1 || checkNonElements ) {
  					return matcher( elem, context, xml );
  				}
  			}
  			return false;
  		} :
  
  		// Check against all ancestor/preceding elements
  		function( elem, context, xml ) {
  			var oldCache, uniqueCache, outerCache,
  				newCache = [ dirruns, doneName ];
  
  			// We can't set arbitrary data on XML nodes, so they don't benefit from combinator caching
  			if ( xml ) {
  				while ( (elem = elem[ dir ]) ) {
  					if ( elem.nodeType === 1 || checkNonElements ) {
  						if ( matcher( elem, context, xml ) ) {
  							return true;
  						}
  					}
  				}
  			} else {
  				while ( (elem = elem[ dir ]) ) {
  					if ( elem.nodeType === 1 || checkNonElements ) {
  						outerCache = elem[ expando ] || (elem[ expando ] = {});
  
  						// Support: IE <9 only
  						// Defend against cloned attroperties (jQuery gh-1709)
  						uniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});
  
  						if ( skip && skip === elem.nodeName.toLowerCase() ) {
  							elem = elem[ dir ] || elem;
  						} else if ( (oldCache = uniqueCache[ key ]) &&
  							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
  
  							// Assign to newCache so results back-propagate to previous elements
  							return (newCache[ 2 ] = oldCache[ 2 ]);
  						} else {
  							// Reuse newcache so results back-propagate to previous elements
  							uniqueCache[ key ] = newCache;
  
  							// A match means we're done; a fail means we have to keep checking
  							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
  								return true;
  							}
  						}
  					}
  				}
  			}
  			return false;
  		};
  }
  
  function elementMatcher( matchers ) {
  	return matchers.length > 1 ?
  		function( elem, context, xml ) {
  			var i = matchers.length;
  			while ( i-- ) {
  				if ( !matchers[i]( elem, context, xml ) ) {
  					return false;
  				}
  			}
  			return true;
  		} :
  		matchers[0];
  }
  
  function multipleContexts( selector, contexts, results ) {
  	var i = 0,
  		len = contexts.length;
  	for ( ; i < len; i++ ) {
  		Sizzle( selector, contexts[i], results );
  	}
  	return results;
  }
  
  function condense( unmatched, map, filter, context, xml ) {
  	var elem,
  		newUnmatched = [],
  		i = 0,
  		len = unmatched.length,
  		mapped = map != null;
  
  	for ( ; i < len; i++ ) {
  		if ( (elem = unmatched[i]) ) {
  			if ( !filter || filter( elem, context, xml ) ) {
  				newUnmatched.push( elem );
  				if ( mapped ) {
  					map.push( i );
  				}
  			}
  		}
  	}
  
  	return newUnmatched;
  }
  
  function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
  	if ( postFilter && !postFilter[ expando ] ) {
  		postFilter = setMatcher( postFilter );
  	}
  	if ( postFinder && !postFinder[ expando ] ) {
  		postFinder = setMatcher( postFinder, postSelector );
  	}
  	return markFunction(function( seed, results, context, xml ) {
  		var temp, i, elem,
  			preMap = [],
  			postMap = [],
  			preexisting = results.length,
  
  			// Get initial elements from seed or context
  			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
  
  			// Prefilter to get matcher input, preserving a map for seed-results synchronization
  			matcherIn = preFilter && ( seed || !selector ) ?
  				condense( elems, preMap, preFilter, context, xml ) :
  				elems,
  
  			matcherOut = matcher ?
  				// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
  				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
  
  					// ...intermediate processing is necessary
  					[] :
  
  					// ...otherwise use results directly
  					results :
  				matcherIn;
  
  		// Find primary matches
  		if ( matcher ) {
  			matcher( matcherIn, matcherOut, context, xml );
  		}
  
  		// Apply postFilter
  		if ( postFilter ) {
  			temp = condense( matcherOut, postMap );
  			postFilter( temp, [], context, xml );
  
  			// Un-match failing elements by moving them back to matcherIn
  			i = temp.length;
  			while ( i-- ) {
  				if ( (elem = temp[i]) ) {
  					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
  				}
  			}
  		}
  
  		if ( seed ) {
  			if ( postFinder || preFilter ) {
  				if ( postFinder ) {
  					// Get the final matcherOut by condensing this intermediate into postFinder contexts
  					temp = [];
  					i = matcherOut.length;
  					while ( i-- ) {
  						if ( (elem = matcherOut[i]) ) {
  							// Restore matcherIn since elem is not yet a final match
  							temp.push( (matcherIn[i] = elem) );
  						}
  					}
  					postFinder( null, (matcherOut = []), temp, xml );
  				}
  
  				// Move matched elements from seed to results to keep them synchronized
  				i = matcherOut.length;
  				while ( i-- ) {
  					if ( (elem = matcherOut[i]) &&
  						(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {
  
  						seed[temp] = !(results[temp] = elem);
  					}
  				}
  			}
  
  		// Add elements to results, through postFinder if defined
  		} else {
  			matcherOut = condense(
  				matcherOut === results ?
  					matcherOut.splice( preexisting, matcherOut.length ) :
  					matcherOut
  			);
  			if ( postFinder ) {
  				postFinder( null, results, matcherOut, xml );
  			} else {
  				push.apply( results, matcherOut );
  			}
  		}
  	});
  }
  
  function matcherFromTokens( tokens ) {
  	var checkContext, matcher, j,
  		len = tokens.length,
  		leadingRelative = Expr.relative[ tokens[0].type ],
  		implicitRelative = leadingRelative || Expr.relative[" "],
  		i = leadingRelative ? 1 : 0,
  
  		// The foundational matcher ensures that elements are reachable from top-level context(s)
  		matchContext = addCombinator( function( elem ) {
  			return elem === checkContext;
  		}, implicitRelative, true ),
  		matchAnyContext = addCombinator( function( elem ) {
  			return indexOf( checkContext, elem ) > -1;
  		}, implicitRelative, true ),
  		matchers = [ function( elem, context, xml ) {
  			var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
  				(checkContext = context).nodeType ?
  					matchContext( elem, context, xml ) :
  					matchAnyContext( elem, context, xml ) );
  			// Avoid hanging onto element (issue #299)
  			checkContext = null;
  			return ret;
  		} ];
  
  	for ( ; i < len; i++ ) {
  		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
  			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
  		} else {
  			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
  
  			// Return special upon seeing a positional matcher
  			if ( matcher[ expando ] ) {
  				// Find the next relative operator (if any) for proper handling
  				j = ++i;
  				for ( ; j < len; j++ ) {
  					if ( Expr.relative[ tokens[j].type ] ) {
  						break;
  					}
  				}
  				return setMatcher(
  					i > 1 && elementMatcher( matchers ),
  					i > 1 && toSelector(
  						// If the preceding token was a descendant combinator, insert an implicit any-element `*`
  						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
  					).replace( rtrim, "$1" ),
  					matcher,
  					i < j && matcherFromTokens( tokens.slice( i, j ) ),
  					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
  					j < len && toSelector( tokens )
  				);
  			}
  			matchers.push( matcher );
  		}
  	}
  
  	return elementMatcher( matchers );
  }
  
  function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
  	var bySet = setMatchers.length > 0,
  		byElement = elementMatchers.length > 0,
  		superMatcher = function( seed, context, xml, results, outermost ) {
  			var elem, j, matcher,
  				matchedCount = 0,
  				i = "0",
  				unmatched = seed && [],
  				setMatched = [],
  				contextBackup = outermostContext,
  				// We must always have either seed elements or outermost context
  				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
  				// Use integer dirruns iff this is the outermost matcher
  				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
  				len = elems.length;
  
  			if ( outermost ) {
  				outermostContext = context === document || context || outermost;
  			}
  
  			// Add elements passing elementMatchers directly to results
  			// Support: IE<9, Safari
  			// Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
  			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
  				if ( byElement && elem ) {
  					j = 0;
  					if ( !context && elem.ownerDocument !== document ) {
  						setDocument( elem );
  						xml = !documentIsHTML;
  					}
  					while ( (matcher = elementMatchers[j++]) ) {
  						if ( matcher( elem, context || document, xml) ) {
  							results.push( elem );
  							break;
  						}
  					}
  					if ( outermost ) {
  						dirruns = dirrunsUnique;
  					}
  				}
  
  				// Track unmatched elements for set filters
  				if ( bySet ) {
  					// They will have gone through all possible matchers
  					if ( (elem = !matcher && elem) ) {
  						matchedCount--;
  					}
  
  					// Lengthen the array for every element, matched or not
  					if ( seed ) {
  						unmatched.push( elem );
  					}
  				}
  			}
  
  			// `i` is now the count of elements visited above, and adding it to `matchedCount`
  			// makes the latter nonnegative.
  			matchedCount += i;
  
  			// Apply set filters to unmatched elements
  			// NOTE: This can be skipped if there are no unmatched elements (i.e., `matchedCount`
  			// equals `i`), unless we didn't visit _any_ elements in the above loop because we have
  			// no element matchers and no seed.
  			// Incrementing an initially-string "0" `i` allows `i` to remain a string only in that
  			// case, which will result in a "00" `matchedCount` that differs from `i` but is also
  			// numerically zero.
  			if ( bySet && i !== matchedCount ) {
  				j = 0;
  				while ( (matcher = setMatchers[j++]) ) {
  					matcher( unmatched, setMatched, context, xml );
  				}
  
  				if ( seed ) {
  					// Reintegrate element matches to eliminate the need for sorting
  					if ( matchedCount > 0 ) {
  						while ( i-- ) {
  							if ( !(unmatched[i] || setMatched[i]) ) {
  								setMatched[i] = pop.call( results );
  							}
  						}
  					}
  
  					// Discard index placeholder values to get only actual matches
  					setMatched = condense( setMatched );
  				}
  
  				// Add matches to results
  				push.apply( results, setMatched );
  
  				// Seedless set matches succeeding multiple successful matchers stipulate sorting
  				if ( outermost && !seed && setMatched.length > 0 &&
  					( matchedCount + setMatchers.length ) > 1 ) {
  
  					Sizzle.uniqueSort( results );
  				}
  			}
  
  			// Override manipulation of globals by nested matchers
  			if ( outermost ) {
  				dirruns = dirrunsUnique;
  				outermostContext = contextBackup;
  			}
  
  			return unmatched;
  		};
  
  	return bySet ?
  		markFunction( superMatcher ) :
  		superMatcher;
  }
  
  compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
  	var i,
  		setMatchers = [],
  		elementMatchers = [],
  		cached = compilerCache[ selector + " " ];
  
  	if ( !cached ) {
  		// Generate a function of recursive functions that can be used to check each element
  		if ( !match ) {
  			match = tokenize( selector );
  		}
  		i = match.length;
  		while ( i-- ) {
  			cached = matcherFromTokens( match[i] );
  			if ( cached[ expando ] ) {
  				setMatchers.push( cached );
  			} else {
  				elementMatchers.push( cached );
  			}
  		}
  
  		// Cache the compiled function
  		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
  
  		// Save selector and tokenization
  		cached.selector = selector;
  	}
  	return cached;
  };
  
  /**
   * A low-level selection function that works with Sizzle's compiled
   *  selector functions
   * @param {String|Function} selector A selector or a pre-compiled
   *  selector function built with Sizzle.compile
   * @param {Element} context
   * @param {Array} [results]
   * @param {Array} [seed] A set of elements to match against
   */
  select = Sizzle.select = function( selector, context, results, seed ) {
  	var i, tokens, token, type, find,
  		compiled = typeof selector === "function" && selector,
  		match = !seed && tokenize( (selector = compiled.selector || selector) );
  
  	results = results || [];
  
  	// Try to minimize operations if there is only one selector in the list and no seed
  	// (the latter of which guarantees us context)
  	if ( match.length === 1 ) {
  
  		// Reduce context if the leading compound selector is an ID
  		tokens = match[0] = match[0].slice( 0 );
  		if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
  				context.nodeType === 9 && documentIsHTML && Expr.relative[ tokens[1].type ] ) {
  
  			context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
  			if ( !context ) {
  				return results;
  
  			// Precompiled matchers will still verify ancestry, so step up a level
  			} else if ( compiled ) {
  				context = context.parentNode;
  			}
  
  			selector = selector.slice( tokens.shift().value.length );
  		}
  
  		// Fetch a seed set for right-to-left matching
  		i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
  		while ( i-- ) {
  			token = tokens[i];
  
  			// Abort if we hit a combinator
  			if ( Expr.relative[ (type = token.type) ] ) {
  				break;
  			}
  			if ( (find = Expr.find[ type ]) ) {
  				// Search, expanding context for leading sibling combinators
  				if ( (seed = find(
  					token.matches[0].replace( runescape, funescape ),
  					rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
  				)) ) {
  
  					// If seed is empty or no tokens remain, we can return early
  					tokens.splice( i, 1 );
  					selector = seed.length && toSelector( tokens );
  					if ( !selector ) {
  						push.apply( results, seed );
  						return results;
  					}
  
  					break;
  				}
  			}
  		}
  	}
  
  	// Compile and execute a filtering function if one is not provided
  	// Provide `match` to avoid retokenization if we modified the selector above
  	( compiled || compile( selector, match ) )(
  		seed,
  		context,
  		!documentIsHTML,
  		results,
  		!context || rsibling.test( selector ) && testContext( context.parentNode ) || context
  	);
  	return results;
  };
  
  // One-time assignments
  
  // Sort stability
  support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
  
  // Support: Chrome 14-35+
  // Always assume duplicates if they aren't passed to the comparison function
  support.detectDuplicates = !!hasDuplicate;
  
  // Initialize against the default document
  setDocument();
  
  // Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
  // Detached nodes confoundingly follow *each other*
  support.sortDetached = assert(function( el ) {
  	// Should return 1, but returns 4 (following)
  	return el.compareDocumentPosition( document.createElement("fieldset") ) & 1;
  });
  
  // Support: IE<8
  // Prevent attribute/property "interpolation"
  // https://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
  if ( !assert(function( el ) {
  	el.innerHTML = "<a href='#'></a>";
  	return el.firstChild.getAttribute("href") === "#" ;
  }) ) {
  	addHandle( "type|href|height|width", function( elem, name, isXML ) {
  		if ( !isXML ) {
  			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
  		}
  	});
  }
  
  // Support: IE<9
  // Use defaultValue in place of getAttribute("value")
  if ( !support.attributes || !assert(function( el ) {
  	el.innerHTML = "<input/>";
  	el.firstChild.setAttribute( "value", "" );
  	return el.firstChild.getAttribute( "value" ) === "";
  }) ) {
  	addHandle( "value", function( elem, name, isXML ) {
  		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
  			return elem.defaultValue;
  		}
  	});
  }
  
  // Support: IE<9
  // Use getAttributeNode to fetch booleans when getAttribute lies
  if ( !assert(function( el ) {
  	return el.getAttribute("disabled") == null;
  }) ) {
  	addHandle( booleans, function( elem, name, isXML ) {
  		var val;
  		if ( !isXML ) {
  			return elem[ name ] === true ? name.toLowerCase() :
  					(val = elem.getAttributeNode( name )) && val.specified ?
  					val.value :
  				null;
  		}
  	});
  }
  
  return Sizzle;
  
  })( window );
  
  
  
  jQuery.find = Sizzle;
  jQuery.expr = Sizzle.selectors;
  
  // Deprecated
  jQuery.expr[ ":" ] = jQuery.expr.pseudos;
  jQuery.uniqueSort = jQuery.unique = Sizzle.uniqueSort;
  jQuery.text = Sizzle.getText;
  jQuery.isXMLDoc = Sizzle.isXML;
  jQuery.contains = Sizzle.contains;
  jQuery.escapeSelector = Sizzle.escape;
  
  
  
  
  var dir = function( elem, dir, until ) {
  	var matched = [],
  		truncate = until !== undefined;
  
  	while ( ( elem = elem[ dir ] ) && elem.nodeType !== 9 ) {
  		if ( elem.nodeType === 1 ) {
  			if ( truncate && jQuery( elem ).is( until ) ) {
  				break;
  			}
  			matched.push( elem );
  		}
  	}
  	return matched;
  };
  
  
  var siblings = function( n, elem ) {
  	var matched = [];
  
  	for ( ; n; n = n.nextSibling ) {
  		if ( n.nodeType === 1 && n !== elem ) {
  			matched.push( n );
  		}
  	}
  
  	return matched;
  };
  
  
  var rneedsContext = jQuery.expr.match.needsContext;
  
  
  
  function nodeName( elem, name ) {
  
    return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
  
  };
  var rsingleTag = ( /^<([a-z][^\/\0>:\x20\t\r\n\f]*)[\x20\t\r\n\f]*\/?>(?:<\/\1>|)$/i );
  
  
  
  // Implement the identical functionality for filter and not
  function winnow( elements, qualifier, not ) {
  	if ( isFunction( qualifier ) ) {
  		return jQuery.grep( elements, function( elem, i ) {
  			return !!qualifier.call( elem, i, elem ) !== not;
  		} );
  	}
  
  	// Single element
  	if ( qualifier.nodeType ) {
  		return jQuery.grep( elements, function( elem ) {
  			return ( elem === qualifier ) !== not;
  		} );
  	}
  
  	// Arraylike of elements (jQuery, arguments, Array)
  	if ( typeof qualifier !== "string" ) {
  		return jQuery.grep( elements, function( elem ) {
  			return ( indexOf.call( qualifier, elem ) > -1 ) !== not;
  		} );
  	}
  
  	// Filtered directly for both simple and complex selectors
  	return jQuery.filter( qualifier, elements, not );
  }
  
  jQuery.filter = function( expr, elems, not ) {
  	var elem = elems[ 0 ];
  
  	if ( not ) {
  		expr = ":not(" + expr + ")";
  	}
  
  	if ( elems.length === 1 && elem.nodeType === 1 ) {
  		return jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [];
  	}
  
  	return jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
  		return elem.nodeType === 1;
  	} ) );
  };
  
  jQuery.fn.extend( {
  	find: function( selector ) {
  		var i, ret,
  			len = this.length,
  			self = this;
  
  		if ( typeof selector !== "string" ) {
  			return this.pushStack( jQuery( selector ).filter( function() {
  				for ( i = 0; i < len; i++ ) {
  					if ( jQuery.contains( self[ i ], this ) ) {
  						return true;
  					}
  				}
  			} ) );
  		}
  
  		ret = this.pushStack( [] );
  
  		for ( i = 0; i < len; i++ ) {
  			jQuery.find( selector, self[ i ], ret );
  		}
  
  		return len > 1 ? jQuery.uniqueSort( ret ) : ret;
  	},
  	filter: function( selector ) {
  		return this.pushStack( winnow( this, selector || [], false ) );
  	},
  	not: function( selector ) {
  		return this.pushStack( winnow( this, selector || [], true ) );
  	},
  	is: function( selector ) {
  		return !!winnow(
  			this,
  
  			// If this is a positional/relative selector, check membership in the returned set
  			// so $("p:first").is("p:last") won't return true for a doc with two "p".
  			typeof selector === "string" && rneedsContext.test( selector ) ?
  				jQuery( selector ) :
  				selector || [],
  			false
  		).length;
  	}
  } );
  
  
  // Initialize a jQuery object
  
  
  // A central reference to the root jQuery(document)
  var rootjQuery,
  
  	// A simple way to check for HTML strings
  	// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
  	// Strict HTML recognition (#11290: must start with <)
  	// Shortcut simple #id case for speed
  	rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]+))$/,
  
  	init = jQuery.fn.init = function( selector, context, root ) {
  		var match, elem;
  
  		// HANDLE: $(""), $(null), $(undefined), $(false)
  		if ( !selector ) {
  			return this;
  		}
  
  		// Method init() accepts an alternate rootjQuery
  		// so migrate can support jQuery.sub (gh-2101)
  		root = root || rootjQuery;
  
  		// Handle HTML strings
  		if ( typeof selector === "string" ) {
  			if ( selector[ 0 ] === "<" &&
  				selector[ selector.length - 1 ] === ">" &&
  				selector.length >= 3 ) {
  
  				// Assume that strings that start and end with <> are HTML and skip the regex check
  				match = [ null, selector, null ];
  
  			} else {
  				match = rquickExpr.exec( selector );
  			}
  
  			// Match html or make sure no context is specified for #id
  			if ( match && ( match[ 1 ] || !context ) ) {
  
  				// HANDLE: $(html) -> $(array)
  				if ( match[ 1 ] ) {
  					context = context instanceof jQuery ? context[ 0 ] : context;
  
  					// Option to run scripts is true for back-compat
  					// Intentionally let the error be thrown if parseHTML is not present
  					jQuery.merge( this, jQuery.parseHTML(
  						match[ 1 ],
  						context && context.nodeType ? context.ownerDocument || context : document,
  						true
  					) );
  
  					// HANDLE: $(html, props)
  					if ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {
  						for ( match in context ) {
  
  							// Properties of context are called as methods if possible
  							if ( isFunction( this[ match ] ) ) {
  								this[ match ]( context[ match ] );
  
  							// ...and otherwise set as attributes
  							} else {
  								this.attr( match, context[ match ] );
  							}
  						}
  					}
  
  					return this;
  
  				// HANDLE: $(#id)
  				} else {
  					elem = document.getElementById( match[ 2 ] );
  
  					if ( elem ) {
  
  						// Inject the element directly into the jQuery object
  						this[ 0 ] = elem;
  						this.length = 1;
  					}
  					return this;
  				}
  
  			// HANDLE: $(expr, $(...))
  			} else if ( !context || context.jquery ) {
  				return ( context || root ).find( selector );
  
  			// HANDLE: $(expr, context)
  			// (which is just equivalent to: $(context).find(expr)
  			} else {
  				return this.constructor( context ).find( selector );
  			}
  
  		// HANDLE: $(DOMElement)
  		} else if ( selector.nodeType ) {
  			this[ 0 ] = selector;
  			this.length = 1;
  			return this;
  
  		// HANDLE: $(function)
  		// Shortcut for document ready
  		} else if ( isFunction( selector ) ) {
  			return root.ready !== undefined ?
  				root.ready( selector ) :
  
  				// Execute immediately if ready is not present
  				selector( jQuery );
  		}
  
  		return jQuery.makeArray( selector, this );
  	};
  
  // Give the init function the jQuery prototype for later instantiation
  init.prototype = jQuery.fn;
  
  // Initialize central reference
  rootjQuery = jQuery( document );
  
  
  var rparentsprev = /^(?:parents|prev(?:Until|All))/,
  
  	// Methods guaranteed to produce a unique set when starting from a unique set
  	guaranteedUnique = {
  		children: true,
  		contents: true,
  		next: true,
  		prev: true
  	};
  
  jQuery.fn.extend( {
  	has: function( target ) {
  		var targets = jQuery( target, this ),
  			l = targets.length;
  
  		return this.filter( function() {
  			var i = 0;
  			for ( ; i < l; i++ ) {
  				if ( jQuery.contains( this, targets[ i ] ) ) {
  					return true;
  				}
  			}
  		} );
  	},
  
  	closest: function( selectors, context ) {
  		var cur,
  			i = 0,
  			l = this.length,
  			matched = [],
  			targets = typeof selectors !== "string" && jQuery( selectors );
  
  		// Positional selectors never match, since there's no _selection_ context
  		if ( !rneedsContext.test( selectors ) ) {
  			for ( ; i < l; i++ ) {
  				for ( cur = this[ i ]; cur && cur !== context; cur = cur.parentNode ) {
  
  					// Always skip document fragments
  					if ( cur.nodeType < 11 && ( targets ?
  						targets.index( cur ) > -1 :
  
  						// Don't pass non-elements to Sizzle
  						cur.nodeType === 1 &&
  							jQuery.find.matchesSelector( cur, selectors ) ) ) {
  
  						matched.push( cur );
  						break;
  					}
  				}
  			}
  		}
  
  		return this.pushStack( matched.length > 1 ? jQuery.uniqueSort( matched ) : matched );
  	},
  
  	// Determine the position of an element within the set
  	index: function( elem ) {
  
  		// No argument, return index in parent
  		if ( !elem ) {
  			return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;
  		}
  
  		// Index in selector
  		if ( typeof elem === "string" ) {
  			return indexOf.call( jQuery( elem ), this[ 0 ] );
  		}
  
  		// Locate the position of the desired element
  		return indexOf.call( this,
  
  			// If it receives a jQuery object, the first element is used
  			elem.jquery ? elem[ 0 ] : elem
  		);
  	},
  
  	add: function( selector, context ) {
  		return this.pushStack(
  			jQuery.uniqueSort(
  				jQuery.merge( this.get(), jQuery( selector, context ) )
  			)
  		);
  	},
  
  	addBack: function( selector ) {
  		return this.add( selector == null ?
  			this.prevObject : this.prevObject.filter( selector )
  		);
  	}
  } );
  
  function sibling( cur, dir ) {
  	while ( ( cur = cur[ dir ] ) && cur.nodeType !== 1 ) {}
  	return cur;
  }
  
  jQuery.each( {
  	parent: function( elem ) {
  		var parent = elem.parentNode;
  		return parent && parent.nodeType !== 11 ? parent : null;
  	},
  	parents: function( elem ) {
  		return dir( elem, "parentNode" );
  	},
  	parentsUntil: function( elem, i, until ) {
  		return dir( elem, "parentNode", until );
  	},
  	next: function( elem ) {
  		return sibling( elem, "nextSibling" );
  	},
  	prev: function( elem ) {
  		return sibling( elem, "previousSibling" );
  	},
  	nextAll: function( elem ) {
  		return dir( elem, "nextSibling" );
  	},
  	prevAll: function( elem ) {
  		return dir( elem, "previousSibling" );
  	},
  	nextUntil: function( elem, i, until ) {
  		return dir( elem, "nextSibling", until );
  	},
  	prevUntil: function( elem, i, until ) {
  		return dir( elem, "previousSibling", until );
  	},
  	siblings: function( elem ) {
  		return siblings( ( elem.parentNode || {} ).firstChild, elem );
  	},
  	children: function( elem ) {
  		return siblings( elem.firstChild );
  	},
  	contents: function( elem ) {
          if ( nodeName( elem, "iframe" ) ) {
              return elem.contentDocument;
          }
  
          // Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only
          // Treat the template element as a regular one in browsers that
          // don't support it.
          if ( nodeName( elem, "template" ) ) {
              elem = elem.content || elem;
          }
  
          return jQuery.merge( [], elem.childNodes );
  	}
  }, function( name, fn ) {
  	jQuery.fn[ name ] = function( until, selector ) {
  		var matched = jQuery.map( this, fn, until );
  
  		if ( name.slice( -5 ) !== "Until" ) {
  			selector = until;
  		}
  
  		if ( selector && typeof selector === "string" ) {
  			matched = jQuery.filter( selector, matched );
  		}
  
  		if ( this.length > 1 ) {
  
  			// Remove duplicates
  			if ( !guaranteedUnique[ name ] ) {
  				jQuery.uniqueSort( matched );
  			}
  
  			// Reverse order for parents* and prev-derivatives
  			if ( rparentsprev.test( name ) ) {
  				matched.reverse();
  			}
  		}
  
  		return this.pushStack( matched );
  	};
  } );
  var rnothtmlwhite = ( /[^\x20\t\r\n\f]+/g );
  
  
  
  // Convert String-formatted options into Object-formatted ones
  function createOptions( options ) {
  	var object = {};
  	jQuery.each( options.match( rnothtmlwhite ) || [], function( _, flag ) {
  		object[ flag ] = true;
  	} );
  	return object;
  }
  
  /*
   * Create a callback list using the following parameters:
   *
   *	options: an optional list of space-separated options that will change how
   *			the callback list behaves or a more traditional option object
   *
   * By default a callback list will act like an event callback list and can be
   * "fired" multiple times.
   *
   * Possible options:
   *
   *	once:			will ensure the callback list can only be fired once (like a Deferred)
   *
   *	memory:			will keep track of previous values and will call any callback added
   *					after the list has been fired right away with the latest "memorized"
   *					values (like a Deferred)
   *
   *	unique:			will ensure a callback can only be added once (no duplicate in the list)
   *
   *	stopOnFalse:	interrupt callings when a callback returns false
   *
   */
  jQuery.Callbacks = function( options ) {
  
  	// Convert options from String-formatted to Object-formatted if needed
  	// (we check in cache first)
  	options = typeof options === "string" ?
  		createOptions( options ) :
  		jQuery.extend( {}, options );
  
  	var // Flag to know if list is currently firing
  		firing,
  
  		// Last fire value for non-forgettable lists
  		memory,
  
  		// Flag to know if list was already fired
  		fired,
  
  		// Flag to prevent firing
  		locked,
  
  		// Actual callback list
  		list = [],
  
  		// Queue of execution data for repeatable lists
  		queue = [],
  
  		// Index of currently firing callback (modified by add/remove as needed)
  		firingIndex = -1,
  
  		// Fire callbacks
  		fire = function() {
  
  			// Enforce single-firing
  			locked = locked || options.once;
  
  			// Execute callbacks for all pending executions,
  			// respecting firingIndex overrides and runtime changes
  			fired = firing = true;
  			for ( ; queue.length; firingIndex = -1 ) {
  				memory = queue.shift();
  				while ( ++firingIndex < list.length ) {
  
  					// Run callback and check for early termination
  					if ( list[ firingIndex ].apply( memory[ 0 ], memory[ 1 ] ) === false &&
  						options.stopOnFalse ) {
  
  						// Jump to end and forget the data so .add doesn't re-fire
  						firingIndex = list.length;
  						memory = false;
  					}
  				}
  			}
  
  			// Forget the data if we're done with it
  			if ( !options.memory ) {
  				memory = false;
  			}
  
  			firing = false;
  
  			// Clean up if we're done firing for good
  			if ( locked ) {
  
  				// Keep an empty list if we have data for future add calls
  				if ( memory ) {
  					list = [];
  
  				// Otherwise, this object is spent
  				} else {
  					list = "";
  				}
  			}
  		},
  
  		// Actual Callbacks object
  		self = {
  
  			// Add a callback or a collection of callbacks to the list
  			add: function() {
  				if ( list ) {
  
  					// If we have memory from a past run, we should fire after adding
  					if ( memory && !firing ) {
  						firingIndex = list.length - 1;
  						queue.push( memory );
  					}
  
  					( function add( args ) {
  						jQuery.each( args, function( _, arg ) {
  							if ( isFunction( arg ) ) {
  								if ( !options.unique || !self.has( arg ) ) {
  									list.push( arg );
  								}
  							} else if ( arg && arg.length && toType( arg ) !== "string" ) {
  
  								// Inspect recursively
  								add( arg );
  							}
  						} );
  					} )( arguments );
  
  					if ( memory && !firing ) {
  						fire();
  					}
  				}
  				return this;
  			},
  
  			// Remove a callback from the list
  			remove: function() {
  				jQuery.each( arguments, function( _, arg ) {
  					var index;
  					while ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
  						list.splice( index, 1 );
  
  						// Handle firing indexes
  						if ( index <= firingIndex ) {
  							firingIndex--;
  						}
  					}
  				} );
  				return this;
  			},
  
  			// Check if a given callback is in the list.
  			// If no argument is given, return whether or not list has callbacks attached.
  			has: function( fn ) {
  				return fn ?
  					jQuery.inArray( fn, list ) > -1 :
  					list.length > 0;
  			},
  
  			// Remove all callbacks from the list
  			empty: function() {
  				if ( list ) {
  					list = [];
  				}
  				return this;
  			},
  
  			// Disable .fire and .add
  			// Abort any current/pending executions
  			// Clear all callbacks and values
  			disable: function() {
  				locked = queue = [];
  				list = memory = "";
  				return this;
  			},
  			disabled: function() {
  				return !list;
  			},
  
  			// Disable .fire
  			// Also disable .add unless we have memory (since it would have no effect)
  			// Abort any pending executions
  			lock: function() {
  				locked = queue = [];
  				if ( !memory && !firing ) {
  					list = memory = "";
  				}
  				return this;
  			},
  			locked: function() {
  				return !!locked;
  			},
  
  			// Call all callbacks with the given context and arguments
  			fireWith: function( context, args ) {
  				if ( !locked ) {
  					args = args || [];
  					args = [ context, args.slice ? args.slice() : args ];
  					queue.push( args );
  					if ( !firing ) {
  						fire();
  					}
  				}
  				return this;
  			},
  
  			// Call all the callbacks with the given arguments
  			fire: function() {
  				self.fireWith( this, arguments );
  				return this;
  			},
  
  			// To know if the callbacks have already been called at least once
  			fired: function() {
  				return !!fired;
  			}
  		};
  
  	return self;
  };
  
  
  function Identity( v ) {
  	return v;
  }
  function Thrower( ex ) {
  	throw ex;
  }
  
  function adoptValue( value, resolve, reject, noValue ) {
  	var method;
  
  	try {
  
  		// Check for promise aspect first to privilege synchronous behavior
  		if ( value && isFunction( ( method = value.promise ) ) ) {
  			method.call( value ).done( resolve ).fail( reject );
  
  		// Other thenables
  		} else if ( value && isFunction( ( method = value.then ) ) ) {
  			method.call( value, resolve, reject );
  
  		// Other non-thenables
  		} else {
  
  			// Control `resolve` arguments by letting Array#slice cast boolean `noValue` to integer:
  			// * false: [ value ].slice( 0 ) => resolve( value )
  			// * true: [ value ].slice( 1 ) => resolve()
  			resolve.apply( undefined, [ value ].slice( noValue ) );
  		}
  
  	// For Promises/A+, convert exceptions into rejections
  	// Since jQuery.when doesn't unwrap thenables, we can skip the extra checks appearing in
  	// Deferred#then to conditionally suppress rejection.
  	} catch ( value ) {
  
  		// Support: Android 4.0 only
  		// Strict mode functions invoked without .call/.apply get global-object context
  		reject.apply( undefined, [ value ] );
  	}
  }
  
  jQuery.extend( {
  
  	Deferred: function( func ) {
  		var tuples = [
  
  				// action, add listener, callbacks,
  				// ... .then handlers, argument index, [final state]
  				[ "notify", "progress", jQuery.Callbacks( "memory" ),
  					jQuery.Callbacks( "memory" ), 2 ],
  				[ "resolve", "done", jQuery.Callbacks( "once memory" ),
  					jQuery.Callbacks( "once memory" ), 0, "resolved" ],
  				[ "reject", "fail", jQuery.Callbacks( "once memory" ),
  					jQuery.Callbacks( "once memory" ), 1, "rejected" ]
  			],
  			state = "pending",
  			promise = {
  				state: function() {
  					return state;
  				},
  				always: function() {
  					deferred.done( arguments ).fail( arguments );
  					return this;
  				},
  				"catch": function( fn ) {
  					return promise.then( null, fn );
  				},
  
  				// Keep pipe for back-compat
  				pipe: function( /* fnDone, fnFail, fnProgress */ ) {
  					var fns = arguments;
  
  					return jQuery.Deferred( function( newDefer ) {
  						jQuery.each( tuples, function( i, tuple ) {
  
  							// Map tuples (progress, done, fail) to arguments (done, fail, progress)
  							var fn = isFunction( fns[ tuple[ 4 ] ] ) && fns[ tuple[ 4 ] ];
  
  							// deferred.progress(function() { bind to newDefer or newDefer.notify })
  							// deferred.done(function() { bind to newDefer or newDefer.resolve })
  							// deferred.fail(function() { bind to newDefer or newDefer.reject })
  							deferred[ tuple[ 1 ] ]( function() {
  								var returned = fn && fn.apply( this, arguments );
  								if ( returned && isFunction( returned.promise ) ) {
  									returned.promise()
  										.progress( newDefer.notify )
  										.done( newDefer.resolve )
  										.fail( newDefer.reject );
  								} else {
  									newDefer[ tuple[ 0 ] + "With" ](
  										this,
  										fn ? [ returned ] : arguments
  									);
  								}
  							} );
  						} );
  						fns = null;
  					} ).promise();
  				},
  				then: function( onFulfilled, onRejected, onProgress ) {
  					var maxDepth = 0;
  					function resolve( depth, deferred, handler, special ) {
  						return function() {
  							var that = this,
  								args = arguments,
  								mightThrow = function() {
  									var returned, then;
  
  									// Support: Promises/A+ section 2.3.3.3.3
  									// https://promisesaplus.com/#point-59
  									// Ignore double-resolution attempts
  									if ( depth < maxDepth ) {
  										return;
  									}
  
  									returned = handler.apply( that, args );
  
  									// Support: Promises/A+ section 2.3.1
  									// https://promisesaplus.com/#point-48
  									if ( returned === deferred.promise() ) {
  										throw new TypeError( "Thenable self-resolution" );
  									}
  
  									// Support: Promises/A+ sections 2.3.3.1, 3.5
  									// https://promisesaplus.com/#point-54
  									// https://promisesaplus.com/#point-75
  									// Retrieve `then` only once
  									then = returned &&
  
  										// Support: Promises/A+ section 2.3.4
  										// https://promisesaplus.com/#point-64
  										// Only check objects and functions for thenability
  										( typeof returned === "object" ||
  											typeof returned === "function" ) &&
  										returned.then;
  
  									// Handle a returned thenable
  									if ( isFunction( then ) ) {
  
  										// Special processors (notify) just wait for resolution
  										if ( special ) {
  											then.call(
  												returned,
  												resolve( maxDepth, deferred, Identity, special ),
  												resolve( maxDepth, deferred, Thrower, special )
  											);
  
  										// Normal processors (resolve) also hook into progress
  										} else {
  
  											// ...and disregard older resolution values
  											maxDepth++;
  
  											then.call(
  												returned,
  												resolve( maxDepth, deferred, Identity, special ),
  												resolve( maxDepth, deferred, Thrower, special ),
  												resolve( maxDepth, deferred, Identity,
  													deferred.notifyWith )
  											);
  										}
  
  									// Handle all other returned values
  									} else {
  
  										// Only substitute handlers pass on context
  										// and multiple values (non-spec behavior)
  										if ( handler !== Identity ) {
  											that = undefined;
  											args = [ returned ];
  										}
  
  										// Process the value(s)
  										// Default process is resolve
  										( special || deferred.resolveWith )( that, args );
  									}
  								},
  
  								// Only normal processors (resolve) catch and reject exceptions
  								process = special ?
  									mightThrow :
  									function() {
  										try {
  											mightThrow();
  										} catch ( e ) {
  
  											if ( jQuery.Deferred.exceptionHook ) {
  												jQuery.Deferred.exceptionHook( e,
  													process.stackTrace );
  											}
  
  											// Support: Promises/A+ section 2.3.3.3.4.1
  											// https://promisesaplus.com/#point-61
  											// Ignore post-resolution exceptions
  											if ( depth + 1 >= maxDepth ) {
  
  												// Only substitute handlers pass on context
  												// and multiple values (non-spec behavior)
  												if ( handler !== Thrower ) {
  													that = undefined;
  													args = [ e ];
  												}
  
  												deferred.rejectWith( that, args );
  											}
  										}
  									};
  
  							// Support: Promises/A+ section 2.3.3.3.1
  							// https://promisesaplus.com/#point-57
  							// Re-resolve promises immediately to dodge false rejection from
  							// subsequent errors
  							if ( depth ) {
  								process();
  							} else {
  
  								// Call an optional hook to record the stack, in case of exception
  								// since it's otherwise lost when execution goes async
  								if ( jQuery.Deferred.getStackHook ) {
  									process.stackTrace = jQuery.Deferred.getStackHook();
  								}
  								window.setTimeout( process );
  							}
  						};
  					}
  
  					return jQuery.Deferred( function( newDefer ) {
  
  						// progress_handlers.add( ... )
  						tuples[ 0 ][ 3 ].add(
  							resolve(
  								0,
  								newDefer,
  								isFunction( onProgress ) ?
  									onProgress :
  									Identity,
  								newDefer.notifyWith
  							)
  						);
  
  						// fulfilled_handlers.add( ... )
  						tuples[ 1 ][ 3 ].add(
  							resolve(
  								0,
  								newDefer,
  								isFunction( onFulfilled ) ?
  									onFulfilled :
  									Identity
  							)
  						);
  
  						// rejected_handlers.add( ... )
  						tuples[ 2 ][ 3 ].add(
  							resolve(
  								0,
  								newDefer,
  								isFunction( onRejected ) ?
  									onRejected :
  									Thrower
  							)
  						);
  					} ).promise();
  				},
  
  				// Get a promise for this deferred
  				// If obj is provided, the promise aspect is added to the object
  				promise: function( obj ) {
  					return obj != null ? jQuery.extend( obj, promise ) : promise;
  				}
  			},
  			deferred = {};
  
  		// Add list-specific methods
  		jQuery.each( tuples, function( i, tuple ) {
  			var list = tuple[ 2 ],
  				stateString = tuple[ 5 ];
  
  			// promise.progress = list.add
  			// promise.done = list.add
  			// promise.fail = list.add
  			promise[ tuple[ 1 ] ] = list.add;
  
  			// Handle state
  			if ( stateString ) {
  				list.add(
  					function() {
  
  						// state = "resolved" (i.e., fulfilled)
  						// state = "rejected"
  						state = stateString;
  					},
  
  					// rejected_callbacks.disable
  					// fulfilled_callbacks.disable
  					tuples[ 3 - i ][ 2 ].disable,
  
  					// rejected_handlers.disable
  					// fulfilled_handlers.disable
  					tuples[ 3 - i ][ 3 ].disable,
  
  					// progress_callbacks.lock
  					tuples[ 0 ][ 2 ].lock,
  
  					// progress_handlers.lock
  					tuples[ 0 ][ 3 ].lock
  				);
  			}
  
  			// progress_handlers.fire
  			// fulfilled_handlers.fire
  			// rejected_handlers.fire
  			list.add( tuple[ 3 ].fire );
  
  			// deferred.notify = function() { deferred.notifyWith(...) }
  			// deferred.resolve = function() { deferred.resolveWith(...) }
  			// deferred.reject = function() { deferred.rejectWith(...) }
  			deferred[ tuple[ 0 ] ] = function() {
  				deferred[ tuple[ 0 ] + "With" ]( this === deferred ? undefined : this, arguments );
  				return this;
  			};
  
  			// deferred.notifyWith = list.fireWith
  			// deferred.resolveWith = list.fireWith
  			// deferred.rejectWith = list.fireWith
  			deferred[ tuple[ 0 ] + "With" ] = list.fireWith;
  		} );
  
  		// Make the deferred a promise
  		promise.promise( deferred );
  
  		// Call given func if any
  		if ( func ) {
  			func.call( deferred, deferred );
  		}
  
  		// All done!
  		return deferred;
  	},
  
  	// Deferred helper
  	when: function( singleValue ) {
  		var
  
  			// count of uncompleted subordinates
  			remaining = arguments.length,
  
  			// count of unprocessed arguments
  			i = remaining,
  
  			// subordinate fulfillment data
  			resolveContexts = Array( i ),
  			resolveValues = slice.call( arguments ),
  
  			// the master Deferred
  			master = jQuery.Deferred(),
  
  			// subordinate callback factory
  			updateFunc = function( i ) {
  				return function( value ) {
  					resolveContexts[ i ] = this;
  					resolveValues[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
  					if ( !( --remaining ) ) {
  						master.resolveWith( resolveContexts, resolveValues );
  					}
  				};
  			};
  
  		// Single- and empty arguments are adopted like Promise.resolve
  		if ( remaining <= 1 ) {
  			adoptValue( singleValue, master.done( updateFunc( i ) ).resolve, master.reject,
  				!remaining );
  
  			// Use .then() to unwrap secondary thenables (cf. gh-3000)
  			if ( master.state() === "pending" ||
  				isFunction( resolveValues[ i ] && resolveValues[ i ].then ) ) {
  
  				return master.then();
  			}
  		}
  
  		// Multiple arguments are aggregated like Promise.all array elements
  		while ( i-- ) {
  			adoptValue( resolveValues[ i ], updateFunc( i ), master.reject );
  		}
  
  		return master.promise();
  	}
  } );
  
  
  // These usually indicate a programmer mistake during development,
  // warn about them ASAP rather than swallowing them by default.
  var rerrorNames = /^(Eval|Internal|Range|Reference|Syntax|Type|URI)Error$/;
  
  jQuery.Deferred.exceptionHook = function( error, stack ) {
  
  	// Support: IE 8 - 9 only
  	// Console exists when dev tools are open, which can happen at any time
  	if ( window.console && window.console.warn && error && rerrorNames.test( error.name ) ) {
  		window.console.warn( "jQuery.Deferred exception: " + error.message, error.stack, stack );
  	}
  };
  
  
  
  
  jQuery.readyException = function( error ) {
  	window.setTimeout( function() {
  		throw error;
  	} );
  };
  
  
  
  
  // The deferred used on DOM ready
  var readyList = jQuery.Deferred();
  
  jQuery.fn.ready = function( fn ) {
  
  	readyList
  		.then( fn )
  
  		// Wrap jQuery.readyException in a function so that the lookup
  		// happens at the time of error handling instead of callback
  		// registration.
  		.catch( function( error ) {
  			jQuery.readyException( error );
  		} );
  
  	return this;
  };
  
  jQuery.extend( {
  
  	// Is the DOM ready to be used? Set to true once it occurs.
  	isReady: false,
  
  	// A counter to track how many items to wait for before
  	// the ready event fires. See #6781
  	readyWait: 1,
  
  	// Handle when the DOM is ready
  	ready: function( wait ) {
  
  		// Abort if there are pending holds or we're already ready
  		if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
  			return;
  		}
  
  		// Remember that the DOM is ready
  		jQuery.isReady = true;
  
  		// If a normal DOM Ready event fired, decrement, and wait if need be
  		if ( wait !== true && --jQuery.readyWait > 0 ) {
  			return;
  		}
  
  		// If there are functions bound, to execute
  		readyList.resolveWith( document, [ jQuery ] );
  	}
  } );
  
  jQuery.ready.then = readyList.then;
  
  // The ready event handler and self cleanup method
  function completed() {
  	document.removeEventListener( "DOMContentLoaded", completed );
  	window.removeEventListener( "load", completed );
  	jQuery.ready();
  }
  
  // Catch cases where $(document).ready() is called
  // after the browser event has already occurred.
  // Support: IE <=9 - 10 only
  // Older IE sometimes signals "interactive" too soon
  if ( document.readyState === "complete" ||
  	( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
  
  	// Handle it asynchronously to allow scripts the opportunity to delay ready
  	window.setTimeout( jQuery.ready );
  
  } else {
  
  	// Use the handy event callback
  	document.addEventListener( "DOMContentLoaded", completed );
  
  	// A fallback to window.onload, that will always work
  	window.addEventListener( "load", completed );
  }
  
  
  
  
  // Multifunctional method to get and set values of a collection
  // The value/s can optionally be executed if it's a function
  var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
  	var i = 0,
  		len = elems.length,
  		bulk = key == null;
  
  	// Sets many values
  	if ( toType( key ) === "object" ) {
  		chainable = true;
  		for ( i in key ) {
  			access( elems, fn, i, key[ i ], true, emptyGet, raw );
  		}
  
  	// Sets one value
  	} else if ( value !== undefined ) {
  		chainable = true;
  
  		if ( !isFunction( value ) ) {
  			raw = true;
  		}
  
  		if ( bulk ) {
  
  			// Bulk operations run against the entire set
  			if ( raw ) {
  				fn.call( elems, value );
  				fn = null;
  
  			// ...except when executing function values
  			} else {
  				bulk = fn;
  				fn = function( elem, key, value ) {
  					return bulk.call( jQuery( elem ), value );
  				};
  			}
  		}
  
  		if ( fn ) {
  			for ( ; i < len; i++ ) {
  				fn(
  					elems[ i ], key, raw ?
  					value :
  					value.call( elems[ i ], i, fn( elems[ i ], key ) )
  				);
  			}
  		}
  	}
  
  	if ( chainable ) {
  		return elems;
  	}
  
  	// Gets
  	if ( bulk ) {
  		return fn.call( elems );
  	}
  
  	return len ? fn( elems[ 0 ], key ) : emptyGet;
  };
  
  
  // Matches dashed string for camelizing
  var rmsPrefix = /^-ms-/,
  	rdashAlpha = /-([a-z])/g;
  
  // Used by camelCase as callback to replace()
  function fcamelCase( all, letter ) {
  	return letter.toUpperCase();
  }
  
  // Convert dashed to camelCase; used by the css and data modules
  // Support: IE <=9 - 11, Edge 12 - 15
  // Microsoft forgot to hump their vendor prefix (#9572)
  function camelCase( string ) {
  	return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
  }
  var acceptData = function( owner ) {
  
  	// Accepts only:
  	//  - Node
  	//    - Node.ELEMENT_NODE
  	//    - Node.DOCUMENT_NODE
  	//  - Object
  	//    - Any
  	return owner.nodeType === 1 || owner.nodeType === 9 || !( +owner.nodeType );
  };
  
  
  
  
  function Data() {
  	this.expando = jQuery.expando + Data.uid++;
  }
  
  Data.uid = 1;
  
  Data.prototype = {
  
  	cache: function( owner ) {
  
  		// Check if the owner object already has a cache
  		var value = owner[ this.expando ];
  
  		// If not, create one
  		if ( !value ) {
  			value = {};
  
  			// We can accept data for non-element nodes in modern browsers,
  			// but we should not, see #8335.
  			// Always return an empty object.
  			if ( acceptData( owner ) ) {
  
  				// If it is a node unlikely to be stringify-ed or looped over
  				// use plain assignment
  				if ( owner.nodeType ) {
  					owner[ this.expando ] = value;
  
  				// Otherwise secure it in a non-enumerable property
  				// configurable must be true to allow the property to be
  				// deleted when data is removed
  				} else {
  					Object.defineProperty( owner, this.expando, {
  						value: value,
  						configurable: true
  					} );
  				}
  			}
  		}
  
  		return value;
  	},
  	set: function( owner, data, value ) {
  		var prop,
  			cache = this.cache( owner );
  
  		// Handle: [ owner, key, value ] args
  		// Always use camelCase key (gh-2257)
  		if ( typeof data === "string" ) {
  			cache[ camelCase( data ) ] = value;
  
  		// Handle: [ owner, { properties } ] args
  		} else {
  
  			// Copy the properties one-by-one to the cache object
  			for ( prop in data ) {
  				cache[ camelCase( prop ) ] = data[ prop ];
  			}
  		}
  		return cache;
  	},
  	get: function( owner, key ) {
  		return key === undefined ?
  			this.cache( owner ) :
  
  			// Always use camelCase key (gh-2257)
  			owner[ this.expando ] && owner[ this.expando ][ camelCase( key ) ];
  	},
  	access: function( owner, key, value ) {
  
  		// In cases where either:
  		//
  		//   1. No key was specified
  		//   2. A string key was specified, but no value provided
  		//
  		// Take the "read" path and allow the get method to determine
  		// which value to return, respectively either:
  		//
  		//   1. The entire cache object
  		//   2. The data stored at the key
  		//
  		if ( key === undefined ||
  				( ( key && typeof key === "string" ) && value === undefined ) ) {
  
  			return this.get( owner, key );
  		}
  
  		// When the key is not a string, or both a key and value
  		// are specified, set or extend (existing objects) with either:
  		//
  		//   1. An object of properties
  		//   2. A key and value
  		//
  		this.set( owner, key, value );
  
  		// Since the "set" path can have two possible entry points
  		// return the expected data based on which path was taken[*]
  		return value !== undefined ? value : key;
  	},
  	remove: function( owner, key ) {
  		var i,
  			cache = owner[ this.expando ];
  
  		if ( cache === undefined ) {
  			return;
  		}
  
  		if ( key !== undefined ) {
  
  			// Support array or space separated string of keys
  			if ( Array.isArray( key ) ) {
  
  				// If key is an array of keys...
  				// We always set camelCase keys, so remove that.
  				key = key.map( camelCase );
  			} else {
  				key = camelCase( key );
  
  				// If a key with the spaces exists, use it.
  				// Otherwise, create an array by matching non-whitespace
  				key = key in cache ?
  					[ key ] :
  					( key.match( rnothtmlwhite ) || [] );
  			}
  
  			i = key.length;
  
  			while ( i-- ) {
  				delete cache[ key[ i ] ];
  			}
  		}
  
  		// Remove the expando if there's no more data
  		if ( key === undefined || jQuery.isEmptyObject( cache ) ) {
  
  			// Support: Chrome <=35 - 45
  			// Webkit & Blink performance suffers when deleting properties
  			// from DOM nodes, so set to undefined instead
  			// https://bugs.chromium.org/p/chromium/issues/detail?id=378607 (bug restricted)
  			if ( owner.nodeType ) {
  				owner[ this.expando ] = undefined;
  			} else {
  				delete owner[ this.expando ];
  			}
  		}
  	},
  	hasData: function( owner ) {
  		var cache = owner[ this.expando ];
  		return cache !== undefined && !jQuery.isEmptyObject( cache );
  	}
  };
  var dataPriv = new Data();
  
  var dataUser = new Data();
  
  
  
  //	Implementation Summary
  //
  //	1. Enforce API surface and semantic compatibility with 1.9.x branch
  //	2. Improve the module's maintainability by reducing the storage
  //		paths to a single mechanism.
  //	3. Use the same single mechanism to support "private" and "user" data.
  //	4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
  //	5. Avoid exposing implementation details on user objects (eg. expando properties)
  //	6. Provide a clear path for implementation upgrade to WeakMap in 2014
  
  var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
  	rmultiDash = /[A-Z]/g;
  
  function getData( data ) {
  	if ( data === "true" ) {
  		return true;
  	}
  
  	if ( data === "false" ) {
  		return false;
  	}
  
  	if ( data === "null" ) {
  		return null;
  	}
  
  	// Only convert to a number if it doesn't change the string
  	if ( data === +data + "" ) {
  		return +data;
  	}
  
  	if ( rbrace.test( data ) ) {
  		return JSON.parse( data );
  	}
  
  	return data;
  }
  
  function dataAttr( elem, key, data ) {
  	var name;
  
  	// If nothing was found internally, try to fetch any
  	// data from the HTML5 data-* attribute
  	if ( data === undefined && elem.nodeType === 1 ) {
  		name = "data-" + key.replace( rmultiDash, "-$&" ).toLowerCase();
  		data = elem.getAttribute( name );
  
  		if ( typeof data === "string" ) {
  			try {
  				data = getData( data );
  			} catch ( e ) {}
  
  			// Make sure we set the data so it isn't changed later
  			dataUser.set( elem, key, data );
  		} else {
  			data = undefined;
  		}
  	}
  	return data;
  }
  
  jQuery.extend( {
  	hasData: function( elem ) {
  		return dataUser.hasData( elem ) || dataPriv.hasData( elem );
  	},
  
  	data: function( elem, name, data ) {
  		return dataUser.access( elem, name, data );
  	},
  
  	removeData: function( elem, name ) {
  		dataUser.remove( elem, name );
  	},
  
  	// TODO: Now that all calls to _data and _removeData have been replaced
  	// with direct calls to dataPriv methods, these can be deprecated.
  	_data: function( elem, name, data ) {
  		return dataPriv.access( elem, name, data );
  	},
  
  	_removeData: function( elem, name ) {
  		dataPriv.remove( elem, name );
  	}
  } );
  
  jQuery.fn.extend( {
  	data: function( key, value ) {
  		var i, name, data,
  			elem = this[ 0 ],
  			attrs = elem && elem.attributes;
  
  		// Gets all values
  		if ( key === undefined ) {
  			if ( this.length ) {
  				data = dataUser.get( elem );
  
  				if ( elem.nodeType === 1 && !dataPriv.get( elem, "hasDataAttrs" ) ) {
  					i = attrs.length;
  					while ( i-- ) {
  
  						// Support: IE 11 only
  						// The attrs elements can be null (#14894)
  						if ( attrs[ i ] ) {
  							name = attrs[ i ].name;
  							if ( name.indexOf( "data-" ) === 0 ) {
  								name = camelCase( name.slice( 5 ) );
  								dataAttr( elem, name, data[ name ] );
  							}
  						}
  					}
  					dataPriv.set( elem, "hasDataAttrs", true );
  				}
  			}
  
  			return data;
  		}
  
  		// Sets multiple values
  		if ( typeof key === "object" ) {
  			return this.each( function() {
  				dataUser.set( this, key );
  			} );
  		}
  
  		return access( this, function( value ) {
  			var data;
  
  			// The calling jQuery object (element matches) is not empty
  			// (and therefore has an element appears at this[ 0 ]) and the
  			// `value` parameter was not undefined. An empty jQuery object
  			// will result in `undefined` for elem = this[ 0 ] which will
  			// throw an exception if an attempt to read a data cache is made.
  			if ( elem && value === undefined ) {
  
  				// Attempt to get data from the cache
  				// The key will always be camelCased in Data
  				data = dataUser.get( elem, key );
  				if ( data !== undefined ) {
  					return data;
  				}
  
  				// Attempt to "discover" the data in
  				// HTML5 custom data-* attrs
  				data = dataAttr( elem, key );
  				if ( data !== undefined ) {
  					return data;
  				}
  
  				// We tried really hard, but the data doesn't exist.
  				return;
  			}
  
  			// Set the data...
  			this.each( function() {
  
  				// We always store the camelCased key
  				dataUser.set( this, key, value );
  			} );
  		}, null, value, arguments.length > 1, null, true );
  	},
  
  	removeData: function( key ) {
  		return this.each( function() {
  			dataUser.remove( this, key );
  		} );
  	}
  } );
  
  
  jQuery.extend( {
  	queue: function( elem, type, data ) {
  		var queue;
  
  		if ( elem ) {
  			type = ( type || "fx" ) + "queue";
  			queue = dataPriv.get( elem, type );
  
  			// Speed up dequeue by getting out quickly if this is just a lookup
  			if ( data ) {
  				if ( !queue || Array.isArray( data ) ) {
  					queue = dataPriv.access( elem, type, jQuery.makeArray( data ) );
  				} else {
  					queue.push( data );
  				}
  			}
  			return queue || [];
  		}
  	},
  
  	dequeue: function( elem, type ) {
  		type = type || "fx";
  
  		var queue = jQuery.queue( elem, type ),
  			startLength = queue.length,
  			fn = queue.shift(),
  			hooks = jQuery._queueHooks( elem, type ),
  			next = function() {
  				jQuery.dequeue( elem, type );
  			};
  
  		// If the fx queue is dequeued, always remove the progress sentinel
  		if ( fn === "inprogress" ) {
  			fn = queue.shift();
  			startLength--;
  		}
  
  		if ( fn ) {
  
  			// Add a progress sentinel to prevent the fx queue from being
  			// automatically dequeued
  			if ( type === "fx" ) {
  				queue.unshift( "inprogress" );
  			}
  
  			// Clear up the last queue stop function
  			delete hooks.stop;
  			fn.call( elem, next, hooks );
  		}
  
  		if ( !startLength && hooks ) {
  			hooks.empty.fire();
  		}
  	},
  
  	// Not public - generate a queueHooks object, or return the current one
  	_queueHooks: function( elem, type ) {
  		var key = type + "queueHooks";
  		return dataPriv.get( elem, key ) || dataPriv.access( elem, key, {
  			empty: jQuery.Callbacks( "once memory" ).add( function() {
  				dataPriv.remove( elem, [ type + "queue", key ] );
  			} )
  		} );
  	}
  } );
  
  jQuery.fn.extend( {
  	queue: function( type, data ) {
  		var setter = 2;
  
  		if ( typeof type !== "string" ) {
  			data = type;
  			type = "fx";
  			setter--;
  		}
  
  		if ( arguments.length < setter ) {
  			return jQuery.queue( this[ 0 ], type );
  		}
  
  		return data === undefined ?
  			this :
  			this.each( function() {
  				var queue = jQuery.queue( this, type, data );
  
  				// Ensure a hooks for this queue
  				jQuery._queueHooks( this, type );
  
  				if ( type === "fx" && queue[ 0 ] !== "inprogress" ) {
  					jQuery.dequeue( this, type );
  				}
  			} );
  	},
  	dequeue: function( type ) {
  		return this.each( function() {
  			jQuery.dequeue( this, type );
  		} );
  	},
  	clearQueue: function( type ) {
  		return this.queue( type || "fx", [] );
  	},
  
  	// Get a promise resolved when queues of a certain type
  	// are emptied (fx is the type by default)
  	promise: function( type, obj ) {
  		var tmp,
  			count = 1,
  			defer = jQuery.Deferred(),
  			elements = this,
  			i = this.length,
  			resolve = function() {
  				if ( !( --count ) ) {
  					defer.resolveWith( elements, [ elements ] );
  				}
  			};
  
  		if ( typeof type !== "string" ) {
  			obj = type;
  			type = undefined;
  		}
  		type = type || "fx";
  
  		while ( i-- ) {
  			tmp = dataPriv.get( elements[ i ], type + "queueHooks" );
  			if ( tmp && tmp.empty ) {
  				count++;
  				tmp.empty.add( resolve );
  			}
  		}
  		resolve();
  		return defer.promise( obj );
  	}
  } );
  var pnum = ( /[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/ ).source;
  
  var rcssNum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" );
  
  
  var cssExpand = [ "Top", "Right", "Bottom", "Left" ];
  
  var isHiddenWithinTree = function( elem, el ) {
  
  		// isHiddenWithinTree might be called from jQuery#filter function;
  		// in that case, element will be second argument
  		elem = el || elem;
  
  		// Inline style trumps all
  		return elem.style.display === "none" ||
  			elem.style.display === "" &&
  
  			// Otherwise, check computed style
  			// Support: Firefox <=43 - 45
  			// Disconnected elements can have computed display: none, so first confirm that elem is
  			// in the document.
  			jQuery.contains( elem.ownerDocument, elem ) &&
  
  			jQuery.css( elem, "display" ) === "none";
  	};
  
  var swap = function( elem, options, callback, args ) {
  	var ret, name,
  		old = {};
  
  	// Remember the old values, and insert the new ones
  	for ( name in options ) {
  		old[ name ] = elem.style[ name ];
  		elem.style[ name ] = options[ name ];
  	}
  
  	ret = callback.apply( elem, args || [] );
  
  	// Revert the old values
  	for ( name in options ) {
  		elem.style[ name ] = old[ name ];
  	}
  
  	return ret;
  };
  
  
  
  
  function adjustCSS( elem, prop, valueParts, tween ) {
  	var adjusted, scale,
  		maxIterations = 20,
  		currentValue = tween ?
  			function() {
  				return tween.cur();
  			} :
  			function() {
  				return jQuery.css( elem, prop, "" );
  			},
  		initial = currentValue(),
  		unit = valueParts && valueParts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),
  
  		// Starting value computation is required for potential unit mismatches
  		initialInUnit = ( jQuery.cssNumber[ prop ] || unit !== "px" && +initial ) &&
  			rcssNum.exec( jQuery.css( elem, prop ) );
  
  	if ( initialInUnit && initialInUnit[ 3 ] !== unit ) {
  
  		// Support: Firefox <=54
  		// Halve the iteration target value to prevent interference from CSS upper bounds (gh-2144)
  		initial = initial / 2;
  
  		// Trust units reported by jQuery.css
  		unit = unit || initialInUnit[ 3 ];
  
  		// Iteratively approximate from a nonzero starting point
  		initialInUnit = +initial || 1;
  
  		while ( maxIterations-- ) {
  
  			// Evaluate and update our best guess (doubling guesses that zero out).
  			// Finish if the scale equals or crosses 1 (making the old*new product non-positive).
  			jQuery.style( elem, prop, initialInUnit + unit );
  			if ( ( 1 - scale ) * ( 1 - ( scale = currentValue() / initial || 0.5 ) ) <= 0 ) {
  				maxIterations = 0;
  			}
  			initialInUnit = initialInUnit / scale;
  
  		}
  
  		initialInUnit = initialInUnit * 2;
  		jQuery.style( elem, prop, initialInUnit + unit );
  
  		// Make sure we update the tween properties later on
  		valueParts = valueParts || [];
  	}
  
  	if ( valueParts ) {
  		initialInUnit = +initialInUnit || +initial || 0;
  
  		// Apply relative offset (+=/-=) if specified
  		adjusted = valueParts[ 1 ] ?
  			initialInUnit + ( valueParts[ 1 ] + 1 ) * valueParts[ 2 ] :
  			+valueParts[ 2 ];
  		if ( tween ) {
  			tween.unit = unit;
  			tween.start = initialInUnit;
  			tween.end = adjusted;
  		}
  	}
  	return adjusted;
  }
  
  
  var defaultDisplayMap = {};
  
  function getDefaultDisplay( elem ) {
  	var temp,
  		doc = elem.ownerDocument,
  		nodeName = elem.nodeName,
  		display = defaultDisplayMap[ nodeName ];
  
  	if ( display ) {
  		return display;
  	}
  
  	temp = doc.body.appendChild( doc.createElement( nodeName ) );
  	display = jQuery.css( temp, "display" );
  
  	temp.parentNode.removeChild( temp );
  
  	if ( display === "none" ) {
  		display = "block";
  	}
  	defaultDisplayMap[ nodeName ] = display;
  
  	return display;
  }
  
  function showHide( elements, show ) {
  	var display, elem,
  		values = [],
  		index = 0,
  		length = elements.length;
  
  	// Determine new display value for elements that need to change
  	for ( ; index < length; index++ ) {
  		elem = elements[ index ];
  		if ( !elem.style ) {
  			continue;
  		}
  
  		display = elem.style.display;
  		if ( show ) {
  
  			// Since we force visibility upon cascade-hidden elements, an immediate (and slow)
  			// check is required in this first loop unless we have a nonempty display value (either
  			// inline or about-to-be-restored)
  			if ( display === "none" ) {
  				values[ index ] = dataPriv.get( elem, "display" ) || null;
  				if ( !values[ index ] ) {
  					elem.style.display = "";
  				}
  			}
  			if ( elem.style.display === "" && isHiddenWithinTree( elem ) ) {
  				values[ index ] = getDefaultDisplay( elem );
  			}
  		} else {
  			if ( display !== "none" ) {
  				values[ index ] = "none";
  
  				// Remember what we're overwriting
  				dataPriv.set( elem, "display", display );
  			}
  		}
  	}
  
  	// Set the display of the elements in a second loop to avoid constant reflow
  	for ( index = 0; index < length; index++ ) {
  		if ( values[ index ] != null ) {
  			elements[ index ].style.display = values[ index ];
  		}
  	}
  
  	return elements;
  }
  
  jQuery.fn.extend( {
  	show: function() {
  		return showHide( this, true );
  	},
  	hide: function() {
  		return showHide( this );
  	},
  	toggle: function( state ) {
  		if ( typeof state === "boolean" ) {
  			return state ? this.show() : this.hide();
  		}
  
  		return this.each( function() {
  			if ( isHiddenWithinTree( this ) ) {
  				jQuery( this ).show();
  			} else {
  				jQuery( this ).hide();
  			}
  		} );
  	}
  } );
  var rcheckableType = ( /^(?:checkbox|radio)$/i );
  
  var rtagName = ( /<([a-z][^\/\0>\x20\t\r\n\f]+)/i );
  
  var rscriptType = ( /^$|^module$|\/(?:java|ecma)script/i );
  
  
  
  // We have to close these tags to support XHTML (#13200)
  var wrapMap = {
  
  	// Support: IE <=9 only
  	option: [ 1, "<select multiple='multiple'>", "</select>" ],
  
  	// XHTML parsers do not magically insert elements in the
  	// same way that tag soup parsers do. So we cannot shorten
  	// this by omitting <tbody> or other required elements.
  	thead: [ 1, "<table>", "</table>" ],
  	col: [ 2, "<table><colgroup>", "</colgroup></table>" ],
  	tr: [ 2, "<table><tbody>", "</tbody></table>" ],
  	td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],
  
  	_default: [ 0, "", "" ]
  };
  
  // Support: IE <=9 only
  wrapMap.optgroup = wrapMap.option;
  
  wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
  wrapMap.th = wrapMap.td;
  
  
  function getAll( context, tag ) {
  
  	// Support: IE <=9 - 11 only
  	// Use typeof to avoid zero-argument method invocation on host objects (#15151)
  	var ret;
  
  	if ( typeof context.getElementsByTagName !== "undefined" ) {
  		ret = context.getElementsByTagName( tag || "*" );
  
  	} else if ( typeof context.querySelectorAll !== "undefined" ) {
  		ret = context.querySelectorAll( tag || "*" );
  
  	} else {
  		ret = [];
  	}
  
  	if ( tag === undefined || tag && nodeName( context, tag ) ) {
  		return jQuery.merge( [ context ], ret );
  	}
  
  	return ret;
  }
  
  
  // Mark scripts as having already been evaluated
  function setGlobalEval( elems, refElements ) {
  	var i = 0,
  		l = elems.length;
  
  	for ( ; i < l; i++ ) {
  		dataPriv.set(
  			elems[ i ],
  			"globalEval",
  			!refElements || dataPriv.get( refElements[ i ], "globalEval" )
  		);
  	}
  }
  
  
  var rhtml = /<|&#?\w+;/;
  
  function buildFragment( elems, context, scripts, selection, ignored ) {
  	var elem, tmp, tag, wrap, contains, j,
  		fragment = context.createDocumentFragment(),
  		nodes = [],
  		i = 0,
  		l = elems.length;
  
  	for ( ; i < l; i++ ) {
  		elem = elems[ i ];
  
  		if ( elem || elem === 0 ) {
  
  			// Add nodes directly
  			if ( toType( elem ) === "object" ) {
  
  				// Support: Android <=4.0 only, PhantomJS 1 only
  				// push.apply(_, arraylike) throws on ancient WebKit
  				jQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );
  
  			// Convert non-html into a text node
  			} else if ( !rhtml.test( elem ) ) {
  				nodes.push( context.createTextNode( elem ) );
  
  			// Convert html into DOM nodes
  			} else {
  				tmp = tmp || fragment.appendChild( context.createElement( "div" ) );
  
  				// Deserialize a standard representation
  				tag = ( rtagName.exec( elem ) || [ "", "" ] )[ 1 ].toLowerCase();
  				wrap = wrapMap[ tag ] || wrapMap._default;
  				tmp.innerHTML = wrap[ 1 ] + jQuery.htmlPrefilter( elem ) + wrap[ 2 ];
  
  				// Descend through wrappers to the right content
  				j = wrap[ 0 ];
  				while ( j-- ) {
  					tmp = tmp.lastChild;
  				}
  
  				// Support: Android <=4.0 only, PhantomJS 1 only
  				// push.apply(_, arraylike) throws on ancient WebKit
  				jQuery.merge( nodes, tmp.childNodes );
  
  				// Remember the top-level container
  				tmp = fragment.firstChild;
  
  				// Ensure the created nodes are orphaned (#12392)
  				tmp.textContent = "";
  			}
  		}
  	}
  
  	// Remove wrapper from fragment
  	fragment.textContent = "";
  
  	i = 0;
  	while ( ( elem = nodes[ i++ ] ) ) {
  
  		// Skip elements already in the context collection (trac-4087)
  		if ( selection && jQuery.inArray( elem, selection ) > -1 ) {
  			if ( ignored ) {
  				ignored.push( elem );
  			}
  			continue;
  		}
  
  		contains = jQuery.contains( elem.ownerDocument, elem );
  
  		// Append to fragment
  		tmp = getAll( fragment.appendChild( elem ), "script" );
  
  		// Preserve script evaluation history
  		if ( contains ) {
  			setGlobalEval( tmp );
  		}
  
  		// Capture executables
  		if ( scripts ) {
  			j = 0;
  			while ( ( elem = tmp[ j++ ] ) ) {
  				if ( rscriptType.test( elem.type || "" ) ) {
  					scripts.push( elem );
  				}
  			}
  		}
  	}
  
  	return fragment;
  }
  
  
  ( function() {
  	var fragment = document.createDocumentFragment(),
  		div = fragment.appendChild( document.createElement( "div" ) ),
  		input = document.createElement( "input" );
  
  	// Support: Android 4.0 - 4.3 only
  	// Check state lost if the name is set (#11217)
  	// Support: Windows Web Apps (WWA)
  	// `name` and `type` must use .setAttribute for WWA (#14901)
  	input.setAttribute( "type", "radio" );
  	input.setAttribute( "checked", "checked" );
  	input.setAttribute( "name", "t" );
  
  	div.appendChild( input );
  
  	// Support: Android <=4.1 only
  	// Older WebKit doesn't clone checked state correctly in fragments
  	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
  
  	// Support: IE <=11 only
  	// Make sure textarea (and checkbox) defaultValue is properly cloned
  	div.innerHTML = "<textarea>x</textarea>";
  	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
  } )();
  var documentElement = document.documentElement;
  
  
  
  var
  	rkeyEvent = /^key/,
  	rmouseEvent = /^(?:mouse|pointer|contextmenu|drag|drop)|click/,
  	rtypenamespace = /^([^.]*)(?:\.(.+)|)/;
  
  function returnTrue() {
  	return true;
  }
  
  function returnFalse() {
  	return false;
  }
  
  // Support: IE <=9 only
  // See #13393 for more info
  function safeActiveElement() {
  	try {
  		return document.activeElement;
  	} catch ( err ) { }
  }
  
  function on( elem, types, selector, data, fn, one ) {
  	var origFn, type;
  
  	// Types can be a map of types/handlers
  	if ( typeof types === "object" ) {
  
  		// ( types-Object, selector, data )
  		if ( typeof selector !== "string" ) {
  
  			// ( types-Object, data )
  			data = data || selector;
  			selector = undefined;
  		}
  		for ( type in types ) {
  			on( elem, type, selector, data, types[ type ], one );
  		}
  		return elem;
  	}
  
  	if ( data == null && fn == null ) {
  
  		// ( types, fn )
  		fn = selector;
  		data = selector = undefined;
  	} else if ( fn == null ) {
  		if ( typeof selector === "string" ) {
  
  			// ( types, selector, fn )
  			fn = data;
  			data = undefined;
  		} else {
  
  			// ( types, data, fn )
  			fn = data;
  			data = selector;
  			selector = undefined;
  		}
  	}
  	if ( fn === false ) {
  		fn = returnFalse;
  	} else if ( !fn ) {
  		return elem;
  	}
  
  	if ( one === 1 ) {
  		origFn = fn;
  		fn = function( event ) {
  
  			// Can use an empty set, since event contains the info
  			jQuery().off( event );
  			return origFn.apply( this, arguments );
  		};
  
  		// Use same guid so caller can remove using origFn
  		fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
  	}
  	return elem.each( function() {
  		jQuery.event.add( this, types, fn, data, selector );
  	} );
  }
  
  /*
   * Helper functions for managing events -- not part of the public interface.
   * Props to Dean Edwards' addEvent library for many of the ideas.
   */
  jQuery.event = {
  
  	global: {},
  
  	add: function( elem, types, handler, data, selector ) {
  
  		var handleObjIn, eventHandle, tmp,
  			events, t, handleObj,
  			special, handlers, type, namespaces, origType,
  			elemData = dataPriv.get( elem );
  
  		// Don't attach events to noData or text/comment nodes (but allow plain objects)
  		if ( !elemData ) {
  			return;
  		}
  
  		// Caller can pass in an object of custom data in lieu of the handler
  		if ( handler.handler ) {
  			handleObjIn = handler;
  			handler = handleObjIn.handler;
  			selector = handleObjIn.selector;
  		}
  
  		// Ensure that invalid selectors throw exceptions at attach time
  		// Evaluate against documentElement in case elem is a non-element node (e.g., document)
  		if ( selector ) {
  			jQuery.find.matchesSelector( documentElement, selector );
  		}
  
  		// Make sure that the handler has a unique ID, used to find/remove it later
  		if ( !handler.guid ) {
  			handler.guid = jQuery.guid++;
  		}
  
  		// Init the element's event structure and main handler, if this is the first
  		if ( !( events = elemData.events ) ) {
  			events = elemData.events = {};
  		}
  		if ( !( eventHandle = elemData.handle ) ) {
  			eventHandle = elemData.handle = function( e ) {
  
  				// Discard the second event of a jQuery.event.trigger() and
  				// when an event is called after a page has unloaded
  				return typeof jQuery !== "undefined" && jQuery.event.triggered !== e.type ?
  					jQuery.event.dispatch.apply( elem, arguments ) : undefined;
  			};
  		}
  
  		// Handle multiple events separated by a space
  		types = ( types || "" ).match( rnothtmlwhite ) || [ "" ];
  		t = types.length;
  		while ( t-- ) {
  			tmp = rtypenamespace.exec( types[ t ] ) || [];
  			type = origType = tmp[ 1 ];
  			namespaces = ( tmp[ 2 ] || "" ).split( "." ).sort();
  
  			// There *must* be a type, no attaching namespace-only handlers
  			if ( !type ) {
  				continue;
  			}
  
  			// If event changes its type, use the special event handlers for the changed type
  			special = jQuery.event.special[ type ] || {};
  
  			// If selector defined, determine special event api type, otherwise given type
  			type = ( selector ? special.delegateType : special.bindType ) || type;
  
  			// Update special based on newly reset type
  			special = jQuery.event.special[ type ] || {};
  
  			// handleObj is passed to all event handlers
  			handleObj = jQuery.extend( {
  				type: type,
  				origType: origType,
  				data: data,
  				handler: handler,
  				guid: handler.guid,
  				selector: selector,
  				needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
  				namespace: namespaces.join( "." )
  			}, handleObjIn );
  
  			// Init the event handler queue if we're the first
  			if ( !( handlers = events[ type ] ) ) {
  				handlers = events[ type ] = [];
  				handlers.delegateCount = 0;
  
  				// Only use addEventListener if the special events handler returns false
  				if ( !special.setup ||
  					special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
  
  					if ( elem.addEventListener ) {
  						elem.addEventListener( type, eventHandle );
  					}
  				}
  			}
  
  			if ( special.add ) {
  				special.add.call( elem, handleObj );
  
  				if ( !handleObj.handler.guid ) {
  					handleObj.handler.guid = handler.guid;
  				}
  			}
  
  			// Add to the element's handler list, delegates in front
  			if ( selector ) {
  				handlers.splice( handlers.delegateCount++, 0, handleObj );
  			} else {
  				handlers.push( handleObj );
  			}
  
  			// Keep track of which events have ever been used, for event optimization
  			jQuery.event.global[ type ] = true;
  		}
  
  	},
  
  	// Detach an event or set of events from an element
  	remove: function( elem, types, handler, selector, mappedTypes ) {
  
  		var j, origCount, tmp,
  			events, t, handleObj,
  			special, handlers, type, namespaces, origType,
  			elemData = dataPriv.hasData( elem ) && dataPriv.get( elem );
  
  		if ( !elemData || !( events = elemData.events ) ) {
  			return;
  		}
  
  		// Once for each type.namespace in types; type may be omitted
  		types = ( types || "" ).match( rnothtmlwhite ) || [ "" ];
  		t = types.length;
  		while ( t-- ) {
  			tmp = rtypenamespace.exec( types[ t ] ) || [];
  			type = origType = tmp[ 1 ];
  			namespaces = ( tmp[ 2 ] || "" ).split( "." ).sort();
  
  			// Unbind all events (on this namespace, if provided) for the element
  			if ( !type ) {
  				for ( type in events ) {
  					jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
  				}
  				continue;
  			}
  
  			special = jQuery.event.special[ type ] || {};
  			type = ( selector ? special.delegateType : special.bindType ) || type;
  			handlers = events[ type ] || [];
  			tmp = tmp[ 2 ] &&
  				new RegExp( "(^|\\.)" + namespaces.join( "\\.(?:.*\\.|)" ) + "(\\.|$)" );
  
  			// Remove matching events
  			origCount = j = handlers.length;
  			while ( j-- ) {
  				handleObj = handlers[ j ];
  
  				if ( ( mappedTypes || origType === handleObj.origType ) &&
  					( !handler || handler.guid === handleObj.guid ) &&
  					( !tmp || tmp.test( handleObj.namespace ) ) &&
  					( !selector || selector === handleObj.selector ||
  						selector === "**" && handleObj.selector ) ) {
  					handlers.splice( j, 1 );
  
  					if ( handleObj.selector ) {
  						handlers.delegateCount--;
  					}
  					if ( special.remove ) {
  						special.remove.call( elem, handleObj );
  					}
  				}
  			}
  
  			// Remove generic event handler if we removed something and no more handlers exist
  			// (avoids potential for endless recursion during removal of special event handlers)
  			if ( origCount && !handlers.length ) {
  				if ( !special.teardown ||
  					special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
  
  					jQuery.removeEvent( elem, type, elemData.handle );
  				}
  
  				delete events[ type ];
  			}
  		}
  
  		// Remove data and the expando if it's no longer used
  		if ( jQuery.isEmptyObject( events ) ) {
  			dataPriv.remove( elem, "handle events" );
  		}
  	},
  
  	dispatch: function( nativeEvent ) {
  
  		// Make a writable jQuery.Event from the native event object
  		var event = jQuery.event.fix( nativeEvent );
  
  		var i, j, ret, matched, handleObj, handlerQueue,
  			args = new Array( arguments.length ),
  			handlers = ( dataPriv.get( this, "events" ) || {} )[ event.type ] || [],
  			special = jQuery.event.special[ event.type ] || {};
  
  		// Use the fix-ed jQuery.Event rather than the (read-only) native event
  		args[ 0 ] = event;
  
  		for ( i = 1; i < arguments.length; i++ ) {
  			args[ i ] = arguments[ i ];
  		}
  
  		event.delegateTarget = this;
  
  		// Call the preDispatch hook for the mapped type, and let it bail if desired
  		if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
  			return;
  		}
  
  		// Determine handlers
  		handlerQueue = jQuery.event.handlers.call( this, event, handlers );
  
  		// Run delegates first; they may want to stop propagation beneath us
  		i = 0;
  		while ( ( matched = handlerQueue[ i++ ] ) && !event.isPropagationStopped() ) {
  			event.currentTarget = matched.elem;
  
  			j = 0;
  			while ( ( handleObj = matched.handlers[ j++ ] ) &&
  				!event.isImmediatePropagationStopped() ) {
  
  				// Triggered event must either 1) have no namespace, or 2) have namespace(s)
  				// a subset or equal to those in the bound event (both can have no namespace).
  				if ( !event.rnamespace || event.rnamespace.test( handleObj.namespace ) ) {
  
  					event.handleObj = handleObj;
  					event.data = handleObj.data;
  
  					ret = ( ( jQuery.event.special[ handleObj.origType ] || {} ).handle ||
  						handleObj.handler ).apply( matched.elem, args );
  
  					if ( ret !== undefined ) {
  						if ( ( event.result = ret ) === false ) {
  							event.preventDefault();
  							event.stopPropagation();
  						}
  					}
  				}
  			}
  		}
  
  		// Call the postDispatch hook for the mapped type
  		if ( special.postDispatch ) {
  			special.postDispatch.call( this, event );
  		}
  
  		return event.result;
  	},
  
  	handlers: function( event, handlers ) {
  		var i, handleObj, sel, matchedHandlers, matchedSelectors,
  			handlerQueue = [],
  			delegateCount = handlers.delegateCount,
  			cur = event.target;
  
  		// Find delegate handlers
  		if ( delegateCount &&
  
  			// Support: IE <=9
  			// Black-hole SVG <use> instance trees (trac-13180)
  			cur.nodeType &&
  
  			// Support: Firefox <=42
  			// Suppress spec-violating clicks indicating a non-primary pointer button (trac-3861)
  			// https://www.w3.org/TR/DOM-Level-3-Events/#event-type-click
  			// Support: IE 11 only
  			// ...but not arrow key "clicks" of radio inputs, which can have `button` -1 (gh-2343)
  			!( event.type === "click" && event.button >= 1 ) ) {
  
  			for ( ; cur !== this; cur = cur.parentNode || this ) {
  
  				// Don't check non-elements (#13208)
  				// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)
  				if ( cur.nodeType === 1 && !( event.type === "click" && cur.disabled === true ) ) {
  					matchedHandlers = [];
  					matchedSelectors = {};
  					for ( i = 0; i < delegateCount; i++ ) {
  						handleObj = handlers[ i ];
  
  						// Don't conflict with Object.prototype properties (#13203)
  						sel = handleObj.selector + " ";
  
  						if ( matchedSelectors[ sel ] === undefined ) {
  							matchedSelectors[ sel ] = handleObj.needsContext ?
  								jQuery( sel, this ).index( cur ) > -1 :
  								jQuery.find( sel, this, null, [ cur ] ).length;
  						}
  						if ( matchedSelectors[ sel ] ) {
  							matchedHandlers.push( handleObj );
  						}
  					}
  					if ( matchedHandlers.length ) {
  						handlerQueue.push( { elem: cur, handlers: matchedHandlers } );
  					}
  				}
  			}
  		}
  
  		// Add the remaining (directly-bound) handlers
  		cur = this;
  		if ( delegateCount < handlers.length ) {
  			handlerQueue.push( { elem: cur, handlers: handlers.slice( delegateCount ) } );
  		}
  
  		return handlerQueue;
  	},
  
  	addProp: function( name, hook ) {
  		Object.defineProperty( jQuery.Event.prototype, name, {
  			enumerable: true,
  			configurable: true,
  
  			get: isFunction( hook ) ?
  				function() {
  					if ( this.originalEvent ) {
  							return hook( this.originalEvent );
  					}
  				} :
  				function() {
  					if ( this.originalEvent ) {
  							return this.originalEvent[ name ];
  					}
  				},
  
  			set: function( value ) {
  				Object.defineProperty( this, name, {
  					enumerable: true,
  					configurable: true,
  					writable: true,
  					value: value
  				} );
  			}
  		} );
  	},
  
  	fix: function( originalEvent ) {
  		return originalEvent[ jQuery.expando ] ?
  			originalEvent :
  			new jQuery.Event( originalEvent );
  	},
  
  	special: {
  		load: {
  
  			// Prevent triggered image.load events from bubbling to window.load
  			noBubble: true
  		},
  		focus: {
  
  			// Fire native event if possible so blur/focus sequence is correct
  			trigger: function() {
  				if ( this !== safeActiveElement() && this.focus ) {
  					this.focus();
  					return false;
  				}
  			},
  			delegateType: "focusin"
  		},
  		blur: {
  			trigger: function() {
  				if ( this === safeActiveElement() && this.blur ) {
  					this.blur();
  					return false;
  				}
  			},
  			delegateType: "focusout"
  		},
  		click: {
  
  			// For checkbox, fire native event so checked state will be right
  			trigger: function() {
  				if ( this.type === "checkbox" && this.click && nodeName( this, "input" ) ) {
  					this.click();
  					return false;
  				}
  			},
  
  			// For cross-browser consistency, don't fire native .click() on links
  			_default: function( event ) {
  				return nodeName( event.target, "a" );
  			}
  		},
  
  		beforeunload: {
  			postDispatch: function( event ) {
  
  				// Support: Firefox 20+
  				// Firefox doesn't alert if the returnValue field is not set.
  				if ( event.result !== undefined && event.originalEvent ) {
  					event.originalEvent.returnValue = event.result;
  				}
  			}
  		}
  	}
  };
  
  jQuery.removeEvent = function( elem, type, handle ) {
  
  	// This "if" is needed for plain objects
  	if ( elem.removeEventListener ) {
  		elem.removeEventListener( type, handle );
  	}
  };
  
  jQuery.Event = function( src, props ) {
  
  	// Allow instantiation without the 'new' keyword
  	if ( !( this instanceof jQuery.Event ) ) {
  		return new jQuery.Event( src, props );
  	}
  
  	// Event object
  	if ( src && src.type ) {
  		this.originalEvent = src;
  		this.type = src.type;
  
  		// Events bubbling up the document may have been marked as prevented
  		// by a handler lower down the tree; reflect the correct value.
  		this.isDefaultPrevented = src.defaultPrevented ||
  				src.defaultPrevented === undefined &&
  
  				// Support: Android <=2.3 only
  				src.returnValue === false ?
  			returnTrue :
  			returnFalse;
  
  		// Create target properties
  		// Support: Safari <=6 - 7 only
  		// Target should not be a text node (#504, #13143)
  		this.target = ( src.target && src.target.nodeType === 3 ) ?
  			src.target.parentNode :
  			src.target;
  
  		this.currentTarget = src.currentTarget;
  		this.relatedTarget = src.relatedTarget;
  
  	// Event type
  	} else {
  		this.type = src;
  	}
  
  	// Put explicitly provided properties onto the event object
  	if ( props ) {
  		jQuery.extend( this, props );
  	}
  
  	// Create a timestamp if incoming event doesn't have one
  	this.timeStamp = src && src.timeStamp || Date.now();
  
  	// Mark it as fixed
  	this[ jQuery.expando ] = true;
  };
  
  // jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
  // https://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
  jQuery.Event.prototype = {
  	constructor: jQuery.Event,
  	isDefaultPrevented: returnFalse,
  	isPropagationStopped: returnFalse,
  	isImmediatePropagationStopped: returnFalse,
  	isSimulated: false,
  
  	preventDefault: function() {
  		var e = this.originalEvent;
  
  		this.isDefaultPrevented = returnTrue;
  
  		if ( e && !this.isSimulated ) {
  			e.preventDefault();
  		}
  	},
  	stopPropagation: function() {
  		var e = this.originalEvent;
  
  		this.isPropagationStopped = returnTrue;
  
  		if ( e && !this.isSimulated ) {
  			e.stopPropagation();
  		}
  	},
  	stopImmediatePropagation: function() {
  		var e = this.originalEvent;
  
  		this.isImmediatePropagationStopped = returnTrue;
  
  		if ( e && !this.isSimulated ) {
  			e.stopImmediatePropagation();
  		}
  
  		this.stopPropagation();
  	}
  };
  
  // Includes all common event props including KeyEvent and MouseEvent specific props
  jQuery.each( {
  	altKey: true,
  	bubbles: true,
  	cancelable: true,
  	changedTouches: true,
  	ctrlKey: true,
  	detail: true,
  	eventPhase: true,
  	metaKey: true,
  	pageX: true,
  	pageY: true,
  	shiftKey: true,
  	view: true,
  	"char": true,
  	charCode: true,
  	key: true,
  	keyCode: true,
  	button: true,
  	buttons: true,
  	clientX: true,
  	clientY: true,
  	offsetX: true,
  	offsetY: true,
  	pointerId: true,
  	pointerType: true,
  	screenX: true,
  	screenY: true,
  	targetTouches: true,
  	toElement: true,
  	touches: true,
  
  	which: function( event ) {
  		var button = event.button;
  
  		// Add which for key events
  		if ( event.which == null && rkeyEvent.test( event.type ) ) {
  			return event.charCode != null ? event.charCode : event.keyCode;
  		}
  
  		// Add which for click: 1 === left; 2 === middle; 3 === right
  		if ( !event.which && button !== undefined && rmouseEvent.test( event.type ) ) {
  			if ( button & 1 ) {
  				return 1;
  			}
  
  			if ( button & 2 ) {
  				return 3;
  			}
  
  			if ( button & 4 ) {
  				return 2;
  			}
  
  			return 0;
  		}
  
  		return event.which;
  	}
  }, jQuery.event.addProp );
  
  // Create mouseenter/leave events using mouseover/out and event-time checks
  // so that event delegation works in jQuery.
  // Do the same for pointerenter/pointerleave and pointerover/pointerout
  //
  // Support: Safari 7 only
  // Safari sends mouseenter too often; see:
  // https://bugs.chromium.org/p/chromium/issues/detail?id=470258
  // for the description of the bug (it existed in older Chrome versions as well).
  jQuery.each( {
  	mouseenter: "mouseover",
  	mouseleave: "mouseout",
  	pointerenter: "pointerover",
  	pointerleave: "pointerout"
  }, function( orig, fix ) {
  	jQuery.event.special[ orig ] = {
  		delegateType: fix,
  		bindType: fix,
  
  		handle: function( event ) {
  			var ret,
  				target = this,
  				related = event.relatedTarget,
  				handleObj = event.handleObj;
  
  			// For mouseenter/leave call the handler if related is outside the target.
  			// NB: No relatedTarget if the mouse left/entered the browser window
  			if ( !related || ( related !== target && !jQuery.contains( target, related ) ) ) {
  				event.type = handleObj.origType;
  				ret = handleObj.handler.apply( this, arguments );
  				event.type = fix;
  			}
  			return ret;
  		}
  	};
  } );
  
  jQuery.fn.extend( {
  
  	on: function( types, selector, data, fn ) {
  		return on( this, types, selector, data, fn );
  	},
  	one: function( types, selector, data, fn ) {
  		return on( this, types, selector, data, fn, 1 );
  	},
  	off: function( types, selector, fn ) {
  		var handleObj, type;
  		if ( types && types.preventDefault && types.handleObj ) {
  
  			// ( event )  dispatched jQuery.Event
  			handleObj = types.handleObj;
  			jQuery( types.delegateTarget ).off(
  				handleObj.namespace ?
  					handleObj.origType + "." + handleObj.namespace :
  					handleObj.origType,
  				handleObj.selector,
  				handleObj.handler
  			);
  			return this;
  		}
  		if ( typeof types === "object" ) {
  
  			// ( types-object [, selector] )
  			for ( type in types ) {
  				this.off( type, selector, types[ type ] );
  			}
  			return this;
  		}
  		if ( selector === false || typeof selector === "function" ) {
  
  			// ( types [, fn] )
  			fn = selector;
  			selector = undefined;
  		}
  		if ( fn === false ) {
  			fn = returnFalse;
  		}
  		return this.each( function() {
  			jQuery.event.remove( this, types, fn, selector );
  		} );
  	}
  } );
  
  
  var
  
  	/* eslint-disable max-len */
  
  	// See https://github.com/eslint/eslint/issues/3229
  	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([a-z][^\/\0>\x20\t\r\n\f]*)[^>]*)\/>/gi,
  
  	/* eslint-enable */
  
  	// Support: IE <=10 - 11, Edge 12 - 13 only
  	// In IE/Edge using regex groups here causes severe slowdowns.
  	// See https://connect.microsoft.com/IE/feedback/details/1736512/
  	rnoInnerhtml = /<script|<style|<link/i,
  
  	// checked="checked" or checked
  	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
  	rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g;
  
  // Prefer a tbody over its parent table for containing new rows
  function manipulationTarget( elem, content ) {
  	if ( nodeName( elem, "table" ) &&
  		nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ) {
  
  		return jQuery( elem ).children( "tbody" )[ 0 ] || elem;
  	}
  
  	return elem;
  }
  
  // Replace/restore the type attribute of script elements for safe DOM manipulation
  function disableScript( elem ) {
  	elem.type = ( elem.getAttribute( "type" ) !== null ) + "/" + elem.type;
  	return elem;
  }
  function restoreScript( elem ) {
  	if ( ( elem.type || "" ).slice( 0, 5 ) === "true/" ) {
  		elem.type = elem.type.slice( 5 );
  	} else {
  		elem.removeAttribute( "type" );
  	}
  
  	return elem;
  }
  
  function cloneCopyEvent( src, dest ) {
  	var i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;
  
  	if ( dest.nodeType !== 1 ) {
  		return;
  	}
  
  	// 1. Copy private data: events, handlers, etc.
  	if ( dataPriv.hasData( src ) ) {
  		pdataOld = dataPriv.access( src );
  		pdataCur = dataPriv.set( dest, pdataOld );
  		events = pdataOld.events;
  
  		if ( events ) {
  			delete pdataCur.handle;
  			pdataCur.events = {};
  
  			for ( type in events ) {
  				for ( i = 0, l = events[ type ].length; i < l; i++ ) {
  					jQuery.event.add( dest, type, events[ type ][ i ] );
  				}
  			}
  		}
  	}
  
  	// 2. Copy user data
  	if ( dataUser.hasData( src ) ) {
  		udataOld = dataUser.access( src );
  		udataCur = jQuery.extend( {}, udataOld );
  
  		dataUser.set( dest, udataCur );
  	}
  }
  
  // Fix IE bugs, see support tests
  function fixInput( src, dest ) {
  	var nodeName = dest.nodeName.toLowerCase();
  
  	// Fails to persist the checked state of a cloned checkbox or radio button.
  	if ( nodeName === "input" && rcheckableType.test( src.type ) ) {
  		dest.checked = src.checked;
  
  	// Fails to return the selected option to the default selected state when cloning options
  	} else if ( nodeName === "input" || nodeName === "textarea" ) {
  		dest.defaultValue = src.defaultValue;
  	}
  }
  
  function domManip( collection, args, callback, ignored ) {
  
  	// Flatten any nested arrays
  	args = concat.apply( [], args );
  
  	var fragment, first, scripts, hasScripts, node, doc,
  		i = 0,
  		l = collection.length,
  		iNoClone = l - 1,
  		value = args[ 0 ],
  		valueIsFunction = isFunction( value );
  
  	// We can't cloneNode fragments that contain checked, in WebKit
  	if ( valueIsFunction ||
  			( l > 1 && typeof value === "string" &&
  				!support.checkClone && rchecked.test( value ) ) ) {
  		return collection.each( function( index ) {
  			var self = collection.eq( index );
  			if ( valueIsFunction ) {
  				args[ 0 ] = value.call( this, index, self.html() );
  			}
  			domManip( self, args, callback, ignored );
  		} );
  	}
  
  	if ( l ) {
  		fragment = buildFragment( args, collection[ 0 ].ownerDocument, false, collection, ignored );
  		first = fragment.firstChild;
  
  		if ( fragment.childNodes.length === 1 ) {
  			fragment = first;
  		}
  
  		// Require either new content or an interest in ignored elements to invoke the callback
  		if ( first || ignored ) {
  			scripts = jQuery.map( getAll( fragment, "script" ), disableScript );
  			hasScripts = scripts.length;
  
  			// Use the original fragment for the last item
  			// instead of the first because it can end up
  			// being emptied incorrectly in certain situations (#8070).
  			for ( ; i < l; i++ ) {
  				node = fragment;
  
  				if ( i !== iNoClone ) {
  					node = jQuery.clone( node, true, true );
  
  					// Keep references to cloned scripts for later restoration
  					if ( hasScripts ) {
  
  						// Support: Android <=4.0 only, PhantomJS 1 only
  						// push.apply(_, arraylike) throws on ancient WebKit
  						jQuery.merge( scripts, getAll( node, "script" ) );
  					}
  				}
  
  				callback.call( collection[ i ], node, i );
  			}
  
  			if ( hasScripts ) {
  				doc = scripts[ scripts.length - 1 ].ownerDocument;
  
  				// Reenable scripts
  				jQuery.map( scripts, restoreScript );
  
  				// Evaluate executable scripts on first document insertion
  				for ( i = 0; i < hasScripts; i++ ) {
  					node = scripts[ i ];
  					if ( rscriptType.test( node.type || "" ) &&
  						!dataPriv.access( node, "globalEval" ) &&
  						jQuery.contains( doc, node ) ) {
  
  						if ( node.src && ( node.type || "" ).toLowerCase()  !== "module" ) {
  
  							// Optional AJAX dependency, but won't run scripts if not present
  							if ( jQuery._evalUrl ) {
  								jQuery._evalUrl( node.src );
  							}
  						} else {
  							DOMEval( node.textContent.replace( rcleanScript, "" ), doc, node );
  						}
  					}
  				}
  			}
  		}
  	}
  
  	return collection;
  }
  
  function remove( elem, selector, keepData ) {
  	var node,
  		nodes = selector ? jQuery.filter( selector, elem ) : elem,
  		i = 0;
  
  	for ( ; ( node = nodes[ i ] ) != null; i++ ) {
  		if ( !keepData && node.nodeType === 1 ) {
  			jQuery.cleanData( getAll( node ) );
  		}
  
  		if ( node.parentNode ) {
  			if ( keepData && jQuery.contains( node.ownerDocument, node ) ) {
  				setGlobalEval( getAll( node, "script" ) );
  			}
  			node.parentNode.removeChild( node );
  		}
  	}
  
  	return elem;
  }
  
  jQuery.extend( {
  	htmlPrefilter: function( html ) {
  		return html.replace( rxhtmlTag, "<$1></$2>" );
  	},
  
  	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
  		var i, l, srcElements, destElements,
  			clone = elem.cloneNode( true ),
  			inPage = jQuery.contains( elem.ownerDocument, elem );
  
  		// Fix IE cloning issues
  		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
  				!jQuery.isXMLDoc( elem ) ) {
  
  			// We eschew Sizzle here for performance reasons: https://jsperf.com/getall-vs-sizzle/2
  			destElements = getAll( clone );
  			srcElements = getAll( elem );
  
  			for ( i = 0, l = srcElements.length; i < l; i++ ) {
  				fixInput( srcElements[ i ], destElements[ i ] );
  			}
  		}
  
  		// Copy the events from the original to the clone
  		if ( dataAndEvents ) {
  			if ( deepDataAndEvents ) {
  				srcElements = srcElements || getAll( elem );
  				destElements = destElements || getAll( clone );
  
  				for ( i = 0, l = srcElements.length; i < l; i++ ) {
  					cloneCopyEvent( srcElements[ i ], destElements[ i ] );
  				}
  			} else {
  				cloneCopyEvent( elem, clone );
  			}
  		}
  
  		// Preserve script evaluation history
  		destElements = getAll( clone, "script" );
  		if ( destElements.length > 0 ) {
  			setGlobalEval( destElements, !inPage && getAll( elem, "script" ) );
  		}
  
  		// Return the cloned set
  		return clone;
  	},
  
  	cleanData: function( elems ) {
  		var data, elem, type,
  			special = jQuery.event.special,
  			i = 0;
  
  		for ( ; ( elem = elems[ i ] ) !== undefined; i++ ) {
  			if ( acceptData( elem ) ) {
  				if ( ( data = elem[ dataPriv.expando ] ) ) {
  					if ( data.events ) {
  						for ( type in data.events ) {
  							if ( special[ type ] ) {
  								jQuery.event.remove( elem, type );
  
  							// This is a shortcut to avoid jQuery.event.remove's overhead
  							} else {
  								jQuery.removeEvent( elem, type, data.handle );
  							}
  						}
  					}
  
  					// Support: Chrome <=35 - 45+
  					// Assign undefined instead of using delete, see Data#remove
  					elem[ dataPriv.expando ] = undefined;
  				}
  				if ( elem[ dataUser.expando ] ) {
  
  					// Support: Chrome <=35 - 45+
  					// Assign undefined instead of using delete, see Data#remove
  					elem[ dataUser.expando ] = undefined;
  				}
  			}
  		}
  	}
  } );
  
  jQuery.fn.extend( {
  	detach: function( selector ) {
  		return remove( this, selector, true );
  	},
  
  	remove: function( selector ) {
  		return remove( this, selector );
  	},
  
  	text: function( value ) {
  		return access( this, function( value ) {
  			return value === undefined ?
  				jQuery.text( this ) :
  				this.empty().each( function() {
  					if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
  						this.textContent = value;
  					}
  				} );
  		}, null, value, arguments.length );
  	},
  
  	append: function() {
  		return domManip( this, arguments, function( elem ) {
  			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
  				var target = manipulationTarget( this, elem );
  				target.appendChild( elem );
  			}
  		} );
  	},
  
  	prepend: function() {
  		return domManip( this, arguments, function( elem ) {
  			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
  				var target = manipulationTarget( this, elem );
  				target.insertBefore( elem, target.firstChild );
  			}
  		} );
  	},
  
  	before: function() {
  		return domManip( this, arguments, function( elem ) {
  			if ( this.parentNode ) {
  				this.parentNode.insertBefore( elem, this );
  			}
  		} );
  	},
  
  	after: function() {
  		return domManip( this, arguments, function( elem ) {
  			if ( this.parentNode ) {
  				this.parentNode.insertBefore( elem, this.nextSibling );
  			}
  		} );
  	},
  
  	empty: function() {
  		var elem,
  			i = 0;
  
  		for ( ; ( elem = this[ i ] ) != null; i++ ) {
  			if ( elem.nodeType === 1 ) {
  
  				// Prevent memory leaks
  				jQuery.cleanData( getAll( elem, false ) );
  
  				// Remove any remaining nodes
  				elem.textContent = "";
  			}
  		}
  
  		return this;
  	},
  
  	clone: function( dataAndEvents, deepDataAndEvents ) {
  		dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
  		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;
  
  		return this.map( function() {
  			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
  		} );
  	},
  
  	html: function( value ) {
  		return access( this, function( value ) {
  			var elem = this[ 0 ] || {},
  				i = 0,
  				l = this.length;
  
  			if ( value === undefined && elem.nodeType === 1 ) {
  				return elem.innerHTML;
  			}
  
  			// See if we can take a shortcut and just use innerHTML
  			if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
  				!wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1 ].toLowerCase() ] ) {
  
  				value = jQuery.htmlPrefilter( value );
  
  				try {
  					for ( ; i < l; i++ ) {
  						elem = this[ i ] || {};
  
  						// Remove element nodes and prevent memory leaks
  						if ( elem.nodeType === 1 ) {
  							jQuery.cleanData( getAll( elem, false ) );
  							elem.innerHTML = value;
  						}
  					}
  
  					elem = 0;
  
  				// If using innerHTML throws an exception, use the fallback method
  				} catch ( e ) {}
  			}
  
  			if ( elem ) {
  				this.empty().append( value );
  			}
  		}, null, value, arguments.length );
  	},
  
  	replaceWith: function() {
  		var ignored = [];
  
  		// Make the changes, replacing each non-ignored context element with the new content
  		return domManip( this, arguments, function( elem ) {
  			var parent = this.parentNode;
  
  			if ( jQuery.inArray( this, ignored ) < 0 ) {
  				jQuery.cleanData( getAll( this ) );
  				if ( parent ) {
  					parent.replaceChild( elem, this );
  				}
  			}
  
  		// Force callback invocation
  		}, ignored );
  	}
  } );
  
  jQuery.each( {
  	appendTo: "append",
  	prependTo: "prepend",
  	insertBefore: "before",
  	insertAfter: "after",
  	replaceAll: "replaceWith"
  }, function( name, original ) {
  	jQuery.fn[ name ] = function( selector ) {
  		var elems,
  			ret = [],
  			insert = jQuery( selector ),
  			last = insert.length - 1,
  			i = 0;
  
  		for ( ; i <= last; i++ ) {
  			elems = i === last ? this : this.clone( true );
  			jQuery( insert[ i ] )[ original ]( elems );
  
  			// Support: Android <=4.0 only, PhantomJS 1 only
  			// .get() because push.apply(_, arraylike) throws on ancient WebKit
  			push.apply( ret, elems.get() );
  		}
  
  		return this.pushStack( ret );
  	};
  } );
  var rnumnonpx = new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );
  
  var getStyles = function( elem ) {
  
  		// Support: IE <=11 only, Firefox <=30 (#15098, #14150)
  		// IE throws on elements created in popups
  		// FF meanwhile throws on frame elements through "defaultView.getComputedStyle"
  		var view = elem.ownerDocument.defaultView;
  
  		if ( !view || !view.opener ) {
  			view = window;
  		}
  
  		return view.getComputedStyle( elem );
  	};
  
  var rboxStyle = new RegExp( cssExpand.join( "|" ), "i" );
  
  
  
  ( function() {
  
  	// Executing both pixelPosition & boxSizingReliable tests require only one layout
  	// so they're executed at the same time to save the second computation.
  	function computeStyleTests() {
  
  		// This is a singleton, we need to execute it only once
  		if ( !div ) {
  			return;
  		}
  
  		container.style.cssText = "position:absolute;left:-11111px;width:60px;" +
  			"margin-top:1px;padding:0;border:0";
  		div.style.cssText =
  			"position:relative;display:block;box-sizing:border-box;overflow:scroll;" +
  			"margin:auto;border:1px;padding:1px;" +
  			"width:60%;top:1%";
  		documentElement.appendChild( container ).appendChild( div );
  
  		var divStyle = window.getComputedStyle( div );
  		pixelPositionVal = divStyle.top !== "1%";
  
  		// Support: Android 4.0 - 4.3 only, Firefox <=3 - 44
  		reliableMarginLeftVal = roundPixelMeasures( divStyle.marginLeft ) === 12;
  
  		// Support: Android 4.0 - 4.3 only, Safari <=9.1 - 10.1, iOS <=7.0 - 9.3
  		// Some styles come back with percentage values, even though they shouldn't
  		div.style.right = "60%";
  		pixelBoxStylesVal = roundPixelMeasures( divStyle.right ) === 36;
  
  		// Support: IE 9 - 11 only
  		// Detect misreporting of content dimensions for box-sizing:border-box elements
  		boxSizingReliableVal = roundPixelMeasures( divStyle.width ) === 36;
  
  		// Support: IE 9 only
  		// Detect overflow:scroll screwiness (gh-3699)
  		div.style.position = "absolute";
  		scrollboxSizeVal = div.offsetWidth === 36 || "absolute";
  
  		documentElement.removeChild( container );
  
  		// Nullify the div so it wouldn't be stored in the memory and
  		// it will also be a sign that checks already performed
  		div = null;
  	}
  
  	function roundPixelMeasures( measure ) {
  		return Math.round( parseFloat( measure ) );
  	}
  
  	var pixelPositionVal, boxSizingReliableVal, scrollboxSizeVal, pixelBoxStylesVal,
  		reliableMarginLeftVal,
  		container = document.createElement( "div" ),
  		div = document.createElement( "div" );
  
  	// Finish early in limited (non-browser) environments
  	if ( !div.style ) {
  		return;
  	}
  
  	// Support: IE <=9 - 11 only
  	// Style of cloned element affects source element cloned (#8908)
  	div.style.backgroundClip = "content-box";
  	div.cloneNode( true ).style.backgroundClip = "";
  	support.clearCloneStyle = div.style.backgroundClip === "content-box";
  
  	jQuery.extend( support, {
  		boxSizingReliable: function() {
  			computeStyleTests();
  			return boxSizingReliableVal;
  		},
  		pixelBoxStyles: function() {
  			computeStyleTests();
  			return pixelBoxStylesVal;
  		},
  		pixelPosition: function() {
  			computeStyleTests();
  			return pixelPositionVal;
  		},
  		reliableMarginLeft: function() {
  			computeStyleTests();
  			return reliableMarginLeftVal;
  		},
  		scrollboxSize: function() {
  			computeStyleTests();
  			return scrollboxSizeVal;
  		}
  	} );
  } )();
  
  
  function curCSS( elem, name, computed ) {
  	var width, minWidth, maxWidth, ret,
  
  		// Support: Firefox 51+
  		// Retrieving style before computed somehow
  		// fixes an issue with getting wrong values
  		// on detached elements
  		style = elem.style;
  
  	computed = computed || getStyles( elem );
  
  	// getPropertyValue is needed for:
  	//   .css('filter') (IE 9 only, #12537)
  	//   .css('--customProperty) (#3144)
  	if ( computed ) {
  		ret = computed.getPropertyValue( name ) || computed[ name ];
  
  		if ( ret === "" && !jQuery.contains( elem.ownerDocument, elem ) ) {
  			ret = jQuery.style( elem, name );
  		}
  
  		// A tribute to the "awesome hack by Dean Edwards"
  		// Android Browser returns percentage for some values,
  		// but width seems to be reliably pixels.
  		// This is against the CSSOM draft spec:
  		// https://drafts.csswg.org/cssom/#resolved-values
  		if ( !support.pixelBoxStyles() && rnumnonpx.test( ret ) && rboxStyle.test( name ) ) {
  
  			// Remember the original values
  			width = style.width;
  			minWidth = style.minWidth;
  			maxWidth = style.maxWidth;
  
  			// Put in the new values to get a computed value out
  			style.minWidth = style.maxWidth = style.width = ret;
  			ret = computed.width;
  
  			// Revert the changed values
  			style.width = width;
  			style.minWidth = minWidth;
  			style.maxWidth = maxWidth;
  		}
  	}
  
  	return ret !== undefined ?
  
  		// Support: IE <=9 - 11 only
  		// IE returns zIndex value as an integer.
  		ret + "" :
  		ret;
  }
  
  
  function addGetHookIf( conditionFn, hookFn ) {
  
  	// Define the hook, we'll check on the first run if it's really needed.
  	return {
  		get: function() {
  			if ( conditionFn() ) {
  
  				// Hook not needed (or it's not possible to use it due
  				// to missing dependency), remove it.
  				delete this.get;
  				return;
  			}
  
  			// Hook needed; redefine it so that the support test is not executed again.
  			return ( this.get = hookFn ).apply( this, arguments );
  		}
  	};
  }
  
  
  var
  
  	// Swappable if display is none or starts with table
  	// except "table", "table-cell", or "table-caption"
  	// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
  	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
  	rcustomProp = /^--/,
  	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
  	cssNormalTransform = {
  		letterSpacing: "0",
  		fontWeight: "400"
  	},
  
  	cssPrefixes = [ "Webkit", "Moz", "ms" ],
  	emptyStyle = document.createElement( "div" ).style;
  
  // Return a css property mapped to a potentially vendor prefixed property
  function vendorPropName( name ) {
  
  	// Shortcut for names that are not vendor prefixed
  	if ( name in emptyStyle ) {
  		return name;
  	}
  
  	// Check for vendor prefixed names
  	var capName = name[ 0 ].toUpperCase() + name.slice( 1 ),
  		i = cssPrefixes.length;
  
  	while ( i-- ) {
  		name = cssPrefixes[ i ] + capName;
  		if ( name in emptyStyle ) {
  			return name;
  		}
  	}
  }
  
  // Return a property mapped along what jQuery.cssProps suggests or to
  // a vendor prefixed property.
  function finalPropName( name ) {
  	var ret = jQuery.cssProps[ name ];
  	if ( !ret ) {
  		ret = jQuery.cssProps[ name ] = vendorPropName( name ) || name;
  	}
  	return ret;
  }
  
  function setPositiveNumber( elem, value, subtract ) {
  
  	// Any relative (+/-) values have already been
  	// normalized at this point
  	var matches = rcssNum.exec( value );
  	return matches ?
  
  		// Guard against undefined "subtract", e.g., when used as in cssHooks
  		Math.max( 0, matches[ 2 ] - ( subtract || 0 ) ) + ( matches[ 3 ] || "px" ) :
  		value;
  }
  
  function boxModelAdjustment( elem, dimension, box, isBorderBox, styles, computedVal ) {
  	var i = dimension === "width" ? 1 : 0,
  		extra = 0,
  		delta = 0;
  
  	// Adjustment may not be necessary
  	if ( box === ( isBorderBox ? "border" : "content" ) ) {
  		return 0;
  	}
  
  	for ( ; i < 4; i += 2 ) {
  
  		// Both box models exclude margin
  		if ( box === "margin" ) {
  			delta += jQuery.css( elem, box + cssExpand[ i ], true, styles );
  		}
  
  		// If we get here with a content-box, we're seeking "padding" or "border" or "margin"
  		if ( !isBorderBox ) {
  
  			// Add padding
  			delta += jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
  
  			// For "border" or "margin", add border
  			if ( box !== "padding" ) {
  				delta += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
  
  			// But still keep track of it otherwise
  			} else {
  				extra += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
  			}
  
  		// If we get here with a border-box (content + padding + border), we're seeking "content" or
  		// "padding" or "margin"
  		} else {
  
  			// For "content", subtract padding
  			if ( box === "content" ) {
  				delta -= jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
  			}
  
  			// For "content" or "padding", subtract border
  			if ( box !== "margin" ) {
  				delta -= jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
  			}
  		}
  	}
  
  	// Account for positive content-box scroll gutter when requested by providing computedVal
  	if ( !isBorderBox && computedVal >= 0 ) {
  
  		// offsetWidth/offsetHeight is a rounded sum of content, padding, scroll gutter, and border
  		// Assuming integer scroll gutter, subtract the rest and round down
  		delta += Math.max( 0, Math.ceil(
  			elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -
  			computedVal -
  			delta -
  			extra -
  			0.5
  		) );
  	}
  
  	return delta;
  }
  
  function getWidthOrHeight( elem, dimension, extra ) {
  
  	// Start with computed style
  	var styles = getStyles( elem ),
  		val = curCSS( elem, dimension, styles ),
  		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
  		valueIsBorderBox = isBorderBox;
  
  	// Support: Firefox <=54
  	// Return a confounding non-pixel value or feign ignorance, as appropriate.
  	if ( rnumnonpx.test( val ) ) {
  		if ( !extra ) {
  			return val;
  		}
  		val = "auto";
  	}
  
  	// Check for style in case a browser which returns unreliable values
  	// for getComputedStyle silently falls back to the reliable elem.style
  	valueIsBorderBox = valueIsBorderBox &&
  		( support.boxSizingReliable() || val === elem.style[ dimension ] );
  
  	// Fall back to offsetWidth/offsetHeight when value is "auto"
  	// This happens for inline elements with no explicit setting (gh-3571)
  	// Support: Android <=4.1 - 4.3 only
  	// Also use offsetWidth/offsetHeight for misreported inline dimensions (gh-3602)
  	if ( val === "auto" ||
  		!parseFloat( val ) && jQuery.css( elem, "display", false, styles ) === "inline" ) {
  
  		val = elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ];
  
  		// offsetWidth/offsetHeight provide border-box values
  		valueIsBorderBox = true;
  	}
  
  	// Normalize "" and auto
  	val = parseFloat( val ) || 0;
  
  	// Adjust for the element's box model
  	return ( val +
  		boxModelAdjustment(
  			elem,
  			dimension,
  			extra || ( isBorderBox ? "border" : "content" ),
  			valueIsBorderBox,
  			styles,
  
  			// Provide the current computed size to request scroll gutter calculation (gh-3589)
  			val
  		)
  	) + "px";
  }
  
  jQuery.extend( {
  
  	// Add in style property hooks for overriding the default
  	// behavior of getting and setting a style property
  	cssHooks: {
  		opacity: {
  			get: function( elem, computed ) {
  				if ( computed ) {
  
  					// We should always get a number back from opacity
  					var ret = curCSS( elem, "opacity" );
  					return ret === "" ? "1" : ret;
  				}
  			}
  		}
  	},
  
  	// Don't automatically add "px" to these possibly-unitless properties
  	cssNumber: {
  		"animationIterationCount": true,
  		"columnCount": true,
  		"fillOpacity": true,
  		"flexGrow": true,
  		"flexShrink": true,
  		"fontWeight": true,
  		"lineHeight": true,
  		"opacity": true,
  		"order": true,
  		"orphans": true,
  		"widows": true,
  		"zIndex": true,
  		"zoom": true
  	},
  
  	// Add in properties whose names you wish to fix before
  	// setting or getting the value
  	cssProps: {},
  
  	// Get and set the style property on a DOM Node
  	style: function( elem, name, value, extra ) {
  
  		// Don't set styles on text and comment nodes
  		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
  			return;
  		}
  
  		// Make sure that we're working with the right name
  		var ret, type, hooks,
  			origName = camelCase( name ),
  			isCustomProp = rcustomProp.test( name ),
  			style = elem.style;
  
  		// Make sure that we're working with the right name. We don't
  		// want to query the value if it is a CSS custom property
  		// since they are user-defined.
  		if ( !isCustomProp ) {
  			name = finalPropName( origName );
  		}
  
  		// Gets hook for the prefixed version, then unprefixed version
  		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
  
  		// Check if we're setting a value
  		if ( value !== undefined ) {
  			type = typeof value;
  
  			// Convert "+=" or "-=" to relative numbers (#7345)
  			if ( type === "string" && ( ret = rcssNum.exec( value ) ) && ret[ 1 ] ) {
  				value = adjustCSS( elem, name, ret );
  
  				// Fixes bug #9237
  				type = "number";
  			}
  
  			// Make sure that null and NaN values aren't set (#7116)
  			if ( value == null || value !== value ) {
  				return;
  			}
  
  			// If a number was passed in, add the unit (except for certain CSS properties)
  			if ( type === "number" ) {
  				value += ret && ret[ 3 ] || ( jQuery.cssNumber[ origName ] ? "" : "px" );
  			}
  
  			// background-* props affect original clone's values
  			if ( !support.clearCloneStyle && value === "" && name.indexOf( "background" ) === 0 ) {
  				style[ name ] = "inherit";
  			}
  
  			// If a hook was provided, use that value, otherwise just set the specified value
  			if ( !hooks || !( "set" in hooks ) ||
  				( value = hooks.set( elem, value, extra ) ) !== undefined ) {
  
  				if ( isCustomProp ) {
  					style.setProperty( name, value );
  				} else {
  					style[ name ] = value;
  				}
  			}
  
  		} else {
  
  			// If a hook was provided get the non-computed value from there
  			if ( hooks && "get" in hooks &&
  				( ret = hooks.get( elem, false, extra ) ) !== undefined ) {
  
  				return ret;
  			}
  
  			// Otherwise just get the value from the style object
  			return style[ name ];
  		}
  	},
  
  	css: function( elem, name, extra, styles ) {
  		var val, num, hooks,
  			origName = camelCase( name ),
  			isCustomProp = rcustomProp.test( name );
  
  		// Make sure that we're working with the right name. We don't
  		// want to modify the value if it is a CSS custom property
  		// since they are user-defined.
  		if ( !isCustomProp ) {
  			name = finalPropName( origName );
  		}
  
  		// Try prefixed name followed by the unprefixed name
  		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
  
  		// If a hook was provided get the computed value from there
  		if ( hooks && "get" in hooks ) {
  			val = hooks.get( elem, true, extra );
  		}
  
  		// Otherwise, if a way to get the computed value exists, use that
  		if ( val === undefined ) {
  			val = curCSS( elem, name, styles );
  		}
  
  		// Convert "normal" to computed value
  		if ( val === "normal" && name in cssNormalTransform ) {
  			val = cssNormalTransform[ name ];
  		}
  
  		// Make numeric if forced or a qualifier was provided and val looks numeric
  		if ( extra === "" || extra ) {
  			num = parseFloat( val );
  			return extra === true || isFinite( num ) ? num || 0 : val;
  		}
  
  		return val;
  	}
  } );
  
  jQuery.each( [ "height", "width" ], function( i, dimension ) {
  	jQuery.cssHooks[ dimension ] = {
  		get: function( elem, computed, extra ) {
  			if ( computed ) {
  
  				// Certain elements can have dimension info if we invisibly show them
  				// but it must have a current display style that would benefit
  				return rdisplayswap.test( jQuery.css( elem, "display" ) ) &&
  
  					// Support: Safari 8+
  					// Table columns in Safari have non-zero offsetWidth & zero
  					// getBoundingClientRect().width unless display is changed.
  					// Support: IE <=11 only
  					// Running getBoundingClientRect on a disconnected node
  					// in IE throws an error.
  					( !elem.getClientRects().length || !elem.getBoundingClientRect().width ) ?
  						swap( elem, cssShow, function() {
  							return getWidthOrHeight( elem, dimension, extra );
  						} ) :
  						getWidthOrHeight( elem, dimension, extra );
  			}
  		},
  
  		set: function( elem, value, extra ) {
  			var matches,
  				styles = getStyles( elem ),
  				isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
  				subtract = extra && boxModelAdjustment(
  					elem,
  					dimension,
  					extra,
  					isBorderBox,
  					styles
  				);
  
  			// Account for unreliable border-box dimensions by comparing offset* to computed and
  			// faking a content-box to get border and padding (gh-3699)
  			if ( isBorderBox && support.scrollboxSize() === styles.position ) {
  				subtract -= Math.ceil(
  					elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -
  					parseFloat( styles[ dimension ] ) -
  					boxModelAdjustment( elem, dimension, "border", false, styles ) -
  					0.5
  				);
  			}
  
  			// Convert to pixels if value adjustment is needed
  			if ( subtract && ( matches = rcssNum.exec( value ) ) &&
  				( matches[ 3 ] || "px" ) !== "px" ) {
  
  				elem.style[ dimension ] = value;
  				value = jQuery.css( elem, dimension );
  			}
  
  			return setPositiveNumber( elem, value, subtract );
  		}
  	};
  } );
  
  jQuery.cssHooks.marginLeft = addGetHookIf( support.reliableMarginLeft,
  	function( elem, computed ) {
  		if ( computed ) {
  			return ( parseFloat( curCSS( elem, "marginLeft" ) ) ||
  				elem.getBoundingClientRect().left -
  					swap( elem, { marginLeft: 0 }, function() {
  						return elem.getBoundingClientRect().left;
  					} )
  				) + "px";
  		}
  	}
  );
  
  // These hooks are used by animate to expand properties
  jQuery.each( {
  	margin: "",
  	padding: "",
  	border: "Width"
  }, function( prefix, suffix ) {
  	jQuery.cssHooks[ prefix + suffix ] = {
  		expand: function( value ) {
  			var i = 0,
  				expanded = {},
  
  				// Assumes a single number if not a string
  				parts = typeof value === "string" ? value.split( " " ) : [ value ];
  
  			for ( ; i < 4; i++ ) {
  				expanded[ prefix + cssExpand[ i ] + suffix ] =
  					parts[ i ] || parts[ i - 2 ] || parts[ 0 ];
  			}
  
  			return expanded;
  		}
  	};
  
  	if ( prefix !== "margin" ) {
  		jQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;
  	}
  } );
  
  jQuery.fn.extend( {
  	css: function( name, value ) {
  		return access( this, function( elem, name, value ) {
  			var styles, len,
  				map = {},
  				i = 0;
  
  			if ( Array.isArray( name ) ) {
  				styles = getStyles( elem );
  				len = name.length;
  
  				for ( ; i < len; i++ ) {
  					map[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );
  				}
  
  				return map;
  			}
  
  			return value !== undefined ?
  				jQuery.style( elem, name, value ) :
  				jQuery.css( elem, name );
  		}, name, value, arguments.length > 1 );
  	}
  } );
  
  
  function Tween( elem, options, prop, end, easing ) {
  	return new Tween.prototype.init( elem, options, prop, end, easing );
  }
  jQuery.Tween = Tween;
  
  Tween.prototype = {
  	constructor: Tween,
  	init: function( elem, options, prop, end, easing, unit ) {
  		this.elem = elem;
  		this.prop = prop;
  		this.easing = easing || jQuery.easing._default;
  		this.options = options;
  		this.start = this.now = this.cur();
  		this.end = end;
  		this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
  	},
  	cur: function() {
  		var hooks = Tween.propHooks[ this.prop ];
  
  		return hooks && hooks.get ?
  			hooks.get( this ) :
  			Tween.propHooks._default.get( this );
  	},
  	run: function( percent ) {
  		var eased,
  			hooks = Tween.propHooks[ this.prop ];
  
  		if ( this.options.duration ) {
  			this.pos = eased = jQuery.easing[ this.easing ](
  				percent, this.options.duration * percent, 0, 1, this.options.duration
  			);
  		} else {
  			this.pos = eased = percent;
  		}
  		this.now = ( this.end - this.start ) * eased + this.start;
  
  		if ( this.options.step ) {
  			this.options.step.call( this.elem, this.now, this );
  		}
  
  		if ( hooks && hooks.set ) {
  			hooks.set( this );
  		} else {
  			Tween.propHooks._default.set( this );
  		}
  		return this;
  	}
  };
  
  Tween.prototype.init.prototype = Tween.prototype;
  
  Tween.propHooks = {
  	_default: {
  		get: function( tween ) {
  			var result;
  
  			// Use a property on the element directly when it is not a DOM element,
  			// or when there is no matching style property that exists.
  			if ( tween.elem.nodeType !== 1 ||
  				tween.elem[ tween.prop ] != null && tween.elem.style[ tween.prop ] == null ) {
  				return tween.elem[ tween.prop ];
  			}
  
  			// Passing an empty string as a 3rd parameter to .css will automatically
  			// attempt a parseFloat and fallback to a string if the parse fails.
  			// Simple values such as "10px" are parsed to Float;
  			// complex values such as "rotate(1rad)" are returned as-is.
  			result = jQuery.css( tween.elem, tween.prop, "" );
  
  			// Empty strings, null, undefined and "auto" are converted to 0.
  			return !result || result === "auto" ? 0 : result;
  		},
  		set: function( tween ) {
  
  			// Use step hook for back compat.
  			// Use cssHook if its there.
  			// Use .style if available and use plain properties where available.
  			if ( jQuery.fx.step[ tween.prop ] ) {
  				jQuery.fx.step[ tween.prop ]( tween );
  			} else if ( tween.elem.nodeType === 1 &&
  				( tween.elem.style[ jQuery.cssProps[ tween.prop ] ] != null ||
  					jQuery.cssHooks[ tween.prop ] ) ) {
  				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
  			} else {
  				tween.elem[ tween.prop ] = tween.now;
  			}
  		}
  	}
  };
  
  // Support: IE <=9 only
  // Panic based approach to setting things on disconnected nodes
  Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
  	set: function( tween ) {
  		if ( tween.elem.nodeType && tween.elem.parentNode ) {
  			tween.elem[ tween.prop ] = tween.now;
  		}
  	}
  };
  
  jQuery.easing = {
  	linear: function( p ) {
  		return p;
  	},
  	swing: function( p ) {
  		return 0.5 - Math.cos( p * Math.PI ) / 2;
  	},
  	_default: "swing"
  };
  
  jQuery.fx = Tween.prototype.init;
  
  // Back compat <1.8 extension point
  jQuery.fx.step = {};
  
  
  
  
  var
  	fxNow, inProgress,
  	rfxtypes = /^(?:toggle|show|hide)$/,
  	rrun = /queueHooks$/;
  
  function schedule() {
  	if ( inProgress ) {
  		if ( document.hidden === false && window.requestAnimationFrame ) {
  			window.requestAnimationFrame( schedule );
  		} else {
  			window.setTimeout( schedule, jQuery.fx.interval );
  		}
  
  		jQuery.fx.tick();
  	}
  }
  
  // Animations created synchronously will run synchronously
  function createFxNow() {
  	window.setTimeout( function() {
  		fxNow = undefined;
  	} );
  	return ( fxNow = Date.now() );
  }
  
  // Generate parameters to create a standard animation
  function genFx( type, includeWidth ) {
  	var which,
  		i = 0,
  		attrs = { height: type };
  
  	// If we include width, step value is 1 to do all cssExpand values,
  	// otherwise step value is 2 to skip over Left and Right
  	includeWidth = includeWidth ? 1 : 0;
  	for ( ; i < 4; i += 2 - includeWidth ) {
  		which = cssExpand[ i ];
  		attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;
  	}
  
  	if ( includeWidth ) {
  		attrs.opacity = attrs.width = type;
  	}
  
  	return attrs;
  }
  
  function createTween( value, prop, animation ) {
  	var tween,
  		collection = ( Animation.tweeners[ prop ] || [] ).concat( Animation.tweeners[ "*" ] ),
  		index = 0,
  		length = collection.length;
  	for ( ; index < length; index++ ) {
  		if ( ( tween = collection[ index ].call( animation, prop, value ) ) ) {
  
  			// We're done with this property
  			return tween;
  		}
  	}
  }
  
  function defaultPrefilter( elem, props, opts ) {
  	var prop, value, toggle, hooks, oldfire, propTween, restoreDisplay, display,
  		isBox = "width" in props || "height" in props,
  		anim = this,
  		orig = {},
  		style = elem.style,
  		hidden = elem.nodeType && isHiddenWithinTree( elem ),
  		dataShow = dataPriv.get( elem, "fxshow" );
  
  	// Queue-skipping animations hijack the fx hooks
  	if ( !opts.queue ) {
  		hooks = jQuery._queueHooks( elem, "fx" );
  		if ( hooks.unqueued == null ) {
  			hooks.unqueued = 0;
  			oldfire = hooks.empty.fire;
  			hooks.empty.fire = function() {
  				if ( !hooks.unqueued ) {
  					oldfire();
  				}
  			};
  		}
  		hooks.unqueued++;
  
  		anim.always( function() {
  
  			// Ensure the complete handler is called before this completes
  			anim.always( function() {
  				hooks.unqueued--;
  				if ( !jQuery.queue( elem, "fx" ).length ) {
  					hooks.empty.fire();
  				}
  			} );
  		} );
  	}
  
  	// Detect show/hide animations
  	for ( prop in props ) {
  		value = props[ prop ];
  		if ( rfxtypes.test( value ) ) {
  			delete props[ prop ];
  			toggle = toggle || value === "toggle";
  			if ( value === ( hidden ? "hide" : "show" ) ) {
  
  				// Pretend to be hidden if this is a "show" and
  				// there is still data from a stopped show/hide
  				if ( value === "show" && dataShow && dataShow[ prop ] !== undefined ) {
  					hidden = true;
  
  				// Ignore all other no-op show/hide data
  				} else {
  					continue;
  				}
  			}
  			orig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );
  		}
  	}
  
  	// Bail out if this is a no-op like .hide().hide()
  	propTween = !jQuery.isEmptyObject( props );
  	if ( !propTween && jQuery.isEmptyObject( orig ) ) {
  		return;
  	}
  
  	// Restrict "overflow" and "display" styles during box animations
  	if ( isBox && elem.nodeType === 1 ) {
  
  		// Support: IE <=9 - 11, Edge 12 - 15
  		// Record all 3 overflow attributes because IE does not infer the shorthand
  		// from identically-valued overflowX and overflowY and Edge just mirrors
  		// the overflowX value there.
  		opts.overflow = [ style.overflow, style.overflowX, style.overflowY ];
  
  		// Identify a display type, preferring old show/hide data over the CSS cascade
  		restoreDisplay = dataShow && dataShow.display;
  		if ( restoreDisplay == null ) {
  			restoreDisplay = dataPriv.get( elem, "display" );
  		}
  		display = jQuery.css( elem, "display" );
  		if ( display === "none" ) {
  			if ( restoreDisplay ) {
  				display = restoreDisplay;
  			} else {
  
  				// Get nonempty value(s) by temporarily forcing visibility
  				showHide( [ elem ], true );
  				restoreDisplay = elem.style.display || restoreDisplay;
  				display = jQuery.css( elem, "display" );
  				showHide( [ elem ] );
  			}
  		}
  
  		// Animate inline elements as inline-block
  		if ( display === "inline" || display === "inline-block" && restoreDisplay != null ) {
  			if ( jQuery.css( elem, "float" ) === "none" ) {
  
  				// Restore the original display value at the end of pure show/hide animations
  				if ( !propTween ) {
  					anim.done( function() {
  						style.display = restoreDisplay;
  					} );
  					if ( restoreDisplay == null ) {
  						display = style.display;
  						restoreDisplay = display === "none" ? "" : display;
  					}
  				}
  				style.display = "inline-block";
  			}
  		}
  	}
  
  	if ( opts.overflow ) {
  		style.overflow = "hidden";
  		anim.always( function() {
  			style.overflow = opts.overflow[ 0 ];
  			style.overflowX = opts.overflow[ 1 ];
  			style.overflowY = opts.overflow[ 2 ];
  		} );
  	}
  
  	// Implement show/hide animations
  	propTween = false;
  	for ( prop in orig ) {
  
  		// General show/hide setup for this element animation
  		if ( !propTween ) {
  			if ( dataShow ) {
  				if ( "hidden" in dataShow ) {
  					hidden = dataShow.hidden;
  				}
  			} else {
  				dataShow = dataPriv.access( elem, "fxshow", { display: restoreDisplay } );
  			}
  
  			// Store hidden/visible for toggle so `.stop().toggle()` "reverses"
  			if ( toggle ) {
  				dataShow.hidden = !hidden;
  			}
  
  			// Show elements before animating them
  			if ( hidden ) {
  				showHide( [ elem ], true );
  			}
  
  			/* eslint-disable no-loop-func */
  
  			anim.done( function() {
  
  			/* eslint-enable no-loop-func */
  
  				// The final step of a "hide" animation is actually hiding the element
  				if ( !hidden ) {
  					showHide( [ elem ] );
  				}
  				dataPriv.remove( elem, "fxshow" );
  				for ( prop in orig ) {
  					jQuery.style( elem, prop, orig[ prop ] );
  				}
  			} );
  		}
  
  		// Per-property setup
  		propTween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );
  		if ( !( prop in dataShow ) ) {
  			dataShow[ prop ] = propTween.start;
  			if ( hidden ) {
  				propTween.end = propTween.start;
  				propTween.start = 0;
  			}
  		}
  	}
  }
  
  function propFilter( props, specialEasing ) {
  	var index, name, easing, value, hooks;
  
  	// camelCase, specialEasing and expand cssHook pass
  	for ( index in props ) {
  		name = camelCase( index );
  		easing = specialEasing[ name ];
  		value = props[ index ];
  		if ( Array.isArray( value ) ) {
  			easing = value[ 1 ];
  			value = props[ index ] = value[ 0 ];
  		}
  
  		if ( index !== name ) {
  			props[ name ] = value;
  			delete props[ index ];
  		}
  
  		hooks = jQuery.cssHooks[ name ];
  		if ( hooks && "expand" in hooks ) {
  			value = hooks.expand( value );
  			delete props[ name ];
  
  			// Not quite $.extend, this won't overwrite existing keys.
  			// Reusing 'index' because we have the correct "name"
  			for ( index in value ) {
  				if ( !( index in props ) ) {
  					props[ index ] = value[ index ];
  					specialEasing[ index ] = easing;
  				}
  			}
  		} else {
  			specialEasing[ name ] = easing;
  		}
  	}
  }
  
  function Animation( elem, properties, options ) {
  	var result,
  		stopped,
  		index = 0,
  		length = Animation.prefilters.length,
  		deferred = jQuery.Deferred().always( function() {
  
  			// Don't match elem in the :animated selector
  			delete tick.elem;
  		} ),
  		tick = function() {
  			if ( stopped ) {
  				return false;
  			}
  			var currentTime = fxNow || createFxNow(),
  				remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
  
  				// Support: Android 2.3 only
  				// Archaic crash bug won't allow us to use `1 - ( 0.5 || 0 )` (#12497)
  				temp = remaining / animation.duration || 0,
  				percent = 1 - temp,
  				index = 0,
  				length = animation.tweens.length;
  
  			for ( ; index < length; index++ ) {
  				animation.tweens[ index ].run( percent );
  			}
  
  			deferred.notifyWith( elem, [ animation, percent, remaining ] );
  
  			// If there's more to do, yield
  			if ( percent < 1 && length ) {
  				return remaining;
  			}
  
  			// If this was an empty animation, synthesize a final progress notification
  			if ( !length ) {
  				deferred.notifyWith( elem, [ animation, 1, 0 ] );
  			}
  
  			// Resolve the animation and report its conclusion
  			deferred.resolveWith( elem, [ animation ] );
  			return false;
  		},
  		animation = deferred.promise( {
  			elem: elem,
  			props: jQuery.extend( {}, properties ),
  			opts: jQuery.extend( true, {
  				specialEasing: {},
  				easing: jQuery.easing._default
  			}, options ),
  			originalProperties: properties,
  			originalOptions: options,
  			startTime: fxNow || createFxNow(),
  			duration: options.duration,
  			tweens: [],
  			createTween: function( prop, end ) {
  				var tween = jQuery.Tween( elem, animation.opts, prop, end,
  						animation.opts.specialEasing[ prop ] || animation.opts.easing );
  				animation.tweens.push( tween );
  				return tween;
  			},
  			stop: function( gotoEnd ) {
  				var index = 0,
  
  					// If we are going to the end, we want to run all the tweens
  					// otherwise we skip this part
  					length = gotoEnd ? animation.tweens.length : 0;
  				if ( stopped ) {
  					return this;
  				}
  				stopped = true;
  				for ( ; index < length; index++ ) {
  					animation.tweens[ index ].run( 1 );
  				}
  
  				// Resolve when we played the last frame; otherwise, reject
  				if ( gotoEnd ) {
  					deferred.notifyWith( elem, [ animation, 1, 0 ] );
  					deferred.resolveWith( elem, [ animation, gotoEnd ] );
  				} else {
  					deferred.rejectWith( elem, [ animation, gotoEnd ] );
  				}
  				return this;
  			}
  		} ),
  		props = animation.props;
  
  	propFilter( props, animation.opts.specialEasing );
  
  	for ( ; index < length; index++ ) {
  		result = Animation.prefilters[ index ].call( animation, elem, props, animation.opts );
  		if ( result ) {
  			if ( isFunction( result.stop ) ) {
  				jQuery._queueHooks( animation.elem, animation.opts.queue ).stop =
  					result.stop.bind( result );
  			}
  			return result;
  		}
  	}
  
  	jQuery.map( props, createTween, animation );
  
  	if ( isFunction( animation.opts.start ) ) {
  		animation.opts.start.call( elem, animation );
  	}
  
  	// Attach callbacks from options
  	animation
  		.progress( animation.opts.progress )
  		.done( animation.opts.done, animation.opts.complete )
  		.fail( animation.opts.fail )
  		.always( animation.opts.always );
  
  	jQuery.fx.timer(
  		jQuery.extend( tick, {
  			elem: elem,
  			anim: animation,
  			queue: animation.opts.queue
  		} )
  	);
  
  	return animation;
  }
  
  jQuery.Animation = jQuery.extend( Animation, {
  
  	tweeners: {
  		"*": [ function( prop, value ) {
  			var tween = this.createTween( prop, value );
  			adjustCSS( tween.elem, prop, rcssNum.exec( value ), tween );
  			return tween;
  		} ]
  	},
  
  	tweener: function( props, callback ) {
  		if ( isFunction( props ) ) {
  			callback = props;
  			props = [ "*" ];
  		} else {
  			props = props.match( rnothtmlwhite );
  		}
  
  		var prop,
  			index = 0,
  			length = props.length;
  
  		for ( ; index < length; index++ ) {
  			prop = props[ index ];
  			Animation.tweeners[ prop ] = Animation.tweeners[ prop ] || [];
  			Animation.tweeners[ prop ].unshift( callback );
  		}
  	},
  
  	prefilters: [ defaultPrefilter ],
  
  	prefilter: function( callback, prepend ) {
  		if ( prepend ) {
  			Animation.prefilters.unshift( callback );
  		} else {
  			Animation.prefilters.push( callback );
  		}
  	}
  } );
  
  jQuery.speed = function( speed, easing, fn ) {
  	var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
  		complete: fn || !fn && easing ||
  			isFunction( speed ) && speed,
  		duration: speed,
  		easing: fn && easing || easing && !isFunction( easing ) && easing
  	};
  
  	// Go to the end state if fx are off
  	if ( jQuery.fx.off ) {
  		opt.duration = 0;
  
  	} else {
  		if ( typeof opt.duration !== "number" ) {
  			if ( opt.duration in jQuery.fx.speeds ) {
  				opt.duration = jQuery.fx.speeds[ opt.duration ];
  
  			} else {
  				opt.duration = jQuery.fx.speeds._default;
  			}
  		}
  	}
  
  	// Normalize opt.queue - true/undefined/null -> "fx"
  	if ( opt.queue == null || opt.queue === true ) {
  		opt.queue = "fx";
  	}
  
  	// Queueing
  	opt.old = opt.complete;
  
  	opt.complete = function() {
  		if ( isFunction( opt.old ) ) {
  			opt.old.call( this );
  		}
  
  		if ( opt.queue ) {
  			jQuery.dequeue( this, opt.queue );
  		}
  	};
  
  	return opt;
  };
  
  jQuery.fn.extend( {
  	fadeTo: function( speed, to, easing, callback ) {
  
  		// Show any hidden elements after setting opacity to 0
  		return this.filter( isHiddenWithinTree ).css( "opacity", 0 ).show()
  
  			// Animate to the value specified
  			.end().animate( { opacity: to }, speed, easing, callback );
  	},
  	animate: function( prop, speed, easing, callback ) {
  		var empty = jQuery.isEmptyObject( prop ),
  			optall = jQuery.speed( speed, easing, callback ),
  			doAnimation = function() {
  
  				// Operate on a copy of prop so per-property easing won't be lost
  				var anim = Animation( this, jQuery.extend( {}, prop ), optall );
  
  				// Empty animations, or finishing resolves immediately
  				if ( empty || dataPriv.get( this, "finish" ) ) {
  					anim.stop( true );
  				}
  			};
  			doAnimation.finish = doAnimation;
  
  		return empty || optall.queue === false ?
  			this.each( doAnimation ) :
  			this.queue( optall.queue, doAnimation );
  	},
  	stop: function( type, clearQueue, gotoEnd ) {
  		var stopQueue = function( hooks ) {
  			var stop = hooks.stop;
  			delete hooks.stop;
  			stop( gotoEnd );
  		};
  
  		if ( typeof type !== "string" ) {
  			gotoEnd = clearQueue;
  			clearQueue = type;
  			type = undefined;
  		}
  		if ( clearQueue && type !== false ) {
  			this.queue( type || "fx", [] );
  		}
  
  		return this.each( function() {
  			var dequeue = true,
  				index = type != null && type + "queueHooks",
  				timers = jQuery.timers,
  				data = dataPriv.get( this );
  
  			if ( index ) {
  				if ( data[ index ] && data[ index ].stop ) {
  					stopQueue( data[ index ] );
  				}
  			} else {
  				for ( index in data ) {
  					if ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {
  						stopQueue( data[ index ] );
  					}
  				}
  			}
  
  			for ( index = timers.length; index--; ) {
  				if ( timers[ index ].elem === this &&
  					( type == null || timers[ index ].queue === type ) ) {
  
  					timers[ index ].anim.stop( gotoEnd );
  					dequeue = false;
  					timers.splice( index, 1 );
  				}
  			}
  
  			// Start the next in the queue if the last step wasn't forced.
  			// Timers currently will call their complete callbacks, which
  			// will dequeue but only if they were gotoEnd.
  			if ( dequeue || !gotoEnd ) {
  				jQuery.dequeue( this, type );
  			}
  		} );
  	},
  	finish: function( type ) {
  		if ( type !== false ) {
  			type = type || "fx";
  		}
  		return this.each( function() {
  			var index,
  				data = dataPriv.get( this ),
  				queue = data[ type + "queue" ],
  				hooks = data[ type + "queueHooks" ],
  				timers = jQuery.timers,
  				length = queue ? queue.length : 0;
  
  			// Enable finishing flag on private data
  			data.finish = true;
  
  			// Empty the queue first
  			jQuery.queue( this, type, [] );
  
  			if ( hooks && hooks.stop ) {
  				hooks.stop.call( this, true );
  			}
  
  			// Look for any active animations, and finish them
  			for ( index = timers.length; index--; ) {
  				if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
  					timers[ index ].anim.stop( true );
  					timers.splice( index, 1 );
  				}
  			}
  
  			// Look for any animations in the old queue and finish them
  			for ( index = 0; index < length; index++ ) {
  				if ( queue[ index ] && queue[ index ].finish ) {
  					queue[ index ].finish.call( this );
  				}
  			}
  
  			// Turn off finishing flag
  			delete data.finish;
  		} );
  	}
  } );
  
  jQuery.each( [ "toggle", "show", "hide" ], function( i, name ) {
  	var cssFn = jQuery.fn[ name ];
  	jQuery.fn[ name ] = function( speed, easing, callback ) {
  		return speed == null || typeof speed === "boolean" ?
  			cssFn.apply( this, arguments ) :
  			this.animate( genFx( name, true ), speed, easing, callback );
  	};
  } );
  
  // Generate shortcuts for custom animations
  jQuery.each( {
  	slideDown: genFx( "show" ),
  	slideUp: genFx( "hide" ),
  	slideToggle: genFx( "toggle" ),
  	fadeIn: { opacity: "show" },
  	fadeOut: { opacity: "hide" },
  	fadeToggle: { opacity: "toggle" }
  }, function( name, props ) {
  	jQuery.fn[ name ] = function( speed, easing, callback ) {
  		return this.animate( props, speed, easing, callback );
  	};
  } );
  
  jQuery.timers = [];
  jQuery.fx.tick = function() {
  	var timer,
  		i = 0,
  		timers = jQuery.timers;
  
  	fxNow = Date.now();
  
  	for ( ; i < timers.length; i++ ) {
  		timer = timers[ i ];
  
  		// Run the timer and safely remove it when done (allowing for external removal)
  		if ( !timer() && timers[ i ] === timer ) {
  			timers.splice( i--, 1 );
  		}
  	}
  
  	if ( !timers.length ) {
  		jQuery.fx.stop();
  	}
  	fxNow = undefined;
  };
  
  jQuery.fx.timer = function( timer ) {
  	jQuery.timers.push( timer );
  	jQuery.fx.start();
  };
  
  jQuery.fx.interval = 13;
  jQuery.fx.start = function() {
  	if ( inProgress ) {
  		return;
  	}
  
  	inProgress = true;
  	schedule();
  };
  
  jQuery.fx.stop = function() {
  	inProgress = null;
  };
  
  jQuery.fx.speeds = {
  	slow: 600,
  	fast: 200,
  
  	// Default speed
  	_default: 400
  };
  
  
  // Based off of the plugin by Clint Helfers, with permission.
  // https://web.archive.org/web/20100324014747/http://blindsignals.com/index.php/2009/07/jquery-delay/
  jQuery.fn.delay = function( time, type ) {
  	time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
  	type = type || "fx";
  
  	return this.queue( type, function( next, hooks ) {
  		var timeout = window.setTimeout( next, time );
  		hooks.stop = function() {
  			window.clearTimeout( timeout );
  		};
  	} );
  };
  
  
  ( function() {
  	var input = document.createElement( "input" ),
  		select = document.createElement( "select" ),
  		opt = select.appendChild( document.createElement( "option" ) );
  
  	input.type = "checkbox";
  
  	// Support: Android <=4.3 only
  	// Default value for a checkbox should be "on"
  	support.checkOn = input.value !== "";
  
  	// Support: IE <=11 only
  	// Must access selectedIndex to make default options select
  	support.optSelected = opt.selected;
  
  	// Support: IE <=11 only
  	// An input loses its value after becoming a radio
  	input = document.createElement( "input" );
  	input.value = "t";
  	input.type = "radio";
  	support.radioValue = input.value === "t";
  } )();
  
  
  var boolHook,
  	attrHandle = jQuery.expr.attrHandle;
  
  jQuery.fn.extend( {
  	attr: function( name, value ) {
  		return access( this, jQuery.attr, name, value, arguments.length > 1 );
  	},
  
  	removeAttr: function( name ) {
  		return this.each( function() {
  			jQuery.removeAttr( this, name );
  		} );
  	}
  } );
  
  jQuery.extend( {
  	attr: function( elem, name, value ) {
  		var ret, hooks,
  			nType = elem.nodeType;
  
  		// Don't get/set attributes on text, comment and attribute nodes
  		if ( nType === 3 || nType === 8 || nType === 2 ) {
  			return;
  		}
  
  		// Fallback to prop when attributes are not supported
  		if ( typeof elem.getAttribute === "undefined" ) {
  			return jQuery.prop( elem, name, value );
  		}
  
  		// Attribute hooks are determined by the lowercase version
  		// Grab necessary hook if one is defined
  		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
  			hooks = jQuery.attrHooks[ name.toLowerCase() ] ||
  				( jQuery.expr.match.bool.test( name ) ? boolHook : undefined );
  		}
  
  		if ( value !== undefined ) {
  			if ( value === null ) {
  				jQuery.removeAttr( elem, name );
  				return;
  			}
  
  			if ( hooks && "set" in hooks &&
  				( ret = hooks.set( elem, value, name ) ) !== undefined ) {
  				return ret;
  			}
  
  			elem.setAttribute( name, value + "" );
  			return value;
  		}
  
  		if ( hooks && "get" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {
  			return ret;
  		}
  
  		ret = jQuery.find.attr( elem, name );
  
  		// Non-existent attributes return null, we normalize to undefined
  		return ret == null ? undefined : ret;
  	},
  
  	attrHooks: {
  		type: {
  			set: function( elem, value ) {
  				if ( !support.radioValue && value === "radio" &&
  					nodeName( elem, "input" ) ) {
  					var val = elem.value;
  					elem.setAttribute( "type", value );
  					if ( val ) {
  						elem.value = val;
  					}
  					return value;
  				}
  			}
  		}
  	},
  
  	removeAttr: function( elem, value ) {
  		var name,
  			i = 0,
  
  			// Attribute names can contain non-HTML whitespace characters
  			// https://html.spec.whatwg.org/multipage/syntax.html#attributes-2
  			attrNames = value && value.match( rnothtmlwhite );
  
  		if ( attrNames && elem.nodeType === 1 ) {
  			while ( ( name = attrNames[ i++ ] ) ) {
  				elem.removeAttribute( name );
  			}
  		}
  	}
  } );
  
  // Hooks for boolean attributes
  boolHook = {
  	set: function( elem, value, name ) {
  		if ( value === false ) {
  
  			// Remove boolean attributes when set to false
  			jQuery.removeAttr( elem, name );
  		} else {
  			elem.setAttribute( name, name );
  		}
  		return name;
  	}
  };
  
  jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
  	var getter = attrHandle[ name ] || jQuery.find.attr;
  
  	attrHandle[ name ] = function( elem, name, isXML ) {
  		var ret, handle,
  			lowercaseName = name.toLowerCase();
  
  		if ( !isXML ) {
  
  			// Avoid an infinite loop by temporarily removing this function from the getter
  			handle = attrHandle[ lowercaseName ];
  			attrHandle[ lowercaseName ] = ret;
  			ret = getter( elem, name, isXML ) != null ?
  				lowercaseName :
  				null;
  			attrHandle[ lowercaseName ] = handle;
  		}
  		return ret;
  	};
  } );
  
  
  
  
  var rfocusable = /^(?:input|select|textarea|button)$/i,
  	rclickable = /^(?:a|area)$/i;
  
  jQuery.fn.extend( {
  	prop: function( name, value ) {
  		return access( this, jQuery.prop, name, value, arguments.length > 1 );
  	},
  
  	removeProp: function( name ) {
  		return this.each( function() {
  			delete this[ jQuery.propFix[ name ] || name ];
  		} );
  	}
  } );
  
  jQuery.extend( {
  	prop: function( elem, name, value ) {
  		var ret, hooks,
  			nType = elem.nodeType;
  
  		// Don't get/set properties on text, comment and attribute nodes
  		if ( nType === 3 || nType === 8 || nType === 2 ) {
  			return;
  		}
  
  		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
  
  			// Fix name and attach hooks
  			name = jQuery.propFix[ name ] || name;
  			hooks = jQuery.propHooks[ name ];
  		}
  
  		if ( value !== undefined ) {
  			if ( hooks && "set" in hooks &&
  				( ret = hooks.set( elem, value, name ) ) !== undefined ) {
  				return ret;
  			}
  
  			return ( elem[ name ] = value );
  		}
  
  		if ( hooks && "get" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {
  			return ret;
  		}
  
  		return elem[ name ];
  	},
  
  	propHooks: {
  		tabIndex: {
  			get: function( elem ) {
  
  				// Support: IE <=9 - 11 only
  				// elem.tabIndex doesn't always return the
  				// correct value when it hasn't been explicitly set
  				// https://web.archive.org/web/20141116233347/http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
  				// Use proper attribute retrieval(#12072)
  				var tabindex = jQuery.find.attr( elem, "tabindex" );
  
  				if ( tabindex ) {
  					return parseInt( tabindex, 10 );
  				}
  
  				if (
  					rfocusable.test( elem.nodeName ) ||
  					rclickable.test( elem.nodeName ) &&
  					elem.href
  				) {
  					return 0;
  				}
  
  				return -1;
  			}
  		}
  	},
  
  	propFix: {
  		"for": "htmlFor",
  		"class": "className"
  	}
  } );
  
  // Support: IE <=11 only
  // Accessing the selectedIndex property
  // forces the browser to respect setting selected
  // on the option
  // The getter ensures a default option is selected
  // when in an optgroup
  // eslint rule "no-unused-expressions" is disabled for this code
  // since it considers such accessions noop
  if ( !support.optSelected ) {
  	jQuery.propHooks.selected = {
  		get: function( elem ) {
  
  			/* eslint no-unused-expressions: "off" */
  
  			var parent = elem.parentNode;
  			if ( parent && parent.parentNode ) {
  				parent.parentNode.selectedIndex;
  			}
  			return null;
  		},
  		set: function( elem ) {
  
  			/* eslint no-unused-expressions: "off" */
  
  			var parent = elem.parentNode;
  			if ( parent ) {
  				parent.selectedIndex;
  
  				if ( parent.parentNode ) {
  					parent.parentNode.selectedIndex;
  				}
  			}
  		}
  	};
  }
  
  jQuery.each( [
  	"tabIndex",
  	"readOnly",
  	"maxLength",
  	"cellSpacing",
  	"cellPadding",
  	"rowSpan",
  	"colSpan",
  	"useMap",
  	"frameBorder",
  	"contentEditable"
  ], function() {
  	jQuery.propFix[ this.toLowerCase() ] = this;
  } );
  
  
  
  
  	// Strip and collapse whitespace according to HTML spec
  	// https://infra.spec.whatwg.org/#strip-and-collapse-ascii-whitespace
  	function stripAndCollapse( value ) {
  		var tokens = value.match( rnothtmlwhite ) || [];
  		return tokens.join( " " );
  	}
  
  
  function getClass( elem ) {
  	return elem.getAttribute && elem.getAttribute( "class" ) || "";
  }
  
  function classesToArray( value ) {
  	if ( Array.isArray( value ) ) {
  		return value;
  	}
  	if ( typeof value === "string" ) {
  		return value.match( rnothtmlwhite ) || [];
  	}
  	return [];
  }
  
  jQuery.fn.extend( {
  	addClass: function( value ) {
  		var classes, elem, cur, curValue, clazz, j, finalValue,
  			i = 0;
  
  		if ( isFunction( value ) ) {
  			return this.each( function( j ) {
  				jQuery( this ).addClass( value.call( this, j, getClass( this ) ) );
  			} );
  		}
  
  		classes = classesToArray( value );
  
  		if ( classes.length ) {
  			while ( ( elem = this[ i++ ] ) ) {
  				curValue = getClass( elem );
  				cur = elem.nodeType === 1 && ( " " + stripAndCollapse( curValue ) + " " );
  
  				if ( cur ) {
  					j = 0;
  					while ( ( clazz = classes[ j++ ] ) ) {
  						if ( cur.indexOf( " " + clazz + " " ) < 0 ) {
  							cur += clazz + " ";
  						}
  					}
  
  					// Only assign if different to avoid unneeded rendering.
  					finalValue = stripAndCollapse( cur );
  					if ( curValue !== finalValue ) {
  						elem.setAttribute( "class", finalValue );
  					}
  				}
  			}
  		}
  
  		return this;
  	},
  
  	removeClass: function( value ) {
  		var classes, elem, cur, curValue, clazz, j, finalValue,
  			i = 0;
  
  		if ( isFunction( value ) ) {
  			return this.each( function( j ) {
  				jQuery( this ).removeClass( value.call( this, j, getClass( this ) ) );
  			} );
  		}
  
  		if ( !arguments.length ) {
  			return this.attr( "class", "" );
  		}
  
  		classes = classesToArray( value );
  
  		if ( classes.length ) {
  			while ( ( elem = this[ i++ ] ) ) {
  				curValue = getClass( elem );
  
  				// This expression is here for better compressibility (see addClass)
  				cur = elem.nodeType === 1 && ( " " + stripAndCollapse( curValue ) + " " );
  
  				if ( cur ) {
  					j = 0;
  					while ( ( clazz = classes[ j++ ] ) ) {
  
  						// Remove *all* instances
  						while ( cur.indexOf( " " + clazz + " " ) > -1 ) {
  							cur = cur.replace( " " + clazz + " ", " " );
  						}
  					}
  
  					// Only assign if different to avoid unneeded rendering.
  					finalValue = stripAndCollapse( cur );
  					if ( curValue !== finalValue ) {
  						elem.setAttribute( "class", finalValue );
  					}
  				}
  			}
  		}
  
  		return this;
  	},
  
  	toggleClass: function( value, stateVal ) {
  		var type = typeof value,
  			isValidValue = type === "string" || Array.isArray( value );
  
  		if ( typeof stateVal === "boolean" && isValidValue ) {
  			return stateVal ? this.addClass( value ) : this.removeClass( value );
  		}
  
  		if ( isFunction( value ) ) {
  			return this.each( function( i ) {
  				jQuery( this ).toggleClass(
  					value.call( this, i, getClass( this ), stateVal ),
  					stateVal
  				);
  			} );
  		}
  
  		return this.each( function() {
  			var className, i, self, classNames;
  
  			if ( isValidValue ) {
  
  				// Toggle individual class names
  				i = 0;
  				self = jQuery( this );
  				classNames = classesToArray( value );
  
  				while ( ( className = classNames[ i++ ] ) ) {
  
  					// Check each className given, space separated list
  					if ( self.hasClass( className ) ) {
  						self.removeClass( className );
  					} else {
  						self.addClass( className );
  					}
  				}
  
  			// Toggle whole class name
  			} else if ( value === undefined || type === "boolean" ) {
  				className = getClass( this );
  				if ( className ) {
  
  					// Store className if set
  					dataPriv.set( this, "__className__", className );
  				}
  
  				// If the element has a class name or if we're passed `false`,
  				// then remove the whole classname (if there was one, the above saved it).
  				// Otherwise bring back whatever was previously saved (if anything),
  				// falling back to the empty string if nothing was stored.
  				if ( this.setAttribute ) {
  					this.setAttribute( "class",
  						className || value === false ?
  						"" :
  						dataPriv.get( this, "__className__" ) || ""
  					);
  				}
  			}
  		} );
  	},
  
  	hasClass: function( selector ) {
  		var className, elem,
  			i = 0;
  
  		className = " " + selector + " ";
  		while ( ( elem = this[ i++ ] ) ) {
  			if ( elem.nodeType === 1 &&
  				( " " + stripAndCollapse( getClass( elem ) ) + " " ).indexOf( className ) > -1 ) {
  					return true;
  			}
  		}
  
  		return false;
  	}
  } );
  
  
  
  
  var rreturn = /\r/g;
  
  jQuery.fn.extend( {
  	val: function( value ) {
  		var hooks, ret, valueIsFunction,
  			elem = this[ 0 ];
  
  		if ( !arguments.length ) {
  			if ( elem ) {
  				hooks = jQuery.valHooks[ elem.type ] ||
  					jQuery.valHooks[ elem.nodeName.toLowerCase() ];
  
  				if ( hooks &&
  					"get" in hooks &&
  					( ret = hooks.get( elem, "value" ) ) !== undefined
  				) {
  					return ret;
  				}
  
  				ret = elem.value;
  
  				// Handle most common string cases
  				if ( typeof ret === "string" ) {
  					return ret.replace( rreturn, "" );
  				}
  
  				// Handle cases where value is null/undef or number
  				return ret == null ? "" : ret;
  			}
  
  			return;
  		}
  
  		valueIsFunction = isFunction( value );
  
  		return this.each( function( i ) {
  			var val;
  
  			if ( this.nodeType !== 1 ) {
  				return;
  			}
  
  			if ( valueIsFunction ) {
  				val = value.call( this, i, jQuery( this ).val() );
  			} else {
  				val = value;
  			}
  
  			// Treat null/undefined as ""; convert numbers to string
  			if ( val == null ) {
  				val = "";
  
  			} else if ( typeof val === "number" ) {
  				val += "";
  
  			} else if ( Array.isArray( val ) ) {
  				val = jQuery.map( val, function( value ) {
  					return value == null ? "" : value + "";
  				} );
  			}
  
  			hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];
  
  			// If set returns undefined, fall back to normal setting
  			if ( !hooks || !( "set" in hooks ) || hooks.set( this, val, "value" ) === undefined ) {
  				this.value = val;
  			}
  		} );
  	}
  } );
  
  jQuery.extend( {
  	valHooks: {
  		option: {
  			get: function( elem ) {
  
  				var val = jQuery.find.attr( elem, "value" );
  				return val != null ?
  					val :
  
  					// Support: IE <=10 - 11 only
  					// option.text throws exceptions (#14686, #14858)
  					// Strip and collapse whitespace
  					// https://html.spec.whatwg.org/#strip-and-collapse-whitespace
  					stripAndCollapse( jQuery.text( elem ) );
  			}
  		},
  		select: {
  			get: function( elem ) {
  				var value, option, i,
  					options = elem.options,
  					index = elem.selectedIndex,
  					one = elem.type === "select-one",
  					values = one ? null : [],
  					max = one ? index + 1 : options.length;
  
  				if ( index < 0 ) {
  					i = max;
  
  				} else {
  					i = one ? index : 0;
  				}
  
  				// Loop through all the selected options
  				for ( ; i < max; i++ ) {
  					option = options[ i ];
  
  					// Support: IE <=9 only
  					// IE8-9 doesn't update selected after form reset (#2551)
  					if ( ( option.selected || i === index ) &&
  
  							// Don't return options that are disabled or in a disabled optgroup
  							!option.disabled &&
  							( !option.parentNode.disabled ||
  								!nodeName( option.parentNode, "optgroup" ) ) ) {
  
  						// Get the specific value for the option
  						value = jQuery( option ).val();
  
  						// We don't need an array for one selects
  						if ( one ) {
  							return value;
  						}
  
  						// Multi-Selects return an array
  						values.push( value );
  					}
  				}
  
  				return values;
  			},
  
  			set: function( elem, value ) {
  				var optionSet, option,
  					options = elem.options,
  					values = jQuery.makeArray( value ),
  					i = options.length;
  
  				while ( i-- ) {
  					option = options[ i ];
  
  					/* eslint-disable no-cond-assign */
  
  					if ( option.selected =
  						jQuery.inArray( jQuery.valHooks.option.get( option ), values ) > -1
  					) {
  						optionSet = true;
  					}
  
  					/* eslint-enable no-cond-assign */
  				}
  
  				// Force browsers to behave consistently when non-matching value is set
  				if ( !optionSet ) {
  					elem.selectedIndex = -1;
  				}
  				return values;
  			}
  		}
  	}
  } );
  
  // Radios and checkboxes getter/setter
  jQuery.each( [ "radio", "checkbox" ], function() {
  	jQuery.valHooks[ this ] = {
  		set: function( elem, value ) {
  			if ( Array.isArray( value ) ) {
  				return ( elem.checked = jQuery.inArray( jQuery( elem ).val(), value ) > -1 );
  			}
  		}
  	};
  	if ( !support.checkOn ) {
  		jQuery.valHooks[ this ].get = function( elem ) {
  			return elem.getAttribute( "value" ) === null ? "on" : elem.value;
  		};
  	}
  } );
  
  
  
  
  // Return jQuery for attributes-only inclusion
  
  
  support.focusin = "onfocusin" in window;
  
  
  var rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
  	stopPropagationCallback = function( e ) {
  		e.stopPropagation();
  	};
  
  jQuery.extend( jQuery.event, {
  
  	trigger: function( event, data, elem, onlyHandlers ) {
  
  		var i, cur, tmp, bubbleType, ontype, handle, special, lastElement,
  			eventPath = [ elem || document ],
  			type = hasOwn.call( event, "type" ) ? event.type : event,
  			namespaces = hasOwn.call( event, "namespace" ) ? event.namespace.split( "." ) : [];
  
  		cur = lastElement = tmp = elem = elem || document;
  
  		// Don't do events on text and comment nodes
  		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
  			return;
  		}
  
  		// focus/blur morphs to focusin/out; ensure we're not firing them right now
  		if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
  			return;
  		}
  
  		if ( type.indexOf( "." ) > -1 ) {
  
  			// Namespaced trigger; create a regexp to match event type in handle()
  			namespaces = type.split( "." );
  			type = namespaces.shift();
  			namespaces.sort();
  		}
  		ontype = type.indexOf( ":" ) < 0 && "on" + type;
  
  		// Caller can pass in a jQuery.Event object, Object, or just an event type string
  		event = event[ jQuery.expando ] ?
  			event :
  			new jQuery.Event( type, typeof event === "object" && event );
  
  		// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)
  		event.isTrigger = onlyHandlers ? 2 : 3;
  		event.namespace = namespaces.join( "." );
  		event.rnamespace = event.namespace ?
  			new RegExp( "(^|\\.)" + namespaces.join( "\\.(?:.*\\.|)" ) + "(\\.|$)" ) :
  			null;
  
  		// Clean up the event in case it is being reused
  		event.result = undefined;
  		if ( !event.target ) {
  			event.target = elem;
  		}
  
  		// Clone any incoming data and prepend the event, creating the handler arg list
  		data = data == null ?
  			[ event ] :
  			jQuery.makeArray( data, [ event ] );
  
  		// Allow special events to draw outside the lines
  		special = jQuery.event.special[ type ] || {};
  		if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
  			return;
  		}
  
  		// Determine event propagation path in advance, per W3C events spec (#9951)
  		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
  		if ( !onlyHandlers && !special.noBubble && !isWindow( elem ) ) {
  
  			bubbleType = special.delegateType || type;
  			if ( !rfocusMorph.test( bubbleType + type ) ) {
  				cur = cur.parentNode;
  			}
  			for ( ; cur; cur = cur.parentNode ) {
  				eventPath.push( cur );
  				tmp = cur;
  			}
  
  			// Only add window if we got to document (e.g., not plain obj or detached DOM)
  			if ( tmp === ( elem.ownerDocument || document ) ) {
  				eventPath.push( tmp.defaultView || tmp.parentWindow || window );
  			}
  		}
  
  		// Fire handlers on the event path
  		i = 0;
  		while ( ( cur = eventPath[ i++ ] ) && !event.isPropagationStopped() ) {
  			lastElement = cur;
  			event.type = i > 1 ?
  				bubbleType :
  				special.bindType || type;
  
  			// jQuery handler
  			handle = ( dataPriv.get( cur, "events" ) || {} )[ event.type ] &&
  				dataPriv.get( cur, "handle" );
  			if ( handle ) {
  				handle.apply( cur, data );
  			}
  
  			// Native handler
  			handle = ontype && cur[ ontype ];
  			if ( handle && handle.apply && acceptData( cur ) ) {
  				event.result = handle.apply( cur, data );
  				if ( event.result === false ) {
  					event.preventDefault();
  				}
  			}
  		}
  		event.type = type;
  
  		// If nobody prevented the default action, do it now
  		if ( !onlyHandlers && !event.isDefaultPrevented() ) {
  
  			if ( ( !special._default ||
  				special._default.apply( eventPath.pop(), data ) === false ) &&
  				acceptData( elem ) ) {
  
  				// Call a native DOM method on the target with the same name as the event.
  				// Don't do default actions on window, that's where global variables be (#6170)
  				if ( ontype && isFunction( elem[ type ] ) && !isWindow( elem ) ) {
  
  					// Don't re-trigger an onFOO event when we call its FOO() method
  					tmp = elem[ ontype ];
  
  					if ( tmp ) {
  						elem[ ontype ] = null;
  					}
  
  					// Prevent re-triggering of the same event, since we already bubbled it above
  					jQuery.event.triggered = type;
  
  					if ( event.isPropagationStopped() ) {
  						lastElement.addEventListener( type, stopPropagationCallback );
  					}
  
  					elem[ type ]();
  
  					if ( event.isPropagationStopped() ) {
  						lastElement.removeEventListener( type, stopPropagationCallback );
  					}
  
  					jQuery.event.triggered = undefined;
  
  					if ( tmp ) {
  						elem[ ontype ] = tmp;
  					}
  				}
  			}
  		}
  
  		return event.result;
  	},
  
  	// Piggyback on a donor event to simulate a different one
  	// Used only for `focus(in | out)` events
  	simulate: function( type, elem, event ) {
  		var e = jQuery.extend(
  			new jQuery.Event(),
  			event,
  			{
  				type: type,
  				isSimulated: true
  			}
  		);
  
  		jQuery.event.trigger( e, null, elem );
  	}
  
  } );
  
  jQuery.fn.extend( {
  
  	trigger: function( type, data ) {
  		return this.each( function() {
  			jQuery.event.trigger( type, data, this );
  		} );
  	},
  	triggerHandler: function( type, data ) {
  		var elem = this[ 0 ];
  		if ( elem ) {
  			return jQuery.event.trigger( type, data, elem, true );
  		}
  	}
  } );
  
  
  // Support: Firefox <=44
  // Firefox doesn't have focus(in | out) events
  // Related ticket - https://bugzilla.mozilla.org/show_bug.cgi?id=687787
  //
  // Support: Chrome <=48 - 49, Safari <=9.0 - 9.1
  // focus(in | out) events fire after focus & blur events,
  // which is spec violation - http://www.w3.org/TR/DOM-Level-3-Events/#events-focusevent-event-order
  // Related ticket - https://bugs.chromium.org/p/chromium/issues/detail?id=449857
  if ( !support.focusin ) {
  	jQuery.each( { focus: "focusin", blur: "focusout" }, function( orig, fix ) {
  
  		// Attach a single capturing handler on the document while someone wants focusin/focusout
  		var handler = function( event ) {
  			jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ) );
  		};
  
  		jQuery.event.special[ fix ] = {
  			setup: function() {
  				var doc = this.ownerDocument || this,
  					attaches = dataPriv.access( doc, fix );
  
  				if ( !attaches ) {
  					doc.addEventListener( orig, handler, true );
  				}
  				dataPriv.access( doc, fix, ( attaches || 0 ) + 1 );
  			},
  			teardown: function() {
  				var doc = this.ownerDocument || this,
  					attaches = dataPriv.access( doc, fix ) - 1;
  
  				if ( !attaches ) {
  					doc.removeEventListener( orig, handler, true );
  					dataPriv.remove( doc, fix );
  
  				} else {
  					dataPriv.access( doc, fix, attaches );
  				}
  			}
  		};
  	} );
  }
  var location = window.location;
  
  var nonce = Date.now();
  
  var rquery = ( /\?/ );
  
  
  
  // Cross-browser xml parsing
  jQuery.parseXML = function( data ) {
  	var xml;
  	if ( !data || typeof data !== "string" ) {
  		return null;
  	}
  
  	// Support: IE 9 - 11 only
  	// IE throws on parseFromString with invalid input.
  	try {
  		xml = ( new window.DOMParser() ).parseFromString( data, "text/xml" );
  	} catch ( e ) {
  		xml = undefined;
  	}
  
  	if ( !xml || xml.getElementsByTagName( "parsererror" ).length ) {
  		jQuery.error( "Invalid XML: " + data );
  	}
  	return xml;
  };
  
  
  var
  	rbracket = /\[\]$/,
  	rCRLF = /\r?\n/g,
  	rsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,
  	rsubmittable = /^(?:input|select|textarea|keygen)/i;
  
  function buildParams( prefix, obj, traditional, add ) {
  	var name;
  
  	if ( Array.isArray( obj ) ) {
  
  		// Serialize array item.
  		jQuery.each( obj, function( i, v ) {
  			if ( traditional || rbracket.test( prefix ) ) {
  
  				// Treat each array item as a scalar.
  				add( prefix, v );
  
  			} else {
  
  				// Item is non-scalar (array or object), encode its numeric index.
  				buildParams(
  					prefix + "[" + ( typeof v === "object" && v != null ? i : "" ) + "]",
  					v,
  					traditional,
  					add
  				);
  			}
  		} );
  
  	} else if ( !traditional && toType( obj ) === "object" ) {
  
  		// Serialize object item.
  		for ( name in obj ) {
  			buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
  		}
  
  	} else {
  
  		// Serialize scalar item.
  		add( prefix, obj );
  	}
  }
  
  // Serialize an array of form elements or a set of
  // key/values into a query string
  jQuery.param = function( a, traditional ) {
  	var prefix,
  		s = [],
  		add = function( key, valueOrFunction ) {
  
  			// If value is a function, invoke it and use its return value
  			var value = isFunction( valueOrFunction ) ?
  				valueOrFunction() :
  				valueOrFunction;
  
  			s[ s.length ] = encodeURIComponent( key ) + "=" +
  				encodeURIComponent( value == null ? "" : value );
  		};
  
  	// If an array was passed in, assume that it is an array of form elements.
  	if ( Array.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
  
  		// Serialize the form elements
  		jQuery.each( a, function() {
  			add( this.name, this.value );
  		} );
  
  	} else {
  
  		// If traditional, encode the "old" way (the way 1.3.2 or older
  		// did it), otherwise encode params recursively.
  		for ( prefix in a ) {
  			buildParams( prefix, a[ prefix ], traditional, add );
  		}
  	}
  
  	// Return the resulting serialization
  	return s.join( "&" );
  };
  
  jQuery.fn.extend( {
  	serialize: function() {
  		return jQuery.param( this.serializeArray() );
  	},
  	serializeArray: function() {
  		return this.map( function() {
  
  			// Can add propHook for "elements" to filter or add form elements
  			var elements = jQuery.prop( this, "elements" );
  			return elements ? jQuery.makeArray( elements ) : this;
  		} )
  		.filter( function() {
  			var type = this.type;
  
  			// Use .is( ":disabled" ) so that fieldset[disabled] works
  			return this.name && !jQuery( this ).is( ":disabled" ) &&
  				rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
  				( this.checked || !rcheckableType.test( type ) );
  		} )
  		.map( function( i, elem ) {
  			var val = jQuery( this ).val();
  
  			if ( val == null ) {
  				return null;
  			}
  
  			if ( Array.isArray( val ) ) {
  				return jQuery.map( val, function( val ) {
  					return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
  				} );
  			}
  
  			return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
  		} ).get();
  	}
  } );
  
  
  var
  	r20 = /%20/g,
  	rhash = /#.*$/,
  	rantiCache = /([?&])_=[^&]*/,
  	rheaders = /^(.*?):[ \t]*([^\r\n]*)$/mg,
  
  	// #7653, #8125, #8152: local protocol detection
  	rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
  	rnoContent = /^(?:GET|HEAD)$/,
  	rprotocol = /^\/\//,
  
  	/* Prefilters
  	 * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
  	 * 2) These are called:
  	 *    - BEFORE asking for a transport
  	 *    - AFTER param serialization (s.data is a string if s.processData is true)
  	 * 3) key is the dataType
  	 * 4) the catchall symbol "*" can be used
  	 * 5) execution will start with transport dataType and THEN continue down to "*" if needed
  	 */
  	prefilters = {},
  
  	/* Transports bindings
  	 * 1) key is the dataType
  	 * 2) the catchall symbol "*" can be used
  	 * 3) selection will start with transport dataType and THEN go to "*" if needed
  	 */
  	transports = {},
  
  	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
  	allTypes = "*/".concat( "*" ),
  
  	// Anchor tag for parsing the document origin
  	originAnchor = document.createElement( "a" );
  	originAnchor.href = location.href;
  
  // Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
  function addToPrefiltersOrTransports( structure ) {
  
  	// dataTypeExpression is optional and defaults to "*"
  	return function( dataTypeExpression, func ) {
  
  		if ( typeof dataTypeExpression !== "string" ) {
  			func = dataTypeExpression;
  			dataTypeExpression = "*";
  		}
  
  		var dataType,
  			i = 0,
  			dataTypes = dataTypeExpression.toLowerCase().match( rnothtmlwhite ) || [];
  
  		if ( isFunction( func ) ) {
  
  			// For each dataType in the dataTypeExpression
  			while ( ( dataType = dataTypes[ i++ ] ) ) {
  
  				// Prepend if requested
  				if ( dataType[ 0 ] === "+" ) {
  					dataType = dataType.slice( 1 ) || "*";
  					( structure[ dataType ] = structure[ dataType ] || [] ).unshift( func );
  
  				// Otherwise append
  				} else {
  					( structure[ dataType ] = structure[ dataType ] || [] ).push( func );
  				}
  			}
  		}
  	};
  }
  
  // Base inspection function for prefilters and transports
  function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {
  
  	var inspected = {},
  		seekingTransport = ( structure === transports );
  
  	function inspect( dataType ) {
  		var selected;
  		inspected[ dataType ] = true;
  		jQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {
  			var dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );
  			if ( typeof dataTypeOrTransport === "string" &&
  				!seekingTransport && !inspected[ dataTypeOrTransport ] ) {
  
  				options.dataTypes.unshift( dataTypeOrTransport );
  				inspect( dataTypeOrTransport );
  				return false;
  			} else if ( seekingTransport ) {
  				return !( selected = dataTypeOrTransport );
  			}
  		} );
  		return selected;
  	}
  
  	return inspect( options.dataTypes[ 0 ] ) || !inspected[ "*" ] && inspect( "*" );
  }
  
  // A special extend for ajax options
  // that takes "flat" options (not to be deep extended)
  // Fixes #9887
  function ajaxExtend( target, src ) {
  	var key, deep,
  		flatOptions = jQuery.ajaxSettings.flatOptions || {};
  
  	for ( key in src ) {
  		if ( src[ key ] !== undefined ) {
  			( flatOptions[ key ] ? target : ( deep || ( deep = {} ) ) )[ key ] = src[ key ];
  		}
  	}
  	if ( deep ) {
  		jQuery.extend( true, target, deep );
  	}
  
  	return target;
  }
  
  /* Handles responses to an ajax request:
   * - finds the right dataType (mediates between content-type and expected dataType)
   * - returns the corresponding response
   */
  function ajaxHandleResponses( s, jqXHR, responses ) {
  
  	var ct, type, finalDataType, firstDataType,
  		contents = s.contents,
  		dataTypes = s.dataTypes;
  
  	// Remove auto dataType and get content-type in the process
  	while ( dataTypes[ 0 ] === "*" ) {
  		dataTypes.shift();
  		if ( ct === undefined ) {
  			ct = s.mimeType || jqXHR.getResponseHeader( "Content-Type" );
  		}
  	}
  
  	// Check if we're dealing with a known content-type
  	if ( ct ) {
  		for ( type in contents ) {
  			if ( contents[ type ] && contents[ type ].test( ct ) ) {
  				dataTypes.unshift( type );
  				break;
  			}
  		}
  	}
  
  	// Check to see if we have a response for the expected dataType
  	if ( dataTypes[ 0 ] in responses ) {
  		finalDataType = dataTypes[ 0 ];
  	} else {
  
  		// Try convertible dataTypes
  		for ( type in responses ) {
  			if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[ 0 ] ] ) {
  				finalDataType = type;
  				break;
  			}
  			if ( !firstDataType ) {
  				firstDataType = type;
  			}
  		}
  
  		// Or just use first one
  		finalDataType = finalDataType || firstDataType;
  	}
  
  	// If we found a dataType
  	// We add the dataType to the list if needed
  	// and return the corresponding response
  	if ( finalDataType ) {
  		if ( finalDataType !== dataTypes[ 0 ] ) {
  			dataTypes.unshift( finalDataType );
  		}
  		return responses[ finalDataType ];
  	}
  }
  
  /* Chain conversions given the request and the original response
   * Also sets the responseXXX fields on the jqXHR instance
   */
  function ajaxConvert( s, response, jqXHR, isSuccess ) {
  	var conv2, current, conv, tmp, prev,
  		converters = {},
  
  		// Work with a copy of dataTypes in case we need to modify it for conversion
  		dataTypes = s.dataTypes.slice();
  
  	// Create converters map with lowercased keys
  	if ( dataTypes[ 1 ] ) {
  		for ( conv in s.converters ) {
  			converters[ conv.toLowerCase() ] = s.converters[ conv ];
  		}
  	}
  
  	current = dataTypes.shift();
  
  	// Convert to each sequential dataType
  	while ( current ) {
  
  		if ( s.responseFields[ current ] ) {
  			jqXHR[ s.responseFields[ current ] ] = response;
  		}
  
  		// Apply the dataFilter if provided
  		if ( !prev && isSuccess && s.dataFilter ) {
  			response = s.dataFilter( response, s.dataType );
  		}
  
  		prev = current;
  		current = dataTypes.shift();
  
  		if ( current ) {
  
  			// There's only work to do if current dataType is non-auto
  			if ( current === "*" ) {
  
  				current = prev;
  
  			// Convert response if prev dataType is non-auto and differs from current
  			} else if ( prev !== "*" && prev !== current ) {
  
  				// Seek a direct converter
  				conv = converters[ prev + " " + current ] || converters[ "* " + current ];
  
  				// If none found, seek a pair
  				if ( !conv ) {
  					for ( conv2 in converters ) {
  
  						// If conv2 outputs current
  						tmp = conv2.split( " " );
  						if ( tmp[ 1 ] === current ) {
  
  							// If prev can be converted to accepted input
  							conv = converters[ prev + " " + tmp[ 0 ] ] ||
  								converters[ "* " + tmp[ 0 ] ];
  							if ( conv ) {
  
  								// Condense equivalence converters
  								if ( conv === true ) {
  									conv = converters[ conv2 ];
  
  								// Otherwise, insert the intermediate dataType
  								} else if ( converters[ conv2 ] !== true ) {
  									current = tmp[ 0 ];
  									dataTypes.unshift( tmp[ 1 ] );
  								}
  								break;
  							}
  						}
  					}
  				}
  
  				// Apply converter (if not an equivalence)
  				if ( conv !== true ) {
  
  					// Unless errors are allowed to bubble, catch and return them
  					if ( conv && s.throws ) {
  						response = conv( response );
  					} else {
  						try {
  							response = conv( response );
  						} catch ( e ) {
  							return {
  								state: "parsererror",
  								error: conv ? e : "No conversion from " + prev + " to " + current
  							};
  						}
  					}
  				}
  			}
  		}
  	}
  
  	return { state: "success", data: response };
  }
  
  jQuery.extend( {
  
  	// Counter for holding the number of active queries
  	active: 0,
  
  	// Last-Modified header cache for next request
  	lastModified: {},
  	etag: {},
  
  	ajaxSettings: {
  		url: location.href,
  		type: "GET",
  		isLocal: rlocalProtocol.test( location.protocol ),
  		global: true,
  		processData: true,
  		async: true,
  		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
  
  		/*
  		timeout: 0,
  		data: null,
  		dataType: null,
  		username: null,
  		password: null,
  		cache: null,
  		throws: false,
  		traditional: false,
  		headers: {},
  		*/
  
  		accepts: {
  			"*": allTypes,
  			text: "text/plain",
  			html: "text/html",
  			xml: "application/xml, text/xml",
  			json: "application/json, text/javascript"
  		},
  
  		contents: {
  			xml: /\bxml\b/,
  			html: /\bhtml/,
  			json: /\bjson\b/
  		},
  
  		responseFields: {
  			xml: "responseXML",
  			text: "responseText",
  			json: "responseJSON"
  		},
  
  		// Data converters
  		// Keys separate source (or catchall "*") and destination types with a single space
  		converters: {
  
  			// Convert anything to text
  			"* text": String,
  
  			// Text to html (true = no transformation)
  			"text html": true,
  
  			// Evaluate text as a json expression
  			"text json": JSON.parse,
  
  			// Parse text as xml
  			"text xml": jQuery.parseXML
  		},
  
  		// For options that shouldn't be deep extended:
  		// you can add your own custom options here if
  		// and when you create one that shouldn't be
  		// deep extended (see ajaxExtend)
  		flatOptions: {
  			url: true,
  			context: true
  		}
  	},
  
  	// Creates a full fledged settings object into target
  	// with both ajaxSettings and settings fields.
  	// If target is omitted, writes into ajaxSettings.
  	ajaxSetup: function( target, settings ) {
  		return settings ?
  
  			// Building a settings object
  			ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :
  
  			// Extending ajaxSettings
  			ajaxExtend( jQuery.ajaxSettings, target );
  	},
  
  	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
  	ajaxTransport: addToPrefiltersOrTransports( transports ),
  
  	// Main method
  	ajax: function( url, options ) {
  
  		// If url is an object, simulate pre-1.5 signature
  		if ( typeof url === "object" ) {
  			options = url;
  			url = undefined;
  		}
  
  		// Force options to be an object
  		options = options || {};
  
  		var transport,
  
  			// URL without anti-cache param
  			cacheURL,
  
  			// Response headers
  			responseHeadersString,
  			responseHeaders,
  
  			// timeout handle
  			timeoutTimer,
  
  			// Url cleanup var
  			urlAnchor,
  
  			// Request state (becomes false upon send and true upon completion)
  			completed,
  
  			// To know if global events are to be dispatched
  			fireGlobals,
  
  			// Loop variable
  			i,
  
  			// uncached part of the url
  			uncached,
  
  			// Create the final options object
  			s = jQuery.ajaxSetup( {}, options ),
  
  			// Callbacks context
  			callbackContext = s.context || s,
  
  			// Context for global events is callbackContext if it is a DOM node or jQuery collection
  			globalEventContext = s.context &&
  				( callbackContext.nodeType || callbackContext.jquery ) ?
  					jQuery( callbackContext ) :
  					jQuery.event,
  
  			// Deferreds
  			deferred = jQuery.Deferred(),
  			completeDeferred = jQuery.Callbacks( "once memory" ),
  
  			// Status-dependent callbacks
  			statusCode = s.statusCode || {},
  
  			// Headers (they are sent all at once)
  			requestHeaders = {},
  			requestHeadersNames = {},
  
  			// Default abort message
  			strAbort = "canceled",
  
  			// Fake xhr
  			jqXHR = {
  				readyState: 0,
  
  				// Builds headers hashtable if needed
  				getResponseHeader: function( key ) {
  					var match;
  					if ( completed ) {
  						if ( !responseHeaders ) {
  							responseHeaders = {};
  							while ( ( match = rheaders.exec( responseHeadersString ) ) ) {
  								responseHeaders[ match[ 1 ].toLowerCase() ] = match[ 2 ];
  							}
  						}
  						match = responseHeaders[ key.toLowerCase() ];
  					}
  					return match == null ? null : match;
  				},
  
  				// Raw string
  				getAllResponseHeaders: function() {
  					return completed ? responseHeadersString : null;
  				},
  
  				// Caches the header
  				setRequestHeader: function( name, value ) {
  					if ( completed == null ) {
  						name = requestHeadersNames[ name.toLowerCase() ] =
  							requestHeadersNames[ name.toLowerCase() ] || name;
  						requestHeaders[ name ] = value;
  					}
  					return this;
  				},
  
  				// Overrides response content-type header
  				overrideMimeType: function( type ) {
  					if ( completed == null ) {
  						s.mimeType = type;
  					}
  					return this;
  				},
  
  				// Status-dependent callbacks
  				statusCode: function( map ) {
  					var code;
  					if ( map ) {
  						if ( completed ) {
  
  							// Execute the appropriate callbacks
  							jqXHR.always( map[ jqXHR.status ] );
  						} else {
  
  							// Lazy-add the new callbacks in a way that preserves old ones
  							for ( code in map ) {
  								statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
  							}
  						}
  					}
  					return this;
  				},
  
  				// Cancel the request
  				abort: function( statusText ) {
  					var finalText = statusText || strAbort;
  					if ( transport ) {
  						transport.abort( finalText );
  					}
  					done( 0, finalText );
  					return this;
  				}
  			};
  
  		// Attach deferreds
  		deferred.promise( jqXHR );
  
  		// Add protocol if not provided (prefilters might expect it)
  		// Handle falsy url in the settings object (#10093: consistency with old signature)
  		// We also use the url parameter if available
  		s.url = ( ( url || s.url || location.href ) + "" )
  			.replace( rprotocol, location.protocol + "//" );
  
  		// Alias method option to type as per ticket #12004
  		s.type = options.method || options.type || s.method || s.type;
  
  		// Extract dataTypes list
  		s.dataTypes = ( s.dataType || "*" ).toLowerCase().match( rnothtmlwhite ) || [ "" ];
  
  		// A cross-domain request is in order when the origin doesn't match the current origin.
  		if ( s.crossDomain == null ) {
  			urlAnchor = document.createElement( "a" );
  
  			// Support: IE <=8 - 11, Edge 12 - 15
  			// IE throws exception on accessing the href property if url is malformed,
  			// e.g. http://example.com:80x/
  			try {
  				urlAnchor.href = s.url;
  
  				// Support: IE <=8 - 11 only
  				// Anchor's host property isn't correctly set when s.url is relative
  				urlAnchor.href = urlAnchor.href;
  				s.crossDomain = originAnchor.protocol + "//" + originAnchor.host !==
  					urlAnchor.protocol + "//" + urlAnchor.host;
  			} catch ( e ) {
  
  				// If there is an error parsing the URL, assume it is crossDomain,
  				// it can be rejected by the transport if it is invalid
  				s.crossDomain = true;
  			}
  		}
  
  		// Convert data if not already a string
  		if ( s.data && s.processData && typeof s.data !== "string" ) {
  			s.data = jQuery.param( s.data, s.traditional );
  		}
  
  		// Apply prefilters
  		inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );
  
  		// If request was aborted inside a prefilter, stop there
  		if ( completed ) {
  			return jqXHR;
  		}
  
  		// We can fire global events as of now if asked to
  		// Don't fire events if jQuery.event is undefined in an AMD-usage scenario (#15118)
  		fireGlobals = jQuery.event && s.global;
  
  		// Watch for a new set of requests
  		if ( fireGlobals && jQuery.active++ === 0 ) {
  			jQuery.event.trigger( "ajaxStart" );
  		}
  
  		// Uppercase the type
  		s.type = s.type.toUpperCase();
  
  		// Determine if request has content
  		s.hasContent = !rnoContent.test( s.type );
  
  		// Save the URL in case we're toying with the If-Modified-Since
  		// and/or If-None-Match header later on
  		// Remove hash to simplify url manipulation
  		cacheURL = s.url.replace( rhash, "" );
  
  		// More options handling for requests with no content
  		if ( !s.hasContent ) {
  
  			// Remember the hash so we can put it back
  			uncached = s.url.slice( cacheURL.length );
  
  			// If data is available and should be processed, append data to url
  			if ( s.data && ( s.processData || typeof s.data === "string" ) ) {
  				cacheURL += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data;
  
  				// #9682: remove data so that it's not used in an eventual retry
  				delete s.data;
  			}
  
  			// Add or update anti-cache param if needed
  			if ( s.cache === false ) {
  				cacheURL = cacheURL.replace( rantiCache, "$1" );
  				uncached = ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + ( nonce++ ) + uncached;
  			}
  
  			// Put hash and anti-cache on the URL that will be requested (gh-1732)
  			s.url = cacheURL + uncached;
  
  		// Change '%20' to '+' if this is encoded form body content (gh-2658)
  		} else if ( s.data && s.processData &&
  			( s.contentType || "" ).indexOf( "application/x-www-form-urlencoded" ) === 0 ) {
  			s.data = s.data.replace( r20, "+" );
  		}
  
  		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
  		if ( s.ifModified ) {
  			if ( jQuery.lastModified[ cacheURL ] ) {
  				jqXHR.setRequestHeader( "If-Modified-Since", jQuery.lastModified[ cacheURL ] );
  			}
  			if ( jQuery.etag[ cacheURL ] ) {
  				jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
  			}
  		}
  
  		// Set the correct header, if data is being sent
  		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
  			jqXHR.setRequestHeader( "Content-Type", s.contentType );
  		}
  
  		// Set the Accepts header for the server, depending on the dataType
  		jqXHR.setRequestHeader(
  			"Accept",
  			s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[ 0 ] ] ?
  				s.accepts[ s.dataTypes[ 0 ] ] +
  					( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
  				s.accepts[ "*" ]
  		);
  
  		// Check for headers option
  		for ( i in s.headers ) {
  			jqXHR.setRequestHeader( i, s.headers[ i ] );
  		}
  
  		// Allow custom headers/mimetypes and early abort
  		if ( s.beforeSend &&
  			( s.beforeSend.call( callbackContext, jqXHR, s ) === false || completed ) ) {
  
  			// Abort if not done already and return
  			return jqXHR.abort();
  		}
  
  		// Aborting is no longer a cancellation
  		strAbort = "abort";
  
  		// Install callbacks on deferreds
  		completeDeferred.add( s.complete );
  		jqXHR.done( s.success );
  		jqXHR.fail( s.error );
  
  		// Get transport
  		transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );
  
  		// If no transport, we auto-abort
  		if ( !transport ) {
  			done( -1, "No Transport" );
  		} else {
  			jqXHR.readyState = 1;
  
  			// Send global event
  			if ( fireGlobals ) {
  				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
  			}
  
  			// If request was aborted inside ajaxSend, stop there
  			if ( completed ) {
  				return jqXHR;
  			}
  
  			// Timeout
  			if ( s.async && s.timeout > 0 ) {
  				timeoutTimer = window.setTimeout( function() {
  					jqXHR.abort( "timeout" );
  				}, s.timeout );
  			}
  
  			try {
  				completed = false;
  				transport.send( requestHeaders, done );
  			} catch ( e ) {
  
  				// Rethrow post-completion exceptions
  				if ( completed ) {
  					throw e;
  				}
  
  				// Propagate others as results
  				done( -1, e );
  			}
  		}
  
  		// Callback for when everything is done
  		function done( status, nativeStatusText, responses, headers ) {
  			var isSuccess, success, error, response, modified,
  				statusText = nativeStatusText;
  
  			// Ignore repeat invocations
  			if ( completed ) {
  				return;
  			}
  
  			completed = true;
  
  			// Clear timeout if it exists
  			if ( timeoutTimer ) {
  				window.clearTimeout( timeoutTimer );
  			}
  
  			// Dereference transport for early garbage collection
  			// (no matter how long the jqXHR object will be used)
  			transport = undefined;
  
  			// Cache response headers
  			responseHeadersString = headers || "";
  
  			// Set readyState
  			jqXHR.readyState = status > 0 ? 4 : 0;
  
  			// Determine if successful
  			isSuccess = status >= 200 && status < 300 || status === 304;
  
  			// Get response data
  			if ( responses ) {
  				response = ajaxHandleResponses( s, jqXHR, responses );
  			}
  
  			// Convert no matter what (that way responseXXX fields are always set)
  			response = ajaxConvert( s, response, jqXHR, isSuccess );
  
  			// If successful, handle type chaining
  			if ( isSuccess ) {
  
  				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
  				if ( s.ifModified ) {
  					modified = jqXHR.getResponseHeader( "Last-Modified" );
  					if ( modified ) {
  						jQuery.lastModified[ cacheURL ] = modified;
  					}
  					modified = jqXHR.getResponseHeader( "etag" );
  					if ( modified ) {
  						jQuery.etag[ cacheURL ] = modified;
  					}
  				}
  
  				// if no content
  				if ( status === 204 || s.type === "HEAD" ) {
  					statusText = "nocontent";
  
  				// if not modified
  				} else if ( status === 304 ) {
  					statusText = "notmodified";
  
  				// If we have data, let's convert it
  				} else {
  					statusText = response.state;
  					success = response.data;
  					error = response.error;
  					isSuccess = !error;
  				}
  			} else {
  
  				// Extract error from statusText and normalize for non-aborts
  				error = statusText;
  				if ( status || !statusText ) {
  					statusText = "error";
  					if ( status < 0 ) {
  						status = 0;
  					}
  				}
  			}
  
  			// Set data for the fake xhr object
  			jqXHR.status = status;
  			jqXHR.statusText = ( nativeStatusText || statusText ) + "";
  
  			// Success/Error
  			if ( isSuccess ) {
  				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
  			} else {
  				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
  			}
  
  			// Status-dependent callbacks
  			jqXHR.statusCode( statusCode );
  			statusCode = undefined;
  
  			if ( fireGlobals ) {
  				globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
  					[ jqXHR, s, isSuccess ? success : error ] );
  			}
  
  			// Complete
  			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );
  
  			if ( fireGlobals ) {
  				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
  
  				// Handle the global AJAX counter
  				if ( !( --jQuery.active ) ) {
  					jQuery.event.trigger( "ajaxStop" );
  				}
  			}
  		}
  
  		return jqXHR;
  	},
  
  	getJSON: function( url, data, callback ) {
  		return jQuery.get( url, data, callback, "json" );
  	},
  
  	getScript: function( url, callback ) {
  		return jQuery.get( url, undefined, callback, "script" );
  	}
  } );
  
  jQuery.each( [ "get", "post" ], function( i, method ) {
  	jQuery[ method ] = function( url, data, callback, type ) {
  
  		// Shift arguments if data argument was omitted
  		if ( isFunction( data ) ) {
  			type = type || callback;
  			callback = data;
  			data = undefined;
  		}
  
  		// The url can be an options object (which then must have .url)
  		return jQuery.ajax( jQuery.extend( {
  			url: url,
  			type: method,
  			dataType: type,
  			data: data,
  			success: callback
  		}, jQuery.isPlainObject( url ) && url ) );
  	};
  } );
  
  
  jQuery._evalUrl = function( url ) {
  	return jQuery.ajax( {
  		url: url,
  
  		// Make this explicit, since user can override this through ajaxSetup (#11264)
  		type: "GET",
  		dataType: "script",
  		cache: true,
  		async: false,
  		global: false,
  		"throws": true
  	} );
  };
  
  
  jQuery.fn.extend( {
  	wrapAll: function( html ) {
  		var wrap;
  
  		if ( this[ 0 ] ) {
  			if ( isFunction( html ) ) {
  				html = html.call( this[ 0 ] );
  			}
  
  			// The elements to wrap the target around
  			wrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true );
  
  			if ( this[ 0 ].parentNode ) {
  				wrap.insertBefore( this[ 0 ] );
  			}
  
  			wrap.map( function() {
  				var elem = this;
  
  				while ( elem.firstElementChild ) {
  					elem = elem.firstElementChild;
  				}
  
  				return elem;
  			} ).append( this );
  		}
  
  		return this;
  	},
  
  	wrapInner: function( html ) {
  		if ( isFunction( html ) ) {
  			return this.each( function( i ) {
  				jQuery( this ).wrapInner( html.call( this, i ) );
  			} );
  		}
  
  		return this.each( function() {
  			var self = jQuery( this ),
  				contents = self.contents();
  
  			if ( contents.length ) {
  				contents.wrapAll( html );
  
  			} else {
  				self.append( html );
  			}
  		} );
  	},
  
  	wrap: function( html ) {
  		var htmlIsFunction = isFunction( html );
  
  		return this.each( function( i ) {
  			jQuery( this ).wrapAll( htmlIsFunction ? html.call( this, i ) : html );
  		} );
  	},
  
  	unwrap: function( selector ) {
  		this.parent( selector ).not( "body" ).each( function() {
  			jQuery( this ).replaceWith( this.childNodes );
  		} );
  		return this;
  	}
  } );
  
  
  jQuery.expr.pseudos.hidden = function( elem ) {
  	return !jQuery.expr.pseudos.visible( elem );
  };
  jQuery.expr.pseudos.visible = function( elem ) {
  	return !!( elem.offsetWidth || elem.offsetHeight || elem.getClientRects().length );
  };
  
  
  
  
  jQuery.ajaxSettings.xhr = function() {
  	try {
  		return new window.XMLHttpRequest();
  	} catch ( e ) {}
  };
  
  var xhrSuccessStatus = {
  
  		// File protocol always yields status code 0, assume 200
  		0: 200,
  
  		// Support: IE <=9 only
  		// #1450: sometimes IE returns 1223 when it should be 204
  		1223: 204
  	},
  	xhrSupported = jQuery.ajaxSettings.xhr();
  
  support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
  support.ajax = xhrSupported = !!xhrSupported;
  
  jQuery.ajaxTransport( function( options ) {
  	var callback, errorCallback;
  
  	// Cross domain only allowed if supported through XMLHttpRequest
  	if ( support.cors || xhrSupported && !options.crossDomain ) {
  		return {
  			send: function( headers, complete ) {
  				var i,
  					xhr = options.xhr();
  
  				xhr.open(
  					options.type,
  					options.url,
  					options.async,
  					options.username,
  					options.password
  				);
  
  				// Apply custom fields if provided
  				if ( options.xhrFields ) {
  					for ( i in options.xhrFields ) {
  						xhr[ i ] = options.xhrFields[ i ];
  					}
  				}
  
  				// Override mime type if needed
  				if ( options.mimeType && xhr.overrideMimeType ) {
  					xhr.overrideMimeType( options.mimeType );
  				}
  
  				// X-Requested-With header
  				// For cross-domain requests, seeing as conditions for a preflight are
  				// akin to a jigsaw puzzle, we simply never set it to be sure.
  				// (it can always be set on a per-request basis or even using ajaxSetup)
  				// For same-domain requests, won't change header if already provided.
  				if ( !options.crossDomain && !headers[ "X-Requested-With" ] ) {
  					headers[ "X-Requested-With" ] = "XMLHttpRequest";
  				}
  
  				// Set headers
  				for ( i in headers ) {
  					xhr.setRequestHeader( i, headers[ i ] );
  				}
  
  				// Callback
  				callback = function( type ) {
  					return function() {
  						if ( callback ) {
  							callback = errorCallback = xhr.onload =
  								xhr.onerror = xhr.onabort = xhr.ontimeout =
  									xhr.onreadystatechange = null;
  
  							if ( type === "abort" ) {
  								xhr.abort();
  							} else if ( type === "error" ) {
  
  								// Support: IE <=9 only
  								// On a manual native abort, IE9 throws
  								// errors on any property access that is not readyState
  								if ( typeof xhr.status !== "number" ) {
  									complete( 0, "error" );
  								} else {
  									complete(
  
  										// File: protocol always yields status 0; see #8605, #14207
  										xhr.status,
  										xhr.statusText
  									);
  								}
  							} else {
  								complete(
  									xhrSuccessStatus[ xhr.status ] || xhr.status,
  									xhr.statusText,
  
  									// Support: IE <=9 only
  									// IE9 has no XHR2 but throws on binary (trac-11426)
  									// For XHR2 non-text, let the caller handle it (gh-2498)
  									( xhr.responseType || "text" ) !== "text"  ||
  									typeof xhr.responseText !== "string" ?
  										{ binary: xhr.response } :
  										{ text: xhr.responseText },
  									xhr.getAllResponseHeaders()
  								);
  							}
  						}
  					};
  				};
  
  				// Listen to events
  				xhr.onload = callback();
  				errorCallback = xhr.onerror = xhr.ontimeout = callback( "error" );
  
  				// Support: IE 9 only
  				// Use onreadystatechange to replace onabort
  				// to handle uncaught aborts
  				if ( xhr.onabort !== undefined ) {
  					xhr.onabort = errorCallback;
  				} else {
  					xhr.onreadystatechange = function() {
  
  						// Check readyState before timeout as it changes
  						if ( xhr.readyState === 4 ) {
  
  							// Allow onerror to be called first,
  							// but that will not handle a native abort
  							// Also, save errorCallback to a variable
  							// as xhr.onerror cannot be accessed
  							window.setTimeout( function() {
  								if ( callback ) {
  									errorCallback();
  								}
  							} );
  						}
  					};
  				}
  
  				// Create the abort callback
  				callback = callback( "abort" );
  
  				try {
  
  					// Do send the request (this may raise an exception)
  					xhr.send( options.hasContent && options.data || null );
  				} catch ( e ) {
  
  					// #14683: Only rethrow if this hasn't been notified as an error yet
  					if ( callback ) {
  						throw e;
  					}
  				}
  			},
  
  			abort: function() {
  				if ( callback ) {
  					callback();
  				}
  			}
  		};
  	}
  } );
  
  
  
  
  // Prevent auto-execution of scripts when no explicit dataType was provided (See gh-2432)
  jQuery.ajaxPrefilter( function( s ) {
  	if ( s.crossDomain ) {
  		s.contents.script = false;
  	}
  } );
  
  // Install script dataType
  jQuery.ajaxSetup( {
  	accepts: {
  		script: "text/javascript, application/javascript, " +
  			"application/ecmascript, application/x-ecmascript"
  	},
  	contents: {
  		script: /\b(?:java|ecma)script\b/
  	},
  	converters: {
  		"text script": function( text ) {
  			jQuery.globalEval( text );
  			return text;
  		}
  	}
  } );
  
  // Handle cache's special case and crossDomain
  jQuery.ajaxPrefilter( "script", function( s ) {
  	if ( s.cache === undefined ) {
  		s.cache = false;
  	}
  	if ( s.crossDomain ) {
  		s.type = "GET";
  	}
  } );
  
  // Bind script tag hack transport
  jQuery.ajaxTransport( "script", function( s ) {
  
  	// This transport only deals with cross domain requests
  	if ( s.crossDomain ) {
  		var script, callback;
  		return {
  			send: function( _, complete ) {
  				script = jQuery( "<script>" ).prop( {
  					charset: s.scriptCharset,
  					src: s.url
  				} ).on(
  					"load error",
  					callback = function( evt ) {
  						script.remove();
  						callback = null;
  						if ( evt ) {
  							complete( evt.type === "error" ? 404 : 200, evt.type );
  						}
  					}
  				);
  
  				// Use native DOM manipulation to avoid our domManip AJAX trickery
  				document.head.appendChild( script[ 0 ] );
  			},
  			abort: function() {
  				if ( callback ) {
  					callback();
  				}
  			}
  		};
  	}
  } );
  
  
  
  
  var oldCallbacks = [],
  	rjsonp = /(=)\?(?=&|$)|\?\?/;
  
  // Default jsonp settings
  jQuery.ajaxSetup( {
  	jsonp: "callback",
  	jsonpCallback: function() {
  		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
  		this[ callback ] = true;
  		return callback;
  	}
  } );
  
  // Detect, normalize options and install callbacks for jsonp requests
  jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
  
  	var callbackName, overwritten, responseContainer,
  		jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
  			"url" :
  			typeof s.data === "string" &&
  				( s.contentType || "" )
  					.indexOf( "application/x-www-form-urlencoded" ) === 0 &&
  				rjsonp.test( s.data ) && "data"
  		);
  
  	// Handle iff the expected data type is "jsonp" or we have a parameter to set
  	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
  
  		// Get callback name, remembering preexisting value associated with it
  		callbackName = s.jsonpCallback = isFunction( s.jsonpCallback ) ?
  			s.jsonpCallback() :
  			s.jsonpCallback;
  
  		// Insert callback into url or form data
  		if ( jsonProp ) {
  			s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
  		} else if ( s.jsonp !== false ) {
  			s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
  		}
  
  		// Use data converter to retrieve json after script execution
  		s.converters[ "script json" ] = function() {
  			if ( !responseContainer ) {
  				jQuery.error( callbackName + " was not called" );
  			}
  			return responseContainer[ 0 ];
  		};
  
  		// Force json dataType
  		s.dataTypes[ 0 ] = "json";
  
  		// Install callback
  		overwritten = window[ callbackName ];
  		window[ callbackName ] = function() {
  			responseContainer = arguments;
  		};
  
  		// Clean-up function (fires after converters)
  		jqXHR.always( function() {
  
  			// If previous value didn't exist - remove it
  			if ( overwritten === undefined ) {
  				jQuery( window ).removeProp( callbackName );
  
  			// Otherwise restore preexisting value
  			} else {
  				window[ callbackName ] = overwritten;
  			}
  
  			// Save back as free
  			if ( s[ callbackName ] ) {
  
  				// Make sure that re-using the options doesn't screw things around
  				s.jsonpCallback = originalSettings.jsonpCallback;
  
  				// Save the callback name for future use
  				oldCallbacks.push( callbackName );
  			}
  
  			// Call if it was a function and we have a response
  			if ( responseContainer && isFunction( overwritten ) ) {
  				overwritten( responseContainer[ 0 ] );
  			}
  
  			responseContainer = overwritten = undefined;
  		} );
  
  		// Delegate to script
  		return "script";
  	}
  } );
  
  
  
  
  // Support: Safari 8 only
  // In Safari 8 documents created via document.implementation.createHTMLDocument
  // collapse sibling forms: the second one becomes a child of the first one.
  // Because of that, this security measure has to be disabled in Safari 8.
  // https://bugs.webkit.org/show_bug.cgi?id=137337
  support.createHTMLDocument = ( function() {
  	var body = document.implementation.createHTMLDocument( "" ).body;
  	body.innerHTML = "<form></form><form></form>";
  	return body.childNodes.length === 2;
  } )();
  
  
  // Argument "data" should be string of html
  // context (optional): If specified, the fragment will be created in this context,
  // defaults to document
  // keepScripts (optional): If true, will include scripts passed in the html string
  jQuery.parseHTML = function( data, context, keepScripts ) {
  	if ( typeof data !== "string" ) {
  		return [];
  	}
  	if ( typeof context === "boolean" ) {
  		keepScripts = context;
  		context = false;
  	}
  
  	var base, parsed, scripts;
  
  	if ( !context ) {
  
  		// Stop scripts or inline event handlers from being executed immediately
  		// by using document.implementation
  		if ( support.createHTMLDocument ) {
  			context = document.implementation.createHTMLDocument( "" );
  
  			// Set the base href for the created document
  			// so any parsed elements with URLs
  			// are based on the document's URL (gh-2965)
  			base = context.createElement( "base" );
  			base.href = document.location.href;
  			context.head.appendChild( base );
  		} else {
  			context = document;
  		}
  	}
  
  	parsed = rsingleTag.exec( data );
  	scripts = !keepScripts && [];
  
  	// Single tag
  	if ( parsed ) {
  		return [ context.createElement( parsed[ 1 ] ) ];
  	}
  
  	parsed = buildFragment( [ data ], context, scripts );
  
  	if ( scripts && scripts.length ) {
  		jQuery( scripts ).remove();
  	}
  
  	return jQuery.merge( [], parsed.childNodes );
  };
  
  
  /**
   * Load a url into a page
   */
  jQuery.fn.load = function( url, params, callback ) {
  	var selector, type, response,
  		self = this,
  		off = url.indexOf( " " );
  
  	if ( off > -1 ) {
  		selector = stripAndCollapse( url.slice( off ) );
  		url = url.slice( 0, off );
  	}
  
  	// If it's a function
  	if ( isFunction( params ) ) {
  
  		// We assume that it's the callback
  		callback = params;
  		params = undefined;
  
  	// Otherwise, build a param string
  	} else if ( params && typeof params === "object" ) {
  		type = "POST";
  	}
  
  	// If we have elements to modify, make the request
  	if ( self.length > 0 ) {
  		jQuery.ajax( {
  			url: url,
  
  			// If "type" variable is undefined, then "GET" method will be used.
  			// Make value of this field explicit since
  			// user can override it through ajaxSetup method
  			type: type || "GET",
  			dataType: "html",
  			data: params
  		} ).done( function( responseText ) {
  
  			// Save response for use in complete callback
  			response = arguments;
  
  			self.html( selector ?
  
  				// If a selector was specified, locate the right elements in a dummy div
  				// Exclude scripts to avoid IE 'Permission Denied' errors
  				jQuery( "<div>" ).append( jQuery.parseHTML( responseText ) ).find( selector ) :
  
  				// Otherwise use the full result
  				responseText );
  
  		// If the request succeeds, this function gets "data", "status", "jqXHR"
  		// but they are ignored because response was set above.
  		// If it fails, this function gets "jqXHR", "status", "error"
  		} ).always( callback && function( jqXHR, status ) {
  			self.each( function() {
  				callback.apply( this, response || [ jqXHR.responseText, status, jqXHR ] );
  			} );
  		} );
  	}
  
  	return this;
  };
  
  
  
  
  // Attach a bunch of functions for handling common AJAX events
  jQuery.each( [
  	"ajaxStart",
  	"ajaxStop",
  	"ajaxComplete",
  	"ajaxError",
  	"ajaxSuccess",
  	"ajaxSend"
  ], function( i, type ) {
  	jQuery.fn[ type ] = function( fn ) {
  		return this.on( type, fn );
  	};
  } );
  
  
  
  
  jQuery.expr.pseudos.animated = function( elem ) {
  	return jQuery.grep( jQuery.timers, function( fn ) {
  		return elem === fn.elem;
  	} ).length;
  };
  
  
  
  
  jQuery.offset = {
  	setOffset: function( elem, options, i ) {
  		var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
  			position = jQuery.css( elem, "position" ),
  			curElem = jQuery( elem ),
  			props = {};
  
  		// Set position first, in-case top/left are set even on static elem
  		if ( position === "static" ) {
  			elem.style.position = "relative";
  		}
  
  		curOffset = curElem.offset();
  		curCSSTop = jQuery.css( elem, "top" );
  		curCSSLeft = jQuery.css( elem, "left" );
  		calculatePosition = ( position === "absolute" || position === "fixed" ) &&
  			( curCSSTop + curCSSLeft ).indexOf( "auto" ) > -1;
  
  		// Need to be able to calculate position if either
  		// top or left is auto and position is either absolute or fixed
  		if ( calculatePosition ) {
  			curPosition = curElem.position();
  			curTop = curPosition.top;
  			curLeft = curPosition.left;
  
  		} else {
  			curTop = parseFloat( curCSSTop ) || 0;
  			curLeft = parseFloat( curCSSLeft ) || 0;
  		}
  
  		if ( isFunction( options ) ) {
  
  			// Use jQuery.extend here to allow modification of coordinates argument (gh-1848)
  			options = options.call( elem, i, jQuery.extend( {}, curOffset ) );
  		}
  
  		if ( options.top != null ) {
  			props.top = ( options.top - curOffset.top ) + curTop;
  		}
  		if ( options.left != null ) {
  			props.left = ( options.left - curOffset.left ) + curLeft;
  		}
  
  		if ( "using" in options ) {
  			options.using.call( elem, props );
  
  		} else {
  			curElem.css( props );
  		}
  	}
  };
  
  jQuery.fn.extend( {
  
  	// offset() relates an element's border box to the document origin
  	offset: function( options ) {
  
  		// Preserve chaining for setter
  		if ( arguments.length ) {
  			return options === undefined ?
  				this :
  				this.each( function( i ) {
  					jQuery.offset.setOffset( this, options, i );
  				} );
  		}
  
  		var rect, win,
  			elem = this[ 0 ];
  
  		if ( !elem ) {
  			return;
  		}
  
  		// Return zeros for disconnected and hidden (display: none) elements (gh-2310)
  		// Support: IE <=11 only
  		// Running getBoundingClientRect on a
  		// disconnected node in IE throws an error
  		if ( !elem.getClientRects().length ) {
  			return { top: 0, left: 0 };
  		}
  
  		// Get document-relative position by adding viewport scroll to viewport-relative gBCR
  		rect = elem.getBoundingClientRect();
  		win = elem.ownerDocument.defaultView;
  		return {
  			top: rect.top + win.pageYOffset,
  			left: rect.left + win.pageXOffset
  		};
  	},
  
  	// position() relates an element's margin box to its offset parent's padding box
  	// This corresponds to the behavior of CSS absolute positioning
  	position: function() {
  		if ( !this[ 0 ] ) {
  			return;
  		}
  
  		var offsetParent, offset, doc,
  			elem = this[ 0 ],
  			parentOffset = { top: 0, left: 0 };
  
  		// position:fixed elements are offset from the viewport, which itself always has zero offset
  		if ( jQuery.css( elem, "position" ) === "fixed" ) {
  
  			// Assume position:fixed implies availability of getBoundingClientRect
  			offset = elem.getBoundingClientRect();
  
  		} else {
  			offset = this.offset();
  
  			// Account for the *real* offset parent, which can be the document or its root element
  			// when a statically positioned element is identified
  			doc = elem.ownerDocument;
  			offsetParent = elem.offsetParent || doc.documentElement;
  			while ( offsetParent &&
  				( offsetParent === doc.body || offsetParent === doc.documentElement ) &&
  				jQuery.css( offsetParent, "position" ) === "static" ) {
  
  				offsetParent = offsetParent.parentNode;
  			}
  			if ( offsetParent && offsetParent !== elem && offsetParent.nodeType === 1 ) {
  
  				// Incorporate borders into its offset, since they are outside its content origin
  				parentOffset = jQuery( offsetParent ).offset();
  				parentOffset.top += jQuery.css( offsetParent, "borderTopWidth", true );
  				parentOffset.left += jQuery.css( offsetParent, "borderLeftWidth", true );
  			}
  		}
  
  		// Subtract parent offsets and element margins
  		return {
  			top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
  			left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
  		};
  	},
  
  	// This method will return documentElement in the following cases:
  	// 1) For the element inside the iframe without offsetParent, this method will return
  	//    documentElement of the parent window
  	// 2) For the hidden or detached element
  	// 3) For body or html element, i.e. in case of the html node - it will return itself
  	//
  	// but those exceptions were never presented as a real life use-cases
  	// and might be considered as more preferable results.
  	//
  	// This logic, however, is not guaranteed and can change at any point in the future
  	offsetParent: function() {
  		return this.map( function() {
  			var offsetParent = this.offsetParent;
  
  			while ( offsetParent && jQuery.css( offsetParent, "position" ) === "static" ) {
  				offsetParent = offsetParent.offsetParent;
  			}
  
  			return offsetParent || documentElement;
  		} );
  	}
  } );
  
  // Create scrollLeft and scrollTop methods
  jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
  	var top = "pageYOffset" === prop;
  
  	jQuery.fn[ method ] = function( val ) {
  		return access( this, function( elem, method, val ) {
  
  			// Coalesce documents and windows
  			var win;
  			if ( isWindow( elem ) ) {
  				win = elem;
  			} else if ( elem.nodeType === 9 ) {
  				win = elem.defaultView;
  			}
  
  			if ( val === undefined ) {
  				return win ? win[ prop ] : elem[ method ];
  			}
  
  			if ( win ) {
  				win.scrollTo(
  					!top ? val : win.pageXOffset,
  					top ? val : win.pageYOffset
  				);
  
  			} else {
  				elem[ method ] = val;
  			}
  		}, method, val, arguments.length );
  	};
  } );
  
  // Support: Safari <=7 - 9.1, Chrome <=37 - 49
  // Add the top/left cssHooks using jQuery.fn.position
  // Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
  // Blink bug: https://bugs.chromium.org/p/chromium/issues/detail?id=589347
  // getComputedStyle returns percent when specified for top/left/bottom/right;
  // rather than make the css module depend on the offset module, just check for it here
  jQuery.each( [ "top", "left" ], function( i, prop ) {
  	jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
  		function( elem, computed ) {
  			if ( computed ) {
  				computed = curCSS( elem, prop );
  
  				// If curCSS returns percentage, fallback to offset
  				return rnumnonpx.test( computed ) ?
  					jQuery( elem ).position()[ prop ] + "px" :
  					computed;
  			}
  		}
  	);
  } );
  
  
  // Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
  jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
  	jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name },
  		function( defaultExtra, funcName ) {
  
  		// Margin is only for outerHeight, outerWidth
  		jQuery.fn[ funcName ] = function( margin, value ) {
  			var chainable = arguments.length && ( defaultExtra || typeof margin !== "boolean" ),
  				extra = defaultExtra || ( margin === true || value === true ? "margin" : "border" );
  
  			return access( this, function( elem, type, value ) {
  				var doc;
  
  				if ( isWindow( elem ) ) {
  
  					// $( window ).outerWidth/Height return w/h including scrollbars (gh-1729)
  					return funcName.indexOf( "outer" ) === 0 ?
  						elem[ "inner" + name ] :
  						elem.document.documentElement[ "client" + name ];
  				}
  
  				// Get document width or height
  				if ( elem.nodeType === 9 ) {
  					doc = elem.documentElement;
  
  					// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height],
  					// whichever is greatest
  					return Math.max(
  						elem.body[ "scroll" + name ], doc[ "scroll" + name ],
  						elem.body[ "offset" + name ], doc[ "offset" + name ],
  						doc[ "client" + name ]
  					);
  				}
  
  				return value === undefined ?
  
  					// Get width or height on the element, requesting but not forcing parseFloat
  					jQuery.css( elem, type, extra ) :
  
  					// Set width or height on the element
  					jQuery.style( elem, type, value, extra );
  			}, type, chainable ? margin : undefined, chainable );
  		};
  	} );
  } );
  
  
  jQuery.each( ( "blur focus focusin focusout resize scroll click dblclick " +
  	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
  	"change select submit keydown keypress keyup contextmenu" ).split( " " ),
  	function( i, name ) {
  
  	// Handle event binding
  	jQuery.fn[ name ] = function( data, fn ) {
  		return arguments.length > 0 ?
  			this.on( name, null, data, fn ) :
  			this.trigger( name );
  	};
  } );
  
  jQuery.fn.extend( {
  	hover: function( fnOver, fnOut ) {
  		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
  	}
  } );
  
  
  
  
  jQuery.fn.extend( {
  
  	bind: function( types, data, fn ) {
  		return this.on( types, null, data, fn );
  	},
  	unbind: function( types, fn ) {
  		return this.off( types, null, fn );
  	},
  
  	delegate: function( selector, types, data, fn ) {
  		return this.on( types, selector, data, fn );
  	},
  	undelegate: function( selector, types, fn ) {
  
  		// ( namespace ) or ( selector, types [, fn] )
  		return arguments.length === 1 ?
  			this.off( selector, "**" ) :
  			this.off( types, selector || "**", fn );
  	}
  } );
  
  // Bind a function to a context, optionally partially applying any
  // arguments.
  // jQuery.proxy is deprecated to promote standards (specifically Function#bind)
  // However, it is not slated for removal any time soon
  jQuery.proxy = function( fn, context ) {
  	var tmp, args, proxy;
  
  	if ( typeof context === "string" ) {
  		tmp = fn[ context ];
  		context = fn;
  		fn = tmp;
  	}
  
  	// Quick check to determine if target is callable, in the spec
  	// this throws a TypeError, but we will just return undefined.
  	if ( !isFunction( fn ) ) {
  		return undefined;
  	}
  
  	// Simulated bind
  	args = slice.call( arguments, 2 );
  	proxy = function() {
  		return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
  	};
  
  	// Set the guid of unique handler to the same of original handler, so it can be removed
  	proxy.guid = fn.guid = fn.guid || jQuery.guid++;
  
  	return proxy;
  };
  
  jQuery.holdReady = function( hold ) {
  	if ( hold ) {
  		jQuery.readyWait++;
  	} else {
  		jQuery.ready( true );
  	}
  };
  jQuery.isArray = Array.isArray;
  jQuery.parseJSON = JSON.parse;
  jQuery.nodeName = nodeName;
  jQuery.isFunction = isFunction;
  jQuery.isWindow = isWindow;
  jQuery.camelCase = camelCase;
  jQuery.type = toType;
  
  jQuery.now = Date.now;
  
  jQuery.isNumeric = function( obj ) {
  
  	// As of jQuery 3.0, isNumeric is limited to
  	// strings and numbers (primitives or objects)
  	// that can be coerced to finite numbers (gh-2662)
  	var type = jQuery.type( obj );
  	return ( type === "number" || type === "string" ) &&
  
  		// parseFloat NaNs numeric-cast false positives ("")
  		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
  		// subtraction forces infinities to NaN
  		!isNaN( obj - parseFloat( obj ) );
  };
  
  
  
  
  // Register as a named AMD module, since jQuery can be concatenated with other
  // files that may use define, but not via a proper concatenation script that
  // understands anonymous AMD modules. A named AMD is safest and most robust
  // way to register. Lowercase jquery is used because AMD module names are
  // derived from file names, and jQuery is normally delivered in a lowercase
  // file name. Do this after creating the global so that if an AMD module wants
  // to call noConflict to hide this version of jQuery, it will work.
  
  // Note that for maximum portability, libraries that are not jQuery should
  // declare themselves as anonymous modules, and avoid setting a global if an
  // AMD loader is present. jQuery is a special case. For more information, see
  // https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon
  
  if ( true ) {
  	!(__WEBPACK_AMD_DEFINE_ARRAY__ = [], __WEBPACK_AMD_DEFINE_RESULT__ = (function() {
  		return jQuery;
  	}).apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__),
  				__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
  }
  
  
  
  
  var
  
  	// Map over jQuery in case of overwrite
  	_jQuery = window.jQuery,
  
  	// Map over the $ in case of overwrite
  	_$ = window.$;
  
  jQuery.noConflict = function( deep ) {
  	if ( window.$ === jQuery ) {
  		window.$ = _$;
  	}
  
  	if ( deep && window.jQuery === jQuery ) {
  		window.jQuery = _jQuery;
  	}
  
  	return jQuery;
  };
  
  // Expose jQuery and $ identifiers, even in AMD
  // (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
  // and CommonJS for browser emulators (#13566)
  if ( !noGlobal ) {
  	window.jQuery = window.$ = jQuery;
  }
  
  
  
  
  return jQuery;
  } );
  
  
  /***/ }),
  
  /***/ "./node_modules/lodash/lodash.js":
  /*!***************************************!*\
    !*** ./node_modules/lodash/lodash.js ***!
    \***************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  /* WEBPACK VAR INJECTION */(function(global, module) {var __WEBPACK_AMD_DEFINE_RESULT__;/**
   * @license
   * Lodash <https://lodash.com/>
   * Copyright JS Foundation and other contributors <https://js.foundation/>
   * Released under MIT license <https://lodash.com/license>
   * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
   * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
   */
  ;(function() {
  
    /** Used as a safe reference for `undefined` in pre-ES5 environments. */
    var undefined;
  
    /** Used as the semantic version number. */
    var VERSION = '4.17.11';
  
    /** Used as the size to enable large array optimizations. */
    var LARGE_ARRAY_SIZE = 200;
  
    /** Error message constants. */
    var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
        FUNC_ERROR_TEXT = 'Expected a function';
  
    /** Used to stand-in for `undefined` hash values. */
    var HASH_UNDEFINED = '__lodash_hash_undefined__';
  
    /** Used as the maximum memoize cache size. */
    var MAX_MEMOIZE_SIZE = 500;
  
    /** Used as the internal argument placeholder. */
    var PLACEHOLDER = '__lodash_placeholder__';
  
    /** Used to compose bitmasks for cloning. */
    var CLONE_DEEP_FLAG = 1,
        CLONE_FLAT_FLAG = 2,
        CLONE_SYMBOLS_FLAG = 4;
  
    /** Used to compose bitmasks for value comparisons. */
    var COMPARE_PARTIAL_FLAG = 1,
        COMPARE_UNORDERED_FLAG = 2;
  
    /** Used to compose bitmasks for function metadata. */
    var WRAP_BIND_FLAG = 1,
        WRAP_BIND_KEY_FLAG = 2,
        WRAP_CURRY_BOUND_FLAG = 4,
        WRAP_CURRY_FLAG = 8,
        WRAP_CURRY_RIGHT_FLAG = 16,
        WRAP_PARTIAL_FLAG = 32,
        WRAP_PARTIAL_RIGHT_FLAG = 64,
        WRAP_ARY_FLAG = 128,
        WRAP_REARG_FLAG = 256,
        WRAP_FLIP_FLAG = 512;
  
    /** Used as default options for `_.truncate`. */
    var DEFAULT_TRUNC_LENGTH = 30,
        DEFAULT_TRUNC_OMISSION = '...';
  
    /** Used to detect hot functions by number of calls within a span of milliseconds. */
    var HOT_COUNT = 800,
        HOT_SPAN = 16;
  
    /** Used to indicate the type of lazy iteratees. */
    var LAZY_FILTER_FLAG = 1,
        LAZY_MAP_FLAG = 2,
        LAZY_WHILE_FLAG = 3;
  
    /** Used as references for various `Number` constants. */
    var INFINITY = 1 / 0,
        MAX_SAFE_INTEGER = 9007199254740991,
        MAX_INTEGER = 1.7976931348623157e+308,
        NAN = 0 / 0;
  
    /** Used as references for the maximum length and index of an array. */
    var MAX_ARRAY_LENGTH = 4294967295,
        MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
        HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
  
    /** Used to associate wrap methods with their bit flags. */
    var wrapFlags = [
      ['ary', WRAP_ARY_FLAG],
      ['bind', WRAP_BIND_FLAG],
      ['bindKey', WRAP_BIND_KEY_FLAG],
      ['curry', WRAP_CURRY_FLAG],
      ['curryRight', WRAP_CURRY_RIGHT_FLAG],
      ['flip', WRAP_FLIP_FLAG],
      ['partial', WRAP_PARTIAL_FLAG],
      ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
      ['rearg', WRAP_REARG_FLAG]
    ];
  
    /** `Object#toString` result references. */
    var argsTag = '[object Arguments]',
        arrayTag = '[object Array]',
        asyncTag = '[object AsyncFunction]',
        boolTag = '[object Boolean]',
        dateTag = '[object Date]',
        domExcTag = '[object DOMException]',
        errorTag = '[object Error]',
        funcTag = '[object Function]',
        genTag = '[object GeneratorFunction]',
        mapTag = '[object Map]',
        numberTag = '[object Number]',
        nullTag = '[object Null]',
        objectTag = '[object Object]',
        promiseTag = '[object Promise]',
        proxyTag = '[object Proxy]',
        regexpTag = '[object RegExp]',
        setTag = '[object Set]',
        stringTag = '[object String]',
        symbolTag = '[object Symbol]',
        undefinedTag = '[object Undefined]',
        weakMapTag = '[object WeakMap]',
        weakSetTag = '[object WeakSet]';
  
    var arrayBufferTag = '[object ArrayBuffer]',
        dataViewTag = '[object DataView]',
        float32Tag = '[object Float32Array]',
        float64Tag = '[object Float64Array]',
        int8Tag = '[object Int8Array]',
        int16Tag = '[object Int16Array]',
        int32Tag = '[object Int32Array]',
        uint8Tag = '[object Uint8Array]',
        uint8ClampedTag = '[object Uint8ClampedArray]',
        uint16Tag = '[object Uint16Array]',
        uint32Tag = '[object Uint32Array]';
  
    /** Used to match empty string literals in compiled template source. */
    var reEmptyStringLeading = /\b__p \+= '';/g,
        reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
        reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
  
    /** Used to match HTML entities and HTML characters. */
    var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
        reUnescapedHtml = /[&<>"']/g,
        reHasEscapedHtml = RegExp(reEscapedHtml.source),
        reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
  
    /** Used to match template delimiters. */
    var reEscape = /<%-([\s\S]+?)%>/g,
        reEvaluate = /<%([\s\S]+?)%>/g,
        reInterpolate = /<%=([\s\S]+?)%>/g;
  
    /** Used to match property names within property paths. */
    var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
        reIsPlainProp = /^\w*$/,
        rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
  
    /**
     * Used to match `RegExp`
     * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
     */
    var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
        reHasRegExpChar = RegExp(reRegExpChar.source);
  
    /** Used to match leading and trailing whitespace. */
    var reTrim = /^\s+|\s+$/g,
        reTrimStart = /^\s+/,
        reTrimEnd = /\s+$/;
  
    /** Used to match wrap detail comments. */
    var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
        reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
        reSplitDetails = /,? & /;
  
    /** Used to match words composed of alphanumeric characters. */
    var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
  
    /** Used to match backslashes in property paths. */
    var reEscapeChar = /\\(\\)?/g;
  
    /**
     * Used to match
     * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
     */
    var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
  
    /** Used to match `RegExp` flags from their coerced string values. */
    var reFlags = /\w*$/;
  
    /** Used to detect bad signed hexadecimal string values. */
    var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
  
    /** Used to detect binary string values. */
    var reIsBinary = /^0b[01]+$/i;
  
    /** Used to detect host constructors (Safari). */
    var reIsHostCtor = /^\[object .+?Constructor\]$/;
  
    /** Used to detect octal string values. */
    var reIsOctal = /^0o[0-7]+$/i;
  
    /** Used to detect unsigned integer values. */
    var reIsUint = /^(?:0|[1-9]\d*)$/;
  
    /** Used to match Latin Unicode letters (excluding mathematical operators). */
    var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
  
    /** Used to ensure capturing order of template delimiters. */
    var reNoMatch = /($^)/;
  
    /** Used to match unescaped characters in compiled string literals. */
    var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
  
    /** Used to compose unicode character classes. */
    var rsAstralRange = '\\ud800-\\udfff',
        rsComboMarksRange = '\\u0300-\\u036f',
        reComboHalfMarksRange = '\\ufe20-\\ufe2f',
        rsComboSymbolsRange = '\\u20d0-\\u20ff',
        rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
        rsDingbatRange = '\\u2700-\\u27bf',
        rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
        rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
        rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
        rsPunctuationRange = '\\u2000-\\u206f',
        rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
        rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
        rsVarRange = '\\ufe0e\\ufe0f',
        rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
  
    /** Used to compose unicode capture groups. */
    var rsApos = "['\u2019]",
        rsAstral = '[' + rsAstralRange + ']',
        rsBreak = '[' + rsBreakRange + ']',
        rsCombo = '[' + rsComboRange + ']',
        rsDigits = '\\d+',
        rsDingbat = '[' + rsDingbatRange + ']',
        rsLower = '[' + rsLowerRange + ']',
        rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
        rsFitz = '\\ud83c[\\udffb-\\udfff]',
        rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
        rsNonAstral = '[^' + rsAstralRange + ']',
        rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
        rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
        rsUpper = '[' + rsUpperRange + ']',
        rsZWJ = '\\u200d';
  
    /** Used to compose unicode regexes. */
    var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
        rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
        rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
        rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
        reOptMod = rsModifier + '?',
        rsOptVar = '[' + rsVarRange + ']?',
        rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
        rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
        rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
        rsSeq = rsOptVar + reOptMod + rsOptJoin,
        rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
        rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
  
    /** Used to match apostrophes. */
    var reApos = RegExp(rsApos, 'g');
  
    /**
     * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
     * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
     */
    var reComboMark = RegExp(rsCombo, 'g');
  
    /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
    var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
  
    /** Used to match complex or compound words. */
    var reUnicodeWord = RegExp([
      rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
      rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
      rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
      rsUpper + '+' + rsOptContrUpper,
      rsOrdUpper,
      rsOrdLower,
      rsDigits,
      rsEmoji
    ].join('|'), 'g');
  
    /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
    var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboRange + rsVarRange + ']');
  
    /** Used to detect strings that need a more robust regexp to match words. */
    var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
  
    /** Used to assign default `context` object properties. */
    var contextProps = [
      'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
      'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
      'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
      'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
      '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
    ];
  
    /** Used to make template sourceURLs easier to identify. */
    var templateCounter = -1;
  
    /** Used to identify `toStringTag` values of typed arrays. */
    var typedArrayTags = {};
    typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
    typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
    typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
    typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
    typedArrayTags[uint32Tag] = true;
    typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
    typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
    typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
    typedArrayTags[errorTag] = typedArrayTags[funcTag] =
    typedArrayTags[mapTag] = typedArrayTags[numberTag] =
    typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
    typedArrayTags[setTag] = typedArrayTags[stringTag] =
    typedArrayTags[weakMapTag] = false;
  
    /** Used to identify `toStringTag` values supported by `_.clone`. */
    var cloneableTags = {};
    cloneableTags[argsTag] = cloneableTags[arrayTag] =
    cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
    cloneableTags[boolTag] = cloneableTags[dateTag] =
    cloneableTags[float32Tag] = cloneableTags[float64Tag] =
    cloneableTags[int8Tag] = cloneableTags[int16Tag] =
    cloneableTags[int32Tag] = cloneableTags[mapTag] =
    cloneableTags[numberTag] = cloneableTags[objectTag] =
    cloneableTags[regexpTag] = cloneableTags[setTag] =
    cloneableTags[stringTag] = cloneableTags[symbolTag] =
    cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
    cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
    cloneableTags[errorTag] = cloneableTags[funcTag] =
    cloneableTags[weakMapTag] = false;
  
    /** Used to map Latin Unicode letters to basic Latin letters. */
    var deburredLetters = {
      // Latin-1 Supplement block.
      '\xc0': 'A',  '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
      '\xe0': 'a',  '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
      '\xc7': 'C',  '\xe7': 'c',
      '\xd0': 'D',  '\xf0': 'd',
      '\xc8': 'E',  '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
      '\xe8': 'e',  '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
      '\xcc': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
      '\xec': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
      '\xd1': 'N',  '\xf1': 'n',
      '\xd2': 'O',  '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
      '\xf2': 'o',  '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
      '\xd9': 'U',  '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
      '\xf9': 'u',  '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
      '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
      '\xc6': 'Ae', '\xe6': 'ae',
      '\xde': 'Th', '\xfe': 'th',
      '\xdf': 'ss',
      // Latin Extended-A block.
      '\u0100': 'A',  '\u0102': 'A', '\u0104': 'A',
      '\u0101': 'a',  '\u0103': 'a', '\u0105': 'a',
      '\u0106': 'C',  '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
      '\u0107': 'c',  '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
      '\u010e': 'D',  '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
      '\u0112': 'E',  '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
      '\u0113': 'e',  '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
      '\u011c': 'G',  '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
      '\u011d': 'g',  '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
      '\u0124': 'H',  '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
      '\u0128': 'I',  '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
      '\u0129': 'i',  '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
      '\u0134': 'J',  '\u0135': 'j',
      '\u0136': 'K',  '\u0137': 'k', '\u0138': 'k',
      '\u0139': 'L',  '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
      '\u013a': 'l',  '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
      '\u0143': 'N',  '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
      '\u0144': 'n',  '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
      '\u014c': 'O',  '\u014e': 'O', '\u0150': 'O',
      '\u014d': 'o',  '\u014f': 'o', '\u0151': 'o',
      '\u0154': 'R',  '\u0156': 'R', '\u0158': 'R',
      '\u0155': 'r',  '\u0157': 'r', '\u0159': 'r',
      '\u015a': 'S',  '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
      '\u015b': 's',  '\u015d': 's', '\u015f': 's', '\u0161': 's',
      '\u0162': 'T',  '\u0164': 'T', '\u0166': 'T',
      '\u0163': 't',  '\u0165': 't', '\u0167': 't',
      '\u0168': 'U',  '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
      '\u0169': 'u',  '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
      '\u0174': 'W',  '\u0175': 'w',
      '\u0176': 'Y',  '\u0177': 'y', '\u0178': 'Y',
      '\u0179': 'Z',  '\u017b': 'Z', '\u017d': 'Z',
      '\u017a': 'z',  '\u017c': 'z', '\u017e': 'z',
      '\u0132': 'IJ', '\u0133': 'ij',
      '\u0152': 'Oe', '\u0153': 'oe',
      '\u0149': "'n", '\u017f': 's'
    };
  
    /** Used to map characters to HTML entities. */
    var htmlEscapes = {
      '&': '&amp;',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#39;'
    };
  
    /** Used to map HTML entities to characters. */
    var htmlUnescapes = {
      '&amp;': '&',
      '&lt;': '<',
      '&gt;': '>',
      '&quot;': '"',
      '&#39;': "'"
    };
  
    /** Used to escape characters for inclusion in compiled string literals. */
    var stringEscapes = {
      '\\': '\\',
      "'": "'",
      '\n': 'n',
      '\r': 'r',
      '\u2028': 'u2028',
      '\u2029': 'u2029'
    };
  
    /** Built-in method references without a dependency on `root`. */
    var freeParseFloat = parseFloat,
        freeParseInt = parseInt;
  
    /** Detect free variable `global` from Node.js. */
    var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
  
    /** Detect free variable `self`. */
    var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
  
    /** Used as a reference to the global object. */
    var root = freeGlobal || freeSelf || Function('return this')();
  
    /** Detect free variable `exports`. */
    var freeExports =  true && exports && !exports.nodeType && exports;
  
    /** Detect free variable `module`. */
    var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
  
    /** Detect the popular CommonJS extension `module.exports`. */
    var moduleExports = freeModule && freeModule.exports === freeExports;
  
    /** Detect free variable `process` from Node.js. */
    var freeProcess = moduleExports && freeGlobal.process;
  
    /** Used to access faster Node.js helpers. */
    var nodeUtil = (function() {
      try {
        // Use `util.types` for Node.js 10+.
        var types = freeModule && freeModule.require && freeModule.require('util').types;
  
        if (types) {
          return types;
        }
  
        // Legacy `process.binding('util')` for Node.js < 10.
        return freeProcess && freeProcess.binding && freeProcess.binding('util');
      } catch (e) {}
    }());
  
    /* Node.js helper references. */
    var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
        nodeIsDate = nodeUtil && nodeUtil.isDate,
        nodeIsMap = nodeUtil && nodeUtil.isMap,
        nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
        nodeIsSet = nodeUtil && nodeUtil.isSet,
        nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
  
    /*--------------------------------------------------------------------------*/
  
    /**
     * A faster alternative to `Function#apply`, this function invokes `func`
     * with the `this` binding of `thisArg` and the arguments of `args`.
     *
     * @private
     * @param {Function} func The function to invoke.
     * @param {*} thisArg The `this` binding of `func`.
     * @param {Array} args The arguments to invoke `func` with.
     * @returns {*} Returns the result of `func`.
     */
    function apply(func, thisArg, args) {
      switch (args.length) {
        case 0: return func.call(thisArg);
        case 1: return func.call(thisArg, args[0]);
        case 2: return func.call(thisArg, args[0], args[1]);
        case 3: return func.call(thisArg, args[0], args[1], args[2]);
      }
      return func.apply(thisArg, args);
    }
  
    /**
     * A specialized version of `baseAggregator` for arrays.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} setter The function to set `accumulator` values.
     * @param {Function} iteratee The iteratee to transform keys.
     * @param {Object} accumulator The initial aggregated object.
     * @returns {Function} Returns `accumulator`.
     */
    function arrayAggregator(array, setter, iteratee, accumulator) {
      var index = -1,
          length = array == null ? 0 : array.length;
  
      while (++index < length) {
        var value = array[index];
        setter(accumulator, value, iteratee(value), array);
      }
      return accumulator;
    }
  
    /**
     * A specialized version of `_.forEach` for arrays without support for
     * iteratee shorthands.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns `array`.
     */
    function arrayEach(array, iteratee) {
      var index = -1,
          length = array == null ? 0 : array.length;
  
      while (++index < length) {
        if (iteratee(array[index], index, array) === false) {
          break;
        }
      }
      return array;
    }
  
    /**
     * A specialized version of `_.forEachRight` for arrays without support for
     * iteratee shorthands.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns `array`.
     */
    function arrayEachRight(array, iteratee) {
      var length = array == null ? 0 : array.length;
  
      while (length--) {
        if (iteratee(array[length], length, array) === false) {
          break;
        }
      }
      return array;
    }
  
    /**
     * A specialized version of `_.every` for arrays without support for
     * iteratee shorthands.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if all elements pass the predicate check,
     *  else `false`.
     */
    function arrayEvery(array, predicate) {
      var index = -1,
          length = array == null ? 0 : array.length;
  
      while (++index < length) {
        if (!predicate(array[index], index, array)) {
          return false;
        }
      }
      return true;
    }
  
    /**
     * A specialized version of `_.filter` for arrays without support for
     * iteratee shorthands.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     */
    function arrayFilter(array, predicate) {
      var index = -1,
          length = array == null ? 0 : array.length,
          resIndex = 0,
          result = [];
  
      while (++index < length) {
        var value = array[index];
        if (predicate(value, index, array)) {
          result[resIndex++] = value;
        }
      }
      return result;
    }
  
    /**
     * A specialized version of `_.includes` for arrays without support for
     * specifying an index to search from.
     *
     * @private
     * @param {Array} [array] The array to inspect.
     * @param {*} target The value to search for.
     * @returns {boolean} Returns `true` if `target` is found, else `false`.
     */
    function arrayIncludes(array, value) {
      var length = array == null ? 0 : array.length;
      return !!length && baseIndexOf(array, value, 0) > -1;
    }
  
    /**
     * This function is like `arrayIncludes` except that it accepts a comparator.
     *
     * @private
     * @param {Array} [array] The array to inspect.
     * @param {*} target The value to search for.
     * @param {Function} comparator The comparator invoked per element.
     * @returns {boolean} Returns `true` if `target` is found, else `false`.
     */
    function arrayIncludesWith(array, value, comparator) {
      var index = -1,
          length = array == null ? 0 : array.length;
  
      while (++index < length) {
        if (comparator(value, array[index])) {
          return true;
        }
      }
      return false;
    }
  
    /**
     * A specialized version of `_.map` for arrays without support for iteratee
     * shorthands.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns the new mapped array.
     */
    function arrayMap(array, iteratee) {
      var index = -1,
          length = array == null ? 0 : array.length,
          result = Array(length);
  
      while (++index < length) {
        result[index] = iteratee(array[index], index, array);
      }
      return result;
    }
  
    /**
     * Appends the elements of `values` to `array`.
     *
     * @private
     * @param {Array} array The array to modify.
     * @param {Array} values The values to append.
     * @returns {Array} Returns `array`.
     */
    function arrayPush(array, values) {
      var index = -1,
          length = values.length,
          offset = array.length;
  
      while (++index < length) {
        array[offset + index] = values[index];
      }
      return array;
    }
  
    /**
     * A specialized version of `_.reduce` for arrays without support for
     * iteratee shorthands.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @param {boolean} [initAccum] Specify using the first element of `array` as
     *  the initial value.
     * @returns {*} Returns the accumulated value.
     */
    function arrayReduce(array, iteratee, accumulator, initAccum) {
      var index = -1,
          length = array == null ? 0 : array.length;
  
      if (initAccum && length) {
        accumulator = array[++index];
      }
      while (++index < length) {
        accumulator = iteratee(accumulator, array[index], index, array);
      }
      return accumulator;
    }
  
    /**
     * A specialized version of `_.reduceRight` for arrays without support for
     * iteratee shorthands.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @param {boolean} [initAccum] Specify using the last element of `array` as
     *  the initial value.
     * @returns {*} Returns the accumulated value.
     */
    function arrayReduceRight(array, iteratee, accumulator, initAccum) {
      var length = array == null ? 0 : array.length;
      if (initAccum && length) {
        accumulator = array[--length];
      }
      while (length--) {
        accumulator = iteratee(accumulator, array[length], length, array);
      }
      return accumulator;
    }
  
    /**
     * A specialized version of `_.some` for arrays without support for iteratee
     * shorthands.
     *
     * @private
     * @param {Array} [array] The array to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if any element passes the predicate check,
     *  else `false`.
     */
    function arraySome(array, predicate) {
      var index = -1,
          length = array == null ? 0 : array.length;
  
      while (++index < length) {
        if (predicate(array[index], index, array)) {
          return true;
        }
      }
      return false;
    }
  
    /**
     * Gets the size of an ASCII `string`.
     *
     * @private
     * @param {string} string The string inspect.
     * @returns {number} Returns the string size.
     */
    var asciiSize = baseProperty('length');
  
    /**
     * Converts an ASCII `string` to an array.
     *
     * @private
     * @param {string} string The string to convert.
     * @returns {Array} Returns the converted array.
     */
    function asciiToArray(string) {
      return string.split('');
    }
  
    /**
     * Splits an ASCII `string` into an array of its words.
     *
     * @private
     * @param {string} The string to inspect.
     * @returns {Array} Returns the words of `string`.
     */
    function asciiWords(string) {
      return string.match(reAsciiWord) || [];
    }
  
    /**
     * The base implementation of methods like `_.findKey` and `_.findLastKey`,
     * without support for iteratee shorthands, which iterates over `collection`
     * using `eachFunc`.
     *
     * @private
     * @param {Array|Object} collection The collection to inspect.
     * @param {Function} predicate The function invoked per iteration.
     * @param {Function} eachFunc The function to iterate over `collection`.
     * @returns {*} Returns the found element or its key, else `undefined`.
     */
    function baseFindKey(collection, predicate, eachFunc) {
      var result;
      eachFunc(collection, function(value, key, collection) {
        if (predicate(value, key, collection)) {
          result = key;
          return false;
        }
      });
      return result;
    }
  
    /**
     * The base implementation of `_.findIndex` and `_.findLastIndex` without
     * support for iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Function} predicate The function invoked per iteration.
     * @param {number} fromIndex The index to search from.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {number} Returns the index of the matched value, else `-1`.
     */
    function baseFindIndex(array, predicate, fromIndex, fromRight) {
      var length = array.length,
          index = fromIndex + (fromRight ? 1 : -1);
  
      while ((fromRight ? index-- : ++index < length)) {
        if (predicate(array[index], index, array)) {
          return index;
        }
      }
      return -1;
    }
  
    /**
     * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @param {number} fromIndex The index to search from.
     * @returns {number} Returns the index of the matched value, else `-1`.
     */
    function baseIndexOf(array, value, fromIndex) {
      return value === value
        ? strictIndexOf(array, value, fromIndex)
        : baseFindIndex(array, baseIsNaN, fromIndex);
    }
  
    /**
     * This function is like `baseIndexOf` except that it accepts a comparator.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @param {number} fromIndex The index to search from.
     * @param {Function} comparator The comparator invoked per element.
     * @returns {number} Returns the index of the matched value, else `-1`.
     */
    function baseIndexOfWith(array, value, fromIndex, comparator) {
      var index = fromIndex - 1,
          length = array.length;
  
      while (++index < length) {
        if (comparator(array[index], value)) {
          return index;
        }
      }
      return -1;
    }
  
    /**
     * The base implementation of `_.isNaN` without support for number objects.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
     */
    function baseIsNaN(value) {
      return value !== value;
    }
  
    /**
     * The base implementation of `_.mean` and `_.meanBy` without support for
     * iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {number} Returns the mean.
     */
    function baseMean(array, iteratee) {
      var length = array == null ? 0 : array.length;
      return length ? (baseSum(array, iteratee) / length) : NAN;
    }
  
    /**
     * The base implementation of `_.property` without support for deep paths.
     *
     * @private
     * @param {string} key The key of the property to get.
     * @returns {Function} Returns the new accessor function.
     */
    function baseProperty(key) {
      return function(object) {
        return object == null ? undefined : object[key];
      };
    }
  
    /**
     * The base implementation of `_.propertyOf` without support for deep paths.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Function} Returns the new accessor function.
     */
    function basePropertyOf(object) {
      return function(key) {
        return object == null ? undefined : object[key];
      };
    }
  
    /**
     * The base implementation of `_.reduce` and `_.reduceRight`, without support
     * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {*} accumulator The initial value.
     * @param {boolean} initAccum Specify using the first or last element of
     *  `collection` as the initial value.
     * @param {Function} eachFunc The function to iterate over `collection`.
     * @returns {*} Returns the accumulated value.
     */
    function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
      eachFunc(collection, function(value, index, collection) {
        accumulator = initAccum
          ? (initAccum = false, value)
          : iteratee(accumulator, value, index, collection);
      });
      return accumulator;
    }
  
    /**
     * The base implementation of `_.sortBy` which uses `comparer` to define the
     * sort order of `array` and replaces criteria objects with their corresponding
     * values.
     *
     * @private
     * @param {Array} array The array to sort.
     * @param {Function} comparer The function to define sort order.
     * @returns {Array} Returns `array`.
     */
    function baseSortBy(array, comparer) {
      var length = array.length;
  
      array.sort(comparer);
      while (length--) {
        array[length] = array[length].value;
      }
      return array;
    }
  
    /**
     * The base implementation of `_.sum` and `_.sumBy` without support for
     * iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {number} Returns the sum.
     */
    function baseSum(array, iteratee) {
      var result,
          index = -1,
          length = array.length;
  
      while (++index < length) {
        var current = iteratee(array[index]);
        if (current !== undefined) {
          result = result === undefined ? current : (result + current);
        }
      }
      return result;
    }
  
    /**
     * The base implementation of `_.times` without support for iteratee shorthands
     * or max array length checks.
     *
     * @private
     * @param {number} n The number of times to invoke `iteratee`.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns the array of results.
     */
    function baseTimes(n, iteratee) {
      var index = -1,
          result = Array(n);
  
      while (++index < n) {
        result[index] = iteratee(index);
      }
      return result;
    }
  
    /**
     * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
     * of key-value pairs for `object` corresponding to the property names of `props`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array} props The property names to get values for.
     * @returns {Object} Returns the key-value pairs.
     */
    function baseToPairs(object, props) {
      return arrayMap(props, function(key) {
        return [key, object[key]];
      });
    }
  
    /**
     * The base implementation of `_.unary` without support for storing metadata.
     *
     * @private
     * @param {Function} func The function to cap arguments for.
     * @returns {Function} Returns the new capped function.
     */
    function baseUnary(func) {
      return function(value) {
        return func(value);
      };
    }
  
    /**
     * The base implementation of `_.values` and `_.valuesIn` which creates an
     * array of `object` property values corresponding to the property names
     * of `props`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array} props The property names to get values for.
     * @returns {Object} Returns the array of property values.
     */
    function baseValues(object, props) {
      return arrayMap(props, function(key) {
        return object[key];
      });
    }
  
    /**
     * Checks if a `cache` value for `key` exists.
     *
     * @private
     * @param {Object} cache The cache to query.
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function cacheHas(cache, key) {
      return cache.has(key);
    }
  
    /**
     * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
     * that is not found in the character symbols.
     *
     * @private
     * @param {Array} strSymbols The string symbols to inspect.
     * @param {Array} chrSymbols The character symbols to find.
     * @returns {number} Returns the index of the first unmatched string symbol.
     */
    function charsStartIndex(strSymbols, chrSymbols) {
      var index = -1,
          length = strSymbols.length;
  
      while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
      return index;
    }
  
    /**
     * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
     * that is not found in the character symbols.
     *
     * @private
     * @param {Array} strSymbols The string symbols to inspect.
     * @param {Array} chrSymbols The character symbols to find.
     * @returns {number} Returns the index of the last unmatched string symbol.
     */
    function charsEndIndex(strSymbols, chrSymbols) {
      var index = strSymbols.length;
  
      while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
      return index;
    }
  
    /**
     * Gets the number of `placeholder` occurrences in `array`.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {*} placeholder The placeholder to search for.
     * @returns {number} Returns the placeholder count.
     */
    function countHolders(array, placeholder) {
      var length = array.length,
          result = 0;
  
      while (length--) {
        if (array[length] === placeholder) {
          ++result;
        }
      }
      return result;
    }
  
    /**
     * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
     * letters to basic Latin letters.
     *
     * @private
     * @param {string} letter The matched letter to deburr.
     * @returns {string} Returns the deburred letter.
     */
    var deburrLetter = basePropertyOf(deburredLetters);
  
    /**
     * Used by `_.escape` to convert characters to HTML entities.
     *
     * @private
     * @param {string} chr The matched character to escape.
     * @returns {string} Returns the escaped character.
     */
    var escapeHtmlChar = basePropertyOf(htmlEscapes);
  
    /**
     * Used by `_.template` to escape characters for inclusion in compiled string literals.
     *
     * @private
     * @param {string} chr The matched character to escape.
     * @returns {string} Returns the escaped character.
     */
    function escapeStringChar(chr) {
      return '\\' + stringEscapes[chr];
    }
  
    /**
     * Gets the value at `key` of `object`.
     *
     * @private
     * @param {Object} [object] The object to query.
     * @param {string} key The key of the property to get.
     * @returns {*} Returns the property value.
     */
    function getValue(object, key) {
      return object == null ? undefined : object[key];
    }
  
    /**
     * Checks if `string` contains Unicode symbols.
     *
     * @private
     * @param {string} string The string to inspect.
     * @returns {boolean} Returns `true` if a symbol is found, else `false`.
     */
    function hasUnicode(string) {
      return reHasUnicode.test(string);
    }
  
    /**
     * Checks if `string` contains a word composed of Unicode symbols.
     *
     * @private
     * @param {string} string The string to inspect.
     * @returns {boolean} Returns `true` if a word is found, else `false`.
     */
    function hasUnicodeWord(string) {
      return reHasUnicodeWord.test(string);
    }
  
    /**
     * Converts `iterator` to an array.
     *
     * @private
     * @param {Object} iterator The iterator to convert.
     * @returns {Array} Returns the converted array.
     */
    function iteratorToArray(iterator) {
      var data,
          result = [];
  
      while (!(data = iterator.next()).done) {
        result.push(data.value);
      }
      return result;
    }
  
    /**
     * Converts `map` to its key-value pairs.
     *
     * @private
     * @param {Object} map The map to convert.
     * @returns {Array} Returns the key-value pairs.
     */
    function mapToArray(map) {
      var index = -1,
          result = Array(map.size);
  
      map.forEach(function(value, key) {
        result[++index] = [key, value];
      });
      return result;
    }
  
    /**
     * Creates a unary function that invokes `func` with its argument transformed.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {Function} transform The argument transform.
     * @returns {Function} Returns the new function.
     */
    function overArg(func, transform) {
      return function(arg) {
        return func(transform(arg));
      };
    }
  
    /**
     * Replaces all `placeholder` elements in `array` with an internal placeholder
     * and returns an array of their indexes.
     *
     * @private
     * @param {Array} array The array to modify.
     * @param {*} placeholder The placeholder to replace.
     * @returns {Array} Returns the new array of placeholder indexes.
     */
    function replaceHolders(array, placeholder) {
      var index = -1,
          length = array.length,
          resIndex = 0,
          result = [];
  
      while (++index < length) {
        var value = array[index];
        if (value === placeholder || value === PLACEHOLDER) {
          array[index] = PLACEHOLDER;
          result[resIndex++] = index;
        }
      }
      return result;
    }
  
    /**
     * Converts `set` to an array of its values.
     *
     * @private
     * @param {Object} set The set to convert.
     * @returns {Array} Returns the values.
     */
    function setToArray(set) {
      var index = -1,
          result = Array(set.size);
  
      set.forEach(function(value) {
        result[++index] = value;
      });
      return result;
    }
  
    /**
     * Converts `set` to its value-value pairs.
     *
     * @private
     * @param {Object} set The set to convert.
     * @returns {Array} Returns the value-value pairs.
     */
    function setToPairs(set) {
      var index = -1,
          result = Array(set.size);
  
      set.forEach(function(value) {
        result[++index] = [value, value];
      });
      return result;
    }
  
    /**
     * A specialized version of `_.indexOf` which performs strict equality
     * comparisons of values, i.e. `===`.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @param {number} fromIndex The index to search from.
     * @returns {number} Returns the index of the matched value, else `-1`.
     */
    function strictIndexOf(array, value, fromIndex) {
      var index = fromIndex - 1,
          length = array.length;
  
      while (++index < length) {
        if (array[index] === value) {
          return index;
        }
      }
      return -1;
    }
  
    /**
     * A specialized version of `_.lastIndexOf` which performs strict equality
     * comparisons of values, i.e. `===`.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @param {number} fromIndex The index to search from.
     * @returns {number} Returns the index of the matched value, else `-1`.
     */
    function strictLastIndexOf(array, value, fromIndex) {
      var index = fromIndex + 1;
      while (index--) {
        if (array[index] === value) {
          return index;
        }
      }
      return index;
    }
  
    /**
     * Gets the number of symbols in `string`.
     *
     * @private
     * @param {string} string The string to inspect.
     * @returns {number} Returns the string size.
     */
    function stringSize(string) {
      return hasUnicode(string)
        ? unicodeSize(string)
        : asciiSize(string);
    }
  
    /**
     * Converts `string` to an array.
     *
     * @private
     * @param {string} string The string to convert.
     * @returns {Array} Returns the converted array.
     */
    function stringToArray(string) {
      return hasUnicode(string)
        ? unicodeToArray(string)
        : asciiToArray(string);
    }
  
    /**
     * Used by `_.unescape` to convert HTML entities to characters.
     *
     * @private
     * @param {string} chr The matched character to unescape.
     * @returns {string} Returns the unescaped character.
     */
    var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
  
    /**
     * Gets the size of a Unicode `string`.
     *
     * @private
     * @param {string} string The string inspect.
     * @returns {number} Returns the string size.
     */
    function unicodeSize(string) {
      var result = reUnicode.lastIndex = 0;
      while (reUnicode.test(string)) {
        ++result;
      }
      return result;
    }
  
    /**
     * Converts a Unicode `string` to an array.
     *
     * @private
     * @param {string} string The string to convert.
     * @returns {Array} Returns the converted array.
     */
    function unicodeToArray(string) {
      return string.match(reUnicode) || [];
    }
  
    /**
     * Splits a Unicode `string` into an array of its words.
     *
     * @private
     * @param {string} The string to inspect.
     * @returns {Array} Returns the words of `string`.
     */
    function unicodeWords(string) {
      return string.match(reUnicodeWord) || [];
    }
  
    /*--------------------------------------------------------------------------*/
  
    /**
     * Create a new pristine `lodash` function using the `context` object.
     *
     * @static
     * @memberOf _
     * @since 1.1.0
     * @category Util
     * @param {Object} [context=root] The context object.
     * @returns {Function} Returns a new `lodash` function.
     * @example
     *
     * _.mixin({ 'foo': _.constant('foo') });
     *
     * var lodash = _.runInContext();
     * lodash.mixin({ 'bar': lodash.constant('bar') });
     *
     * _.isFunction(_.foo);
     * // => true
     * _.isFunction(_.bar);
     * // => false
     *
     * lodash.isFunction(lodash.foo);
     * // => false
     * lodash.isFunction(lodash.bar);
     * // => true
     *
     * // Create a suped-up `defer` in Node.js.
     * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
     */
    var runInContext = (function runInContext(context) {
      context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
  
      /** Built-in constructor references. */
      var Array = context.Array,
          Date = context.Date,
          Error = context.Error,
          Function = context.Function,
          Math = context.Math,
          Object = context.Object,
          RegExp = context.RegExp,
          String = context.String,
          TypeError = context.TypeError;
  
      /** Used for built-in method references. */
      var arrayProto = Array.prototype,
          funcProto = Function.prototype,
          objectProto = Object.prototype;
  
      /** Used to detect overreaching core-js shims. */
      var coreJsData = context['__core-js_shared__'];
  
      /** Used to resolve the decompiled source of functions. */
      var funcToString = funcProto.toString;
  
      /** Used to check objects for own properties. */
      var hasOwnProperty = objectProto.hasOwnProperty;
  
      /** Used to generate unique IDs. */
      var idCounter = 0;
  
      /** Used to detect methods masquerading as native. */
      var maskSrcKey = (function() {
        var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
        return uid ? ('Symbol(src)_1.' + uid) : '';
      }());
  
      /**
       * Used to resolve the
       * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
       * of values.
       */
      var nativeObjectToString = objectProto.toString;
  
      /** Used to infer the `Object` constructor. */
      var objectCtorString = funcToString.call(Object);
  
      /** Used to restore the original `_` reference in `_.noConflict`. */
      var oldDash = root._;
  
      /** Used to detect if a method is native. */
      var reIsNative = RegExp('^' +
        funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
        .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
      );
  
      /** Built-in value references. */
      var Buffer = moduleExports ? context.Buffer : undefined,
          Symbol = context.Symbol,
          Uint8Array = context.Uint8Array,
          allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
          getPrototype = overArg(Object.getPrototypeOf, Object),
          objectCreate = Object.create,
          propertyIsEnumerable = objectProto.propertyIsEnumerable,
          splice = arrayProto.splice,
          spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
          symIterator = Symbol ? Symbol.iterator : undefined,
          symToStringTag = Symbol ? Symbol.toStringTag : undefined;
  
      var defineProperty = (function() {
        try {
          var func = getNative(Object, 'defineProperty');
          func({}, '', {});
          return func;
        } catch (e) {}
      }());
  
      /** Mocked built-ins. */
      var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
          ctxNow = Date && Date.now !== root.Date.now && Date.now,
          ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
  
      /* Built-in method references for those with the same name as other `lodash` methods. */
      var nativeCeil = Math.ceil,
          nativeFloor = Math.floor,
          nativeGetSymbols = Object.getOwnPropertySymbols,
          nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
          nativeIsFinite = context.isFinite,
          nativeJoin = arrayProto.join,
          nativeKeys = overArg(Object.keys, Object),
          nativeMax = Math.max,
          nativeMin = Math.min,
          nativeNow = Date.now,
          nativeParseInt = context.parseInt,
          nativeRandom = Math.random,
          nativeReverse = arrayProto.reverse;
  
      /* Built-in method references that are verified to be native. */
      var DataView = getNative(context, 'DataView'),
          Map = getNative(context, 'Map'),
          Promise = getNative(context, 'Promise'),
          Set = getNative(context, 'Set'),
          WeakMap = getNative(context, 'WeakMap'),
          nativeCreate = getNative(Object, 'create');
  
      /** Used to store function metadata. */
      var metaMap = WeakMap && new WeakMap;
  
      /** Used to lookup unminified function names. */
      var realNames = {};
  
      /** Used to detect maps, sets, and weakmaps. */
      var dataViewCtorString = toSource(DataView),
          mapCtorString = toSource(Map),
          promiseCtorString = toSource(Promise),
          setCtorString = toSource(Set),
          weakMapCtorString = toSource(WeakMap);
  
      /** Used to convert symbols to primitives and strings. */
      var symbolProto = Symbol ? Symbol.prototype : undefined,
          symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
          symbolToString = symbolProto ? symbolProto.toString : undefined;
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates a `lodash` object which wraps `value` to enable implicit method
       * chain sequences. Methods that operate on and return arrays, collections,
       * and functions can be chained together. Methods that retrieve a single value
       * or may return a primitive value will automatically end the chain sequence
       * and return the unwrapped value. Otherwise, the value must be unwrapped
       * with `_#value`.
       *
       * Explicit chain sequences, which must be unwrapped with `_#value`, may be
       * enabled using `_.chain`.
       *
       * The execution of chained methods is lazy, that is, it's deferred until
       * `_#value` is implicitly or explicitly called.
       *
       * Lazy evaluation allows several methods to support shortcut fusion.
       * Shortcut fusion is an optimization to merge iteratee calls; this avoids
       * the creation of intermediate arrays and can greatly reduce the number of
       * iteratee executions. Sections of a chain sequence qualify for shortcut
       * fusion if the section is applied to an array and iteratees accept only
       * one argument. The heuristic for whether a section qualifies for shortcut
       * fusion is subject to change.
       *
       * Chaining is supported in custom builds as long as the `_#value` method is
       * directly or indirectly included in the build.
       *
       * In addition to lodash methods, wrappers have `Array` and `String` methods.
       *
       * The wrapper `Array` methods are:
       * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
       *
       * The wrapper `String` methods are:
       * `replace` and `split`
       *
       * The wrapper methods that support shortcut fusion are:
       * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
       * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
       * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
       *
       * The chainable wrapper methods are:
       * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
       * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
       * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
       * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
       * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
       * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
       * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
       * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
       * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
       * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
       * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
       * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
       * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
       * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
       * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
       * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
       * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
       * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
       * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
       * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
       * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
       * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
       * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
       * `zipObject`, `zipObjectDeep`, and `zipWith`
       *
       * The wrapper methods that are **not** chainable by default are:
       * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
       * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
       * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
       * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
       * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
       * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
       * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
       * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
       * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
       * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
       * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
       * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
       * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
       * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
       * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
       * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
       * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
       * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
       * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
       * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
       * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
       * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
       * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
       * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
       * `upperFirst`, `value`, and `words`
       *
       * @name _
       * @constructor
       * @category Seq
       * @param {*} value The value to wrap in a `lodash` instance.
       * @returns {Object} Returns the new `lodash` wrapper instance.
       * @example
       *
       * function square(n) {
       *   return n * n;
       * }
       *
       * var wrapped = _([1, 2, 3]);
       *
       * // Returns an unwrapped value.
       * wrapped.reduce(_.add);
       * // => 6
       *
       * // Returns a wrapped value.
       * var squares = wrapped.map(square);
       *
       * _.isArray(squares);
       * // => false
       *
       * _.isArray(squares.value());
       * // => true
       */
      function lodash(value) {
        if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
          if (value instanceof LodashWrapper) {
            return value;
          }
          if (hasOwnProperty.call(value, '__wrapped__')) {
            return wrapperClone(value);
          }
        }
        return new LodashWrapper(value);
      }
  
      /**
       * The base implementation of `_.create` without support for assigning
       * properties to the created object.
       *
       * @private
       * @param {Object} proto The object to inherit from.
       * @returns {Object} Returns the new object.
       */
      var baseCreate = (function() {
        function object() {}
        return function(proto) {
          if (!isObject(proto)) {
            return {};
          }
          if (objectCreate) {
            return objectCreate(proto);
          }
          object.prototype = proto;
          var result = new object;
          object.prototype = undefined;
          return result;
        };
      }());
  
      /**
       * The function whose prototype chain sequence wrappers inherit from.
       *
       * @private
       */
      function baseLodash() {
        // No operation performed.
      }
  
      /**
       * The base constructor for creating `lodash` wrapper objects.
       *
       * @private
       * @param {*} value The value to wrap.
       * @param {boolean} [chainAll] Enable explicit method chain sequences.
       */
      function LodashWrapper(value, chainAll) {
        this.__wrapped__ = value;
        this.__actions__ = [];
        this.__chain__ = !!chainAll;
        this.__index__ = 0;
        this.__values__ = undefined;
      }
  
      /**
       * By default, the template delimiters used by lodash are like those in
       * embedded Ruby (ERB) as well as ES2015 template strings. Change the
       * following template settings to use alternative delimiters.
       *
       * @static
       * @memberOf _
       * @type {Object}
       */
      lodash.templateSettings = {
  
        /**
         * Used to detect `data` property values to be HTML-escaped.
         *
         * @memberOf _.templateSettings
         * @type {RegExp}
         */
        'escape': reEscape,
  
        /**
         * Used to detect code to be evaluated.
         *
         * @memberOf _.templateSettings
         * @type {RegExp}
         */
        'evaluate': reEvaluate,
  
        /**
         * Used to detect `data` property values to inject.
         *
         * @memberOf _.templateSettings
         * @type {RegExp}
         */
        'interpolate': reInterpolate,
  
        /**
         * Used to reference the data object in the template text.
         *
         * @memberOf _.templateSettings
         * @type {string}
         */
        'variable': '',
  
        /**
         * Used to import variables into the compiled template.
         *
         * @memberOf _.templateSettings
         * @type {Object}
         */
        'imports': {
  
          /**
           * A reference to the `lodash` function.
           *
           * @memberOf _.templateSettings.imports
           * @type {Function}
           */
          '_': lodash
        }
      };
  
      // Ensure wrappers are instances of `baseLodash`.
      lodash.prototype = baseLodash.prototype;
      lodash.prototype.constructor = lodash;
  
      LodashWrapper.prototype = baseCreate(baseLodash.prototype);
      LodashWrapper.prototype.constructor = LodashWrapper;
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
       *
       * @private
       * @constructor
       * @param {*} value The value to wrap.
       */
      function LazyWrapper(value) {
        this.__wrapped__ = value;
        this.__actions__ = [];
        this.__dir__ = 1;
        this.__filtered__ = false;
        this.__iteratees__ = [];
        this.__takeCount__ = MAX_ARRAY_LENGTH;
        this.__views__ = [];
      }
  
      /**
       * Creates a clone of the lazy wrapper object.
       *
       * @private
       * @name clone
       * @memberOf LazyWrapper
       * @returns {Object} Returns the cloned `LazyWrapper` object.
       */
      function lazyClone() {
        var result = new LazyWrapper(this.__wrapped__);
        result.__actions__ = copyArray(this.__actions__);
        result.__dir__ = this.__dir__;
        result.__filtered__ = this.__filtered__;
        result.__iteratees__ = copyArray(this.__iteratees__);
        result.__takeCount__ = this.__takeCount__;
        result.__views__ = copyArray(this.__views__);
        return result;
      }
  
      /**
       * Reverses the direction of lazy iteration.
       *
       * @private
       * @name reverse
       * @memberOf LazyWrapper
       * @returns {Object} Returns the new reversed `LazyWrapper` object.
       */
      function lazyReverse() {
        if (this.__filtered__) {
          var result = new LazyWrapper(this);
          result.__dir__ = -1;
          result.__filtered__ = true;
        } else {
          result = this.clone();
          result.__dir__ *= -1;
        }
        return result;
      }
  
      /**
       * Extracts the unwrapped value from its lazy wrapper.
       *
       * @private
       * @name value
       * @memberOf LazyWrapper
       * @returns {*} Returns the unwrapped value.
       */
      function lazyValue() {
        var array = this.__wrapped__.value(),
            dir = this.__dir__,
            isArr = isArray(array),
            isRight = dir < 0,
            arrLength = isArr ? array.length : 0,
            view = getView(0, arrLength, this.__views__),
            start = view.start,
            end = view.end,
            length = end - start,
            index = isRight ? end : (start - 1),
            iteratees = this.__iteratees__,
            iterLength = iteratees.length,
            resIndex = 0,
            takeCount = nativeMin(length, this.__takeCount__);
  
        if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
          return baseWrapperValue(array, this.__actions__);
        }
        var result = [];
  
        outer:
        while (length-- && resIndex < takeCount) {
          index += dir;
  
          var iterIndex = -1,
              value = array[index];
  
          while (++iterIndex < iterLength) {
            var data = iteratees[iterIndex],
                iteratee = data.iteratee,
                type = data.type,
                computed = iteratee(value);
  
            if (type == LAZY_MAP_FLAG) {
              value = computed;
            } else if (!computed) {
              if (type == LAZY_FILTER_FLAG) {
                continue outer;
              } else {
                break outer;
              }
            }
          }
          result[resIndex++] = value;
        }
        return result;
      }
  
      // Ensure `LazyWrapper` is an instance of `baseLodash`.
      LazyWrapper.prototype = baseCreate(baseLodash.prototype);
      LazyWrapper.prototype.constructor = LazyWrapper;
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates a hash object.
       *
       * @private
       * @constructor
       * @param {Array} [entries] The key-value pairs to cache.
       */
      function Hash(entries) {
        var index = -1,
            length = entries == null ? 0 : entries.length;
  
        this.clear();
        while (++index < length) {
          var entry = entries[index];
          this.set(entry[0], entry[1]);
        }
      }
  
      /**
       * Removes all key-value entries from the hash.
       *
       * @private
       * @name clear
       * @memberOf Hash
       */
      function hashClear() {
        this.__data__ = nativeCreate ? nativeCreate(null) : {};
        this.size = 0;
      }
  
      /**
       * Removes `key` and its value from the hash.
       *
       * @private
       * @name delete
       * @memberOf Hash
       * @param {Object} hash The hash to modify.
       * @param {string} key The key of the value to remove.
       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
       */
      function hashDelete(key) {
        var result = this.has(key) && delete this.__data__[key];
        this.size -= result ? 1 : 0;
        return result;
      }
  
      /**
       * Gets the hash value for `key`.
       *
       * @private
       * @name get
       * @memberOf Hash
       * @param {string} key The key of the value to get.
       * @returns {*} Returns the entry value.
       */
      function hashGet(key) {
        var data = this.__data__;
        if (nativeCreate) {
          var result = data[key];
          return result === HASH_UNDEFINED ? undefined : result;
        }
        return hasOwnProperty.call(data, key) ? data[key] : undefined;
      }
  
      /**
       * Checks if a hash value for `key` exists.
       *
       * @private
       * @name has
       * @memberOf Hash
       * @param {string} key The key of the entry to check.
       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
       */
      function hashHas(key) {
        var data = this.__data__;
        return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
      }
  
      /**
       * Sets the hash `key` to `value`.
       *
       * @private
       * @name set
       * @memberOf Hash
       * @param {string} key The key of the value to set.
       * @param {*} value The value to set.
       * @returns {Object} Returns the hash instance.
       */
      function hashSet(key, value) {
        var data = this.__data__;
        this.size += this.has(key) ? 0 : 1;
        data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
        return this;
      }
  
      // Add methods to `Hash`.
      Hash.prototype.clear = hashClear;
      Hash.prototype['delete'] = hashDelete;
      Hash.prototype.get = hashGet;
      Hash.prototype.has = hashHas;
      Hash.prototype.set = hashSet;
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates an list cache object.
       *
       * @private
       * @constructor
       * @param {Array} [entries] The key-value pairs to cache.
       */
      function ListCache(entries) {
        var index = -1,
            length = entries == null ? 0 : entries.length;
  
        this.clear();
        while (++index < length) {
          var entry = entries[index];
          this.set(entry[0], entry[1]);
        }
      }
  
      /**
       * Removes all key-value entries from the list cache.
       *
       * @private
       * @name clear
       * @memberOf ListCache
       */
      function listCacheClear() {
        this.__data__ = [];
        this.size = 0;
      }
  
      /**
       * Removes `key` and its value from the list cache.
       *
       * @private
       * @name delete
       * @memberOf ListCache
       * @param {string} key The key of the value to remove.
       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
       */
      function listCacheDelete(key) {
        var data = this.__data__,
            index = assocIndexOf(data, key);
  
        if (index < 0) {
          return false;
        }
        var lastIndex = data.length - 1;
        if (index == lastIndex) {
          data.pop();
        } else {
          splice.call(data, index, 1);
        }
        --this.size;
        return true;
      }
  
      /**
       * Gets the list cache value for `key`.
       *
       * @private
       * @name get
       * @memberOf ListCache
       * @param {string} key The key of the value to get.
       * @returns {*} Returns the entry value.
       */
      function listCacheGet(key) {
        var data = this.__data__,
            index = assocIndexOf(data, key);
  
        return index < 0 ? undefined : data[index][1];
      }
  
      /**
       * Checks if a list cache value for `key` exists.
       *
       * @private
       * @name has
       * @memberOf ListCache
       * @param {string} key The key of the entry to check.
       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
       */
      function listCacheHas(key) {
        return assocIndexOf(this.__data__, key) > -1;
      }
  
      /**
       * Sets the list cache `key` to `value`.
       *
       * @private
       * @name set
       * @memberOf ListCache
       * @param {string} key The key of the value to set.
       * @param {*} value The value to set.
       * @returns {Object} Returns the list cache instance.
       */
      function listCacheSet(key, value) {
        var data = this.__data__,
            index = assocIndexOf(data, key);
  
        if (index < 0) {
          ++this.size;
          data.push([key, value]);
        } else {
          data[index][1] = value;
        }
        return this;
      }
  
      // Add methods to `ListCache`.
      ListCache.prototype.clear = listCacheClear;
      ListCache.prototype['delete'] = listCacheDelete;
      ListCache.prototype.get = listCacheGet;
      ListCache.prototype.has = listCacheHas;
      ListCache.prototype.set = listCacheSet;
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates a map cache object to store key-value pairs.
       *
       * @private
       * @constructor
       * @param {Array} [entries] The key-value pairs to cache.
       */
      function MapCache(entries) {
        var index = -1,
            length = entries == null ? 0 : entries.length;
  
        this.clear();
        while (++index < length) {
          var entry = entries[index];
          this.set(entry[0], entry[1]);
        }
      }
  
      /**
       * Removes all key-value entries from the map.
       *
       * @private
       * @name clear
       * @memberOf MapCache
       */
      function mapCacheClear() {
        this.size = 0;
        this.__data__ = {
          'hash': new Hash,
          'map': new (Map || ListCache),
          'string': new Hash
        };
      }
  
      /**
       * Removes `key` and its value from the map.
       *
       * @private
       * @name delete
       * @memberOf MapCache
       * @param {string} key The key of the value to remove.
       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
       */
      function mapCacheDelete(key) {
        var result = getMapData(this, key)['delete'](key);
        this.size -= result ? 1 : 0;
        return result;
      }
  
      /**
       * Gets the map value for `key`.
       *
       * @private
       * @name get
       * @memberOf MapCache
       * @param {string} key The key of the value to get.
       * @returns {*} Returns the entry value.
       */
      function mapCacheGet(key) {
        return getMapData(this, key).get(key);
      }
  
      /**
       * Checks if a map value for `key` exists.
       *
       * @private
       * @name has
       * @memberOf MapCache
       * @param {string} key The key of the entry to check.
       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
       */
      function mapCacheHas(key) {
        return getMapData(this, key).has(key);
      }
  
      /**
       * Sets the map `key` to `value`.
       *
       * @private
       * @name set
       * @memberOf MapCache
       * @param {string} key The key of the value to set.
       * @param {*} value The value to set.
       * @returns {Object} Returns the map cache instance.
       */
      function mapCacheSet(key, value) {
        var data = getMapData(this, key),
            size = data.size;
  
        data.set(key, value);
        this.size += data.size == size ? 0 : 1;
        return this;
      }
  
      // Add methods to `MapCache`.
      MapCache.prototype.clear = mapCacheClear;
      MapCache.prototype['delete'] = mapCacheDelete;
      MapCache.prototype.get = mapCacheGet;
      MapCache.prototype.has = mapCacheHas;
      MapCache.prototype.set = mapCacheSet;
  
      /*------------------------------------------------------------------------*/
  
      /**
       *
       * Creates an array cache object to store unique values.
       *
       * @private
       * @constructor
       * @param {Array} [values] The values to cache.
       */
      function SetCache(values) {
        var index = -1,
            length = values == null ? 0 : values.length;
  
        this.__data__ = new MapCache;
        while (++index < length) {
          this.add(values[index]);
        }
      }
  
      /**
       * Adds `value` to the array cache.
       *
       * @private
       * @name add
       * @memberOf SetCache
       * @alias push
       * @param {*} value The value to cache.
       * @returns {Object} Returns the cache instance.
       */
      function setCacheAdd(value) {
        this.__data__.set(value, HASH_UNDEFINED);
        return this;
      }
  
      /**
       * Checks if `value` is in the array cache.
       *
       * @private
       * @name has
       * @memberOf SetCache
       * @param {*} value The value to search for.
       * @returns {number} Returns `true` if `value` is found, else `false`.
       */
      function setCacheHas(value) {
        return this.__data__.has(value);
      }
  
      // Add methods to `SetCache`.
      SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
      SetCache.prototype.has = setCacheHas;
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates a stack cache object to store key-value pairs.
       *
       * @private
       * @constructor
       * @param {Array} [entries] The key-value pairs to cache.
       */
      function Stack(entries) {
        var data = this.__data__ = new ListCache(entries);
        this.size = data.size;
      }
  
      /**
       * Removes all key-value entries from the stack.
       *
       * @private
       * @name clear
       * @memberOf Stack
       */
      function stackClear() {
        this.__data__ = new ListCache;
        this.size = 0;
      }
  
      /**
       * Removes `key` and its value from the stack.
       *
       * @private
       * @name delete
       * @memberOf Stack
       * @param {string} key The key of the value to remove.
       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
       */
      function stackDelete(key) {
        var data = this.__data__,
            result = data['delete'](key);
  
        this.size = data.size;
        return result;
      }
  
      /**
       * Gets the stack value for `key`.
       *
       * @private
       * @name get
       * @memberOf Stack
       * @param {string} key The key of the value to get.
       * @returns {*} Returns the entry value.
       */
      function stackGet(key) {
        return this.__data__.get(key);
      }
  
      /**
       * Checks if a stack value for `key` exists.
       *
       * @private
       * @name has
       * @memberOf Stack
       * @param {string} key The key of the entry to check.
       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
       */
      function stackHas(key) {
        return this.__data__.has(key);
      }
  
      /**
       * Sets the stack `key` to `value`.
       *
       * @private
       * @name set
       * @memberOf Stack
       * @param {string} key The key of the value to set.
       * @param {*} value The value to set.
       * @returns {Object} Returns the stack cache instance.
       */
      function stackSet(key, value) {
        var data = this.__data__;
        if (data instanceof ListCache) {
          var pairs = data.__data__;
          if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
            pairs.push([key, value]);
            this.size = ++data.size;
            return this;
          }
          data = this.__data__ = new MapCache(pairs);
        }
        data.set(key, value);
        this.size = data.size;
        return this;
      }
  
      // Add methods to `Stack`.
      Stack.prototype.clear = stackClear;
      Stack.prototype['delete'] = stackDelete;
      Stack.prototype.get = stackGet;
      Stack.prototype.has = stackHas;
      Stack.prototype.set = stackSet;
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates an array of the enumerable property names of the array-like `value`.
       *
       * @private
       * @param {*} value The value to query.
       * @param {boolean} inherited Specify returning inherited property names.
       * @returns {Array} Returns the array of property names.
       */
      function arrayLikeKeys(value, inherited) {
        var isArr = isArray(value),
            isArg = !isArr && isArguments(value),
            isBuff = !isArr && !isArg && isBuffer(value),
            isType = !isArr && !isArg && !isBuff && isTypedArray(value),
            skipIndexes = isArr || isArg || isBuff || isType,
            result = skipIndexes ? baseTimes(value.length, String) : [],
            length = result.length;
  
        for (var key in value) {
          if ((inherited || hasOwnProperty.call(value, key)) &&
              !(skipIndexes && (
                 // Safari 9 has enumerable `arguments.length` in strict mode.
                 key == 'length' ||
                 // Node.js 0.10 has enumerable non-index properties on buffers.
                 (isBuff && (key == 'offset' || key == 'parent')) ||
                 // PhantomJS 2 has enumerable non-index properties on typed arrays.
                 (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
                 // Skip index properties.
                 isIndex(key, length)
              ))) {
            result.push(key);
          }
        }
        return result;
      }
  
      /**
       * A specialized version of `_.sample` for arrays.
       *
       * @private
       * @param {Array} array The array to sample.
       * @returns {*} Returns the random element.
       */
      function arraySample(array) {
        var length = array.length;
        return length ? array[baseRandom(0, length - 1)] : undefined;
      }
  
      /**
       * A specialized version of `_.sampleSize` for arrays.
       *
       * @private
       * @param {Array} array The array to sample.
       * @param {number} n The number of elements to sample.
       * @returns {Array} Returns the random elements.
       */
      function arraySampleSize(array, n) {
        return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
      }
  
      /**
       * A specialized version of `_.shuffle` for arrays.
       *
       * @private
       * @param {Array} array The array to shuffle.
       * @returns {Array} Returns the new shuffled array.
       */
      function arrayShuffle(array) {
        return shuffleSelf(copyArray(array));
      }
  
      /**
       * This function is like `assignValue` except that it doesn't assign
       * `undefined` values.
       *
       * @private
       * @param {Object} object The object to modify.
       * @param {string} key The key of the property to assign.
       * @param {*} value The value to assign.
       */
      function assignMergeValue(object, key, value) {
        if ((value !== undefined && !eq(object[key], value)) ||
            (value === undefined && !(key in object))) {
          baseAssignValue(object, key, value);
        }
      }
  
      /**
       * Assigns `value` to `key` of `object` if the existing value is not equivalent
       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * for equality comparisons.
       *
       * @private
       * @param {Object} object The object to modify.
       * @param {string} key The key of the property to assign.
       * @param {*} value The value to assign.
       */
      function assignValue(object, key, value) {
        var objValue = object[key];
        if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
            (value === undefined && !(key in object))) {
          baseAssignValue(object, key, value);
        }
      }
  
      /**
       * Gets the index at which the `key` is found in `array` of key-value pairs.
       *
       * @private
       * @param {Array} array The array to inspect.
       * @param {*} key The key to search for.
       * @returns {number} Returns the index of the matched value, else `-1`.
       */
      function assocIndexOf(array, key) {
        var length = array.length;
        while (length--) {
          if (eq(array[length][0], key)) {
            return length;
          }
        }
        return -1;
      }
  
      /**
       * Aggregates elements of `collection` on `accumulator` with keys transformed
       * by `iteratee` and values set by `setter`.
       *
       * @private
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} setter The function to set `accumulator` values.
       * @param {Function} iteratee The iteratee to transform keys.
       * @param {Object} accumulator The initial aggregated object.
       * @returns {Function} Returns `accumulator`.
       */
      function baseAggregator(collection, setter, iteratee, accumulator) {
        baseEach(collection, function(value, key, collection) {
          setter(accumulator, value, iteratee(value), collection);
        });
        return accumulator;
      }
  
      /**
       * The base implementation of `_.assign` without support for multiple sources
       * or `customizer` functions.
       *
       * @private
       * @param {Object} object The destination object.
       * @param {Object} source The source object.
       * @returns {Object} Returns `object`.
       */
      function baseAssign(object, source) {
        return object && copyObject(source, keys(source), object);
      }
  
      /**
       * The base implementation of `_.assignIn` without support for multiple sources
       * or `customizer` functions.
       *
       * @private
       * @param {Object} object The destination object.
       * @param {Object} source The source object.
       * @returns {Object} Returns `object`.
       */
      function baseAssignIn(object, source) {
        return object && copyObject(source, keysIn(source), object);
      }
  
      /**
       * The base implementation of `assignValue` and `assignMergeValue` without
       * value checks.
       *
       * @private
       * @param {Object} object The object to modify.
       * @param {string} key The key of the property to assign.
       * @param {*} value The value to assign.
       */
      function baseAssignValue(object, key, value) {
        if (key == '__proto__' && defineProperty) {
          defineProperty(object, key, {
            'configurable': true,
            'enumerable': true,
            'value': value,
            'writable': true
          });
        } else {
          object[key] = value;
        }
      }
  
      /**
       * The base implementation of `_.at` without support for individual paths.
       *
       * @private
       * @param {Object} object The object to iterate over.
       * @param {string[]} paths The property paths to pick.
       * @returns {Array} Returns the picked elements.
       */
      function baseAt(object, paths) {
        var index = -1,
            length = paths.length,
            result = Array(length),
            skip = object == null;
  
        while (++index < length) {
          result[index] = skip ? undefined : get(object, paths[index]);
        }
        return result;
      }
  
      /**
       * The base implementation of `_.clamp` which doesn't coerce arguments.
       *
       * @private
       * @param {number} number The number to clamp.
       * @param {number} [lower] The lower bound.
       * @param {number} upper The upper bound.
       * @returns {number} Returns the clamped number.
       */
      function baseClamp(number, lower, upper) {
        if (number === number) {
          if (upper !== undefined) {
            number = number <= upper ? number : upper;
          }
          if (lower !== undefined) {
            number = number >= lower ? number : lower;
          }
        }
        return number;
      }
  
      /**
       * The base implementation of `_.clone` and `_.cloneDeep` which tracks
       * traversed objects.
       *
       * @private
       * @param {*} value The value to clone.
       * @param {boolean} bitmask The bitmask flags.
       *  1 - Deep clone
       *  2 - Flatten inherited properties
       *  4 - Clone symbols
       * @param {Function} [customizer] The function to customize cloning.
       * @param {string} [key] The key of `value`.
       * @param {Object} [object] The parent object of `value`.
       * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
       * @returns {*} Returns the cloned value.
       */
      function baseClone(value, bitmask, customizer, key, object, stack) {
        var result,
            isDeep = bitmask & CLONE_DEEP_FLAG,
            isFlat = bitmask & CLONE_FLAT_FLAG,
            isFull = bitmask & CLONE_SYMBOLS_FLAG;
  
        if (customizer) {
          result = object ? customizer(value, key, object, stack) : customizer(value);
        }
        if (result !== undefined) {
          return result;
        }
        if (!isObject(value)) {
          return value;
        }
        var isArr = isArray(value);
        if (isArr) {
          result = initCloneArray(value);
          if (!isDeep) {
            return copyArray(value, result);
          }
        } else {
          var tag = getTag(value),
              isFunc = tag == funcTag || tag == genTag;
  
          if (isBuffer(value)) {
            return cloneBuffer(value, isDeep);
          }
          if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
            result = (isFlat || isFunc) ? {} : initCloneObject(value);
            if (!isDeep) {
              return isFlat
                ? copySymbolsIn(value, baseAssignIn(result, value))
                : copySymbols(value, baseAssign(result, value));
            }
          } else {
            if (!cloneableTags[tag]) {
              return object ? value : {};
            }
            result = initCloneByTag(value, tag, isDeep);
          }
        }
        // Check for circular references and return its corresponding clone.
        stack || (stack = new Stack);
        var stacked = stack.get(value);
        if (stacked) {
          return stacked;
        }
        stack.set(value, result);
  
        if (isSet(value)) {
          value.forEach(function(subValue) {
            result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
          });
  
          return result;
        }
  
        if (isMap(value)) {
          value.forEach(function(subValue, key) {
            result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
          });
  
          return result;
        }
  
        var keysFunc = isFull
          ? (isFlat ? getAllKeysIn : getAllKeys)
          : (isFlat ? keysIn : keys);
  
        var props = isArr ? undefined : keysFunc(value);
        arrayEach(props || value, function(subValue, key) {
          if (props) {
            key = subValue;
            subValue = value[key];
          }
          // Recursively populate clone (susceptible to call stack limits).
          assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
        });
        return result;
      }
  
      /**
       * The base implementation of `_.conforms` which doesn't clone `source`.
       *
       * @private
       * @param {Object} source The object of property predicates to conform to.
       * @returns {Function} Returns the new spec function.
       */
      function baseConforms(source) {
        var props = keys(source);
        return function(object) {
          return baseConformsTo(object, source, props);
        };
      }
  
      /**
       * The base implementation of `_.conformsTo` which accepts `props` to check.
       *
       * @private
       * @param {Object} object The object to inspect.
       * @param {Object} source The object of property predicates to conform to.
       * @returns {boolean} Returns `true` if `object` conforms, else `false`.
       */
      function baseConformsTo(object, source, props) {
        var length = props.length;
        if (object == null) {
          return !length;
        }
        object = Object(object);
        while (length--) {
          var key = props[length],
              predicate = source[key],
              value = object[key];
  
          if ((value === undefined && !(key in object)) || !predicate(value)) {
            return false;
          }
        }
        return true;
      }
  
      /**
       * The base implementation of `_.delay` and `_.defer` which accepts `args`
       * to provide to `func`.
       *
       * @private
       * @param {Function} func The function to delay.
       * @param {number} wait The number of milliseconds to delay invocation.
       * @param {Array} args The arguments to provide to `func`.
       * @returns {number|Object} Returns the timer id or timeout object.
       */
      function baseDelay(func, wait, args) {
        if (typeof func != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        return setTimeout(function() { func.apply(undefined, args); }, wait);
      }
  
      /**
       * The base implementation of methods like `_.difference` without support
       * for excluding multiple arrays or iteratee shorthands.
       *
       * @private
       * @param {Array} array The array to inspect.
       * @param {Array} values The values to exclude.
       * @param {Function} [iteratee] The iteratee invoked per element.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new array of filtered values.
       */
      function baseDifference(array, values, iteratee, comparator) {
        var index = -1,
            includes = arrayIncludes,
            isCommon = true,
            length = array.length,
            result = [],
            valuesLength = values.length;
  
        if (!length) {
          return result;
        }
        if (iteratee) {
          values = arrayMap(values, baseUnary(iteratee));
        }
        if (comparator) {
          includes = arrayIncludesWith;
          isCommon = false;
        }
        else if (values.length >= LARGE_ARRAY_SIZE) {
          includes = cacheHas;
          isCommon = false;
          values = new SetCache(values);
        }
        outer:
        while (++index < length) {
          var value = array[index],
              computed = iteratee == null ? value : iteratee(value);
  
          value = (comparator || value !== 0) ? value : 0;
          if (isCommon && computed === computed) {
            var valuesIndex = valuesLength;
            while (valuesIndex--) {
              if (values[valuesIndex] === computed) {
                continue outer;
              }
            }
            result.push(value);
          }
          else if (!includes(values, computed, comparator)) {
            result.push(value);
          }
        }
        return result;
      }
  
      /**
       * The base implementation of `_.forEach` without support for iteratee shorthands.
       *
       * @private
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} iteratee The function invoked per iteration.
       * @returns {Array|Object} Returns `collection`.
       */
      var baseEach = createBaseEach(baseForOwn);
  
      /**
       * The base implementation of `_.forEachRight` without support for iteratee shorthands.
       *
       * @private
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} iteratee The function invoked per iteration.
       * @returns {Array|Object} Returns `collection`.
       */
      var baseEachRight = createBaseEach(baseForOwnRight, true);
  
      /**
       * The base implementation of `_.every` without support for iteratee shorthands.
       *
       * @private
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} predicate The function invoked per iteration.
       * @returns {boolean} Returns `true` if all elements pass the predicate check,
       *  else `false`
       */
      function baseEvery(collection, predicate) {
        var result = true;
        baseEach(collection, function(value, index, collection) {
          result = !!predicate(value, index, collection);
          return result;
        });
        return result;
      }
  
      /**
       * The base implementation of methods like `_.max` and `_.min` which accepts a
       * `comparator` to determine the extremum value.
       *
       * @private
       * @param {Array} array The array to iterate over.
       * @param {Function} iteratee The iteratee invoked per iteration.
       * @param {Function} comparator The comparator used to compare values.
       * @returns {*} Returns the extremum value.
       */
      function baseExtremum(array, iteratee, comparator) {
        var index = -1,
            length = array.length;
  
        while (++index < length) {
          var value = array[index],
              current = iteratee(value);
  
          if (current != null && (computed === undefined
                ? (current === current && !isSymbol(current))
                : comparator(current, computed)
              )) {
            var computed = current,
                result = value;
          }
        }
        return result;
      }
  
      /**
       * The base implementation of `_.fill` without an iteratee call guard.
       *
       * @private
       * @param {Array} array The array to fill.
       * @param {*} value The value to fill `array` with.
       * @param {number} [start=0] The start position.
       * @param {number} [end=array.length] The end position.
       * @returns {Array} Returns `array`.
       */
      function baseFill(array, value, start, end) {
        var length = array.length;
  
        start = toInteger(start);
        if (start < 0) {
          start = -start > length ? 0 : (length + start);
        }
        end = (end === undefined || end > length) ? length : toInteger(end);
        if (end < 0) {
          end += length;
        }
        end = start > end ? 0 : toLength(end);
        while (start < end) {
          array[start++] = value;
        }
        return array;
      }
  
      /**
       * The base implementation of `_.filter` without support for iteratee shorthands.
       *
       * @private
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} predicate The function invoked per iteration.
       * @returns {Array} Returns the new filtered array.
       */
      function baseFilter(collection, predicate) {
        var result = [];
        baseEach(collection, function(value, index, collection) {
          if (predicate(value, index, collection)) {
            result.push(value);
          }
        });
        return result;
      }
  
      /**
       * The base implementation of `_.flatten` with support for restricting flattening.
       *
       * @private
       * @param {Array} array The array to flatten.
       * @param {number} depth The maximum recursion depth.
       * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
       * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
       * @param {Array} [result=[]] The initial result value.
       * @returns {Array} Returns the new flattened array.
       */
      function baseFlatten(array, depth, predicate, isStrict, result) {
        var index = -1,
            length = array.length;
  
        predicate || (predicate = isFlattenable);
        result || (result = []);
  
        while (++index < length) {
          var value = array[index];
          if (depth > 0 && predicate(value)) {
            if (depth > 1) {
              // Recursively flatten arrays (susceptible to call stack limits).
              baseFlatten(value, depth - 1, predicate, isStrict, result);
            } else {
              arrayPush(result, value);
            }
          } else if (!isStrict) {
            result[result.length] = value;
          }
        }
        return result;
      }
  
      /**
       * The base implementation of `baseForOwn` which iterates over `object`
       * properties returned by `keysFunc` and invokes `iteratee` for each property.
       * Iteratee functions may exit iteration early by explicitly returning `false`.
       *
       * @private
       * @param {Object} object The object to iterate over.
       * @param {Function} iteratee The function invoked per iteration.
       * @param {Function} keysFunc The function to get the keys of `object`.
       * @returns {Object} Returns `object`.
       */
      var baseFor = createBaseFor();
  
      /**
       * This function is like `baseFor` except that it iterates over properties
       * in the opposite order.
       *
       * @private
       * @param {Object} object The object to iterate over.
       * @param {Function} iteratee The function invoked per iteration.
       * @param {Function} keysFunc The function to get the keys of `object`.
       * @returns {Object} Returns `object`.
       */
      var baseForRight = createBaseFor(true);
  
      /**
       * The base implementation of `_.forOwn` without support for iteratee shorthands.
       *
       * @private
       * @param {Object} object The object to iterate over.
       * @param {Function} iteratee The function invoked per iteration.
       * @returns {Object} Returns `object`.
       */
      function baseForOwn(object, iteratee) {
        return object && baseFor(object, iteratee, keys);
      }
  
      /**
       * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
       *
       * @private
       * @param {Object} object The object to iterate over.
       * @param {Function} iteratee The function invoked per iteration.
       * @returns {Object} Returns `object`.
       */
      function baseForOwnRight(object, iteratee) {
        return object && baseForRight(object, iteratee, keys);
      }
  
      /**
       * The base implementation of `_.functions` which creates an array of
       * `object` function property names filtered from `props`.
       *
       * @private
       * @param {Object} object The object to inspect.
       * @param {Array} props The property names to filter.
       * @returns {Array} Returns the function names.
       */
      function baseFunctions(object, props) {
        return arrayFilter(props, function(key) {
          return isFunction(object[key]);
        });
      }
  
      /**
       * The base implementation of `_.get` without support for default values.
       *
       * @private
       * @param {Object} object The object to query.
       * @param {Array|string} path The path of the property to get.
       * @returns {*} Returns the resolved value.
       */
      function baseGet(object, path) {
        path = castPath(path, object);
  
        var index = 0,
            length = path.length;
  
        while (object != null && index < length) {
          object = object[toKey(path[index++])];
        }
        return (index && index == length) ? object : undefined;
      }
  
      /**
       * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
       * `keysFunc` and `symbolsFunc` to get the enumerable property names and
       * symbols of `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @param {Function} keysFunc The function to get the keys of `object`.
       * @param {Function} symbolsFunc The function to get the symbols of `object`.
       * @returns {Array} Returns the array of property names and symbols.
       */
      function baseGetAllKeys(object, keysFunc, symbolsFunc) {
        var result = keysFunc(object);
        return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
      }
  
      /**
       * The base implementation of `getTag` without fallbacks for buggy environments.
       *
       * @private
       * @param {*} value The value to query.
       * @returns {string} Returns the `toStringTag`.
       */
      function baseGetTag(value) {
        if (value == null) {
          return value === undefined ? undefinedTag : nullTag;
        }
        return (symToStringTag && symToStringTag in Object(value))
          ? getRawTag(value)
          : objectToString(value);
      }
  
      /**
       * The base implementation of `_.gt` which doesn't coerce arguments.
       *
       * @private
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {boolean} Returns `true` if `value` is greater than `other`,
       *  else `false`.
       */
      function baseGt(value, other) {
        return value > other;
      }
  
      /**
       * The base implementation of `_.has` without support for deep paths.
       *
       * @private
       * @param {Object} [object] The object to query.
       * @param {Array|string} key The key to check.
       * @returns {boolean} Returns `true` if `key` exists, else `false`.
       */
      function baseHas(object, key) {
        return object != null && hasOwnProperty.call(object, key);
      }
  
      /**
       * The base implementation of `_.hasIn` without support for deep paths.
       *
       * @private
       * @param {Object} [object] The object to query.
       * @param {Array|string} key The key to check.
       * @returns {boolean} Returns `true` if `key` exists, else `false`.
       */
      function baseHasIn(object, key) {
        return object != null && key in Object(object);
      }
  
      /**
       * The base implementation of `_.inRange` which doesn't coerce arguments.
       *
       * @private
       * @param {number} number The number to check.
       * @param {number} start The start of the range.
       * @param {number} end The end of the range.
       * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
       */
      function baseInRange(number, start, end) {
        return number >= nativeMin(start, end) && number < nativeMax(start, end);
      }
  
      /**
       * The base implementation of methods like `_.intersection`, without support
       * for iteratee shorthands, that accepts an array of arrays to inspect.
       *
       * @private
       * @param {Array} arrays The arrays to inspect.
       * @param {Function} [iteratee] The iteratee invoked per element.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new array of shared values.
       */
      function baseIntersection(arrays, iteratee, comparator) {
        var includes = comparator ? arrayIncludesWith : arrayIncludes,
            length = arrays[0].length,
            othLength = arrays.length,
            othIndex = othLength,
            caches = Array(othLength),
            maxLength = Infinity,
            result = [];
  
        while (othIndex--) {
          var array = arrays[othIndex];
          if (othIndex && iteratee) {
            array = arrayMap(array, baseUnary(iteratee));
          }
          maxLength = nativeMin(array.length, maxLength);
          caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
            ? new SetCache(othIndex && array)
            : undefined;
        }
        array = arrays[0];
  
        var index = -1,
            seen = caches[0];
  
        outer:
        while (++index < length && result.length < maxLength) {
          var value = array[index],
              computed = iteratee ? iteratee(value) : value;
  
          value = (comparator || value !== 0) ? value : 0;
          if (!(seen
                ? cacheHas(seen, computed)
                : includes(result, computed, comparator)
              )) {
            othIndex = othLength;
            while (--othIndex) {
              var cache = caches[othIndex];
              if (!(cache
                    ? cacheHas(cache, computed)
                    : includes(arrays[othIndex], computed, comparator))
                  ) {
                continue outer;
              }
            }
            if (seen) {
              seen.push(computed);
            }
            result.push(value);
          }
        }
        return result;
      }
  
      /**
       * The base implementation of `_.invert` and `_.invertBy` which inverts
       * `object` with values transformed by `iteratee` and set by `setter`.
       *
       * @private
       * @param {Object} object The object to iterate over.
       * @param {Function} setter The function to set `accumulator` values.
       * @param {Function} iteratee The iteratee to transform values.
       * @param {Object} accumulator The initial inverted object.
       * @returns {Function} Returns `accumulator`.
       */
      function baseInverter(object, setter, iteratee, accumulator) {
        baseForOwn(object, function(value, key, object) {
          setter(accumulator, iteratee(value), key, object);
        });
        return accumulator;
      }
  
      /**
       * The base implementation of `_.invoke` without support for individual
       * method arguments.
       *
       * @private
       * @param {Object} object The object to query.
       * @param {Array|string} path The path of the method to invoke.
       * @param {Array} args The arguments to invoke the method with.
       * @returns {*} Returns the result of the invoked method.
       */
      function baseInvoke(object, path, args) {
        path = castPath(path, object);
        object = parent(object, path);
        var func = object == null ? object : object[toKey(last(path))];
        return func == null ? undefined : apply(func, object, args);
      }
  
      /**
       * The base implementation of `_.isArguments`.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an `arguments` object,
       */
      function baseIsArguments(value) {
        return isObjectLike(value) && baseGetTag(value) == argsTag;
      }
  
      /**
       * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
       */
      function baseIsArrayBuffer(value) {
        return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
      }
  
      /**
       * The base implementation of `_.isDate` without Node.js optimizations.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
       */
      function baseIsDate(value) {
        return isObjectLike(value) && baseGetTag(value) == dateTag;
      }
  
      /**
       * The base implementation of `_.isEqual` which supports partial comparisons
       * and tracks traversed objects.
       *
       * @private
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @param {boolean} bitmask The bitmask flags.
       *  1 - Unordered comparison
       *  2 - Partial comparison
       * @param {Function} [customizer] The function to customize comparisons.
       * @param {Object} [stack] Tracks traversed `value` and `other` objects.
       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
       */
      function baseIsEqual(value, other, bitmask, customizer, stack) {
        if (value === other) {
          return true;
        }
        if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
          return value !== value && other !== other;
        }
        return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
      }
  
      /**
       * A specialized version of `baseIsEqual` for arrays and objects which performs
       * deep comparisons and tracks traversed objects enabling objects with circular
       * references to be compared.
       *
       * @private
       * @param {Object} object The object to compare.
       * @param {Object} other The other object to compare.
       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
       * @param {Function} customizer The function to customize comparisons.
       * @param {Function} equalFunc The function to determine equivalents of values.
       * @param {Object} [stack] Tracks traversed `object` and `other` objects.
       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
       */
      function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
        var objIsArr = isArray(object),
            othIsArr = isArray(other),
            objTag = objIsArr ? arrayTag : getTag(object),
            othTag = othIsArr ? arrayTag : getTag(other);
  
        objTag = objTag == argsTag ? objectTag : objTag;
        othTag = othTag == argsTag ? objectTag : othTag;
  
        var objIsObj = objTag == objectTag,
            othIsObj = othTag == objectTag,
            isSameTag = objTag == othTag;
  
        if (isSameTag && isBuffer(object)) {
          if (!isBuffer(other)) {
            return false;
          }
          objIsArr = true;
          objIsObj = false;
        }
        if (isSameTag && !objIsObj) {
          stack || (stack = new Stack);
          return (objIsArr || isTypedArray(object))
            ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
            : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
        }
        if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
          var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
              othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
  
          if (objIsWrapped || othIsWrapped) {
            var objUnwrapped = objIsWrapped ? object.value() : object,
                othUnwrapped = othIsWrapped ? other.value() : other;
  
            stack || (stack = new Stack);
            return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
          }
        }
        if (!isSameTag) {
          return false;
        }
        stack || (stack = new Stack);
        return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
      }
  
      /**
       * The base implementation of `_.isMap` without Node.js optimizations.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a map, else `false`.
       */
      function baseIsMap(value) {
        return isObjectLike(value) && getTag(value) == mapTag;
      }
  
      /**
       * The base implementation of `_.isMatch` without support for iteratee shorthands.
       *
       * @private
       * @param {Object} object The object to inspect.
       * @param {Object} source The object of property values to match.
       * @param {Array} matchData The property names, values, and compare flags to match.
       * @param {Function} [customizer] The function to customize comparisons.
       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
       */
      function baseIsMatch(object, source, matchData, customizer) {
        var index = matchData.length,
            length = index,
            noCustomizer = !customizer;
  
        if (object == null) {
          return !length;
        }
        object = Object(object);
        while (index--) {
          var data = matchData[index];
          if ((noCustomizer && data[2])
                ? data[1] !== object[data[0]]
                : !(data[0] in object)
              ) {
            return false;
          }
        }
        while (++index < length) {
          data = matchData[index];
          var key = data[0],
              objValue = object[key],
              srcValue = data[1];
  
          if (noCustomizer && data[2]) {
            if (objValue === undefined && !(key in object)) {
              return false;
            }
          } else {
            var stack = new Stack;
            if (customizer) {
              var result = customizer(objValue, srcValue, key, object, source, stack);
            }
            if (!(result === undefined
                  ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
                  : result
                )) {
              return false;
            }
          }
        }
        return true;
      }
  
      /**
       * The base implementation of `_.isNative` without bad shim checks.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a native function,
       *  else `false`.
       */
      function baseIsNative(value) {
        if (!isObject(value) || isMasked(value)) {
          return false;
        }
        var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
        return pattern.test(toSource(value));
      }
  
      /**
       * The base implementation of `_.isRegExp` without Node.js optimizations.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
       */
      function baseIsRegExp(value) {
        return isObjectLike(value) && baseGetTag(value) == regexpTag;
      }
  
      /**
       * The base implementation of `_.isSet` without Node.js optimizations.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a set, else `false`.
       */
      function baseIsSet(value) {
        return isObjectLike(value) && getTag(value) == setTag;
      }
  
      /**
       * The base implementation of `_.isTypedArray` without Node.js optimizations.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
       */
      function baseIsTypedArray(value) {
        return isObjectLike(value) &&
          isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
      }
  
      /**
       * The base implementation of `_.iteratee`.
       *
       * @private
       * @param {*} [value=_.identity] The value to convert to an iteratee.
       * @returns {Function} Returns the iteratee.
       */
      function baseIteratee(value) {
        // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
        // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
        if (typeof value == 'function') {
          return value;
        }
        if (value == null) {
          return identity;
        }
        if (typeof value == 'object') {
          return isArray(value)
            ? baseMatchesProperty(value[0], value[1])
            : baseMatches(value);
        }
        return property(value);
      }
  
      /**
       * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
       *
       * @private
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property names.
       */
      function baseKeys(object) {
        if (!isPrototype(object)) {
          return nativeKeys(object);
        }
        var result = [];
        for (var key in Object(object)) {
          if (hasOwnProperty.call(object, key) && key != 'constructor') {
            result.push(key);
          }
        }
        return result;
      }
  
      /**
       * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
       *
       * @private
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property names.
       */
      function baseKeysIn(object) {
        if (!isObject(object)) {
          return nativeKeysIn(object);
        }
        var isProto = isPrototype(object),
            result = [];
  
        for (var key in object) {
          if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
            result.push(key);
          }
        }
        return result;
      }
  
      /**
       * The base implementation of `_.lt` which doesn't coerce arguments.
       *
       * @private
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {boolean} Returns `true` if `value` is less than `other`,
       *  else `false`.
       */
      function baseLt(value, other) {
        return value < other;
      }
  
      /**
       * The base implementation of `_.map` without support for iteratee shorthands.
       *
       * @private
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} iteratee The function invoked per iteration.
       * @returns {Array} Returns the new mapped array.
       */
      function baseMap(collection, iteratee) {
        var index = -1,
            result = isArrayLike(collection) ? Array(collection.length) : [];
  
        baseEach(collection, function(value, key, collection) {
          result[++index] = iteratee(value, key, collection);
        });
        return result;
      }
  
      /**
       * The base implementation of `_.matches` which doesn't clone `source`.
       *
       * @private
       * @param {Object} source The object of property values to match.
       * @returns {Function} Returns the new spec function.
       */
      function baseMatches(source) {
        var matchData = getMatchData(source);
        if (matchData.length == 1 && matchData[0][2]) {
          return matchesStrictComparable(matchData[0][0], matchData[0][1]);
        }
        return function(object) {
          return object === source || baseIsMatch(object, source, matchData);
        };
      }
  
      /**
       * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
       *
       * @private
       * @param {string} path The path of the property to get.
       * @param {*} srcValue The value to match.
       * @returns {Function} Returns the new spec function.
       */
      function baseMatchesProperty(path, srcValue) {
        if (isKey(path) && isStrictComparable(srcValue)) {
          return matchesStrictComparable(toKey(path), srcValue);
        }
        return function(object) {
          var objValue = get(object, path);
          return (objValue === undefined && objValue === srcValue)
            ? hasIn(object, path)
            : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
        };
      }
  
      /**
       * The base implementation of `_.merge` without support for multiple sources.
       *
       * @private
       * @param {Object} object The destination object.
       * @param {Object} source The source object.
       * @param {number} srcIndex The index of `source`.
       * @param {Function} [customizer] The function to customize merged values.
       * @param {Object} [stack] Tracks traversed source values and their merged
       *  counterparts.
       */
      function baseMerge(object, source, srcIndex, customizer, stack) {
        if (object === source) {
          return;
        }
        baseFor(source, function(srcValue, key) {
          if (isObject(srcValue)) {
            stack || (stack = new Stack);
            baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
          }
          else {
            var newValue = customizer
              ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
              : undefined;
  
            if (newValue === undefined) {
              newValue = srcValue;
            }
            assignMergeValue(object, key, newValue);
          }
        }, keysIn);
      }
  
      /**
       * A specialized version of `baseMerge` for arrays and objects which performs
       * deep merges and tracks traversed objects enabling objects with circular
       * references to be merged.
       *
       * @private
       * @param {Object} object The destination object.
       * @param {Object} source The source object.
       * @param {string} key The key of the value to merge.
       * @param {number} srcIndex The index of `source`.
       * @param {Function} mergeFunc The function to merge values.
       * @param {Function} [customizer] The function to customize assigned values.
       * @param {Object} [stack] Tracks traversed source values and their merged
       *  counterparts.
       */
      function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
        var objValue = safeGet(object, key),
            srcValue = safeGet(source, key),
            stacked = stack.get(srcValue);
  
        if (stacked) {
          assignMergeValue(object, key, stacked);
          return;
        }
        var newValue = customizer
          ? customizer(objValue, srcValue, (key + ''), object, source, stack)
          : undefined;
  
        var isCommon = newValue === undefined;
  
        if (isCommon) {
          var isArr = isArray(srcValue),
              isBuff = !isArr && isBuffer(srcValue),
              isTyped = !isArr && !isBuff && isTypedArray(srcValue);
  
          newValue = srcValue;
          if (isArr || isBuff || isTyped) {
            if (isArray(objValue)) {
              newValue = objValue;
            }
            else if (isArrayLikeObject(objValue)) {
              newValue = copyArray(objValue);
            }
            else if (isBuff) {
              isCommon = false;
              newValue = cloneBuffer(srcValue, true);
            }
            else if (isTyped) {
              isCommon = false;
              newValue = cloneTypedArray(srcValue, true);
            }
            else {
              newValue = [];
            }
          }
          else if (isPlainObject(srcValue) || isArguments(srcValue)) {
            newValue = objValue;
            if (isArguments(objValue)) {
              newValue = toPlainObject(objValue);
            }
            else if (!isObject(objValue) || isFunction(objValue)) {
              newValue = initCloneObject(srcValue);
            }
          }
          else {
            isCommon = false;
          }
        }
        if (isCommon) {
          // Recursively merge objects and arrays (susceptible to call stack limits).
          stack.set(srcValue, newValue);
          mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
          stack['delete'](srcValue);
        }
        assignMergeValue(object, key, newValue);
      }
  
      /**
       * The base implementation of `_.nth` which doesn't coerce arguments.
       *
       * @private
       * @param {Array} array The array to query.
       * @param {number} n The index of the element to return.
       * @returns {*} Returns the nth element of `array`.
       */
      function baseNth(array, n) {
        var length = array.length;
        if (!length) {
          return;
        }
        n += n < 0 ? length : 0;
        return isIndex(n, length) ? array[n] : undefined;
      }
  
      /**
       * The base implementation of `_.orderBy` without param guards.
       *
       * @private
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
       * @param {string[]} orders The sort orders of `iteratees`.
       * @returns {Array} Returns the new sorted array.
       */
      function baseOrderBy(collection, iteratees, orders) {
        var index = -1;
        iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));
  
        var result = baseMap(collection, function(value, key, collection) {
          var criteria = arrayMap(iteratees, function(iteratee) {
            return iteratee(value);
          });
          return { 'criteria': criteria, 'index': ++index, 'value': value };
        });
  
        return baseSortBy(result, function(object, other) {
          return compareMultiple(object, other, orders);
        });
      }
  
      /**
       * The base implementation of `_.pick` without support for individual
       * property identifiers.
       *
       * @private
       * @param {Object} object The source object.
       * @param {string[]} paths The property paths to pick.
       * @returns {Object} Returns the new object.
       */
      function basePick(object, paths) {
        return basePickBy(object, paths, function(value, path) {
          return hasIn(object, path);
        });
      }
  
      /**
       * The base implementation of  `_.pickBy` without support for iteratee shorthands.
       *
       * @private
       * @param {Object} object The source object.
       * @param {string[]} paths The property paths to pick.
       * @param {Function} predicate The function invoked per property.
       * @returns {Object} Returns the new object.
       */
      function basePickBy(object, paths, predicate) {
        var index = -1,
            length = paths.length,
            result = {};
  
        while (++index < length) {
          var path = paths[index],
              value = baseGet(object, path);
  
          if (predicate(value, path)) {
            baseSet(result, castPath(path, object), value);
          }
        }
        return result;
      }
  
      /**
       * A specialized version of `baseProperty` which supports deep paths.
       *
       * @private
       * @param {Array|string} path The path of the property to get.
       * @returns {Function} Returns the new accessor function.
       */
      function basePropertyDeep(path) {
        return function(object) {
          return baseGet(object, path);
        };
      }
  
      /**
       * The base implementation of `_.pullAllBy` without support for iteratee
       * shorthands.
       *
       * @private
       * @param {Array} array The array to modify.
       * @param {Array} values The values to remove.
       * @param {Function} [iteratee] The iteratee invoked per element.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns `array`.
       */
      function basePullAll(array, values, iteratee, comparator) {
        var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
            index = -1,
            length = values.length,
            seen = array;
  
        if (array === values) {
          values = copyArray(values);
        }
        if (iteratee) {
          seen = arrayMap(array, baseUnary(iteratee));
        }
        while (++index < length) {
          var fromIndex = 0,
              value = values[index],
              computed = iteratee ? iteratee(value) : value;
  
          while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
            if (seen !== array) {
              splice.call(seen, fromIndex, 1);
            }
            splice.call(array, fromIndex, 1);
          }
        }
        return array;
      }
  
      /**
       * The base implementation of `_.pullAt` without support for individual
       * indexes or capturing the removed elements.
       *
       * @private
       * @param {Array} array The array to modify.
       * @param {number[]} indexes The indexes of elements to remove.
       * @returns {Array} Returns `array`.
       */
      function basePullAt(array, indexes) {
        var length = array ? indexes.length : 0,
            lastIndex = length - 1;
  
        while (length--) {
          var index = indexes[length];
          if (length == lastIndex || index !== previous) {
            var previous = index;
            if (isIndex(index)) {
              splice.call(array, index, 1);
            } else {
              baseUnset(array, index);
            }
          }
        }
        return array;
      }
  
      /**
       * The base implementation of `_.random` without support for returning
       * floating-point numbers.
       *
       * @private
       * @param {number} lower The lower bound.
       * @param {number} upper The upper bound.
       * @returns {number} Returns the random number.
       */
      function baseRandom(lower, upper) {
        return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
      }
  
      /**
       * The base implementation of `_.range` and `_.rangeRight` which doesn't
       * coerce arguments.
       *
       * @private
       * @param {number} start The start of the range.
       * @param {number} end The end of the range.
       * @param {number} step The value to increment or decrement by.
       * @param {boolean} [fromRight] Specify iterating from right to left.
       * @returns {Array} Returns the range of numbers.
       */
      function baseRange(start, end, step, fromRight) {
        var index = -1,
            length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
            result = Array(length);
  
        while (length--) {
          result[fromRight ? length : ++index] = start;
          start += step;
        }
        return result;
      }
  
      /**
       * The base implementation of `_.repeat` which doesn't coerce arguments.
       *
       * @private
       * @param {string} string The string to repeat.
       * @param {number} n The number of times to repeat the string.
       * @returns {string} Returns the repeated string.
       */
      function baseRepeat(string, n) {
        var result = '';
        if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
          return result;
        }
        // Leverage the exponentiation by squaring algorithm for a faster repeat.
        // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
        do {
          if (n % 2) {
            result += string;
          }
          n = nativeFloor(n / 2);
          if (n) {
            string += string;
          }
        } while (n);
  
        return result;
      }
  
      /**
       * The base implementation of `_.rest` which doesn't validate or coerce arguments.
       *
       * @private
       * @param {Function} func The function to apply a rest parameter to.
       * @param {number} [start=func.length-1] The start position of the rest parameter.
       * @returns {Function} Returns the new function.
       */
      function baseRest(func, start) {
        return setToString(overRest(func, start, identity), func + '');
      }
  
      /**
       * The base implementation of `_.sample`.
       *
       * @private
       * @param {Array|Object} collection The collection to sample.
       * @returns {*} Returns the random element.
       */
      function baseSample(collection) {
        return arraySample(values(collection));
      }
  
      /**
       * The base implementation of `_.sampleSize` without param guards.
       *
       * @private
       * @param {Array|Object} collection The collection to sample.
       * @param {number} n The number of elements to sample.
       * @returns {Array} Returns the random elements.
       */
      function baseSampleSize(collection, n) {
        var array = values(collection);
        return shuffleSelf(array, baseClamp(n, 0, array.length));
      }
  
      /**
       * The base implementation of `_.set`.
       *
       * @private
       * @param {Object} object The object to modify.
       * @param {Array|string} path The path of the property to set.
       * @param {*} value The value to set.
       * @param {Function} [customizer] The function to customize path creation.
       * @returns {Object} Returns `object`.
       */
      function baseSet(object, path, value, customizer) {
        if (!isObject(object)) {
          return object;
        }
        path = castPath(path, object);
  
        var index = -1,
            length = path.length,
            lastIndex = length - 1,
            nested = object;
  
        while (nested != null && ++index < length) {
          var key = toKey(path[index]),
              newValue = value;
  
          if (index != lastIndex) {
            var objValue = nested[key];
            newValue = customizer ? customizer(objValue, key, nested) : undefined;
            if (newValue === undefined) {
              newValue = isObject(objValue)
                ? objValue
                : (isIndex(path[index + 1]) ? [] : {});
            }
          }
          assignValue(nested, key, newValue);
          nested = nested[key];
        }
        return object;
      }
  
      /**
       * The base implementation of `setData` without support for hot loop shorting.
       *
       * @private
       * @param {Function} func The function to associate metadata with.
       * @param {*} data The metadata.
       * @returns {Function} Returns `func`.
       */
      var baseSetData = !metaMap ? identity : function(func, data) {
        metaMap.set(func, data);
        return func;
      };
  
      /**
       * The base implementation of `setToString` without support for hot loop shorting.
       *
       * @private
       * @param {Function} func The function to modify.
       * @param {Function} string The `toString` result.
       * @returns {Function} Returns `func`.
       */
      var baseSetToString = !defineProperty ? identity : function(func, string) {
        return defineProperty(func, 'toString', {
          'configurable': true,
          'enumerable': false,
          'value': constant(string),
          'writable': true
        });
      };
  
      /**
       * The base implementation of `_.shuffle`.
       *
       * @private
       * @param {Array|Object} collection The collection to shuffle.
       * @returns {Array} Returns the new shuffled array.
       */
      function baseShuffle(collection) {
        return shuffleSelf(values(collection));
      }
  
      /**
       * The base implementation of `_.slice` without an iteratee call guard.
       *
       * @private
       * @param {Array} array The array to slice.
       * @param {number} [start=0] The start position.
       * @param {number} [end=array.length] The end position.
       * @returns {Array} Returns the slice of `array`.
       */
      function baseSlice(array, start, end) {
        var index = -1,
            length = array.length;
  
        if (start < 0) {
          start = -start > length ? 0 : (length + start);
        }
        end = end > length ? length : end;
        if (end < 0) {
          end += length;
        }
        length = start > end ? 0 : ((end - start) >>> 0);
        start >>>= 0;
  
        var result = Array(length);
        while (++index < length) {
          result[index] = array[index + start];
        }
        return result;
      }
  
      /**
       * The base implementation of `_.some` without support for iteratee shorthands.
       *
       * @private
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} predicate The function invoked per iteration.
       * @returns {boolean} Returns `true` if any element passes the predicate check,
       *  else `false`.
       */
      function baseSome(collection, predicate) {
        var result;
  
        baseEach(collection, function(value, index, collection) {
          result = predicate(value, index, collection);
          return !result;
        });
        return !!result;
      }
  
      /**
       * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
       * performs a binary search of `array` to determine the index at which `value`
       * should be inserted into `array` in order to maintain its sort order.
       *
       * @private
       * @param {Array} array The sorted array to inspect.
       * @param {*} value The value to evaluate.
       * @param {boolean} [retHighest] Specify returning the highest qualified index.
       * @returns {number} Returns the index at which `value` should be inserted
       *  into `array`.
       */
      function baseSortedIndex(array, value, retHighest) {
        var low = 0,
            high = array == null ? low : array.length;
  
        if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
          while (low < high) {
            var mid = (low + high) >>> 1,
                computed = array[mid];
  
            if (computed !== null && !isSymbol(computed) &&
                (retHighest ? (computed <= value) : (computed < value))) {
              low = mid + 1;
            } else {
              high = mid;
            }
          }
          return high;
        }
        return baseSortedIndexBy(array, value, identity, retHighest);
      }
  
      /**
       * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
       * which invokes `iteratee` for `value` and each element of `array` to compute
       * their sort ranking. The iteratee is invoked with one argument; (value).
       *
       * @private
       * @param {Array} array The sorted array to inspect.
       * @param {*} value The value to evaluate.
       * @param {Function} iteratee The iteratee invoked per element.
       * @param {boolean} [retHighest] Specify returning the highest qualified index.
       * @returns {number} Returns the index at which `value` should be inserted
       *  into `array`.
       */
      function baseSortedIndexBy(array, value, iteratee, retHighest) {
        value = iteratee(value);
  
        var low = 0,
            high = array == null ? 0 : array.length,
            valIsNaN = value !== value,
            valIsNull = value === null,
            valIsSymbol = isSymbol(value),
            valIsUndefined = value === undefined;
  
        while (low < high) {
          var mid = nativeFloor((low + high) / 2),
              computed = iteratee(array[mid]),
              othIsDefined = computed !== undefined,
              othIsNull = computed === null,
              othIsReflexive = computed === computed,
              othIsSymbol = isSymbol(computed);
  
          if (valIsNaN) {
            var setLow = retHighest || othIsReflexive;
          } else if (valIsUndefined) {
            setLow = othIsReflexive && (retHighest || othIsDefined);
          } else if (valIsNull) {
            setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
          } else if (valIsSymbol) {
            setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
          } else if (othIsNull || othIsSymbol) {
            setLow = false;
          } else {
            setLow = retHighest ? (computed <= value) : (computed < value);
          }
          if (setLow) {
            low = mid + 1;
          } else {
            high = mid;
          }
        }
        return nativeMin(high, MAX_ARRAY_INDEX);
      }
  
      /**
       * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
       * support for iteratee shorthands.
       *
       * @private
       * @param {Array} array The array to inspect.
       * @param {Function} [iteratee] The iteratee invoked per element.
       * @returns {Array} Returns the new duplicate free array.
       */
      function baseSortedUniq(array, iteratee) {
        var index = -1,
            length = array.length,
            resIndex = 0,
            result = [];
  
        while (++index < length) {
          var value = array[index],
              computed = iteratee ? iteratee(value) : value;
  
          if (!index || !eq(computed, seen)) {
            var seen = computed;
            result[resIndex++] = value === 0 ? 0 : value;
          }
        }
        return result;
      }
  
      /**
       * The base implementation of `_.toNumber` which doesn't ensure correct
       * conversions of binary, hexadecimal, or octal string values.
       *
       * @private
       * @param {*} value The value to process.
       * @returns {number} Returns the number.
       */
      function baseToNumber(value) {
        if (typeof value == 'number') {
          return value;
        }
        if (isSymbol(value)) {
          return NAN;
        }
        return +value;
      }
  
      /**
       * The base implementation of `_.toString` which doesn't convert nullish
       * values to empty strings.
       *
       * @private
       * @param {*} value The value to process.
       * @returns {string} Returns the string.
       */
      function baseToString(value) {
        // Exit early for strings to avoid a performance hit in some environments.
        if (typeof value == 'string') {
          return value;
        }
        if (isArray(value)) {
          // Recursively convert values (susceptible to call stack limits).
          return arrayMap(value, baseToString) + '';
        }
        if (isSymbol(value)) {
          return symbolToString ? symbolToString.call(value) : '';
        }
        var result = (value + '');
        return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
      }
  
      /**
       * The base implementation of `_.uniqBy` without support for iteratee shorthands.
       *
       * @private
       * @param {Array} array The array to inspect.
       * @param {Function} [iteratee] The iteratee invoked per element.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new duplicate free array.
       */
      function baseUniq(array, iteratee, comparator) {
        var index = -1,
            includes = arrayIncludes,
            length = array.length,
            isCommon = true,
            result = [],
            seen = result;
  
        if (comparator) {
          isCommon = false;
          includes = arrayIncludesWith;
        }
        else if (length >= LARGE_ARRAY_SIZE) {
          var set = iteratee ? null : createSet(array);
          if (set) {
            return setToArray(set);
          }
          isCommon = false;
          includes = cacheHas;
          seen = new SetCache;
        }
        else {
          seen = iteratee ? [] : result;
        }
        outer:
        while (++index < length) {
          var value = array[index],
              computed = iteratee ? iteratee(value) : value;
  
          value = (comparator || value !== 0) ? value : 0;
          if (isCommon && computed === computed) {
            var seenIndex = seen.length;
            while (seenIndex--) {
              if (seen[seenIndex] === computed) {
                continue outer;
              }
            }
            if (iteratee) {
              seen.push(computed);
            }
            result.push(value);
          }
          else if (!includes(seen, computed, comparator)) {
            if (seen !== result) {
              seen.push(computed);
            }
            result.push(value);
          }
        }
        return result;
      }
  
      /**
       * The base implementation of `_.unset`.
       *
       * @private
       * @param {Object} object The object to modify.
       * @param {Array|string} path The property path to unset.
       * @returns {boolean} Returns `true` if the property is deleted, else `false`.
       */
      function baseUnset(object, path) {
        path = castPath(path, object);
        object = parent(object, path);
        return object == null || delete object[toKey(last(path))];
      }
  
      /**
       * The base implementation of `_.update`.
       *
       * @private
       * @param {Object} object The object to modify.
       * @param {Array|string} path The path of the property to update.
       * @param {Function} updater The function to produce the updated value.
       * @param {Function} [customizer] The function to customize path creation.
       * @returns {Object} Returns `object`.
       */
      function baseUpdate(object, path, updater, customizer) {
        return baseSet(object, path, updater(baseGet(object, path)), customizer);
      }
  
      /**
       * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
       * without support for iteratee shorthands.
       *
       * @private
       * @param {Array} array The array to query.
       * @param {Function} predicate The function invoked per iteration.
       * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
       * @param {boolean} [fromRight] Specify iterating from right to left.
       * @returns {Array} Returns the slice of `array`.
       */
      function baseWhile(array, predicate, isDrop, fromRight) {
        var length = array.length,
            index = fromRight ? length : -1;
  
        while ((fromRight ? index-- : ++index < length) &&
          predicate(array[index], index, array)) {}
  
        return isDrop
          ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
          : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
      }
  
      /**
       * The base implementation of `wrapperValue` which returns the result of
       * performing a sequence of actions on the unwrapped `value`, where each
       * successive action is supplied the return value of the previous.
       *
       * @private
       * @param {*} value The unwrapped value.
       * @param {Array} actions Actions to perform to resolve the unwrapped value.
       * @returns {*} Returns the resolved value.
       */
      function baseWrapperValue(value, actions) {
        var result = value;
        if (result instanceof LazyWrapper) {
          result = result.value();
        }
        return arrayReduce(actions, function(result, action) {
          return action.func.apply(action.thisArg, arrayPush([result], action.args));
        }, result);
      }
  
      /**
       * The base implementation of methods like `_.xor`, without support for
       * iteratee shorthands, that accepts an array of arrays to inspect.
       *
       * @private
       * @param {Array} arrays The arrays to inspect.
       * @param {Function} [iteratee] The iteratee invoked per element.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new array of values.
       */
      function baseXor(arrays, iteratee, comparator) {
        var length = arrays.length;
        if (length < 2) {
          return length ? baseUniq(arrays[0]) : [];
        }
        var index = -1,
            result = Array(length);
  
        while (++index < length) {
          var array = arrays[index],
              othIndex = -1;
  
          while (++othIndex < length) {
            if (othIndex != index) {
              result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
            }
          }
        }
        return baseUniq(baseFlatten(result, 1), iteratee, comparator);
      }
  
      /**
       * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
       *
       * @private
       * @param {Array} props The property identifiers.
       * @param {Array} values The property values.
       * @param {Function} assignFunc The function to assign values.
       * @returns {Object} Returns the new object.
       */
      function baseZipObject(props, values, assignFunc) {
        var index = -1,
            length = props.length,
            valsLength = values.length,
            result = {};
  
        while (++index < length) {
          var value = index < valsLength ? values[index] : undefined;
          assignFunc(result, props[index], value);
        }
        return result;
      }
  
      /**
       * Casts `value` to an empty array if it's not an array like object.
       *
       * @private
       * @param {*} value The value to inspect.
       * @returns {Array|Object} Returns the cast array-like object.
       */
      function castArrayLikeObject(value) {
        return isArrayLikeObject(value) ? value : [];
      }
  
      /**
       * Casts `value` to `identity` if it's not a function.
       *
       * @private
       * @param {*} value The value to inspect.
       * @returns {Function} Returns cast function.
       */
      function castFunction(value) {
        return typeof value == 'function' ? value : identity;
      }
  
      /**
       * Casts `value` to a path array if it's not one.
       *
       * @private
       * @param {*} value The value to inspect.
       * @param {Object} [object] The object to query keys on.
       * @returns {Array} Returns the cast property path array.
       */
      function castPath(value, object) {
        if (isArray(value)) {
          return value;
        }
        return isKey(value, object) ? [value] : stringToPath(toString(value));
      }
  
      /**
       * A `baseRest` alias which can be replaced with `identity` by module
       * replacement plugins.
       *
       * @private
       * @type {Function}
       * @param {Function} func The function to apply a rest parameter to.
       * @returns {Function} Returns the new function.
       */
      var castRest = baseRest;
  
      /**
       * Casts `array` to a slice if it's needed.
       *
       * @private
       * @param {Array} array The array to inspect.
       * @param {number} start The start position.
       * @param {number} [end=array.length] The end position.
       * @returns {Array} Returns the cast slice.
       */
      function castSlice(array, start, end) {
        var length = array.length;
        end = end === undefined ? length : end;
        return (!start && end >= length) ? array : baseSlice(array, start, end);
      }
  
      /**
       * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
       *
       * @private
       * @param {number|Object} id The timer id or timeout object of the timer to clear.
       */
      var clearTimeout = ctxClearTimeout || function(id) {
        return root.clearTimeout(id);
      };
  
      /**
       * Creates a clone of  `buffer`.
       *
       * @private
       * @param {Buffer} buffer The buffer to clone.
       * @param {boolean} [isDeep] Specify a deep clone.
       * @returns {Buffer} Returns the cloned buffer.
       */
      function cloneBuffer(buffer, isDeep) {
        if (isDeep) {
          return buffer.slice();
        }
        var length = buffer.length,
            result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
  
        buffer.copy(result);
        return result;
      }
  
      /**
       * Creates a clone of `arrayBuffer`.
       *
       * @private
       * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
       * @returns {ArrayBuffer} Returns the cloned array buffer.
       */
      function cloneArrayBuffer(arrayBuffer) {
        var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
        new Uint8Array(result).set(new Uint8Array(arrayBuffer));
        return result;
      }
  
      /**
       * Creates a clone of `dataView`.
       *
       * @private
       * @param {Object} dataView The data view to clone.
       * @param {boolean} [isDeep] Specify a deep clone.
       * @returns {Object} Returns the cloned data view.
       */
      function cloneDataView(dataView, isDeep) {
        var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
        return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
      }
  
      /**
       * Creates a clone of `regexp`.
       *
       * @private
       * @param {Object} regexp The regexp to clone.
       * @returns {Object} Returns the cloned regexp.
       */
      function cloneRegExp(regexp) {
        var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
        result.lastIndex = regexp.lastIndex;
        return result;
      }
  
      /**
       * Creates a clone of the `symbol` object.
       *
       * @private
       * @param {Object} symbol The symbol object to clone.
       * @returns {Object} Returns the cloned symbol object.
       */
      function cloneSymbol(symbol) {
        return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
      }
  
      /**
       * Creates a clone of `typedArray`.
       *
       * @private
       * @param {Object} typedArray The typed array to clone.
       * @param {boolean} [isDeep] Specify a deep clone.
       * @returns {Object} Returns the cloned typed array.
       */
      function cloneTypedArray(typedArray, isDeep) {
        var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
        return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
      }
  
      /**
       * Compares values to sort them in ascending order.
       *
       * @private
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {number} Returns the sort order indicator for `value`.
       */
      function compareAscending(value, other) {
        if (value !== other) {
          var valIsDefined = value !== undefined,
              valIsNull = value === null,
              valIsReflexive = value === value,
              valIsSymbol = isSymbol(value);
  
          var othIsDefined = other !== undefined,
              othIsNull = other === null,
              othIsReflexive = other === other,
              othIsSymbol = isSymbol(other);
  
          if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
              (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
              (valIsNull && othIsDefined && othIsReflexive) ||
              (!valIsDefined && othIsReflexive) ||
              !valIsReflexive) {
            return 1;
          }
          if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
              (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
              (othIsNull && valIsDefined && valIsReflexive) ||
              (!othIsDefined && valIsReflexive) ||
              !othIsReflexive) {
            return -1;
          }
        }
        return 0;
      }
  
      /**
       * Used by `_.orderBy` to compare multiple properties of a value to another
       * and stable sort them.
       *
       * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
       * specify an order of "desc" for descending or "asc" for ascending sort order
       * of corresponding values.
       *
       * @private
       * @param {Object} object The object to compare.
       * @param {Object} other The other object to compare.
       * @param {boolean[]|string[]} orders The order to sort by for each property.
       * @returns {number} Returns the sort order indicator for `object`.
       */
      function compareMultiple(object, other, orders) {
        var index = -1,
            objCriteria = object.criteria,
            othCriteria = other.criteria,
            length = objCriteria.length,
            ordersLength = orders.length;
  
        while (++index < length) {
          var result = compareAscending(objCriteria[index], othCriteria[index]);
          if (result) {
            if (index >= ordersLength) {
              return result;
            }
            var order = orders[index];
            return result * (order == 'desc' ? -1 : 1);
          }
        }
        // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
        // that causes it, under certain circumstances, to provide the same value for
        // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
        // for more details.
        //
        // This also ensures a stable sort in V8 and other engines.
        // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
        return object.index - other.index;
      }
  
      /**
       * Creates an array that is the composition of partially applied arguments,
       * placeholders, and provided arguments into a single array of arguments.
       *
       * @private
       * @param {Array} args The provided arguments.
       * @param {Array} partials The arguments to prepend to those provided.
       * @param {Array} holders The `partials` placeholder indexes.
       * @params {boolean} [isCurried] Specify composing for a curried function.
       * @returns {Array} Returns the new array of composed arguments.
       */
      function composeArgs(args, partials, holders, isCurried) {
        var argsIndex = -1,
            argsLength = args.length,
            holdersLength = holders.length,
            leftIndex = -1,
            leftLength = partials.length,
            rangeLength = nativeMax(argsLength - holdersLength, 0),
            result = Array(leftLength + rangeLength),
            isUncurried = !isCurried;
  
        while (++leftIndex < leftLength) {
          result[leftIndex] = partials[leftIndex];
        }
        while (++argsIndex < holdersLength) {
          if (isUncurried || argsIndex < argsLength) {
            result[holders[argsIndex]] = args[argsIndex];
          }
        }
        while (rangeLength--) {
          result[leftIndex++] = args[argsIndex++];
        }
        return result;
      }
  
      /**
       * This function is like `composeArgs` except that the arguments composition
       * is tailored for `_.partialRight`.
       *
       * @private
       * @param {Array} args The provided arguments.
       * @param {Array} partials The arguments to append to those provided.
       * @param {Array} holders The `partials` placeholder indexes.
       * @params {boolean} [isCurried] Specify composing for a curried function.
       * @returns {Array} Returns the new array of composed arguments.
       */
      function composeArgsRight(args, partials, holders, isCurried) {
        var argsIndex = -1,
            argsLength = args.length,
            holdersIndex = -1,
            holdersLength = holders.length,
            rightIndex = -1,
            rightLength = partials.length,
            rangeLength = nativeMax(argsLength - holdersLength, 0),
            result = Array(rangeLength + rightLength),
            isUncurried = !isCurried;
  
        while (++argsIndex < rangeLength) {
          result[argsIndex] = args[argsIndex];
        }
        var offset = argsIndex;
        while (++rightIndex < rightLength) {
          result[offset + rightIndex] = partials[rightIndex];
        }
        while (++holdersIndex < holdersLength) {
          if (isUncurried || argsIndex < argsLength) {
            result[offset + holders[holdersIndex]] = args[argsIndex++];
          }
        }
        return result;
      }
  
      /**
       * Copies the values of `source` to `array`.
       *
       * @private
       * @param {Array} source The array to copy values from.
       * @param {Array} [array=[]] The array to copy values to.
       * @returns {Array} Returns `array`.
       */
      function copyArray(source, array) {
        var index = -1,
            length = source.length;
  
        array || (array = Array(length));
        while (++index < length) {
          array[index] = source[index];
        }
        return array;
      }
  
      /**
       * Copies properties of `source` to `object`.
       *
       * @private
       * @param {Object} source The object to copy properties from.
       * @param {Array} props The property identifiers to copy.
       * @param {Object} [object={}] The object to copy properties to.
       * @param {Function} [customizer] The function to customize copied values.
       * @returns {Object} Returns `object`.
       */
      function copyObject(source, props, object, customizer) {
        var isNew = !object;
        object || (object = {});
  
        var index = -1,
            length = props.length;
  
        while (++index < length) {
          var key = props[index];
  
          var newValue = customizer
            ? customizer(object[key], source[key], key, object, source)
            : undefined;
  
          if (newValue === undefined) {
            newValue = source[key];
          }
          if (isNew) {
            baseAssignValue(object, key, newValue);
          } else {
            assignValue(object, key, newValue);
          }
        }
        return object;
      }
  
      /**
       * Copies own symbols of `source` to `object`.
       *
       * @private
       * @param {Object} source The object to copy symbols from.
       * @param {Object} [object={}] The object to copy symbols to.
       * @returns {Object} Returns `object`.
       */
      function copySymbols(source, object) {
        return copyObject(source, getSymbols(source), object);
      }
  
      /**
       * Copies own and inherited symbols of `source` to `object`.
       *
       * @private
       * @param {Object} source The object to copy symbols from.
       * @param {Object} [object={}] The object to copy symbols to.
       * @returns {Object} Returns `object`.
       */
      function copySymbolsIn(source, object) {
        return copyObject(source, getSymbolsIn(source), object);
      }
  
      /**
       * Creates a function like `_.groupBy`.
       *
       * @private
       * @param {Function} setter The function to set accumulator values.
       * @param {Function} [initializer] The accumulator object initializer.
       * @returns {Function} Returns the new aggregator function.
       */
      function createAggregator(setter, initializer) {
        return function(collection, iteratee) {
          var func = isArray(collection) ? arrayAggregator : baseAggregator,
              accumulator = initializer ? initializer() : {};
  
          return func(collection, setter, getIteratee(iteratee, 2), accumulator);
        };
      }
  
      /**
       * Creates a function like `_.assign`.
       *
       * @private
       * @param {Function} assigner The function to assign values.
       * @returns {Function} Returns the new assigner function.
       */
      function createAssigner(assigner) {
        return baseRest(function(object, sources) {
          var index = -1,
              length = sources.length,
              customizer = length > 1 ? sources[length - 1] : undefined,
              guard = length > 2 ? sources[2] : undefined;
  
          customizer = (assigner.length > 3 && typeof customizer == 'function')
            ? (length--, customizer)
            : undefined;
  
          if (guard && isIterateeCall(sources[0], sources[1], guard)) {
            customizer = length < 3 ? undefined : customizer;
            length = 1;
          }
          object = Object(object);
          while (++index < length) {
            var source = sources[index];
            if (source) {
              assigner(object, source, index, customizer);
            }
          }
          return object;
        });
      }
  
      /**
       * Creates a `baseEach` or `baseEachRight` function.
       *
       * @private
       * @param {Function} eachFunc The function to iterate over a collection.
       * @param {boolean} [fromRight] Specify iterating from right to left.
       * @returns {Function} Returns the new base function.
       */
      function createBaseEach(eachFunc, fromRight) {
        return function(collection, iteratee) {
          if (collection == null) {
            return collection;
          }
          if (!isArrayLike(collection)) {
            return eachFunc(collection, iteratee);
          }
          var length = collection.length,
              index = fromRight ? length : -1,
              iterable = Object(collection);
  
          while ((fromRight ? index-- : ++index < length)) {
            if (iteratee(iterable[index], index, iterable) === false) {
              break;
            }
          }
          return collection;
        };
      }
  
      /**
       * Creates a base function for methods like `_.forIn` and `_.forOwn`.
       *
       * @private
       * @param {boolean} [fromRight] Specify iterating from right to left.
       * @returns {Function} Returns the new base function.
       */
      function createBaseFor(fromRight) {
        return function(object, iteratee, keysFunc) {
          var index = -1,
              iterable = Object(object),
              props = keysFunc(object),
              length = props.length;
  
          while (length--) {
            var key = props[fromRight ? length : ++index];
            if (iteratee(iterable[key], key, iterable) === false) {
              break;
            }
          }
          return object;
        };
      }
  
      /**
       * Creates a function that wraps `func` to invoke it with the optional `this`
       * binding of `thisArg`.
       *
       * @private
       * @param {Function} func The function to wrap.
       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
       * @param {*} [thisArg] The `this` binding of `func`.
       * @returns {Function} Returns the new wrapped function.
       */
      function createBind(func, bitmask, thisArg) {
        var isBind = bitmask & WRAP_BIND_FLAG,
            Ctor = createCtor(func);
  
        function wrapper() {
          var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
          return fn.apply(isBind ? thisArg : this, arguments);
        }
        return wrapper;
      }
  
      /**
       * Creates a function like `_.lowerFirst`.
       *
       * @private
       * @param {string} methodName The name of the `String` case method to use.
       * @returns {Function} Returns the new case function.
       */
      function createCaseFirst(methodName) {
        return function(string) {
          string = toString(string);
  
          var strSymbols = hasUnicode(string)
            ? stringToArray(string)
            : undefined;
  
          var chr = strSymbols
            ? strSymbols[0]
            : string.charAt(0);
  
          var trailing = strSymbols
            ? castSlice(strSymbols, 1).join('')
            : string.slice(1);
  
          return chr[methodName]() + trailing;
        };
      }
  
      /**
       * Creates a function like `_.camelCase`.
       *
       * @private
       * @param {Function} callback The function to combine each word.
       * @returns {Function} Returns the new compounder function.
       */
      function createCompounder(callback) {
        return function(string) {
          return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
        };
      }
  
      /**
       * Creates a function that produces an instance of `Ctor` regardless of
       * whether it was invoked as part of a `new` expression or by `call` or `apply`.
       *
       * @private
       * @param {Function} Ctor The constructor to wrap.
       * @returns {Function} Returns the new wrapped function.
       */
      function createCtor(Ctor) {
        return function() {
          // Use a `switch` statement to work with class constructors. See
          // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
          // for more details.
          var args = arguments;
          switch (args.length) {
            case 0: return new Ctor;
            case 1: return new Ctor(args[0]);
            case 2: return new Ctor(args[0], args[1]);
            case 3: return new Ctor(args[0], args[1], args[2]);
            case 4: return new Ctor(args[0], args[1], args[2], args[3]);
            case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
            case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
            case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
          }
          var thisBinding = baseCreate(Ctor.prototype),
              result = Ctor.apply(thisBinding, args);
  
          // Mimic the constructor's `return` behavior.
          // See https://es5.github.io/#x13.2.2 for more details.
          return isObject(result) ? result : thisBinding;
        };
      }
  
      /**
       * Creates a function that wraps `func` to enable currying.
       *
       * @private
       * @param {Function} func The function to wrap.
       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
       * @param {number} arity The arity of `func`.
       * @returns {Function} Returns the new wrapped function.
       */
      function createCurry(func, bitmask, arity) {
        var Ctor = createCtor(func);
  
        function wrapper() {
          var length = arguments.length,
              args = Array(length),
              index = length,
              placeholder = getHolder(wrapper);
  
          while (index--) {
            args[index] = arguments[index];
          }
          var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
            ? []
            : replaceHolders(args, placeholder);
  
          length -= holders.length;
          if (length < arity) {
            return createRecurry(
              func, bitmask, createHybrid, wrapper.placeholder, undefined,
              args, holders, undefined, undefined, arity - length);
          }
          var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
          return apply(fn, this, args);
        }
        return wrapper;
      }
  
      /**
       * Creates a `_.find` or `_.findLast` function.
       *
       * @private
       * @param {Function} findIndexFunc The function to find the collection index.
       * @returns {Function} Returns the new find function.
       */
      function createFind(findIndexFunc) {
        return function(collection, predicate, fromIndex) {
          var iterable = Object(collection);
          if (!isArrayLike(collection)) {
            var iteratee = getIteratee(predicate, 3);
            collection = keys(collection);
            predicate = function(key) { return iteratee(iterable[key], key, iterable); };
          }
          var index = findIndexFunc(collection, predicate, fromIndex);
          return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
        };
      }
  
      /**
       * Creates a `_.flow` or `_.flowRight` function.
       *
       * @private
       * @param {boolean} [fromRight] Specify iterating from right to left.
       * @returns {Function} Returns the new flow function.
       */
      function createFlow(fromRight) {
        return flatRest(function(funcs) {
          var length = funcs.length,
              index = length,
              prereq = LodashWrapper.prototype.thru;
  
          if (fromRight) {
            funcs.reverse();
          }
          while (index--) {
            var func = funcs[index];
            if (typeof func != 'function') {
              throw new TypeError(FUNC_ERROR_TEXT);
            }
            if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
              var wrapper = new LodashWrapper([], true);
            }
          }
          index = wrapper ? index : length;
          while (++index < length) {
            func = funcs[index];
  
            var funcName = getFuncName(func),
                data = funcName == 'wrapper' ? getData(func) : undefined;
  
            if (data && isLaziable(data[0]) &&
                  data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
                  !data[4].length && data[9] == 1
                ) {
              wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
            } else {
              wrapper = (func.length == 1 && isLaziable(func))
                ? wrapper[funcName]()
                : wrapper.thru(func);
            }
          }
          return function() {
            var args = arguments,
                value = args[0];
  
            if (wrapper && args.length == 1 && isArray(value)) {
              return wrapper.plant(value).value();
            }
            var index = 0,
                result = length ? funcs[index].apply(this, args) : value;
  
            while (++index < length) {
              result = funcs[index].call(this, result);
            }
            return result;
          };
        });
      }
  
      /**
       * Creates a function that wraps `func` to invoke it with optional `this`
       * binding of `thisArg`, partial application, and currying.
       *
       * @private
       * @param {Function|string} func The function or method name to wrap.
       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
       * @param {*} [thisArg] The `this` binding of `func`.
       * @param {Array} [partials] The arguments to prepend to those provided to
       *  the new function.
       * @param {Array} [holders] The `partials` placeholder indexes.
       * @param {Array} [partialsRight] The arguments to append to those provided
       *  to the new function.
       * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
       * @param {Array} [argPos] The argument positions of the new function.
       * @param {number} [ary] The arity cap of `func`.
       * @param {number} [arity] The arity of `func`.
       * @returns {Function} Returns the new wrapped function.
       */
      function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
        var isAry = bitmask & WRAP_ARY_FLAG,
            isBind = bitmask & WRAP_BIND_FLAG,
            isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
            isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
            isFlip = bitmask & WRAP_FLIP_FLAG,
            Ctor = isBindKey ? undefined : createCtor(func);
  
        function wrapper() {
          var length = arguments.length,
              args = Array(length),
              index = length;
  
          while (index--) {
            args[index] = arguments[index];
          }
          if (isCurried) {
            var placeholder = getHolder(wrapper),
                holdersCount = countHolders(args, placeholder);
          }
          if (partials) {
            args = composeArgs(args, partials, holders, isCurried);
          }
          if (partialsRight) {
            args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
          }
          length -= holdersCount;
          if (isCurried && length < arity) {
            var newHolders = replaceHolders(args, placeholder);
            return createRecurry(
              func, bitmask, createHybrid, wrapper.placeholder, thisArg,
              args, newHolders, argPos, ary, arity - length
            );
          }
          var thisBinding = isBind ? thisArg : this,
              fn = isBindKey ? thisBinding[func] : func;
  
          length = args.length;
          if (argPos) {
            args = reorder(args, argPos);
          } else if (isFlip && length > 1) {
            args.reverse();
          }
          if (isAry && ary < length) {
            args.length = ary;
          }
          if (this && this !== root && this instanceof wrapper) {
            fn = Ctor || createCtor(fn);
          }
          return fn.apply(thisBinding, args);
        }
        return wrapper;
      }
  
      /**
       * Creates a function like `_.invertBy`.
       *
       * @private
       * @param {Function} setter The function to set accumulator values.
       * @param {Function} toIteratee The function to resolve iteratees.
       * @returns {Function} Returns the new inverter function.
       */
      function createInverter(setter, toIteratee) {
        return function(object, iteratee) {
          return baseInverter(object, setter, toIteratee(iteratee), {});
        };
      }
  
      /**
       * Creates a function that performs a mathematical operation on two values.
       *
       * @private
       * @param {Function} operator The function to perform the operation.
       * @param {number} [defaultValue] The value used for `undefined` arguments.
       * @returns {Function} Returns the new mathematical operation function.
       */
      function createMathOperation(operator, defaultValue) {
        return function(value, other) {
          var result;
          if (value === undefined && other === undefined) {
            return defaultValue;
          }
          if (value !== undefined) {
            result = value;
          }
          if (other !== undefined) {
            if (result === undefined) {
              return other;
            }
            if (typeof value == 'string' || typeof other == 'string') {
              value = baseToString(value);
              other = baseToString(other);
            } else {
              value = baseToNumber(value);
              other = baseToNumber(other);
            }
            result = operator(value, other);
          }
          return result;
        };
      }
  
      /**
       * Creates a function like `_.over`.
       *
       * @private
       * @param {Function} arrayFunc The function to iterate over iteratees.
       * @returns {Function} Returns the new over function.
       */
      function createOver(arrayFunc) {
        return flatRest(function(iteratees) {
          iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
          return baseRest(function(args) {
            var thisArg = this;
            return arrayFunc(iteratees, function(iteratee) {
              return apply(iteratee, thisArg, args);
            });
          });
        });
      }
  
      /**
       * Creates the padding for `string` based on `length`. The `chars` string
       * is truncated if the number of characters exceeds `length`.
       *
       * @private
       * @param {number} length The padding length.
       * @param {string} [chars=' '] The string used as padding.
       * @returns {string} Returns the padding for `string`.
       */
      function createPadding(length, chars) {
        chars = chars === undefined ? ' ' : baseToString(chars);
  
        var charsLength = chars.length;
        if (charsLength < 2) {
          return charsLength ? baseRepeat(chars, length) : chars;
        }
        var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
        return hasUnicode(chars)
          ? castSlice(stringToArray(result), 0, length).join('')
          : result.slice(0, length);
      }
  
      /**
       * Creates a function that wraps `func` to invoke it with the `this` binding
       * of `thisArg` and `partials` prepended to the arguments it receives.
       *
       * @private
       * @param {Function} func The function to wrap.
       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
       * @param {*} thisArg The `this` binding of `func`.
       * @param {Array} partials The arguments to prepend to those provided to
       *  the new function.
       * @returns {Function} Returns the new wrapped function.
       */
      function createPartial(func, bitmask, thisArg, partials) {
        var isBind = bitmask & WRAP_BIND_FLAG,
            Ctor = createCtor(func);
  
        function wrapper() {
          var argsIndex = -1,
              argsLength = arguments.length,
              leftIndex = -1,
              leftLength = partials.length,
              args = Array(leftLength + argsLength),
              fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
  
          while (++leftIndex < leftLength) {
            args[leftIndex] = partials[leftIndex];
          }
          while (argsLength--) {
            args[leftIndex++] = arguments[++argsIndex];
          }
          return apply(fn, isBind ? thisArg : this, args);
        }
        return wrapper;
      }
  
      /**
       * Creates a `_.range` or `_.rangeRight` function.
       *
       * @private
       * @param {boolean} [fromRight] Specify iterating from right to left.
       * @returns {Function} Returns the new range function.
       */
      function createRange(fromRight) {
        return function(start, end, step) {
          if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
            end = step = undefined;
          }
          // Ensure the sign of `-0` is preserved.
          start = toFinite(start);
          if (end === undefined) {
            end = start;
            start = 0;
          } else {
            end = toFinite(end);
          }
          step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
          return baseRange(start, end, step, fromRight);
        };
      }
  
      /**
       * Creates a function that performs a relational operation on two values.
       *
       * @private
       * @param {Function} operator The function to perform the operation.
       * @returns {Function} Returns the new relational operation function.
       */
      function createRelationalOperation(operator) {
        return function(value, other) {
          if (!(typeof value == 'string' && typeof other == 'string')) {
            value = toNumber(value);
            other = toNumber(other);
          }
          return operator(value, other);
        };
      }
  
      /**
       * Creates a function that wraps `func` to continue currying.
       *
       * @private
       * @param {Function} func The function to wrap.
       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
       * @param {Function} wrapFunc The function to create the `func` wrapper.
       * @param {*} placeholder The placeholder value.
       * @param {*} [thisArg] The `this` binding of `func`.
       * @param {Array} [partials] The arguments to prepend to those provided to
       *  the new function.
       * @param {Array} [holders] The `partials` placeholder indexes.
       * @param {Array} [argPos] The argument positions of the new function.
       * @param {number} [ary] The arity cap of `func`.
       * @param {number} [arity] The arity of `func`.
       * @returns {Function} Returns the new wrapped function.
       */
      function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
        var isCurry = bitmask & WRAP_CURRY_FLAG,
            newHolders = isCurry ? holders : undefined,
            newHoldersRight = isCurry ? undefined : holders,
            newPartials = isCurry ? partials : undefined,
            newPartialsRight = isCurry ? undefined : partials;
  
        bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
        bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
  
        if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
          bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
        }
        var newData = [
          func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
          newHoldersRight, argPos, ary, arity
        ];
  
        var result = wrapFunc.apply(undefined, newData);
        if (isLaziable(func)) {
          setData(result, newData);
        }
        result.placeholder = placeholder;
        return setWrapToString(result, func, bitmask);
      }
  
      /**
       * Creates a function like `_.round`.
       *
       * @private
       * @param {string} methodName The name of the `Math` method to use when rounding.
       * @returns {Function} Returns the new round function.
       */
      function createRound(methodName) {
        var func = Math[methodName];
        return function(number, precision) {
          number = toNumber(number);
          precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
          if (precision) {
            // Shift with exponential notation to avoid floating-point issues.
            // See [MDN](https://mdn.io/round#Examples) for more details.
            var pair = (toString(number) + 'e').split('e'),
                value = func(pair[0] + 'e' + (+pair[1] + precision));
  
            pair = (toString(value) + 'e').split('e');
            return +(pair[0] + 'e' + (+pair[1] - precision));
          }
          return func(number);
        };
      }
  
      /**
       * Creates a set object of `values`.
       *
       * @private
       * @param {Array} values The values to add to the set.
       * @returns {Object} Returns the new set.
       */
      var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
        return new Set(values);
      };
  
      /**
       * Creates a `_.toPairs` or `_.toPairsIn` function.
       *
       * @private
       * @param {Function} keysFunc The function to get the keys of a given object.
       * @returns {Function} Returns the new pairs function.
       */
      function createToPairs(keysFunc) {
        return function(object) {
          var tag = getTag(object);
          if (tag == mapTag) {
            return mapToArray(object);
          }
          if (tag == setTag) {
            return setToPairs(object);
          }
          return baseToPairs(object, keysFunc(object));
        };
      }
  
      /**
       * Creates a function that either curries or invokes `func` with optional
       * `this` binding and partially applied arguments.
       *
       * @private
       * @param {Function|string} func The function or method name to wrap.
       * @param {number} bitmask The bitmask flags.
       *    1 - `_.bind`
       *    2 - `_.bindKey`
       *    4 - `_.curry` or `_.curryRight` of a bound function
       *    8 - `_.curry`
       *   16 - `_.curryRight`
       *   32 - `_.partial`
       *   64 - `_.partialRight`
       *  128 - `_.rearg`
       *  256 - `_.ary`
       *  512 - `_.flip`
       * @param {*} [thisArg] The `this` binding of `func`.
       * @param {Array} [partials] The arguments to be partially applied.
       * @param {Array} [holders] The `partials` placeholder indexes.
       * @param {Array} [argPos] The argument positions of the new function.
       * @param {number} [ary] The arity cap of `func`.
       * @param {number} [arity] The arity of `func`.
       * @returns {Function} Returns the new wrapped function.
       */
      function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
        var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
        if (!isBindKey && typeof func != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        var length = partials ? partials.length : 0;
        if (!length) {
          bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
          partials = holders = undefined;
        }
        ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
        arity = arity === undefined ? arity : toInteger(arity);
        length -= holders ? holders.length : 0;
  
        if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
          var partialsRight = partials,
              holdersRight = holders;
  
          partials = holders = undefined;
        }
        var data = isBindKey ? undefined : getData(func);
  
        var newData = [
          func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
          argPos, ary, arity
        ];
  
        if (data) {
          mergeData(newData, data);
        }
        func = newData[0];
        bitmask = newData[1];
        thisArg = newData[2];
        partials = newData[3];
        holders = newData[4];
        arity = newData[9] = newData[9] === undefined
          ? (isBindKey ? 0 : func.length)
          : nativeMax(newData[9] - length, 0);
  
        if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
          bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
        }
        if (!bitmask || bitmask == WRAP_BIND_FLAG) {
          var result = createBind(func, bitmask, thisArg);
        } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
          result = createCurry(func, bitmask, arity);
        } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
          result = createPartial(func, bitmask, thisArg, partials);
        } else {
          result = createHybrid.apply(undefined, newData);
        }
        var setter = data ? baseSetData : setData;
        return setWrapToString(setter(result, newData), func, bitmask);
      }
  
      /**
       * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
       * of source objects to the destination object for all destination properties
       * that resolve to `undefined`.
       *
       * @private
       * @param {*} objValue The destination value.
       * @param {*} srcValue The source value.
       * @param {string} key The key of the property to assign.
       * @param {Object} object The parent object of `objValue`.
       * @returns {*} Returns the value to assign.
       */
      function customDefaultsAssignIn(objValue, srcValue, key, object) {
        if (objValue === undefined ||
            (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
          return srcValue;
        }
        return objValue;
      }
  
      /**
       * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
       * objects into destination objects that are passed thru.
       *
       * @private
       * @param {*} objValue The destination value.
       * @param {*} srcValue The source value.
       * @param {string} key The key of the property to merge.
       * @param {Object} object The parent object of `objValue`.
       * @param {Object} source The parent object of `srcValue`.
       * @param {Object} [stack] Tracks traversed source values and their merged
       *  counterparts.
       * @returns {*} Returns the value to assign.
       */
      function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
        if (isObject(objValue) && isObject(srcValue)) {
          // Recursively merge objects and arrays (susceptible to call stack limits).
          stack.set(srcValue, objValue);
          baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
          stack['delete'](srcValue);
        }
        return objValue;
      }
  
      /**
       * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
       * objects.
       *
       * @private
       * @param {*} value The value to inspect.
       * @param {string} key The key of the property to inspect.
       * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
       */
      function customOmitClone(value) {
        return isPlainObject(value) ? undefined : value;
      }
  
      /**
       * A specialized version of `baseIsEqualDeep` for arrays with support for
       * partial deep comparisons.
       *
       * @private
       * @param {Array} array The array to compare.
       * @param {Array} other The other array to compare.
       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
       * @param {Function} customizer The function to customize comparisons.
       * @param {Function} equalFunc The function to determine equivalents of values.
       * @param {Object} stack Tracks traversed `array` and `other` objects.
       * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
       */
      function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
        var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
            arrLength = array.length,
            othLength = other.length;
  
        if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
          return false;
        }
        // Assume cyclic values are equal.
        var stacked = stack.get(array);
        if (stacked && stack.get(other)) {
          return stacked == other;
        }
        var index = -1,
            result = true,
            seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;
  
        stack.set(array, other);
        stack.set(other, array);
  
        // Ignore non-index properties.
        while (++index < arrLength) {
          var arrValue = array[index],
              othValue = other[index];
  
          if (customizer) {
            var compared = isPartial
              ? customizer(othValue, arrValue, index, other, array, stack)
              : customizer(arrValue, othValue, index, array, other, stack);
          }
          if (compared !== undefined) {
            if (compared) {
              continue;
            }
            result = false;
            break;
          }
          // Recursively compare arrays (susceptible to call stack limits).
          if (seen) {
            if (!arraySome(other, function(othValue, othIndex) {
                  if (!cacheHas(seen, othIndex) &&
                      (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
                    return seen.push(othIndex);
                  }
                })) {
              result = false;
              break;
            }
          } else if (!(
                arrValue === othValue ||
                  equalFunc(arrValue, othValue, bitmask, customizer, stack)
              )) {
            result = false;
            break;
          }
        }
        stack['delete'](array);
        stack['delete'](other);
        return result;
      }
  
      /**
       * A specialized version of `baseIsEqualDeep` for comparing objects of
       * the same `toStringTag`.
       *
       * **Note:** This function only supports comparing values with tags of
       * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
       *
       * @private
       * @param {Object} object The object to compare.
       * @param {Object} other The other object to compare.
       * @param {string} tag The `toStringTag` of the objects to compare.
       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
       * @param {Function} customizer The function to customize comparisons.
       * @param {Function} equalFunc The function to determine equivalents of values.
       * @param {Object} stack Tracks traversed `object` and `other` objects.
       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
       */
      function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
        switch (tag) {
          case dataViewTag:
            if ((object.byteLength != other.byteLength) ||
                (object.byteOffset != other.byteOffset)) {
              return false;
            }
            object = object.buffer;
            other = other.buffer;
  
          case arrayBufferTag:
            if ((object.byteLength != other.byteLength) ||
                !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
              return false;
            }
            return true;
  
          case boolTag:
          case dateTag:
          case numberTag:
            // Coerce booleans to `1` or `0` and dates to milliseconds.
            // Invalid dates are coerced to `NaN`.
            return eq(+object, +other);
  
          case errorTag:
            return object.name == other.name && object.message == other.message;
  
          case regexpTag:
          case stringTag:
            // Coerce regexes to strings and treat strings, primitives and objects,
            // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
            // for more details.
            return object == (other + '');
  
          case mapTag:
            var convert = mapToArray;
  
          case setTag:
            var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
            convert || (convert = setToArray);
  
            if (object.size != other.size && !isPartial) {
              return false;
            }
            // Assume cyclic values are equal.
            var stacked = stack.get(object);
            if (stacked) {
              return stacked == other;
            }
            bitmask |= COMPARE_UNORDERED_FLAG;
  
            // Recursively compare objects (susceptible to call stack limits).
            stack.set(object, other);
            var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
            stack['delete'](object);
            return result;
  
          case symbolTag:
            if (symbolValueOf) {
              return symbolValueOf.call(object) == symbolValueOf.call(other);
            }
        }
        return false;
      }
  
      /**
       * A specialized version of `baseIsEqualDeep` for objects with support for
       * partial deep comparisons.
       *
       * @private
       * @param {Object} object The object to compare.
       * @param {Object} other The other object to compare.
       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
       * @param {Function} customizer The function to customize comparisons.
       * @param {Function} equalFunc The function to determine equivalents of values.
       * @param {Object} stack Tracks traversed `object` and `other` objects.
       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
       */
      function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
        var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
            objProps = getAllKeys(object),
            objLength = objProps.length,
            othProps = getAllKeys(other),
            othLength = othProps.length;
  
        if (objLength != othLength && !isPartial) {
          return false;
        }
        var index = objLength;
        while (index--) {
          var key = objProps[index];
          if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
            return false;
          }
        }
        // Assume cyclic values are equal.
        var stacked = stack.get(object);
        if (stacked && stack.get(other)) {
          return stacked == other;
        }
        var result = true;
        stack.set(object, other);
        stack.set(other, object);
  
        var skipCtor = isPartial;
        while (++index < objLength) {
          key = objProps[index];
          var objValue = object[key],
              othValue = other[key];
  
          if (customizer) {
            var compared = isPartial
              ? customizer(othValue, objValue, key, other, object, stack)
              : customizer(objValue, othValue, key, object, other, stack);
          }
          // Recursively compare objects (susceptible to call stack limits).
          if (!(compared === undefined
                ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
                : compared
              )) {
            result = false;
            break;
          }
          skipCtor || (skipCtor = key == 'constructor');
        }
        if (result && !skipCtor) {
          var objCtor = object.constructor,
              othCtor = other.constructor;
  
          // Non `Object` object instances with different constructors are not equal.
          if (objCtor != othCtor &&
              ('constructor' in object && 'constructor' in other) &&
              !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
                typeof othCtor == 'function' && othCtor instanceof othCtor)) {
            result = false;
          }
        }
        stack['delete'](object);
        stack['delete'](other);
        return result;
      }
  
      /**
       * A specialized version of `baseRest` which flattens the rest array.
       *
       * @private
       * @param {Function} func The function to apply a rest parameter to.
       * @returns {Function} Returns the new function.
       */
      function flatRest(func) {
        return setToString(overRest(func, undefined, flatten), func + '');
      }
  
      /**
       * Creates an array of own enumerable property names and symbols of `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property names and symbols.
       */
      function getAllKeys(object) {
        return baseGetAllKeys(object, keys, getSymbols);
      }
  
      /**
       * Creates an array of own and inherited enumerable property names and
       * symbols of `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property names and symbols.
       */
      function getAllKeysIn(object) {
        return baseGetAllKeys(object, keysIn, getSymbolsIn);
      }
  
      /**
       * Gets metadata for `func`.
       *
       * @private
       * @param {Function} func The function to query.
       * @returns {*} Returns the metadata for `func`.
       */
      var getData = !metaMap ? noop : function(func) {
        return metaMap.get(func);
      };
  
      /**
       * Gets the name of `func`.
       *
       * @private
       * @param {Function} func The function to query.
       * @returns {string} Returns the function name.
       */
      function getFuncName(func) {
        var result = (func.name + ''),
            array = realNames[result],
            length = hasOwnProperty.call(realNames, result) ? array.length : 0;
  
        while (length--) {
          var data = array[length],
              otherFunc = data.func;
          if (otherFunc == null || otherFunc == func) {
            return data.name;
          }
        }
        return result;
      }
  
      /**
       * Gets the argument placeholder value for `func`.
       *
       * @private
       * @param {Function} func The function to inspect.
       * @returns {*} Returns the placeholder value.
       */
      function getHolder(func) {
        var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
        return object.placeholder;
      }
  
      /**
       * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
       * this function returns the custom method, otherwise it returns `baseIteratee`.
       * If arguments are provided, the chosen function is invoked with them and
       * its result is returned.
       *
       * @private
       * @param {*} [value] The value to convert to an iteratee.
       * @param {number} [arity] The arity of the created iteratee.
       * @returns {Function} Returns the chosen function or its result.
       */
      function getIteratee() {
        var result = lodash.iteratee || iteratee;
        result = result === iteratee ? baseIteratee : result;
        return arguments.length ? result(arguments[0], arguments[1]) : result;
      }
  
      /**
       * Gets the data for `map`.
       *
       * @private
       * @param {Object} map The map to query.
       * @param {string} key The reference key.
       * @returns {*} Returns the map data.
       */
      function getMapData(map, key) {
        var data = map.__data__;
        return isKeyable(key)
          ? data[typeof key == 'string' ? 'string' : 'hash']
          : data.map;
      }
  
      /**
       * Gets the property names, values, and compare flags of `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @returns {Array} Returns the match data of `object`.
       */
      function getMatchData(object) {
        var result = keys(object),
            length = result.length;
  
        while (length--) {
          var key = result[length],
              value = object[key];
  
          result[length] = [key, value, isStrictComparable(value)];
        }
        return result;
      }
  
      /**
       * Gets the native function at `key` of `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @param {string} key The key of the method to get.
       * @returns {*} Returns the function if it's native, else `undefined`.
       */
      function getNative(object, key) {
        var value = getValue(object, key);
        return baseIsNative(value) ? value : undefined;
      }
  
      /**
       * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
       *
       * @private
       * @param {*} value The value to query.
       * @returns {string} Returns the raw `toStringTag`.
       */
      function getRawTag(value) {
        var isOwn = hasOwnProperty.call(value, symToStringTag),
            tag = value[symToStringTag];
  
        try {
          value[symToStringTag] = undefined;
          var unmasked = true;
        } catch (e) {}
  
        var result = nativeObjectToString.call(value);
        if (unmasked) {
          if (isOwn) {
            value[symToStringTag] = tag;
          } else {
            delete value[symToStringTag];
          }
        }
        return result;
      }
  
      /**
       * Creates an array of the own enumerable symbols of `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of symbols.
       */
      var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
        if (object == null) {
          return [];
        }
        object = Object(object);
        return arrayFilter(nativeGetSymbols(object), function(symbol) {
          return propertyIsEnumerable.call(object, symbol);
        });
      };
  
      /**
       * Creates an array of the own and inherited enumerable symbols of `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of symbols.
       */
      var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
        var result = [];
        while (object) {
          arrayPush(result, getSymbols(object));
          object = getPrototype(object);
        }
        return result;
      };
  
      /**
       * Gets the `toStringTag` of `value`.
       *
       * @private
       * @param {*} value The value to query.
       * @returns {string} Returns the `toStringTag`.
       */
      var getTag = baseGetTag;
  
      // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
      if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
          (Map && getTag(new Map) != mapTag) ||
          (Promise && getTag(Promise.resolve()) != promiseTag) ||
          (Set && getTag(new Set) != setTag) ||
          (WeakMap && getTag(new WeakMap) != weakMapTag)) {
        getTag = function(value) {
          var result = baseGetTag(value),
              Ctor = result == objectTag ? value.constructor : undefined,
              ctorString = Ctor ? toSource(Ctor) : '';
  
          if (ctorString) {
            switch (ctorString) {
              case dataViewCtorString: return dataViewTag;
              case mapCtorString: return mapTag;
              case promiseCtorString: return promiseTag;
              case setCtorString: return setTag;
              case weakMapCtorString: return weakMapTag;
            }
          }
          return result;
        };
      }
  
      /**
       * Gets the view, applying any `transforms` to the `start` and `end` positions.
       *
       * @private
       * @param {number} start The start of the view.
       * @param {number} end The end of the view.
       * @param {Array} transforms The transformations to apply to the view.
       * @returns {Object} Returns an object containing the `start` and `end`
       *  positions of the view.
       */
      function getView(start, end, transforms) {
        var index = -1,
            length = transforms.length;
  
        while (++index < length) {
          var data = transforms[index],
              size = data.size;
  
          switch (data.type) {
            case 'drop':      start += size; break;
            case 'dropRight': end -= size; break;
            case 'take':      end = nativeMin(end, start + size); break;
            case 'takeRight': start = nativeMax(start, end - size); break;
          }
        }
        return { 'start': start, 'end': end };
      }
  
      /**
       * Extracts wrapper details from the `source` body comment.
       *
       * @private
       * @param {string} source The source to inspect.
       * @returns {Array} Returns the wrapper details.
       */
      function getWrapDetails(source) {
        var match = source.match(reWrapDetails);
        return match ? match[1].split(reSplitDetails) : [];
      }
  
      /**
       * Checks if `path` exists on `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @param {Array|string} path The path to check.
       * @param {Function} hasFunc The function to check properties.
       * @returns {boolean} Returns `true` if `path` exists, else `false`.
       */
      function hasPath(object, path, hasFunc) {
        path = castPath(path, object);
  
        var index = -1,
            length = path.length,
            result = false;
  
        while (++index < length) {
          var key = toKey(path[index]);
          if (!(result = object != null && hasFunc(object, key))) {
            break;
          }
          object = object[key];
        }
        if (result || ++index != length) {
          return result;
        }
        length = object == null ? 0 : object.length;
        return !!length && isLength(length) && isIndex(key, length) &&
          (isArray(object) || isArguments(object));
      }
  
      /**
       * Initializes an array clone.
       *
       * @private
       * @param {Array} array The array to clone.
       * @returns {Array} Returns the initialized clone.
       */
      function initCloneArray(array) {
        var length = array.length,
            result = new array.constructor(length);
  
        // Add properties assigned by `RegExp#exec`.
        if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
          result.index = array.index;
          result.input = array.input;
        }
        return result;
      }
  
      /**
       * Initializes an object clone.
       *
       * @private
       * @param {Object} object The object to clone.
       * @returns {Object} Returns the initialized clone.
       */
      function initCloneObject(object) {
        return (typeof object.constructor == 'function' && !isPrototype(object))
          ? baseCreate(getPrototype(object))
          : {};
      }
  
      /**
       * Initializes an object clone based on its `toStringTag`.
       *
       * **Note:** This function only supports cloning values with tags of
       * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
       *
       * @private
       * @param {Object} object The object to clone.
       * @param {string} tag The `toStringTag` of the object to clone.
       * @param {boolean} [isDeep] Specify a deep clone.
       * @returns {Object} Returns the initialized clone.
       */
      function initCloneByTag(object, tag, isDeep) {
        var Ctor = object.constructor;
        switch (tag) {
          case arrayBufferTag:
            return cloneArrayBuffer(object);
  
          case boolTag:
          case dateTag:
            return new Ctor(+object);
  
          case dataViewTag:
            return cloneDataView(object, isDeep);
  
          case float32Tag: case float64Tag:
          case int8Tag: case int16Tag: case int32Tag:
          case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
            return cloneTypedArray(object, isDeep);
  
          case mapTag:
            return new Ctor;
  
          case numberTag:
          case stringTag:
            return new Ctor(object);
  
          case regexpTag:
            return cloneRegExp(object);
  
          case setTag:
            return new Ctor;
  
          case symbolTag:
            return cloneSymbol(object);
        }
      }
  
      /**
       * Inserts wrapper `details` in a comment at the top of the `source` body.
       *
       * @private
       * @param {string} source The source to modify.
       * @returns {Array} details The details to insert.
       * @returns {string} Returns the modified source.
       */
      function insertWrapDetails(source, details) {
        var length = details.length;
        if (!length) {
          return source;
        }
        var lastIndex = length - 1;
        details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
        details = details.join(length > 2 ? ', ' : ' ');
        return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
      }
  
      /**
       * Checks if `value` is a flattenable `arguments` object or array.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
       */
      function isFlattenable(value) {
        return isArray(value) || isArguments(value) ||
          !!(spreadableSymbol && value && value[spreadableSymbol]);
      }
  
      /**
       * Checks if `value` is a valid array-like index.
       *
       * @private
       * @param {*} value The value to check.
       * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
       * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
       */
      function isIndex(value, length) {
        var type = typeof value;
        length = length == null ? MAX_SAFE_INTEGER : length;
  
        return !!length &&
          (type == 'number' ||
            (type != 'symbol' && reIsUint.test(value))) &&
              (value > -1 && value % 1 == 0 && value < length);
      }
  
      /**
       * Checks if the given arguments are from an iteratee call.
       *
       * @private
       * @param {*} value The potential iteratee value argument.
       * @param {*} index The potential iteratee index or key argument.
       * @param {*} object The potential iteratee object argument.
       * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
       *  else `false`.
       */
      function isIterateeCall(value, index, object) {
        if (!isObject(object)) {
          return false;
        }
        var type = typeof index;
        if (type == 'number'
              ? (isArrayLike(object) && isIndex(index, object.length))
              : (type == 'string' && index in object)
            ) {
          return eq(object[index], value);
        }
        return false;
      }
  
      /**
       * Checks if `value` is a property name and not a property path.
       *
       * @private
       * @param {*} value The value to check.
       * @param {Object} [object] The object to query keys on.
       * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
       */
      function isKey(value, object) {
        if (isArray(value)) {
          return false;
        }
        var type = typeof value;
        if (type == 'number' || type == 'symbol' || type == 'boolean' ||
            value == null || isSymbol(value)) {
          return true;
        }
        return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
          (object != null && value in Object(object));
      }
  
      /**
       * Checks if `value` is suitable for use as unique object key.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
       */
      function isKeyable(value) {
        var type = typeof value;
        return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
          ? (value !== '__proto__')
          : (value === null);
      }
  
      /**
       * Checks if `func` has a lazy counterpart.
       *
       * @private
       * @param {Function} func The function to check.
       * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
       *  else `false`.
       */
      function isLaziable(func) {
        var funcName = getFuncName(func),
            other = lodash[funcName];
  
        if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
          return false;
        }
        if (func === other) {
          return true;
        }
        var data = getData(other);
        return !!data && func === data[0];
      }
  
      /**
       * Checks if `func` has its source masked.
       *
       * @private
       * @param {Function} func The function to check.
       * @returns {boolean} Returns `true` if `func` is masked, else `false`.
       */
      function isMasked(func) {
        return !!maskSrcKey && (maskSrcKey in func);
      }
  
      /**
       * Checks if `func` is capable of being masked.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
       */
      var isMaskable = coreJsData ? isFunction : stubFalse;
  
      /**
       * Checks if `value` is likely a prototype object.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
       */
      function isPrototype(value) {
        var Ctor = value && value.constructor,
            proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
  
        return value === proto;
      }
  
      /**
       * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
       *
       * @private
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` if suitable for strict
       *  equality comparisons, else `false`.
       */
      function isStrictComparable(value) {
        return value === value && !isObject(value);
      }
  
      /**
       * A specialized version of `matchesProperty` for source values suitable
       * for strict equality comparisons, i.e. `===`.
       *
       * @private
       * @param {string} key The key of the property to get.
       * @param {*} srcValue The value to match.
       * @returns {Function} Returns the new spec function.
       */
      function matchesStrictComparable(key, srcValue) {
        return function(object) {
          if (object == null) {
            return false;
          }
          return object[key] === srcValue &&
            (srcValue !== undefined || (key in Object(object)));
        };
      }
  
      /**
       * A specialized version of `_.memoize` which clears the memoized function's
       * cache when it exceeds `MAX_MEMOIZE_SIZE`.
       *
       * @private
       * @param {Function} func The function to have its output memoized.
       * @returns {Function} Returns the new memoized function.
       */
      function memoizeCapped(func) {
        var result = memoize(func, function(key) {
          if (cache.size === MAX_MEMOIZE_SIZE) {
            cache.clear();
          }
          return key;
        });
  
        var cache = result.cache;
        return result;
      }
  
      /**
       * Merges the function metadata of `source` into `data`.
       *
       * Merging metadata reduces the number of wrappers used to invoke a function.
       * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
       * may be applied regardless of execution order. Methods like `_.ary` and
       * `_.rearg` modify function arguments, making the order in which they are
       * executed important, preventing the merging of metadata. However, we make
       * an exception for a safe combined case where curried functions have `_.ary`
       * and or `_.rearg` applied.
       *
       * @private
       * @param {Array} data The destination metadata.
       * @param {Array} source The source metadata.
       * @returns {Array} Returns `data`.
       */
      function mergeData(data, source) {
        var bitmask = data[1],
            srcBitmask = source[1],
            newBitmask = bitmask | srcBitmask,
            isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
  
        var isCombo =
          ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
          ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
          ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));
  
        // Exit early if metadata can't be merged.
        if (!(isCommon || isCombo)) {
          return data;
        }
        // Use source `thisArg` if available.
        if (srcBitmask & WRAP_BIND_FLAG) {
          data[2] = source[2];
          // Set when currying a bound function.
          newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
        }
        // Compose partial arguments.
        var value = source[3];
        if (value) {
          var partials = data[3];
          data[3] = partials ? composeArgs(partials, value, source[4]) : value;
          data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
        }
        // Compose partial right arguments.
        value = source[5];
        if (value) {
          partials = data[5];
          data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
          data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
        }
        // Use source `argPos` if available.
        value = source[7];
        if (value) {
          data[7] = value;
        }
        // Use source `ary` if it's smaller.
        if (srcBitmask & WRAP_ARY_FLAG) {
          data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
        }
        // Use source `arity` if one is not provided.
        if (data[9] == null) {
          data[9] = source[9];
        }
        // Use source `func` and merge bitmasks.
        data[0] = source[0];
        data[1] = newBitmask;
  
        return data;
      }
  
      /**
       * This function is like
       * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
       * except that it includes inherited enumerable properties.
       *
       * @private
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property names.
       */
      function nativeKeysIn(object) {
        var result = [];
        if (object != null) {
          for (var key in Object(object)) {
            result.push(key);
          }
        }
        return result;
      }
  
      /**
       * Converts `value` to a string using `Object.prototype.toString`.
       *
       * @private
       * @param {*} value The value to convert.
       * @returns {string} Returns the converted string.
       */
      function objectToString(value) {
        return nativeObjectToString.call(value);
      }
  
      /**
       * A specialized version of `baseRest` which transforms the rest array.
       *
       * @private
       * @param {Function} func The function to apply a rest parameter to.
       * @param {number} [start=func.length-1] The start position of the rest parameter.
       * @param {Function} transform The rest array transform.
       * @returns {Function} Returns the new function.
       */
      function overRest(func, start, transform) {
        start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
        return function() {
          var args = arguments,
              index = -1,
              length = nativeMax(args.length - start, 0),
              array = Array(length);
  
          while (++index < length) {
            array[index] = args[start + index];
          }
          index = -1;
          var otherArgs = Array(start + 1);
          while (++index < start) {
            otherArgs[index] = args[index];
          }
          otherArgs[start] = transform(array);
          return apply(func, this, otherArgs);
        };
      }
  
      /**
       * Gets the parent value at `path` of `object`.
       *
       * @private
       * @param {Object} object The object to query.
       * @param {Array} path The path to get the parent value of.
       * @returns {*} Returns the parent value.
       */
      function parent(object, path) {
        return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
      }
  
      /**
       * Reorder `array` according to the specified indexes where the element at
       * the first index is assigned as the first element, the element at
       * the second index is assigned as the second element, and so on.
       *
       * @private
       * @param {Array} array The array to reorder.
       * @param {Array} indexes The arranged array indexes.
       * @returns {Array} Returns `array`.
       */
      function reorder(array, indexes) {
        var arrLength = array.length,
            length = nativeMin(indexes.length, arrLength),
            oldArray = copyArray(array);
  
        while (length--) {
          var index = indexes[length];
          array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
        }
        return array;
      }
  
      /**
       * Gets the value at `key`, unless `key` is "__proto__".
       *
       * @private
       * @param {Object} object The object to query.
       * @param {string} key The key of the property to get.
       * @returns {*} Returns the property value.
       */
      function safeGet(object, key) {
        if (key == '__proto__') {
          return;
        }
  
        return object[key];
      }
  
      /**
       * Sets metadata for `func`.
       *
       * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
       * period of time, it will trip its breaker and transition to an identity
       * function to avoid garbage collection pauses in V8. See
       * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
       * for more details.
       *
       * @private
       * @param {Function} func The function to associate metadata with.
       * @param {*} data The metadata.
       * @returns {Function} Returns `func`.
       */
      var setData = shortOut(baseSetData);
  
      /**
       * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
       *
       * @private
       * @param {Function} func The function to delay.
       * @param {number} wait The number of milliseconds to delay invocation.
       * @returns {number|Object} Returns the timer id or timeout object.
       */
      var setTimeout = ctxSetTimeout || function(func, wait) {
        return root.setTimeout(func, wait);
      };
  
      /**
       * Sets the `toString` method of `func` to return `string`.
       *
       * @private
       * @param {Function} func The function to modify.
       * @param {Function} string The `toString` result.
       * @returns {Function} Returns `func`.
       */
      var setToString = shortOut(baseSetToString);
  
      /**
       * Sets the `toString` method of `wrapper` to mimic the source of `reference`
       * with wrapper details in a comment at the top of the source body.
       *
       * @private
       * @param {Function} wrapper The function to modify.
       * @param {Function} reference The reference function.
       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
       * @returns {Function} Returns `wrapper`.
       */
      function setWrapToString(wrapper, reference, bitmask) {
        var source = (reference + '');
        return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
      }
  
      /**
       * Creates a function that'll short out and invoke `identity` instead
       * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
       * milliseconds.
       *
       * @private
       * @param {Function} func The function to restrict.
       * @returns {Function} Returns the new shortable function.
       */
      function shortOut(func) {
        var count = 0,
            lastCalled = 0;
  
        return function() {
          var stamp = nativeNow(),
              remaining = HOT_SPAN - (stamp - lastCalled);
  
          lastCalled = stamp;
          if (remaining > 0) {
            if (++count >= HOT_COUNT) {
              return arguments[0];
            }
          } else {
            count = 0;
          }
          return func.apply(undefined, arguments);
        };
      }
  
      /**
       * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
       *
       * @private
       * @param {Array} array The array to shuffle.
       * @param {number} [size=array.length] The size of `array`.
       * @returns {Array} Returns `array`.
       */
      function shuffleSelf(array, size) {
        var index = -1,
            length = array.length,
            lastIndex = length - 1;
  
        size = size === undefined ? length : size;
        while (++index < size) {
          var rand = baseRandom(index, lastIndex),
              value = array[rand];
  
          array[rand] = array[index];
          array[index] = value;
        }
        array.length = size;
        return array;
      }
  
      /**
       * Converts `string` to a property path array.
       *
       * @private
       * @param {string} string The string to convert.
       * @returns {Array} Returns the property path array.
       */
      var stringToPath = memoizeCapped(function(string) {
        var result = [];
        if (string.charCodeAt(0) === 46 /* . */) {
          result.push('');
        }
        string.replace(rePropName, function(match, number, quote, subString) {
          result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));
        });
        return result;
      });
  
      /**
       * Converts `value` to a string key if it's not a string or symbol.
       *
       * @private
       * @param {*} value The value to inspect.
       * @returns {string|symbol} Returns the key.
       */
      function toKey(value) {
        if (typeof value == 'string' || isSymbol(value)) {
          return value;
        }
        var result = (value + '');
        return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
      }
  
      /**
       * Converts `func` to its source code.
       *
       * @private
       * @param {Function} func The function to convert.
       * @returns {string} Returns the source code.
       */
      function toSource(func) {
        if (func != null) {
          try {
            return funcToString.call(func);
          } catch (e) {}
          try {
            return (func + '');
          } catch (e) {}
        }
        return '';
      }
  
      /**
       * Updates wrapper `details` based on `bitmask` flags.
       *
       * @private
       * @returns {Array} details The details to modify.
       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
       * @returns {Array} Returns `details`.
       */
      function updateWrapDetails(details, bitmask) {
        arrayEach(wrapFlags, function(pair) {
          var value = '_.' + pair[0];
          if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
            details.push(value);
          }
        });
        return details.sort();
      }
  
      /**
       * Creates a clone of `wrapper`.
       *
       * @private
       * @param {Object} wrapper The wrapper to clone.
       * @returns {Object} Returns the cloned wrapper.
       */
      function wrapperClone(wrapper) {
        if (wrapper instanceof LazyWrapper) {
          return wrapper.clone();
        }
        var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
        result.__actions__ = copyArray(wrapper.__actions__);
        result.__index__  = wrapper.__index__;
        result.__values__ = wrapper.__values__;
        return result;
      }
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates an array of elements split into groups the length of `size`.
       * If `array` can't be split evenly, the final chunk will be the remaining
       * elements.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to process.
       * @param {number} [size=1] The length of each chunk
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Array} Returns the new array of chunks.
       * @example
       *
       * _.chunk(['a', 'b', 'c', 'd'], 2);
       * // => [['a', 'b'], ['c', 'd']]
       *
       * _.chunk(['a', 'b', 'c', 'd'], 3);
       * // => [['a', 'b', 'c'], ['d']]
       */
      function chunk(array, size, guard) {
        if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
          size = 1;
        } else {
          size = nativeMax(toInteger(size), 0);
        }
        var length = array == null ? 0 : array.length;
        if (!length || size < 1) {
          return [];
        }
        var index = 0,
            resIndex = 0,
            result = Array(nativeCeil(length / size));
  
        while (index < length) {
          result[resIndex++] = baseSlice(array, index, (index += size));
        }
        return result;
      }
  
      /**
       * Creates an array with all falsey values removed. The values `false`, `null`,
       * `0`, `""`, `undefined`, and `NaN` are falsey.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to compact.
       * @returns {Array} Returns the new array of filtered values.
       * @example
       *
       * _.compact([0, 1, false, 2, '', 3]);
       * // => [1, 2, 3]
       */
      function compact(array) {
        var index = -1,
            length = array == null ? 0 : array.length,
            resIndex = 0,
            result = [];
  
        while (++index < length) {
          var value = array[index];
          if (value) {
            result[resIndex++] = value;
          }
        }
        return result;
      }
  
      /**
       * Creates a new array concatenating `array` with any additional arrays
       * and/or values.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to concatenate.
       * @param {...*} [values] The values to concatenate.
       * @returns {Array} Returns the new concatenated array.
       * @example
       *
       * var array = [1];
       * var other = _.concat(array, 2, [3], [[4]]);
       *
       * console.log(other);
       * // => [1, 2, 3, [4]]
       *
       * console.log(array);
       * // => [1]
       */
      function concat() {
        var length = arguments.length;
        if (!length) {
          return [];
        }
        var args = Array(length - 1),
            array = arguments[0],
            index = length;
  
        while (index--) {
          args[index - 1] = arguments[index];
        }
        return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
      }
  
      /**
       * Creates an array of `array` values not included in the other given arrays
       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * for equality comparisons. The order and references of result values are
       * determined by the first array.
       *
       * **Note:** Unlike `_.pullAll`, this method returns a new array.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {...Array} [values] The values to exclude.
       * @returns {Array} Returns the new array of filtered values.
       * @see _.without, _.xor
       * @example
       *
       * _.difference([2, 1], [2, 3]);
       * // => [1]
       */
      var difference = baseRest(function(array, values) {
        return isArrayLikeObject(array)
          ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
          : [];
      });
  
      /**
       * This method is like `_.difference` except that it accepts `iteratee` which
       * is invoked for each element of `array` and `values` to generate the criterion
       * by which they're compared. The order and references of result values are
       * determined by the first array. The iteratee is invoked with one argument:
       * (value).
       *
       * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {...Array} [values] The values to exclude.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {Array} Returns the new array of filtered values.
       * @example
       *
       * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
       * // => [1.2]
       *
       * // The `_.property` iteratee shorthand.
       * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
       * // => [{ 'x': 2 }]
       */
      var differenceBy = baseRest(function(array, values) {
        var iteratee = last(values);
        if (isArrayLikeObject(iteratee)) {
          iteratee = undefined;
        }
        return isArrayLikeObject(array)
          ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
          : [];
      });
  
      /**
       * This method is like `_.difference` except that it accepts `comparator`
       * which is invoked to compare elements of `array` to `values`. The order and
       * references of result values are determined by the first array. The comparator
       * is invoked with two arguments: (arrVal, othVal).
       *
       * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {...Array} [values] The values to exclude.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new array of filtered values.
       * @example
       *
       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
       *
       * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
       * // => [{ 'x': 2, 'y': 1 }]
       */
      var differenceWith = baseRest(function(array, values) {
        var comparator = last(values);
        if (isArrayLikeObject(comparator)) {
          comparator = undefined;
        }
        return isArrayLikeObject(array)
          ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
          : [];
      });
  
      /**
       * Creates a slice of `array` with `n` elements dropped from the beginning.
       *
       * @static
       * @memberOf _
       * @since 0.5.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {number} [n=1] The number of elements to drop.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * _.drop([1, 2, 3]);
       * // => [2, 3]
       *
       * _.drop([1, 2, 3], 2);
       * // => [3]
       *
       * _.drop([1, 2, 3], 5);
       * // => []
       *
       * _.drop([1, 2, 3], 0);
       * // => [1, 2, 3]
       */
      function drop(array, n, guard) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return [];
        }
        n = (guard || n === undefined) ? 1 : toInteger(n);
        return baseSlice(array, n < 0 ? 0 : n, length);
      }
  
      /**
       * Creates a slice of `array` with `n` elements dropped from the end.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {number} [n=1] The number of elements to drop.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * _.dropRight([1, 2, 3]);
       * // => [1, 2]
       *
       * _.dropRight([1, 2, 3], 2);
       * // => [1]
       *
       * _.dropRight([1, 2, 3], 5);
       * // => []
       *
       * _.dropRight([1, 2, 3], 0);
       * // => [1, 2, 3]
       */
      function dropRight(array, n, guard) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return [];
        }
        n = (guard || n === undefined) ? 1 : toInteger(n);
        n = length - n;
        return baseSlice(array, 0, n < 0 ? 0 : n);
      }
  
      /**
       * Creates a slice of `array` excluding elements dropped from the end.
       * Elements are dropped until `predicate` returns falsey. The predicate is
       * invoked with three arguments: (value, index, array).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'active': true },
       *   { 'user': 'fred',    'active': false },
       *   { 'user': 'pebbles', 'active': false }
       * ];
       *
       * _.dropRightWhile(users, function(o) { return !o.active; });
       * // => objects for ['barney']
       *
       * // The `_.matches` iteratee shorthand.
       * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
       * // => objects for ['barney', 'fred']
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.dropRightWhile(users, ['active', false]);
       * // => objects for ['barney']
       *
       * // The `_.property` iteratee shorthand.
       * _.dropRightWhile(users, 'active');
       * // => objects for ['barney', 'fred', 'pebbles']
       */
      function dropRightWhile(array, predicate) {
        return (array && array.length)
          ? baseWhile(array, getIteratee(predicate, 3), true, true)
          : [];
      }
  
      /**
       * Creates a slice of `array` excluding elements dropped from the beginning.
       * Elements are dropped until `predicate` returns falsey. The predicate is
       * invoked with three arguments: (value, index, array).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'active': false },
       *   { 'user': 'fred',    'active': false },
       *   { 'user': 'pebbles', 'active': true }
       * ];
       *
       * _.dropWhile(users, function(o) { return !o.active; });
       * // => objects for ['pebbles']
       *
       * // The `_.matches` iteratee shorthand.
       * _.dropWhile(users, { 'user': 'barney', 'active': false });
       * // => objects for ['fred', 'pebbles']
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.dropWhile(users, ['active', false]);
       * // => objects for ['pebbles']
       *
       * // The `_.property` iteratee shorthand.
       * _.dropWhile(users, 'active');
       * // => objects for ['barney', 'fred', 'pebbles']
       */
      function dropWhile(array, predicate) {
        return (array && array.length)
          ? baseWhile(array, getIteratee(predicate, 3), true)
          : [];
      }
  
      /**
       * Fills elements of `array` with `value` from `start` up to, but not
       * including, `end`.
       *
       * **Note:** This method mutates `array`.
       *
       * @static
       * @memberOf _
       * @since 3.2.0
       * @category Array
       * @param {Array} array The array to fill.
       * @param {*} value The value to fill `array` with.
       * @param {number} [start=0] The start position.
       * @param {number} [end=array.length] The end position.
       * @returns {Array} Returns `array`.
       * @example
       *
       * var array = [1, 2, 3];
       *
       * _.fill(array, 'a');
       * console.log(array);
       * // => ['a', 'a', 'a']
       *
       * _.fill(Array(3), 2);
       * // => [2, 2, 2]
       *
       * _.fill([4, 6, 8, 10], '*', 1, 3);
       * // => [4, '*', '*', 10]
       */
      function fill(array, value, start, end) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return [];
        }
        if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
          start = 0;
          end = length;
        }
        return baseFill(array, value, start, end);
      }
  
      /**
       * This method is like `_.find` except that it returns the index of the first
       * element `predicate` returns truthy for instead of the element itself.
       *
       * @static
       * @memberOf _
       * @since 1.1.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @param {number} [fromIndex=0] The index to search from.
       * @returns {number} Returns the index of the found element, else `-1`.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'active': false },
       *   { 'user': 'fred',    'active': false },
       *   { 'user': 'pebbles', 'active': true }
       * ];
       *
       * _.findIndex(users, function(o) { return o.user == 'barney'; });
       * // => 0
       *
       * // The `_.matches` iteratee shorthand.
       * _.findIndex(users, { 'user': 'fred', 'active': false });
       * // => 1
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.findIndex(users, ['active', false]);
       * // => 0
       *
       * // The `_.property` iteratee shorthand.
       * _.findIndex(users, 'active');
       * // => 2
       */
      function findIndex(array, predicate, fromIndex) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return -1;
        }
        var index = fromIndex == null ? 0 : toInteger(fromIndex);
        if (index < 0) {
          index = nativeMax(length + index, 0);
        }
        return baseFindIndex(array, getIteratee(predicate, 3), index);
      }
  
      /**
       * This method is like `_.findIndex` except that it iterates over elements
       * of `collection` from right to left.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @param {number} [fromIndex=array.length-1] The index to search from.
       * @returns {number} Returns the index of the found element, else `-1`.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'active': true },
       *   { 'user': 'fred',    'active': false },
       *   { 'user': 'pebbles', 'active': false }
       * ];
       *
       * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
       * // => 2
       *
       * // The `_.matches` iteratee shorthand.
       * _.findLastIndex(users, { 'user': 'barney', 'active': true });
       * // => 0
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.findLastIndex(users, ['active', false]);
       * // => 2
       *
       * // The `_.property` iteratee shorthand.
       * _.findLastIndex(users, 'active');
       * // => 0
       */
      function findLastIndex(array, predicate, fromIndex) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return -1;
        }
        var index = length - 1;
        if (fromIndex !== undefined) {
          index = toInteger(fromIndex);
          index = fromIndex < 0
            ? nativeMax(length + index, 0)
            : nativeMin(index, length - 1);
        }
        return baseFindIndex(array, getIteratee(predicate, 3), index, true);
      }
  
      /**
       * Flattens `array` a single level deep.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to flatten.
       * @returns {Array} Returns the new flattened array.
       * @example
       *
       * _.flatten([1, [2, [3, [4]], 5]]);
       * // => [1, 2, [3, [4]], 5]
       */
      function flatten(array) {
        var length = array == null ? 0 : array.length;
        return length ? baseFlatten(array, 1) : [];
      }
  
      /**
       * Recursively flattens `array`.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to flatten.
       * @returns {Array} Returns the new flattened array.
       * @example
       *
       * _.flattenDeep([1, [2, [3, [4]], 5]]);
       * // => [1, 2, 3, 4, 5]
       */
      function flattenDeep(array) {
        var length = array == null ? 0 : array.length;
        return length ? baseFlatten(array, INFINITY) : [];
      }
  
      /**
       * Recursively flatten `array` up to `depth` times.
       *
       * @static
       * @memberOf _
       * @since 4.4.0
       * @category Array
       * @param {Array} array The array to flatten.
       * @param {number} [depth=1] The maximum recursion depth.
       * @returns {Array} Returns the new flattened array.
       * @example
       *
       * var array = [1, [2, [3, [4]], 5]];
       *
       * _.flattenDepth(array, 1);
       * // => [1, 2, [3, [4]], 5]
       *
       * _.flattenDepth(array, 2);
       * // => [1, 2, 3, [4], 5]
       */
      function flattenDepth(array, depth) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return [];
        }
        depth = depth === undefined ? 1 : toInteger(depth);
        return baseFlatten(array, depth);
      }
  
      /**
       * The inverse of `_.toPairs`; this method returns an object composed
       * from key-value `pairs`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} pairs The key-value pairs.
       * @returns {Object} Returns the new object.
       * @example
       *
       * _.fromPairs([['a', 1], ['b', 2]]);
       * // => { 'a': 1, 'b': 2 }
       */
      function fromPairs(pairs) {
        var index = -1,
            length = pairs == null ? 0 : pairs.length,
            result = {};
  
        while (++index < length) {
          var pair = pairs[index];
          result[pair[0]] = pair[1];
        }
        return result;
      }
  
      /**
       * Gets the first element of `array`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @alias first
       * @category Array
       * @param {Array} array The array to query.
       * @returns {*} Returns the first element of `array`.
       * @example
       *
       * _.head([1, 2, 3]);
       * // => 1
       *
       * _.head([]);
       * // => undefined
       */
      function head(array) {
        return (array && array.length) ? array[0] : undefined;
      }
  
      /**
       * Gets the index at which the first occurrence of `value` is found in `array`
       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * for equality comparisons. If `fromIndex` is negative, it's used as the
       * offset from the end of `array`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {*} value The value to search for.
       * @param {number} [fromIndex=0] The index to search from.
       * @returns {number} Returns the index of the matched value, else `-1`.
       * @example
       *
       * _.indexOf([1, 2, 1, 2], 2);
       * // => 1
       *
       * // Search from the `fromIndex`.
       * _.indexOf([1, 2, 1, 2], 2, 2);
       * // => 3
       */
      function indexOf(array, value, fromIndex) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return -1;
        }
        var index = fromIndex == null ? 0 : toInteger(fromIndex);
        if (index < 0) {
          index = nativeMax(length + index, 0);
        }
        return baseIndexOf(array, value, index);
      }
  
      /**
       * Gets all but the last element of `array`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to query.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * _.initial([1, 2, 3]);
       * // => [1, 2]
       */
      function initial(array) {
        var length = array == null ? 0 : array.length;
        return length ? baseSlice(array, 0, -1) : [];
      }
  
      /**
       * Creates an array of unique values that are included in all given arrays
       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * for equality comparisons. The order and references of result values are
       * determined by the first array.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @returns {Array} Returns the new array of intersecting values.
       * @example
       *
       * _.intersection([2, 1], [2, 3]);
       * // => [2]
       */
      var intersection = baseRest(function(arrays) {
        var mapped = arrayMap(arrays, castArrayLikeObject);
        return (mapped.length && mapped[0] === arrays[0])
          ? baseIntersection(mapped)
          : [];
      });
  
      /**
       * This method is like `_.intersection` except that it accepts `iteratee`
       * which is invoked for each element of each `arrays` to generate the criterion
       * by which they're compared. The order and references of result values are
       * determined by the first array. The iteratee is invoked with one argument:
       * (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {Array} Returns the new array of intersecting values.
       * @example
       *
       * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
       * // => [2.1]
       *
       * // The `_.property` iteratee shorthand.
       * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
       * // => [{ 'x': 1 }]
       */
      var intersectionBy = baseRest(function(arrays) {
        var iteratee = last(arrays),
            mapped = arrayMap(arrays, castArrayLikeObject);
  
        if (iteratee === last(mapped)) {
          iteratee = undefined;
        } else {
          mapped.pop();
        }
        return (mapped.length && mapped[0] === arrays[0])
          ? baseIntersection(mapped, getIteratee(iteratee, 2))
          : [];
      });
  
      /**
       * This method is like `_.intersection` except that it accepts `comparator`
       * which is invoked to compare elements of `arrays`. The order and references
       * of result values are determined by the first array. The comparator is
       * invoked with two arguments: (arrVal, othVal).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new array of intersecting values.
       * @example
       *
       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
       *
       * _.intersectionWith(objects, others, _.isEqual);
       * // => [{ 'x': 1, 'y': 2 }]
       */
      var intersectionWith = baseRest(function(arrays) {
        var comparator = last(arrays),
            mapped = arrayMap(arrays, castArrayLikeObject);
  
        comparator = typeof comparator == 'function' ? comparator : undefined;
        if (comparator) {
          mapped.pop();
        }
        return (mapped.length && mapped[0] === arrays[0])
          ? baseIntersection(mapped, undefined, comparator)
          : [];
      });
  
      /**
       * Converts all elements in `array` into a string separated by `separator`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to convert.
       * @param {string} [separator=','] The element separator.
       * @returns {string} Returns the joined string.
       * @example
       *
       * _.join(['a', 'b', 'c'], '~');
       * // => 'a~b~c'
       */
      function join(array, separator) {
        return array == null ? '' : nativeJoin.call(array, separator);
      }
  
      /**
       * Gets the last element of `array`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to query.
       * @returns {*} Returns the last element of `array`.
       * @example
       *
       * _.last([1, 2, 3]);
       * // => 3
       */
      function last(array) {
        var length = array == null ? 0 : array.length;
        return length ? array[length - 1] : undefined;
      }
  
      /**
       * This method is like `_.indexOf` except that it iterates over elements of
       * `array` from right to left.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {*} value The value to search for.
       * @param {number} [fromIndex=array.length-1] The index to search from.
       * @returns {number} Returns the index of the matched value, else `-1`.
       * @example
       *
       * _.lastIndexOf([1, 2, 1, 2], 2);
       * // => 3
       *
       * // Search from the `fromIndex`.
       * _.lastIndexOf([1, 2, 1, 2], 2, 2);
       * // => 1
       */
      function lastIndexOf(array, value, fromIndex) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return -1;
        }
        var index = length;
        if (fromIndex !== undefined) {
          index = toInteger(fromIndex);
          index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
        }
        return value === value
          ? strictLastIndexOf(array, value, index)
          : baseFindIndex(array, baseIsNaN, index, true);
      }
  
      /**
       * Gets the element at index `n` of `array`. If `n` is negative, the nth
       * element from the end is returned.
       *
       * @static
       * @memberOf _
       * @since 4.11.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {number} [n=0] The index of the element to return.
       * @returns {*} Returns the nth element of `array`.
       * @example
       *
       * var array = ['a', 'b', 'c', 'd'];
       *
       * _.nth(array, 1);
       * // => 'b'
       *
       * _.nth(array, -2);
       * // => 'c';
       */
      function nth(array, n) {
        return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
      }
  
      /**
       * Removes all given values from `array` using
       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * for equality comparisons.
       *
       * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
       * to remove elements from an array by predicate.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Array
       * @param {Array} array The array to modify.
       * @param {...*} [values] The values to remove.
       * @returns {Array} Returns `array`.
       * @example
       *
       * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
       *
       * _.pull(array, 'a', 'c');
       * console.log(array);
       * // => ['b', 'b']
       */
      var pull = baseRest(pullAll);
  
      /**
       * This method is like `_.pull` except that it accepts an array of values to remove.
       *
       * **Note:** Unlike `_.difference`, this method mutates `array`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to modify.
       * @param {Array} values The values to remove.
       * @returns {Array} Returns `array`.
       * @example
       *
       * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
       *
       * _.pullAll(array, ['a', 'c']);
       * console.log(array);
       * // => ['b', 'b']
       */
      function pullAll(array, values) {
        return (array && array.length && values && values.length)
          ? basePullAll(array, values)
          : array;
      }
  
      /**
       * This method is like `_.pullAll` except that it accepts `iteratee` which is
       * invoked for each element of `array` and `values` to generate the criterion
       * by which they're compared. The iteratee is invoked with one argument: (value).
       *
       * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to modify.
       * @param {Array} values The values to remove.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {Array} Returns `array`.
       * @example
       *
       * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
       *
       * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
       * console.log(array);
       * // => [{ 'x': 2 }]
       */
      function pullAllBy(array, values, iteratee) {
        return (array && array.length && values && values.length)
          ? basePullAll(array, values, getIteratee(iteratee, 2))
          : array;
      }
  
      /**
       * This method is like `_.pullAll` except that it accepts `comparator` which
       * is invoked to compare elements of `array` to `values`. The comparator is
       * invoked with two arguments: (arrVal, othVal).
       *
       * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
       *
       * @static
       * @memberOf _
       * @since 4.6.0
       * @category Array
       * @param {Array} array The array to modify.
       * @param {Array} values The values to remove.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns `array`.
       * @example
       *
       * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
       *
       * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
       * console.log(array);
       * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
       */
      function pullAllWith(array, values, comparator) {
        return (array && array.length && values && values.length)
          ? basePullAll(array, values, undefined, comparator)
          : array;
      }
  
      /**
       * Removes elements from `array` corresponding to `indexes` and returns an
       * array of removed elements.
       *
       * **Note:** Unlike `_.at`, this method mutates `array`.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to modify.
       * @param {...(number|number[])} [indexes] The indexes of elements to remove.
       * @returns {Array} Returns the new array of removed elements.
       * @example
       *
       * var array = ['a', 'b', 'c', 'd'];
       * var pulled = _.pullAt(array, [1, 3]);
       *
       * console.log(array);
       * // => ['a', 'c']
       *
       * console.log(pulled);
       * // => ['b', 'd']
       */
      var pullAt = flatRest(function(array, indexes) {
        var length = array == null ? 0 : array.length,
            result = baseAt(array, indexes);
  
        basePullAt(array, arrayMap(indexes, function(index) {
          return isIndex(index, length) ? +index : index;
        }).sort(compareAscending));
  
        return result;
      });
  
      /**
       * Removes all elements from `array` that `predicate` returns truthy for
       * and returns an array of the removed elements. The predicate is invoked
       * with three arguments: (value, index, array).
       *
       * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
       * to pull elements from an array by value.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Array
       * @param {Array} array The array to modify.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the new array of removed elements.
       * @example
       *
       * var array = [1, 2, 3, 4];
       * var evens = _.remove(array, function(n) {
       *   return n % 2 == 0;
       * });
       *
       * console.log(array);
       * // => [1, 3]
       *
       * console.log(evens);
       * // => [2, 4]
       */
      function remove(array, predicate) {
        var result = [];
        if (!(array && array.length)) {
          return result;
        }
        var index = -1,
            indexes = [],
            length = array.length;
  
        predicate = getIteratee(predicate, 3);
        while (++index < length) {
          var value = array[index];
          if (predicate(value, index, array)) {
            result.push(value);
            indexes.push(index);
          }
        }
        basePullAt(array, indexes);
        return result;
      }
  
      /**
       * Reverses `array` so that the first element becomes the last, the second
       * element becomes the second to last, and so on.
       *
       * **Note:** This method mutates `array` and is based on
       * [`Array#reverse`](https://mdn.io/Array/reverse).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to modify.
       * @returns {Array} Returns `array`.
       * @example
       *
       * var array = [1, 2, 3];
       *
       * _.reverse(array);
       * // => [3, 2, 1]
       *
       * console.log(array);
       * // => [3, 2, 1]
       */
      function reverse(array) {
        return array == null ? array : nativeReverse.call(array);
      }
  
      /**
       * Creates a slice of `array` from `start` up to, but not including, `end`.
       *
       * **Note:** This method is used instead of
       * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
       * returned.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to slice.
       * @param {number} [start=0] The start position.
       * @param {number} [end=array.length] The end position.
       * @returns {Array} Returns the slice of `array`.
       */
      function slice(array, start, end) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return [];
        }
        if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
          start = 0;
          end = length;
        }
        else {
          start = start == null ? 0 : toInteger(start);
          end = end === undefined ? length : toInteger(end);
        }
        return baseSlice(array, start, end);
      }
  
      /**
       * Uses a binary search to determine the lowest index at which `value`
       * should be inserted into `array` in order to maintain its sort order.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The sorted array to inspect.
       * @param {*} value The value to evaluate.
       * @returns {number} Returns the index at which `value` should be inserted
       *  into `array`.
       * @example
       *
       * _.sortedIndex([30, 50], 40);
       * // => 1
       */
      function sortedIndex(array, value) {
        return baseSortedIndex(array, value);
      }
  
      /**
       * This method is like `_.sortedIndex` except that it accepts `iteratee`
       * which is invoked for `value` and each element of `array` to compute their
       * sort ranking. The iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The sorted array to inspect.
       * @param {*} value The value to evaluate.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {number} Returns the index at which `value` should be inserted
       *  into `array`.
       * @example
       *
       * var objects = [{ 'x': 4 }, { 'x': 5 }];
       *
       * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
       * // => 0
       *
       * // The `_.property` iteratee shorthand.
       * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
       * // => 0
       */
      function sortedIndexBy(array, value, iteratee) {
        return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
      }
  
      /**
       * This method is like `_.indexOf` except that it performs a binary
       * search on a sorted `array`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {*} value The value to search for.
       * @returns {number} Returns the index of the matched value, else `-1`.
       * @example
       *
       * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
       * // => 1
       */
      function sortedIndexOf(array, value) {
        var length = array == null ? 0 : array.length;
        if (length) {
          var index = baseSortedIndex(array, value);
          if (index < length && eq(array[index], value)) {
            return index;
          }
        }
        return -1;
      }
  
      /**
       * This method is like `_.sortedIndex` except that it returns the highest
       * index at which `value` should be inserted into `array` in order to
       * maintain its sort order.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The sorted array to inspect.
       * @param {*} value The value to evaluate.
       * @returns {number} Returns the index at which `value` should be inserted
       *  into `array`.
       * @example
       *
       * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
       * // => 4
       */
      function sortedLastIndex(array, value) {
        return baseSortedIndex(array, value, true);
      }
  
      /**
       * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
       * which is invoked for `value` and each element of `array` to compute their
       * sort ranking. The iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The sorted array to inspect.
       * @param {*} value The value to evaluate.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {number} Returns the index at which `value` should be inserted
       *  into `array`.
       * @example
       *
       * var objects = [{ 'x': 4 }, { 'x': 5 }];
       *
       * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
       * // => 1
       *
       * // The `_.property` iteratee shorthand.
       * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
       * // => 1
       */
      function sortedLastIndexBy(array, value, iteratee) {
        return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
      }
  
      /**
       * This method is like `_.lastIndexOf` except that it performs a binary
       * search on a sorted `array`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {*} value The value to search for.
       * @returns {number} Returns the index of the matched value, else `-1`.
       * @example
       *
       * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
       * // => 3
       */
      function sortedLastIndexOf(array, value) {
        var length = array == null ? 0 : array.length;
        if (length) {
          var index = baseSortedIndex(array, value, true) - 1;
          if (eq(array[index], value)) {
            return index;
          }
        }
        return -1;
      }
  
      /**
       * This method is like `_.uniq` except that it's designed and optimized
       * for sorted arrays.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @returns {Array} Returns the new duplicate free array.
       * @example
       *
       * _.sortedUniq([1, 1, 2]);
       * // => [1, 2]
       */
      function sortedUniq(array) {
        return (array && array.length)
          ? baseSortedUniq(array)
          : [];
      }
  
      /**
       * This method is like `_.uniqBy` except that it's designed and optimized
       * for sorted arrays.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {Function} [iteratee] The iteratee invoked per element.
       * @returns {Array} Returns the new duplicate free array.
       * @example
       *
       * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
       * // => [1.1, 2.3]
       */
      function sortedUniqBy(array, iteratee) {
        return (array && array.length)
          ? baseSortedUniq(array, getIteratee(iteratee, 2))
          : [];
      }
  
      /**
       * Gets all but the first element of `array`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to query.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * _.tail([1, 2, 3]);
       * // => [2, 3]
       */
      function tail(array) {
        var length = array == null ? 0 : array.length;
        return length ? baseSlice(array, 1, length) : [];
      }
  
      /**
       * Creates a slice of `array` with `n` elements taken from the beginning.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {number} [n=1] The number of elements to take.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * _.take([1, 2, 3]);
       * // => [1]
       *
       * _.take([1, 2, 3], 2);
       * // => [1, 2]
       *
       * _.take([1, 2, 3], 5);
       * // => [1, 2, 3]
       *
       * _.take([1, 2, 3], 0);
       * // => []
       */
      function take(array, n, guard) {
        if (!(array && array.length)) {
          return [];
        }
        n = (guard || n === undefined) ? 1 : toInteger(n);
        return baseSlice(array, 0, n < 0 ? 0 : n);
      }
  
      /**
       * Creates a slice of `array` with `n` elements taken from the end.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {number} [n=1] The number of elements to take.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * _.takeRight([1, 2, 3]);
       * // => [3]
       *
       * _.takeRight([1, 2, 3], 2);
       * // => [2, 3]
       *
       * _.takeRight([1, 2, 3], 5);
       * // => [1, 2, 3]
       *
       * _.takeRight([1, 2, 3], 0);
       * // => []
       */
      function takeRight(array, n, guard) {
        var length = array == null ? 0 : array.length;
        if (!length) {
          return [];
        }
        n = (guard || n === undefined) ? 1 : toInteger(n);
        n = length - n;
        return baseSlice(array, n < 0 ? 0 : n, length);
      }
  
      /**
       * Creates a slice of `array` with elements taken from the end. Elements are
       * taken until `predicate` returns falsey. The predicate is invoked with
       * three arguments: (value, index, array).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'active': true },
       *   { 'user': 'fred',    'active': false },
       *   { 'user': 'pebbles', 'active': false }
       * ];
       *
       * _.takeRightWhile(users, function(o) { return !o.active; });
       * // => objects for ['fred', 'pebbles']
       *
       * // The `_.matches` iteratee shorthand.
       * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
       * // => objects for ['pebbles']
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.takeRightWhile(users, ['active', false]);
       * // => objects for ['fred', 'pebbles']
       *
       * // The `_.property` iteratee shorthand.
       * _.takeRightWhile(users, 'active');
       * // => []
       */
      function takeRightWhile(array, predicate) {
        return (array && array.length)
          ? baseWhile(array, getIteratee(predicate, 3), false, true)
          : [];
      }
  
      /**
       * Creates a slice of `array` with elements taken from the beginning. Elements
       * are taken until `predicate` returns falsey. The predicate is invoked with
       * three arguments: (value, index, array).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Array
       * @param {Array} array The array to query.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the slice of `array`.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'active': false },
       *   { 'user': 'fred',    'active': false },
       *   { 'user': 'pebbles', 'active': true }
       * ];
       *
       * _.takeWhile(users, function(o) { return !o.active; });
       * // => objects for ['barney', 'fred']
       *
       * // The `_.matches` iteratee shorthand.
       * _.takeWhile(users, { 'user': 'barney', 'active': false });
       * // => objects for ['barney']
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.takeWhile(users, ['active', false]);
       * // => objects for ['barney', 'fred']
       *
       * // The `_.property` iteratee shorthand.
       * _.takeWhile(users, 'active');
       * // => []
       */
      function takeWhile(array, predicate) {
        return (array && array.length)
          ? baseWhile(array, getIteratee(predicate, 3))
          : [];
      }
  
      /**
       * Creates an array of unique values, in order, from all given arrays using
       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * for equality comparisons.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @returns {Array} Returns the new array of combined values.
       * @example
       *
       * _.union([2], [1, 2]);
       * // => [2, 1]
       */
      var union = baseRest(function(arrays) {
        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
      });
  
      /**
       * This method is like `_.union` except that it accepts `iteratee` which is
       * invoked for each element of each `arrays` to generate the criterion by
       * which uniqueness is computed. Result values are chosen from the first
       * array in which the value occurs. The iteratee is invoked with one argument:
       * (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {Array} Returns the new array of combined values.
       * @example
       *
       * _.unionBy([2.1], [1.2, 2.3], Math.floor);
       * // => [2.1, 1.2]
       *
       * // The `_.property` iteratee shorthand.
       * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
       * // => [{ 'x': 1 }, { 'x': 2 }]
       */
      var unionBy = baseRest(function(arrays) {
        var iteratee = last(arrays);
        if (isArrayLikeObject(iteratee)) {
          iteratee = undefined;
        }
        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
      });
  
      /**
       * This method is like `_.union` except that it accepts `comparator` which
       * is invoked to compare elements of `arrays`. Result values are chosen from
       * the first array in which the value occurs. The comparator is invoked
       * with two arguments: (arrVal, othVal).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new array of combined values.
       * @example
       *
       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
       *
       * _.unionWith(objects, others, _.isEqual);
       * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
       */
      var unionWith = baseRest(function(arrays) {
        var comparator = last(arrays);
        comparator = typeof comparator == 'function' ? comparator : undefined;
        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
      });
  
      /**
       * Creates a duplicate-free version of an array, using
       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * for equality comparisons, in which only the first occurrence of each element
       * is kept. The order of result values is determined by the order they occur
       * in the array.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @returns {Array} Returns the new duplicate free array.
       * @example
       *
       * _.uniq([2, 1, 2]);
       * // => [2, 1]
       */
      function uniq(array) {
        return (array && array.length) ? baseUniq(array) : [];
      }
  
      /**
       * This method is like `_.uniq` except that it accepts `iteratee` which is
       * invoked for each element in `array` to generate the criterion by which
       * uniqueness is computed. The order of result values is determined by the
       * order they occur in the array. The iteratee is invoked with one argument:
       * (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {Array} Returns the new duplicate free array.
       * @example
       *
       * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
       * // => [2.1, 1.2]
       *
       * // The `_.property` iteratee shorthand.
       * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
       * // => [{ 'x': 1 }, { 'x': 2 }]
       */
      function uniqBy(array, iteratee) {
        return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
      }
  
      /**
       * This method is like `_.uniq` except that it accepts `comparator` which
       * is invoked to compare elements of `array`. The order of result values is
       * determined by the order they occur in the array.The comparator is invoked
       * with two arguments: (arrVal, othVal).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new duplicate free array.
       * @example
       *
       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
       *
       * _.uniqWith(objects, _.isEqual);
       * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
       */
      function uniqWith(array, comparator) {
        comparator = typeof comparator == 'function' ? comparator : undefined;
        return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
      }
  
      /**
       * This method is like `_.zip` except that it accepts an array of grouped
       * elements and creates an array regrouping the elements to their pre-zip
       * configuration.
       *
       * @static
       * @memberOf _
       * @since 1.2.0
       * @category Array
       * @param {Array} array The array of grouped elements to process.
       * @returns {Array} Returns the new array of regrouped elements.
       * @example
       *
       * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
       * // => [['a', 1, true], ['b', 2, false]]
       *
       * _.unzip(zipped);
       * // => [['a', 'b'], [1, 2], [true, false]]
       */
      function unzip(array) {
        if (!(array && array.length)) {
          return [];
        }
        var length = 0;
        array = arrayFilter(array, function(group) {
          if (isArrayLikeObject(group)) {
            length = nativeMax(group.length, length);
            return true;
          }
        });
        return baseTimes(length, function(index) {
          return arrayMap(array, baseProperty(index));
        });
      }
  
      /**
       * This method is like `_.unzip` except that it accepts `iteratee` to specify
       * how regrouped values should be combined. The iteratee is invoked with the
       * elements of each group: (...group).
       *
       * @static
       * @memberOf _
       * @since 3.8.0
       * @category Array
       * @param {Array} array The array of grouped elements to process.
       * @param {Function} [iteratee=_.identity] The function to combine
       *  regrouped values.
       * @returns {Array} Returns the new array of regrouped elements.
       * @example
       *
       * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
       * // => [[1, 10, 100], [2, 20, 200]]
       *
       * _.unzipWith(zipped, _.add);
       * // => [3, 30, 300]
       */
      function unzipWith(array, iteratee) {
        if (!(array && array.length)) {
          return [];
        }
        var result = unzip(array);
        if (iteratee == null) {
          return result;
        }
        return arrayMap(result, function(group) {
          return apply(iteratee, undefined, group);
        });
      }
  
      /**
       * Creates an array excluding all given values using
       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * for equality comparisons.
       *
       * **Note:** Unlike `_.pull`, this method returns a new array.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {Array} array The array to inspect.
       * @param {...*} [values] The values to exclude.
       * @returns {Array} Returns the new array of filtered values.
       * @see _.difference, _.xor
       * @example
       *
       * _.without([2, 1, 2, 3], 1, 2);
       * // => [3]
       */
      var without = baseRest(function(array, values) {
        return isArrayLikeObject(array)
          ? baseDifference(array, values)
          : [];
      });
  
      /**
       * Creates an array of unique values that is the
       * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
       * of the given arrays. The order of result values is determined by the order
       * they occur in the arrays.
       *
       * @static
       * @memberOf _
       * @since 2.4.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @returns {Array} Returns the new array of filtered values.
       * @see _.difference, _.without
       * @example
       *
       * _.xor([2, 1], [2, 3]);
       * // => [1, 3]
       */
      var xor = baseRest(function(arrays) {
        return baseXor(arrayFilter(arrays, isArrayLikeObject));
      });
  
      /**
       * This method is like `_.xor` except that it accepts `iteratee` which is
       * invoked for each element of each `arrays` to generate the criterion by
       * which by which they're compared. The order of result values is determined
       * by the order they occur in the arrays. The iteratee is invoked with one
       * argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {Array} Returns the new array of filtered values.
       * @example
       *
       * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
       * // => [1.2, 3.4]
       *
       * // The `_.property` iteratee shorthand.
       * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
       * // => [{ 'x': 2 }]
       */
      var xorBy = baseRest(function(arrays) {
        var iteratee = last(arrays);
        if (isArrayLikeObject(iteratee)) {
          iteratee = undefined;
        }
        return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
      });
  
      /**
       * This method is like `_.xor` except that it accepts `comparator` which is
       * invoked to compare elements of `arrays`. The order of result values is
       * determined by the order they occur in the arrays. The comparator is invoked
       * with two arguments: (arrVal, othVal).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Array
       * @param {...Array} [arrays] The arrays to inspect.
       * @param {Function} [comparator] The comparator invoked per element.
       * @returns {Array} Returns the new array of filtered values.
       * @example
       *
       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
       *
       * _.xorWith(objects, others, _.isEqual);
       * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
       */
      var xorWith = baseRest(function(arrays) {
        var comparator = last(arrays);
        comparator = typeof comparator == 'function' ? comparator : undefined;
        return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
      });
  
      /**
       * Creates an array of grouped elements, the first of which contains the
       * first elements of the given arrays, the second of which contains the
       * second elements of the given arrays, and so on.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Array
       * @param {...Array} [arrays] The arrays to process.
       * @returns {Array} Returns the new array of grouped elements.
       * @example
       *
       * _.zip(['a', 'b'], [1, 2], [true, false]);
       * // => [['a', 1, true], ['b', 2, false]]
       */
      var zip = baseRest(unzip);
  
      /**
       * This method is like `_.fromPairs` except that it accepts two arrays,
       * one of property identifiers and one of corresponding values.
       *
       * @static
       * @memberOf _
       * @since 0.4.0
       * @category Array
       * @param {Array} [props=[]] The property identifiers.
       * @param {Array} [values=[]] The property values.
       * @returns {Object} Returns the new object.
       * @example
       *
       * _.zipObject(['a', 'b'], [1, 2]);
       * // => { 'a': 1, 'b': 2 }
       */
      function zipObject(props, values) {
        return baseZipObject(props || [], values || [], assignValue);
      }
  
      /**
       * This method is like `_.zipObject` except that it supports property paths.
       *
       * @static
       * @memberOf _
       * @since 4.1.0
       * @category Array
       * @param {Array} [props=[]] The property identifiers.
       * @param {Array} [values=[]] The property values.
       * @returns {Object} Returns the new object.
       * @example
       *
       * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
       * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
       */
      function zipObjectDeep(props, values) {
        return baseZipObject(props || [], values || [], baseSet);
      }
  
      /**
       * This method is like `_.zip` except that it accepts `iteratee` to specify
       * how grouped values should be combined. The iteratee is invoked with the
       * elements of each group: (...group).
       *
       * @static
       * @memberOf _
       * @since 3.8.0
       * @category Array
       * @param {...Array} [arrays] The arrays to process.
       * @param {Function} [iteratee=_.identity] The function to combine
       *  grouped values.
       * @returns {Array} Returns the new array of grouped elements.
       * @example
       *
       * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
       *   return a + b + c;
       * });
       * // => [111, 222]
       */
      var zipWith = baseRest(function(arrays) {
        var length = arrays.length,
            iteratee = length > 1 ? arrays[length - 1] : undefined;
  
        iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
        return unzipWith(arrays, iteratee);
      });
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates a `lodash` wrapper instance that wraps `value` with explicit method
       * chain sequences enabled. The result of such sequences must be unwrapped
       * with `_#value`.
       *
       * @static
       * @memberOf _
       * @since 1.3.0
       * @category Seq
       * @param {*} value The value to wrap.
       * @returns {Object} Returns the new `lodash` wrapper instance.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'age': 36 },
       *   { 'user': 'fred',    'age': 40 },
       *   { 'user': 'pebbles', 'age': 1 }
       * ];
       *
       * var youngest = _
       *   .chain(users)
       *   .sortBy('age')
       *   .map(function(o) {
       *     return o.user + ' is ' + o.age;
       *   })
       *   .head()
       *   .value();
       * // => 'pebbles is 1'
       */
      function chain(value) {
        var result = lodash(value);
        result.__chain__ = true;
        return result;
      }
  
      /**
       * This method invokes `interceptor` and returns `value`. The interceptor
       * is invoked with one argument; (value). The purpose of this method is to
       * "tap into" a method chain sequence in order to modify intermediate results.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Seq
       * @param {*} value The value to provide to `interceptor`.
       * @param {Function} interceptor The function to invoke.
       * @returns {*} Returns `value`.
       * @example
       *
       * _([1, 2, 3])
       *  .tap(function(array) {
       *    // Mutate input array.
       *    array.pop();
       *  })
       *  .reverse()
       *  .value();
       * // => [2, 1]
       */
      function tap(value, interceptor) {
        interceptor(value);
        return value;
      }
  
      /**
       * This method is like `_.tap` except that it returns the result of `interceptor`.
       * The purpose of this method is to "pass thru" values replacing intermediate
       * results in a method chain sequence.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Seq
       * @param {*} value The value to provide to `interceptor`.
       * @param {Function} interceptor The function to invoke.
       * @returns {*} Returns the result of `interceptor`.
       * @example
       *
       * _('  abc  ')
       *  .chain()
       *  .trim()
       *  .thru(function(value) {
       *    return [value];
       *  })
       *  .value();
       * // => ['abc']
       */
      function thru(value, interceptor) {
        return interceptor(value);
      }
  
      /**
       * This method is the wrapper version of `_.at`.
       *
       * @name at
       * @memberOf _
       * @since 1.0.0
       * @category Seq
       * @param {...(string|string[])} [paths] The property paths to pick.
       * @returns {Object} Returns the new `lodash` wrapper instance.
       * @example
       *
       * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
       *
       * _(object).at(['a[0].b.c', 'a[1]']).value();
       * // => [3, 4]
       */
      var wrapperAt = flatRest(function(paths) {
        var length = paths.length,
            start = length ? paths[0] : 0,
            value = this.__wrapped__,
            interceptor = function(object) { return baseAt(object, paths); };
  
        if (length > 1 || this.__actions__.length ||
            !(value instanceof LazyWrapper) || !isIndex(start)) {
          return this.thru(interceptor);
        }
        value = value.slice(start, +start + (length ? 1 : 0));
        value.__actions__.push({
          'func': thru,
          'args': [interceptor],
          'thisArg': undefined
        });
        return new LodashWrapper(value, this.__chain__).thru(function(array) {
          if (length && !array.length) {
            array.push(undefined);
          }
          return array;
        });
      });
  
      /**
       * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
       *
       * @name chain
       * @memberOf _
       * @since 0.1.0
       * @category Seq
       * @returns {Object} Returns the new `lodash` wrapper instance.
       * @example
       *
       * var users = [
       *   { 'user': 'barney', 'age': 36 },
       *   { 'user': 'fred',   'age': 40 }
       * ];
       *
       * // A sequence without explicit chaining.
       * _(users).head();
       * // => { 'user': 'barney', 'age': 36 }
       *
       * // A sequence with explicit chaining.
       * _(users)
       *   .chain()
       *   .head()
       *   .pick('user')
       *   .value();
       * // => { 'user': 'barney' }
       */
      function wrapperChain() {
        return chain(this);
      }
  
      /**
       * Executes the chain sequence and returns the wrapped result.
       *
       * @name commit
       * @memberOf _
       * @since 3.2.0
       * @category Seq
       * @returns {Object} Returns the new `lodash` wrapper instance.
       * @example
       *
       * var array = [1, 2];
       * var wrapped = _(array).push(3);
       *
       * console.log(array);
       * // => [1, 2]
       *
       * wrapped = wrapped.commit();
       * console.log(array);
       * // => [1, 2, 3]
       *
       * wrapped.last();
       * // => 3
       *
       * console.log(array);
       * // => [1, 2, 3]
       */
      function wrapperCommit() {
        return new LodashWrapper(this.value(), this.__chain__);
      }
  
      /**
       * Gets the next value on a wrapped object following the
       * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
       *
       * @name next
       * @memberOf _
       * @since 4.0.0
       * @category Seq
       * @returns {Object} Returns the next iterator value.
       * @example
       *
       * var wrapped = _([1, 2]);
       *
       * wrapped.next();
       * // => { 'done': false, 'value': 1 }
       *
       * wrapped.next();
       * // => { 'done': false, 'value': 2 }
       *
       * wrapped.next();
       * // => { 'done': true, 'value': undefined }
       */
      function wrapperNext() {
        if (this.__values__ === undefined) {
          this.__values__ = toArray(this.value());
        }
        var done = this.__index__ >= this.__values__.length,
            value = done ? undefined : this.__values__[this.__index__++];
  
        return { 'done': done, 'value': value };
      }
  
      /**
       * Enables the wrapper to be iterable.
       *
       * @name Symbol.iterator
       * @memberOf _
       * @since 4.0.0
       * @category Seq
       * @returns {Object} Returns the wrapper object.
       * @example
       *
       * var wrapped = _([1, 2]);
       *
       * wrapped[Symbol.iterator]() === wrapped;
       * // => true
       *
       * Array.from(wrapped);
       * // => [1, 2]
       */
      function wrapperToIterator() {
        return this;
      }
  
      /**
       * Creates a clone of the chain sequence planting `value` as the wrapped value.
       *
       * @name plant
       * @memberOf _
       * @since 3.2.0
       * @category Seq
       * @param {*} value The value to plant.
       * @returns {Object} Returns the new `lodash` wrapper instance.
       * @example
       *
       * function square(n) {
       *   return n * n;
       * }
       *
       * var wrapped = _([1, 2]).map(square);
       * var other = wrapped.plant([3, 4]);
       *
       * other.value();
       * // => [9, 16]
       *
       * wrapped.value();
       * // => [1, 4]
       */
      function wrapperPlant(value) {
        var result,
            parent = this;
  
        while (parent instanceof baseLodash) {
          var clone = wrapperClone(parent);
          clone.__index__ = 0;
          clone.__values__ = undefined;
          if (result) {
            previous.__wrapped__ = clone;
          } else {
            result = clone;
          }
          var previous = clone;
          parent = parent.__wrapped__;
        }
        previous.__wrapped__ = value;
        return result;
      }
  
      /**
       * This method is the wrapper version of `_.reverse`.
       *
       * **Note:** This method mutates the wrapped array.
       *
       * @name reverse
       * @memberOf _
       * @since 0.1.0
       * @category Seq
       * @returns {Object} Returns the new `lodash` wrapper instance.
       * @example
       *
       * var array = [1, 2, 3];
       *
       * _(array).reverse().value()
       * // => [3, 2, 1]
       *
       * console.log(array);
       * // => [3, 2, 1]
       */
      function wrapperReverse() {
        var value = this.__wrapped__;
        if (value instanceof LazyWrapper) {
          var wrapped = value;
          if (this.__actions__.length) {
            wrapped = new LazyWrapper(this);
          }
          wrapped = wrapped.reverse();
          wrapped.__actions__.push({
            'func': thru,
            'args': [reverse],
            'thisArg': undefined
          });
          return new LodashWrapper(wrapped, this.__chain__);
        }
        return this.thru(reverse);
      }
  
      /**
       * Executes the chain sequence to resolve the unwrapped value.
       *
       * @name value
       * @memberOf _
       * @since 0.1.0
       * @alias toJSON, valueOf
       * @category Seq
       * @returns {*} Returns the resolved unwrapped value.
       * @example
       *
       * _([1, 2, 3]).value();
       * // => [1, 2, 3]
       */
      function wrapperValue() {
        return baseWrapperValue(this.__wrapped__, this.__actions__);
      }
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Creates an object composed of keys generated from the results of running
       * each element of `collection` thru `iteratee`. The corresponding value of
       * each key is the number of times the key was returned by `iteratee`. The
       * iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 0.5.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
       * @returns {Object} Returns the composed aggregate object.
       * @example
       *
       * _.countBy([6.1, 4.2, 6.3], Math.floor);
       * // => { '4': 1, '6': 2 }
       *
       * // The `_.property` iteratee shorthand.
       * _.countBy(['one', 'two', 'three'], 'length');
       * // => { '3': 2, '5': 1 }
       */
      var countBy = createAggregator(function(result, value, key) {
        if (hasOwnProperty.call(result, key)) {
          ++result[key];
        } else {
          baseAssignValue(result, key, 1);
        }
      });
  
      /**
       * Checks if `predicate` returns truthy for **all** elements of `collection`.
       * Iteration is stopped once `predicate` returns falsey. The predicate is
       * invoked with three arguments: (value, index|key, collection).
       *
       * **Note:** This method returns `true` for
       * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
       * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
       * elements of empty collections.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {boolean} Returns `true` if all elements pass the predicate check,
       *  else `false`.
       * @example
       *
       * _.every([true, 1, null, 'yes'], Boolean);
       * // => false
       *
       * var users = [
       *   { 'user': 'barney', 'age': 36, 'active': false },
       *   { 'user': 'fred',   'age': 40, 'active': false }
       * ];
       *
       * // The `_.matches` iteratee shorthand.
       * _.every(users, { 'user': 'barney', 'active': false });
       * // => false
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.every(users, ['active', false]);
       * // => true
       *
       * // The `_.property` iteratee shorthand.
       * _.every(users, 'active');
       * // => false
       */
      function every(collection, predicate, guard) {
        var func = isArray(collection) ? arrayEvery : baseEvery;
        if (guard && isIterateeCall(collection, predicate, guard)) {
          predicate = undefined;
        }
        return func(collection, getIteratee(predicate, 3));
      }
  
      /**
       * Iterates over elements of `collection`, returning an array of all elements
       * `predicate` returns truthy for. The predicate is invoked with three
       * arguments: (value, index|key, collection).
       *
       * **Note:** Unlike `_.remove`, this method returns a new array.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the new filtered array.
       * @see _.reject
       * @example
       *
       * var users = [
       *   { 'user': 'barney', 'age': 36, 'active': true },
       *   { 'user': 'fred',   'age': 40, 'active': false }
       * ];
       *
       * _.filter(users, function(o) { return !o.active; });
       * // => objects for ['fred']
       *
       * // The `_.matches` iteratee shorthand.
       * _.filter(users, { 'age': 36, 'active': true });
       * // => objects for ['barney']
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.filter(users, ['active', false]);
       * // => objects for ['fred']
       *
       * // The `_.property` iteratee shorthand.
       * _.filter(users, 'active');
       * // => objects for ['barney']
       */
      function filter(collection, predicate) {
        var func = isArray(collection) ? arrayFilter : baseFilter;
        return func(collection, getIteratee(predicate, 3));
      }
  
      /**
       * Iterates over elements of `collection`, returning the first element
       * `predicate` returns truthy for. The predicate is invoked with three
       * arguments: (value, index|key, collection).
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to inspect.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @param {number} [fromIndex=0] The index to search from.
       * @returns {*} Returns the matched element, else `undefined`.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'age': 36, 'active': true },
       *   { 'user': 'fred',    'age': 40, 'active': false },
       *   { 'user': 'pebbles', 'age': 1,  'active': true }
       * ];
       *
       * _.find(users, function(o) { return o.age < 40; });
       * // => object for 'barney'
       *
       * // The `_.matches` iteratee shorthand.
       * _.find(users, { 'age': 1, 'active': true });
       * // => object for 'pebbles'
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.find(users, ['active', false]);
       * // => object for 'fred'
       *
       * // The `_.property` iteratee shorthand.
       * _.find(users, 'active');
       * // => object for 'barney'
       */
      var find = createFind(findIndex);
  
      /**
       * This method is like `_.find` except that it iterates over elements of
       * `collection` from right to left.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Collection
       * @param {Array|Object} collection The collection to inspect.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @param {number} [fromIndex=collection.length-1] The index to search from.
       * @returns {*} Returns the matched element, else `undefined`.
       * @example
       *
       * _.findLast([1, 2, 3, 4], function(n) {
       *   return n % 2 == 1;
       * });
       * // => 3
       */
      var findLast = createFind(findLastIndex);
  
      /**
       * Creates a flattened array of values by running each element in `collection`
       * thru `iteratee` and flattening the mapped results. The iteratee is invoked
       * with three arguments: (value, index|key, collection).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the new flattened array.
       * @example
       *
       * function duplicate(n) {
       *   return [n, n];
       * }
       *
       * _.flatMap([1, 2], duplicate);
       * // => [1, 1, 2, 2]
       */
      function flatMap(collection, iteratee) {
        return baseFlatten(map(collection, iteratee), 1);
      }
  
      /**
       * This method is like `_.flatMap` except that it recursively flattens the
       * mapped results.
       *
       * @static
       * @memberOf _
       * @since 4.7.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the new flattened array.
       * @example
       *
       * function duplicate(n) {
       *   return [[[n, n]]];
       * }
       *
       * _.flatMapDeep([1, 2], duplicate);
       * // => [1, 1, 2, 2]
       */
      function flatMapDeep(collection, iteratee) {
        return baseFlatten(map(collection, iteratee), INFINITY);
      }
  
      /**
       * This method is like `_.flatMap` except that it recursively flattens the
       * mapped results up to `depth` times.
       *
       * @static
       * @memberOf _
       * @since 4.7.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @param {number} [depth=1] The maximum recursion depth.
       * @returns {Array} Returns the new flattened array.
       * @example
       *
       * function duplicate(n) {
       *   return [[[n, n]]];
       * }
       *
       * _.flatMapDepth([1, 2], duplicate, 2);
       * // => [[1, 1], [2, 2]]
       */
      function flatMapDepth(collection, iteratee, depth) {
        depth = depth === undefined ? 1 : toInteger(depth);
        return baseFlatten(map(collection, iteratee), depth);
      }
  
      /**
       * Iterates over elements of `collection` and invokes `iteratee` for each element.
       * The iteratee is invoked with three arguments: (value, index|key, collection).
       * Iteratee functions may exit iteration early by explicitly returning `false`.
       *
       * **Note:** As with other "Collections" methods, objects with a "length"
       * property are iterated like arrays. To avoid this behavior use `_.forIn`
       * or `_.forOwn` for object iteration.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @alias each
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Array|Object} Returns `collection`.
       * @see _.forEachRight
       * @example
       *
       * _.forEach([1, 2], function(value) {
       *   console.log(value);
       * });
       * // => Logs `1` then `2`.
       *
       * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
       *   console.log(key);
       * });
       * // => Logs 'a' then 'b' (iteration order is not guaranteed).
       */
      function forEach(collection, iteratee) {
        var func = isArray(collection) ? arrayEach : baseEach;
        return func(collection, getIteratee(iteratee, 3));
      }
  
      /**
       * This method is like `_.forEach` except that it iterates over elements of
       * `collection` from right to left.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @alias eachRight
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Array|Object} Returns `collection`.
       * @see _.forEach
       * @example
       *
       * _.forEachRight([1, 2], function(value) {
       *   console.log(value);
       * });
       * // => Logs `2` then `1`.
       */
      function forEachRight(collection, iteratee) {
        var func = isArray(collection) ? arrayEachRight : baseEachRight;
        return func(collection, getIteratee(iteratee, 3));
      }
  
      /**
       * Creates an object composed of keys generated from the results of running
       * each element of `collection` thru `iteratee`. The order of grouped values
       * is determined by the order they occur in `collection`. The corresponding
       * value of each key is an array of elements responsible for generating the
       * key. The iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
       * @returns {Object} Returns the composed aggregate object.
       * @example
       *
       * _.groupBy([6.1, 4.2, 6.3], Math.floor);
       * // => { '4': [4.2], '6': [6.1, 6.3] }
       *
       * // The `_.property` iteratee shorthand.
       * _.groupBy(['one', 'two', 'three'], 'length');
       * // => { '3': ['one', 'two'], '5': ['three'] }
       */
      var groupBy = createAggregator(function(result, value, key) {
        if (hasOwnProperty.call(result, key)) {
          result[key].push(value);
        } else {
          baseAssignValue(result, key, [value]);
        }
      });
  
      /**
       * Checks if `value` is in `collection`. If `collection` is a string, it's
       * checked for a substring of `value`, otherwise
       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * is used for equality comparisons. If `fromIndex` is negative, it's used as
       * the offset from the end of `collection`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object|string} collection The collection to inspect.
       * @param {*} value The value to search for.
       * @param {number} [fromIndex=0] The index to search from.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
       * @returns {boolean} Returns `true` if `value` is found, else `false`.
       * @example
       *
       * _.includes([1, 2, 3], 1);
       * // => true
       *
       * _.includes([1, 2, 3], 1, 2);
       * // => false
       *
       * _.includes({ 'a': 1, 'b': 2 }, 1);
       * // => true
       *
       * _.includes('abcd', 'bc');
       * // => true
       */
      function includes(collection, value, fromIndex, guard) {
        collection = isArrayLike(collection) ? collection : values(collection);
        fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
  
        var length = collection.length;
        if (fromIndex < 0) {
          fromIndex = nativeMax(length + fromIndex, 0);
        }
        return isString(collection)
          ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
          : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
      }
  
      /**
       * Invokes the method at `path` of each element in `collection`, returning
       * an array of the results of each invoked method. Any additional arguments
       * are provided to each invoked method. If `path` is a function, it's invoked
       * for, and `this` bound to, each element in `collection`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Array|Function|string} path The path of the method to invoke or
       *  the function invoked per iteration.
       * @param {...*} [args] The arguments to invoke each method with.
       * @returns {Array} Returns the array of results.
       * @example
       *
       * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
       * // => [[1, 5, 7], [1, 2, 3]]
       *
       * _.invokeMap([123, 456], String.prototype.split, '');
       * // => [['1', '2', '3'], ['4', '5', '6']]
       */
      var invokeMap = baseRest(function(collection, path, args) {
        var index = -1,
            isFunc = typeof path == 'function',
            result = isArrayLike(collection) ? Array(collection.length) : [];
  
        baseEach(collection, function(value) {
          result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
        });
        return result;
      });
  
      /**
       * Creates an object composed of keys generated from the results of running
       * each element of `collection` thru `iteratee`. The corresponding value of
       * each key is the last element responsible for generating the key. The
       * iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
       * @returns {Object} Returns the composed aggregate object.
       * @example
       *
       * var array = [
       *   { 'dir': 'left', 'code': 97 },
       *   { 'dir': 'right', 'code': 100 }
       * ];
       *
       * _.keyBy(array, function(o) {
       *   return String.fromCharCode(o.code);
       * });
       * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
       *
       * _.keyBy(array, 'dir');
       * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
       */
      var keyBy = createAggregator(function(result, value, key) {
        baseAssignValue(result, key, value);
      });
  
      /**
       * Creates an array of values by running each element in `collection` thru
       * `iteratee`. The iteratee is invoked with three arguments:
       * (value, index|key, collection).
       *
       * Many lodash methods are guarded to work as iteratees for methods like
       * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
       *
       * The guarded methods are:
       * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
       * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
       * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
       * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the new mapped array.
       * @example
       *
       * function square(n) {
       *   return n * n;
       * }
       *
       * _.map([4, 8], square);
       * // => [16, 64]
       *
       * _.map({ 'a': 4, 'b': 8 }, square);
       * // => [16, 64] (iteration order is not guaranteed)
       *
       * var users = [
       *   { 'user': 'barney' },
       *   { 'user': 'fred' }
       * ];
       *
       * // The `_.property` iteratee shorthand.
       * _.map(users, 'user');
       * // => ['barney', 'fred']
       */
      function map(collection, iteratee) {
        var func = isArray(collection) ? arrayMap : baseMap;
        return func(collection, getIteratee(iteratee, 3));
      }
  
      /**
       * This method is like `_.sortBy` except that it allows specifying the sort
       * orders of the iteratees to sort by. If `orders` is unspecified, all values
       * are sorted in ascending order. Otherwise, specify an order of "desc" for
       * descending or "asc" for ascending sort order of corresponding values.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
       *  The iteratees to sort by.
       * @param {string[]} [orders] The sort orders of `iteratees`.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
       * @returns {Array} Returns the new sorted array.
       * @example
       *
       * var users = [
       *   { 'user': 'fred',   'age': 48 },
       *   { 'user': 'barney', 'age': 34 },
       *   { 'user': 'fred',   'age': 40 },
       *   { 'user': 'barney', 'age': 36 }
       * ];
       *
       * // Sort by `user` in ascending order and by `age` in descending order.
       * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
       * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
       */
      function orderBy(collection, iteratees, orders, guard) {
        if (collection == null) {
          return [];
        }
        if (!isArray(iteratees)) {
          iteratees = iteratees == null ? [] : [iteratees];
        }
        orders = guard ? undefined : orders;
        if (!isArray(orders)) {
          orders = orders == null ? [] : [orders];
        }
        return baseOrderBy(collection, iteratees, orders);
      }
  
      /**
       * Creates an array of elements split into two groups, the first of which
       * contains elements `predicate` returns truthy for, the second of which
       * contains elements `predicate` returns falsey for. The predicate is
       * invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the array of grouped elements.
       * @example
       *
       * var users = [
       *   { 'user': 'barney',  'age': 36, 'active': false },
       *   { 'user': 'fred',    'age': 40, 'active': true },
       *   { 'user': 'pebbles', 'age': 1,  'active': false }
       * ];
       *
       * _.partition(users, function(o) { return o.active; });
       * // => objects for [['fred'], ['barney', 'pebbles']]
       *
       * // The `_.matches` iteratee shorthand.
       * _.partition(users, { 'age': 1, 'active': false });
       * // => objects for [['pebbles'], ['barney', 'fred']]
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.partition(users, ['active', false]);
       * // => objects for [['barney', 'pebbles'], ['fred']]
       *
       * // The `_.property` iteratee shorthand.
       * _.partition(users, 'active');
       * // => objects for [['fred'], ['barney', 'pebbles']]
       */
      var partition = createAggregator(function(result, value, key) {
        result[key ? 0 : 1].push(value);
      }, function() { return [[], []]; });
  
      /**
       * Reduces `collection` to a value which is the accumulated result of running
       * each element in `collection` thru `iteratee`, where each successive
       * invocation is supplied the return value of the previous. If `accumulator`
       * is not given, the first element of `collection` is used as the initial
       * value. The iteratee is invoked with four arguments:
       * (accumulator, value, index|key, collection).
       *
       * Many lodash methods are guarded to work as iteratees for methods like
       * `_.reduce`, `_.reduceRight`, and `_.transform`.
       *
       * The guarded methods are:
       * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
       * and `sortBy`
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @param {*} [accumulator] The initial value.
       * @returns {*} Returns the accumulated value.
       * @see _.reduceRight
       * @example
       *
       * _.reduce([1, 2], function(sum, n) {
       *   return sum + n;
       * }, 0);
       * // => 3
       *
       * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
       *   (result[value] || (result[value] = [])).push(key);
       *   return result;
       * }, {});
       * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
       */
      function reduce(collection, iteratee, accumulator) {
        var func = isArray(collection) ? arrayReduce : baseReduce,
            initAccum = arguments.length < 3;
  
        return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
      }
  
      /**
       * This method is like `_.reduce` except that it iterates over elements of
       * `collection` from right to left.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @param {*} [accumulator] The initial value.
       * @returns {*} Returns the accumulated value.
       * @see _.reduce
       * @example
       *
       * var array = [[0, 1], [2, 3], [4, 5]];
       *
       * _.reduceRight(array, function(flattened, other) {
       *   return flattened.concat(other);
       * }, []);
       * // => [4, 5, 2, 3, 0, 1]
       */
      function reduceRight(collection, iteratee, accumulator) {
        var func = isArray(collection) ? arrayReduceRight : baseReduce,
            initAccum = arguments.length < 3;
  
        return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
      }
  
      /**
       * The opposite of `_.filter`; this method returns the elements of `collection`
       * that `predicate` does **not** return truthy for.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the new filtered array.
       * @see _.filter
       * @example
       *
       * var users = [
       *   { 'user': 'barney', 'age': 36, 'active': false },
       *   { 'user': 'fred',   'age': 40, 'active': true }
       * ];
       *
       * _.reject(users, function(o) { return !o.active; });
       * // => objects for ['fred']
       *
       * // The `_.matches` iteratee shorthand.
       * _.reject(users, { 'age': 40, 'active': true });
       * // => objects for ['barney']
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.reject(users, ['active', false]);
       * // => objects for ['fred']
       *
       * // The `_.property` iteratee shorthand.
       * _.reject(users, 'active');
       * // => objects for ['barney']
       */
      function reject(collection, predicate) {
        var func = isArray(collection) ? arrayFilter : baseFilter;
        return func(collection, negate(getIteratee(predicate, 3)));
      }
  
      /**
       * Gets a random element from `collection`.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Collection
       * @param {Array|Object} collection The collection to sample.
       * @returns {*} Returns the random element.
       * @example
       *
       * _.sample([1, 2, 3, 4]);
       * // => 2
       */
      function sample(collection) {
        var func = isArray(collection) ? arraySample : baseSample;
        return func(collection);
      }
  
      /**
       * Gets `n` random elements at unique keys from `collection` up to the
       * size of `collection`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Collection
       * @param {Array|Object} collection The collection to sample.
       * @param {number} [n=1] The number of elements to sample.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Array} Returns the random elements.
       * @example
       *
       * _.sampleSize([1, 2, 3], 2);
       * // => [3, 1]
       *
       * _.sampleSize([1, 2, 3], 4);
       * // => [2, 3, 1]
       */
      function sampleSize(collection, n, guard) {
        if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
          n = 1;
        } else {
          n = toInteger(n);
        }
        var func = isArray(collection) ? arraySampleSize : baseSampleSize;
        return func(collection, n);
      }
  
      /**
       * Creates an array of shuffled values, using a version of the
       * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to shuffle.
       * @returns {Array} Returns the new shuffled array.
       * @example
       *
       * _.shuffle([1, 2, 3, 4]);
       * // => [4, 1, 3, 2]
       */
      function shuffle(collection) {
        var func = isArray(collection) ? arrayShuffle : baseShuffle;
        return func(collection);
      }
  
      /**
       * Gets the size of `collection` by returning its length for array-like
       * values or the number of own enumerable string keyed properties for objects.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object|string} collection The collection to inspect.
       * @returns {number} Returns the collection size.
       * @example
       *
       * _.size([1, 2, 3]);
       * // => 3
       *
       * _.size({ 'a': 1, 'b': 2 });
       * // => 2
       *
       * _.size('pebbles');
       * // => 7
       */
      function size(collection) {
        if (collection == null) {
          return 0;
        }
        if (isArrayLike(collection)) {
          return isString(collection) ? stringSize(collection) : collection.length;
        }
        var tag = getTag(collection);
        if (tag == mapTag || tag == setTag) {
          return collection.size;
        }
        return baseKeys(collection).length;
      }
  
      /**
       * Checks if `predicate` returns truthy for **any** element of `collection`.
       * Iteration is stopped once `predicate` returns truthy. The predicate is
       * invoked with three arguments: (value, index|key, collection).
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {boolean} Returns `true` if any element passes the predicate check,
       *  else `false`.
       * @example
       *
       * _.some([null, 0, 'yes', false], Boolean);
       * // => true
       *
       * var users = [
       *   { 'user': 'barney', 'active': true },
       *   { 'user': 'fred',   'active': false }
       * ];
       *
       * // The `_.matches` iteratee shorthand.
       * _.some(users, { 'user': 'barney', 'active': false });
       * // => false
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.some(users, ['active', false]);
       * // => true
       *
       * // The `_.property` iteratee shorthand.
       * _.some(users, 'active');
       * // => true
       */
      function some(collection, predicate, guard) {
        var func = isArray(collection) ? arraySome : baseSome;
        if (guard && isIterateeCall(collection, predicate, guard)) {
          predicate = undefined;
        }
        return func(collection, getIteratee(predicate, 3));
      }
  
      /**
       * Creates an array of elements, sorted in ascending order by the results of
       * running each element in a collection thru each iteratee. This method
       * performs a stable sort, that is, it preserves the original sort order of
       * equal elements. The iteratees are invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Collection
       * @param {Array|Object} collection The collection to iterate over.
       * @param {...(Function|Function[])} [iteratees=[_.identity]]
       *  The iteratees to sort by.
       * @returns {Array} Returns the new sorted array.
       * @example
       *
       * var users = [
       *   { 'user': 'fred',   'age': 48 },
       *   { 'user': 'barney', 'age': 36 },
       *   { 'user': 'fred',   'age': 40 },
       *   { 'user': 'barney', 'age': 34 }
       * ];
       *
       * _.sortBy(users, [function(o) { return o.user; }]);
       * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
       *
       * _.sortBy(users, ['user', 'age']);
       * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
       */
      var sortBy = baseRest(function(collection, iteratees) {
        if (collection == null) {
          return [];
        }
        var length = iteratees.length;
        if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
          iteratees = [];
        } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
          iteratees = [iteratees[0]];
        }
        return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
      });
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Gets the timestamp of the number of milliseconds that have elapsed since
       * the Unix epoch (1 January 1970 00:00:00 UTC).
       *
       * @static
       * @memberOf _
       * @since 2.4.0
       * @category Date
       * @returns {number} Returns the timestamp.
       * @example
       *
       * _.defer(function(stamp) {
       *   console.log(_.now() - stamp);
       * }, _.now());
       * // => Logs the number of milliseconds it took for the deferred invocation.
       */
      var now = ctxNow || function() {
        return root.Date.now();
      };
  
      /*------------------------------------------------------------------------*/
  
      /**
       * The opposite of `_.before`; this method creates a function that invokes
       * `func` once it's called `n` or more times.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {number} n The number of calls before `func` is invoked.
       * @param {Function} func The function to restrict.
       * @returns {Function} Returns the new restricted function.
       * @example
       *
       * var saves = ['profile', 'settings'];
       *
       * var done = _.after(saves.length, function() {
       *   console.log('done saving!');
       * });
       *
       * _.forEach(saves, function(type) {
       *   asyncSave({ 'type': type, 'complete': done });
       * });
       * // => Logs 'done saving!' after the two async saves have completed.
       */
      function after(n, func) {
        if (typeof func != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        n = toInteger(n);
        return function() {
          if (--n < 1) {
            return func.apply(this, arguments);
          }
        };
      }
  
      /**
       * Creates a function that invokes `func`, with up to `n` arguments,
       * ignoring any additional arguments.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Function
       * @param {Function} func The function to cap arguments for.
       * @param {number} [n=func.length] The arity cap.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Function} Returns the new capped function.
       * @example
       *
       * _.map(['6', '8', '10'], _.ary(parseInt, 1));
       * // => [6, 8, 10]
       */
      function ary(func, n, guard) {
        n = guard ? undefined : n;
        n = (func && n == null) ? func.length : n;
        return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
      }
  
      /**
       * Creates a function that invokes `func`, with the `this` binding and arguments
       * of the created function, while it's called less than `n` times. Subsequent
       * calls to the created function return the result of the last `func` invocation.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Function
       * @param {number} n The number of calls at which `func` is no longer invoked.
       * @param {Function} func The function to restrict.
       * @returns {Function} Returns the new restricted function.
       * @example
       *
       * jQuery(element).on('click', _.before(5, addContactToList));
       * // => Allows adding up to 4 contacts to the list.
       */
      function before(n, func) {
        var result;
        if (typeof func != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        n = toInteger(n);
        return function() {
          if (--n > 0) {
            result = func.apply(this, arguments);
          }
          if (n <= 1) {
            func = undefined;
          }
          return result;
        };
      }
  
      /**
       * Creates a function that invokes `func` with the `this` binding of `thisArg`
       * and `partials` prepended to the arguments it receives.
       *
       * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
       * may be used as a placeholder for partially applied arguments.
       *
       * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
       * property of bound functions.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {Function} func The function to bind.
       * @param {*} thisArg The `this` binding of `func`.
       * @param {...*} [partials] The arguments to be partially applied.
       * @returns {Function} Returns the new bound function.
       * @example
       *
       * function greet(greeting, punctuation) {
       *   return greeting + ' ' + this.user + punctuation;
       * }
       *
       * var object = { 'user': 'fred' };
       *
       * var bound = _.bind(greet, object, 'hi');
       * bound('!');
       * // => 'hi fred!'
       *
       * // Bound with placeholders.
       * var bound = _.bind(greet, object, _, '!');
       * bound('hi');
       * // => 'hi fred!'
       */
      var bind = baseRest(function(func, thisArg, partials) {
        var bitmask = WRAP_BIND_FLAG;
        if (partials.length) {
          var holders = replaceHolders(partials, getHolder(bind));
          bitmask |= WRAP_PARTIAL_FLAG;
        }
        return createWrap(func, bitmask, thisArg, partials, holders);
      });
  
      /**
       * Creates a function that invokes the method at `object[key]` with `partials`
       * prepended to the arguments it receives.
       *
       * This method differs from `_.bind` by allowing bound functions to reference
       * methods that may be redefined or don't yet exist. See
       * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
       * for more details.
       *
       * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
       * builds, may be used as a placeholder for partially applied arguments.
       *
       * @static
       * @memberOf _
       * @since 0.10.0
       * @category Function
       * @param {Object} object The object to invoke the method on.
       * @param {string} key The key of the method.
       * @param {...*} [partials] The arguments to be partially applied.
       * @returns {Function} Returns the new bound function.
       * @example
       *
       * var object = {
       *   'user': 'fred',
       *   'greet': function(greeting, punctuation) {
       *     return greeting + ' ' + this.user + punctuation;
       *   }
       * };
       *
       * var bound = _.bindKey(object, 'greet', 'hi');
       * bound('!');
       * // => 'hi fred!'
       *
       * object.greet = function(greeting, punctuation) {
       *   return greeting + 'ya ' + this.user + punctuation;
       * };
       *
       * bound('!');
       * // => 'hiya fred!'
       *
       * // Bound with placeholders.
       * var bound = _.bindKey(object, 'greet', _, '!');
       * bound('hi');
       * // => 'hiya fred!'
       */
      var bindKey = baseRest(function(object, key, partials) {
        var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
        if (partials.length) {
          var holders = replaceHolders(partials, getHolder(bindKey));
          bitmask |= WRAP_PARTIAL_FLAG;
        }
        return createWrap(key, bitmask, object, partials, holders);
      });
  
      /**
       * Creates a function that accepts arguments of `func` and either invokes
       * `func` returning its result, if at least `arity` number of arguments have
       * been provided, or returns a function that accepts the remaining `func`
       * arguments, and so on. The arity of `func` may be specified if `func.length`
       * is not sufficient.
       *
       * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
       * may be used as a placeholder for provided arguments.
       *
       * **Note:** This method doesn't set the "length" property of curried functions.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Function
       * @param {Function} func The function to curry.
       * @param {number} [arity=func.length] The arity of `func`.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Function} Returns the new curried function.
       * @example
       *
       * var abc = function(a, b, c) {
       *   return [a, b, c];
       * };
       *
       * var curried = _.curry(abc);
       *
       * curried(1)(2)(3);
       * // => [1, 2, 3]
       *
       * curried(1, 2)(3);
       * // => [1, 2, 3]
       *
       * curried(1, 2, 3);
       * // => [1, 2, 3]
       *
       * // Curried with placeholders.
       * curried(1)(_, 3)(2);
       * // => [1, 2, 3]
       */
      function curry(func, arity, guard) {
        arity = guard ? undefined : arity;
        var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
        result.placeholder = curry.placeholder;
        return result;
      }
  
      /**
       * This method is like `_.curry` except that arguments are applied to `func`
       * in the manner of `_.partialRight` instead of `_.partial`.
       *
       * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
       * builds, may be used as a placeholder for provided arguments.
       *
       * **Note:** This method doesn't set the "length" property of curried functions.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Function
       * @param {Function} func The function to curry.
       * @param {number} [arity=func.length] The arity of `func`.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Function} Returns the new curried function.
       * @example
       *
       * var abc = function(a, b, c) {
       *   return [a, b, c];
       * };
       *
       * var curried = _.curryRight(abc);
       *
       * curried(3)(2)(1);
       * // => [1, 2, 3]
       *
       * curried(2, 3)(1);
       * // => [1, 2, 3]
       *
       * curried(1, 2, 3);
       * // => [1, 2, 3]
       *
       * // Curried with placeholders.
       * curried(3)(1, _)(2);
       * // => [1, 2, 3]
       */
      function curryRight(func, arity, guard) {
        arity = guard ? undefined : arity;
        var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
        result.placeholder = curryRight.placeholder;
        return result;
      }
  
      /**
       * Creates a debounced function that delays invoking `func` until after `wait`
       * milliseconds have elapsed since the last time the debounced function was
       * invoked. The debounced function comes with a `cancel` method to cancel
       * delayed `func` invocations and a `flush` method to immediately invoke them.
       * Provide `options` to indicate whether `func` should be invoked on the
       * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
       * with the last arguments provided to the debounced function. Subsequent
       * calls to the debounced function return the result of the last `func`
       * invocation.
       *
       * **Note:** If `leading` and `trailing` options are `true`, `func` is
       * invoked on the trailing edge of the timeout only if the debounced function
       * is invoked more than once during the `wait` timeout.
       *
       * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
       * until to the next tick, similar to `setTimeout` with a timeout of `0`.
       *
       * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
       * for details over the differences between `_.debounce` and `_.throttle`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {Function} func The function to debounce.
       * @param {number} [wait=0] The number of milliseconds to delay.
       * @param {Object} [options={}] The options object.
       * @param {boolean} [options.leading=false]
       *  Specify invoking on the leading edge of the timeout.
       * @param {number} [options.maxWait]
       *  The maximum time `func` is allowed to be delayed before it's invoked.
       * @param {boolean} [options.trailing=true]
       *  Specify invoking on the trailing edge of the timeout.
       * @returns {Function} Returns the new debounced function.
       * @example
       *
       * // Avoid costly calculations while the window size is in flux.
       * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
       *
       * // Invoke `sendMail` when clicked, debouncing subsequent calls.
       * jQuery(element).on('click', _.debounce(sendMail, 300, {
       *   'leading': true,
       *   'trailing': false
       * }));
       *
       * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
       * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
       * var source = new EventSource('/stream');
       * jQuery(source).on('message', debounced);
       *
       * // Cancel the trailing debounced invocation.
       * jQuery(window).on('popstate', debounced.cancel);
       */
      function debounce(func, wait, options) {
        var lastArgs,
            lastThis,
            maxWait,
            result,
            timerId,
            lastCallTime,
            lastInvokeTime = 0,
            leading = false,
            maxing = false,
            trailing = true;
  
        if (typeof func != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        wait = toNumber(wait) || 0;
        if (isObject(options)) {
          leading = !!options.leading;
          maxing = 'maxWait' in options;
          maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
          trailing = 'trailing' in options ? !!options.trailing : trailing;
        }
  
        function invokeFunc(time) {
          var args = lastArgs,
              thisArg = lastThis;
  
          lastArgs = lastThis = undefined;
          lastInvokeTime = time;
          result = func.apply(thisArg, args);
          return result;
        }
  
        function leadingEdge(time) {
          // Reset any `maxWait` timer.
          lastInvokeTime = time;
          // Start the timer for the trailing edge.
          timerId = setTimeout(timerExpired, wait);
          // Invoke the leading edge.
          return leading ? invokeFunc(time) : result;
        }
  
        function remainingWait(time) {
          var timeSinceLastCall = time - lastCallTime,
              timeSinceLastInvoke = time - lastInvokeTime,
              timeWaiting = wait - timeSinceLastCall;
  
          return maxing
            ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
            : timeWaiting;
        }
  
        function shouldInvoke(time) {
          var timeSinceLastCall = time - lastCallTime,
              timeSinceLastInvoke = time - lastInvokeTime;
  
          // Either this is the first call, activity has stopped and we're at the
          // trailing edge, the system time has gone backwards and we're treating
          // it as the trailing edge, or we've hit the `maxWait` limit.
          return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
            (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
        }
  
        function timerExpired() {
          var time = now();
          if (shouldInvoke(time)) {
            return trailingEdge(time);
          }
          // Restart the timer.
          timerId = setTimeout(timerExpired, remainingWait(time));
        }
  
        function trailingEdge(time) {
          timerId = undefined;
  
          // Only invoke if we have `lastArgs` which means `func` has been
          // debounced at least once.
          if (trailing && lastArgs) {
            return invokeFunc(time);
          }
          lastArgs = lastThis = undefined;
          return result;
        }
  
        function cancel() {
          if (timerId !== undefined) {
            clearTimeout(timerId);
          }
          lastInvokeTime = 0;
          lastArgs = lastCallTime = lastThis = timerId = undefined;
        }
  
        function flush() {
          return timerId === undefined ? result : trailingEdge(now());
        }
  
        function debounced() {
          var time = now(),
              isInvoking = shouldInvoke(time);
  
          lastArgs = arguments;
          lastThis = this;
          lastCallTime = time;
  
          if (isInvoking) {
            if (timerId === undefined) {
              return leadingEdge(lastCallTime);
            }
            if (maxing) {
              // Handle invocations in a tight loop.
              timerId = setTimeout(timerExpired, wait);
              return invokeFunc(lastCallTime);
            }
          }
          if (timerId === undefined) {
            timerId = setTimeout(timerExpired, wait);
          }
          return result;
        }
        debounced.cancel = cancel;
        debounced.flush = flush;
        return debounced;
      }
  
      /**
       * Defers invoking the `func` until the current call stack has cleared. Any
       * additional arguments are provided to `func` when it's invoked.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {Function} func The function to defer.
       * @param {...*} [args] The arguments to invoke `func` with.
       * @returns {number} Returns the timer id.
       * @example
       *
       * _.defer(function(text) {
       *   console.log(text);
       * }, 'deferred');
       * // => Logs 'deferred' after one millisecond.
       */
      var defer = baseRest(function(func, args) {
        return baseDelay(func, 1, args);
      });
  
      /**
       * Invokes `func` after `wait` milliseconds. Any additional arguments are
       * provided to `func` when it's invoked.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {Function} func The function to delay.
       * @param {number} wait The number of milliseconds to delay invocation.
       * @param {...*} [args] The arguments to invoke `func` with.
       * @returns {number} Returns the timer id.
       * @example
       *
       * _.delay(function(text) {
       *   console.log(text);
       * }, 1000, 'later');
       * // => Logs 'later' after one second.
       */
      var delay = baseRest(function(func, wait, args) {
        return baseDelay(func, toNumber(wait) || 0, args);
      });
  
      /**
       * Creates a function that invokes `func` with arguments reversed.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Function
       * @param {Function} func The function to flip arguments for.
       * @returns {Function} Returns the new flipped function.
       * @example
       *
       * var flipped = _.flip(function() {
       *   return _.toArray(arguments);
       * });
       *
       * flipped('a', 'b', 'c', 'd');
       * // => ['d', 'c', 'b', 'a']
       */
      function flip(func) {
        return createWrap(func, WRAP_FLIP_FLAG);
      }
  
      /**
       * Creates a function that memoizes the result of `func`. If `resolver` is
       * provided, it determines the cache key for storing the result based on the
       * arguments provided to the memoized function. By default, the first argument
       * provided to the memoized function is used as the map cache key. The `func`
       * is invoked with the `this` binding of the memoized function.
       *
       * **Note:** The cache is exposed as the `cache` property on the memoized
       * function. Its creation may be customized by replacing the `_.memoize.Cache`
       * constructor with one whose instances implement the
       * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
       * method interface of `clear`, `delete`, `get`, `has`, and `set`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {Function} func The function to have its output memoized.
       * @param {Function} [resolver] The function to resolve the cache key.
       * @returns {Function} Returns the new memoized function.
       * @example
       *
       * var object = { 'a': 1, 'b': 2 };
       * var other = { 'c': 3, 'd': 4 };
       *
       * var values = _.memoize(_.values);
       * values(object);
       * // => [1, 2]
       *
       * values(other);
       * // => [3, 4]
       *
       * object.a = 2;
       * values(object);
       * // => [1, 2]
       *
       * // Modify the result cache.
       * values.cache.set(object, ['a', 'b']);
       * values(object);
       * // => ['a', 'b']
       *
       * // Replace `_.memoize.Cache`.
       * _.memoize.Cache = WeakMap;
       */
      function memoize(func, resolver) {
        if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        var memoized = function() {
          var args = arguments,
              key = resolver ? resolver.apply(this, args) : args[0],
              cache = memoized.cache;
  
          if (cache.has(key)) {
            return cache.get(key);
          }
          var result = func.apply(this, args);
          memoized.cache = cache.set(key, result) || cache;
          return result;
        };
        memoized.cache = new (memoize.Cache || MapCache);
        return memoized;
      }
  
      // Expose `MapCache`.
      memoize.Cache = MapCache;
  
      /**
       * Creates a function that negates the result of the predicate `func`. The
       * `func` predicate is invoked with the `this` binding and arguments of the
       * created function.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Function
       * @param {Function} predicate The predicate to negate.
       * @returns {Function} Returns the new negated function.
       * @example
       *
       * function isEven(n) {
       *   return n % 2 == 0;
       * }
       *
       * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
       * // => [1, 3, 5]
       */
      function negate(predicate) {
        if (typeof predicate != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        return function() {
          var args = arguments;
          switch (args.length) {
            case 0: return !predicate.call(this);
            case 1: return !predicate.call(this, args[0]);
            case 2: return !predicate.call(this, args[0], args[1]);
            case 3: return !predicate.call(this, args[0], args[1], args[2]);
          }
          return !predicate.apply(this, args);
        };
      }
  
      /**
       * Creates a function that is restricted to invoking `func` once. Repeat calls
       * to the function return the value of the first invocation. The `func` is
       * invoked with the `this` binding and arguments of the created function.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {Function} func The function to restrict.
       * @returns {Function} Returns the new restricted function.
       * @example
       *
       * var initialize = _.once(createApplication);
       * initialize();
       * initialize();
       * // => `createApplication` is invoked once
       */
      function once(func) {
        return before(2, func);
      }
  
      /**
       * Creates a function that invokes `func` with its arguments transformed.
       *
       * @static
       * @since 4.0.0
       * @memberOf _
       * @category Function
       * @param {Function} func The function to wrap.
       * @param {...(Function|Function[])} [transforms=[_.identity]]
       *  The argument transforms.
       * @returns {Function} Returns the new function.
       * @example
       *
       * function doubled(n) {
       *   return n * 2;
       * }
       *
       * function square(n) {
       *   return n * n;
       * }
       *
       * var func = _.overArgs(function(x, y) {
       *   return [x, y];
       * }, [square, doubled]);
       *
       * func(9, 3);
       * // => [81, 6]
       *
       * func(10, 5);
       * // => [100, 10]
       */
      var overArgs = castRest(function(func, transforms) {
        transforms = (transforms.length == 1 && isArray(transforms[0]))
          ? arrayMap(transforms[0], baseUnary(getIteratee()))
          : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
  
        var funcsLength = transforms.length;
        return baseRest(function(args) {
          var index = -1,
              length = nativeMin(args.length, funcsLength);
  
          while (++index < length) {
            args[index] = transforms[index].call(this, args[index]);
          }
          return apply(func, this, args);
        });
      });
  
      /**
       * Creates a function that invokes `func` with `partials` prepended to the
       * arguments it receives. This method is like `_.bind` except it does **not**
       * alter the `this` binding.
       *
       * The `_.partial.placeholder` value, which defaults to `_` in monolithic
       * builds, may be used as a placeholder for partially applied arguments.
       *
       * **Note:** This method doesn't set the "length" property of partially
       * applied functions.
       *
       * @static
       * @memberOf _
       * @since 0.2.0
       * @category Function
       * @param {Function} func The function to partially apply arguments to.
       * @param {...*} [partials] The arguments to be partially applied.
       * @returns {Function} Returns the new partially applied function.
       * @example
       *
       * function greet(greeting, name) {
       *   return greeting + ' ' + name;
       * }
       *
       * var sayHelloTo = _.partial(greet, 'hello');
       * sayHelloTo('fred');
       * // => 'hello fred'
       *
       * // Partially applied with placeholders.
       * var greetFred = _.partial(greet, _, 'fred');
       * greetFred('hi');
       * // => 'hi fred'
       */
      var partial = baseRest(function(func, partials) {
        var holders = replaceHolders(partials, getHolder(partial));
        return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
      });
  
      /**
       * This method is like `_.partial` except that partially applied arguments
       * are appended to the arguments it receives.
       *
       * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
       * builds, may be used as a placeholder for partially applied arguments.
       *
       * **Note:** This method doesn't set the "length" property of partially
       * applied functions.
       *
       * @static
       * @memberOf _
       * @since 1.0.0
       * @category Function
       * @param {Function} func The function to partially apply arguments to.
       * @param {...*} [partials] The arguments to be partially applied.
       * @returns {Function} Returns the new partially applied function.
       * @example
       *
       * function greet(greeting, name) {
       *   return greeting + ' ' + name;
       * }
       *
       * var greetFred = _.partialRight(greet, 'fred');
       * greetFred('hi');
       * // => 'hi fred'
       *
       * // Partially applied with placeholders.
       * var sayHelloTo = _.partialRight(greet, 'hello', _);
       * sayHelloTo('fred');
       * // => 'hello fred'
       */
      var partialRight = baseRest(function(func, partials) {
        var holders = replaceHolders(partials, getHolder(partialRight));
        return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
      });
  
      /**
       * Creates a function that invokes `func` with arguments arranged according
       * to the specified `indexes` where the argument value at the first index is
       * provided as the first argument, the argument value at the second index is
       * provided as the second argument, and so on.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Function
       * @param {Function} func The function to rearrange arguments for.
       * @param {...(number|number[])} indexes The arranged argument indexes.
       * @returns {Function} Returns the new function.
       * @example
       *
       * var rearged = _.rearg(function(a, b, c) {
       *   return [a, b, c];
       * }, [2, 0, 1]);
       *
       * rearged('b', 'c', 'a')
       * // => ['a', 'b', 'c']
       */
      var rearg = flatRest(function(func, indexes) {
        return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
      });
  
      /**
       * Creates a function that invokes `func` with the `this` binding of the
       * created function and arguments from `start` and beyond provided as
       * an array.
       *
       * **Note:** This method is based on the
       * [rest parameter](https://mdn.io/rest_parameters).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Function
       * @param {Function} func The function to apply a rest parameter to.
       * @param {number} [start=func.length-1] The start position of the rest parameter.
       * @returns {Function} Returns the new function.
       * @example
       *
       * var say = _.rest(function(what, names) {
       *   return what + ' ' + _.initial(names).join(', ') +
       *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
       * });
       *
       * say('hello', 'fred', 'barney', 'pebbles');
       * // => 'hello fred, barney, & pebbles'
       */
      function rest(func, start) {
        if (typeof func != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        start = start === undefined ? start : toInteger(start);
        return baseRest(func, start);
      }
  
      /**
       * Creates a function that invokes `func` with the `this` binding of the
       * create function and an array of arguments much like
       * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
       *
       * **Note:** This method is based on the
       * [spread operator](https://mdn.io/spread_operator).
       *
       * @static
       * @memberOf _
       * @since 3.2.0
       * @category Function
       * @param {Function} func The function to spread arguments over.
       * @param {number} [start=0] The start position of the spread.
       * @returns {Function} Returns the new function.
       * @example
       *
       * var say = _.spread(function(who, what) {
       *   return who + ' says ' + what;
       * });
       *
       * say(['fred', 'hello']);
       * // => 'fred says hello'
       *
       * var numbers = Promise.all([
       *   Promise.resolve(40),
       *   Promise.resolve(36)
       * ]);
       *
       * numbers.then(_.spread(function(x, y) {
       *   return x + y;
       * }));
       * // => a Promise of 76
       */
      function spread(func, start) {
        if (typeof func != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        start = start == null ? 0 : nativeMax(toInteger(start), 0);
        return baseRest(function(args) {
          var array = args[start],
              otherArgs = castSlice(args, 0, start);
  
          if (array) {
            arrayPush(otherArgs, array);
          }
          return apply(func, this, otherArgs);
        });
      }
  
      /**
       * Creates a throttled function that only invokes `func` at most once per
       * every `wait` milliseconds. The throttled function comes with a `cancel`
       * method to cancel delayed `func` invocations and a `flush` method to
       * immediately invoke them. Provide `options` to indicate whether `func`
       * should be invoked on the leading and/or trailing edge of the `wait`
       * timeout. The `func` is invoked with the last arguments provided to the
       * throttled function. Subsequent calls to the throttled function return the
       * result of the last `func` invocation.
       *
       * **Note:** If `leading` and `trailing` options are `true`, `func` is
       * invoked on the trailing edge of the timeout only if the throttled function
       * is invoked more than once during the `wait` timeout.
       *
       * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
       * until to the next tick, similar to `setTimeout` with a timeout of `0`.
       *
       * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
       * for details over the differences between `_.throttle` and `_.debounce`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {Function} func The function to throttle.
       * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
       * @param {Object} [options={}] The options object.
       * @param {boolean} [options.leading=true]
       *  Specify invoking on the leading edge of the timeout.
       * @param {boolean} [options.trailing=true]
       *  Specify invoking on the trailing edge of the timeout.
       * @returns {Function} Returns the new throttled function.
       * @example
       *
       * // Avoid excessively updating the position while scrolling.
       * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
       *
       * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
       * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
       * jQuery(element).on('click', throttled);
       *
       * // Cancel the trailing throttled invocation.
       * jQuery(window).on('popstate', throttled.cancel);
       */
      function throttle(func, wait, options) {
        var leading = true,
            trailing = true;
  
        if (typeof func != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        if (isObject(options)) {
          leading = 'leading' in options ? !!options.leading : leading;
          trailing = 'trailing' in options ? !!options.trailing : trailing;
        }
        return debounce(func, wait, {
          'leading': leading,
          'maxWait': wait,
          'trailing': trailing
        });
      }
  
      /**
       * Creates a function that accepts up to one argument, ignoring any
       * additional arguments.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Function
       * @param {Function} func The function to cap arguments for.
       * @returns {Function} Returns the new capped function.
       * @example
       *
       * _.map(['6', '8', '10'], _.unary(parseInt));
       * // => [6, 8, 10]
       */
      function unary(func) {
        return ary(func, 1);
      }
  
      /**
       * Creates a function that provides `value` to `wrapper` as its first
       * argument. Any additional arguments provided to the function are appended
       * to those provided to the `wrapper`. The wrapper is invoked with the `this`
       * binding of the created function.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Function
       * @param {*} value The value to wrap.
       * @param {Function} [wrapper=identity] The wrapper function.
       * @returns {Function} Returns the new function.
       * @example
       *
       * var p = _.wrap(_.escape, function(func, text) {
       *   return '<p>' + func(text) + '</p>';
       * });
       *
       * p('fred, barney, & pebbles');
       * // => '<p>fred, barney, &amp; pebbles</p>'
       */
      function wrap(value, wrapper) {
        return partial(castFunction(wrapper), value);
      }
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Casts `value` as an array if it's not one.
       *
       * @static
       * @memberOf _
       * @since 4.4.0
       * @category Lang
       * @param {*} value The value to inspect.
       * @returns {Array} Returns the cast array.
       * @example
       *
       * _.castArray(1);
       * // => [1]
       *
       * _.castArray({ 'a': 1 });
       * // => [{ 'a': 1 }]
       *
       * _.castArray('abc');
       * // => ['abc']
       *
       * _.castArray(null);
       * // => [null]
       *
       * _.castArray(undefined);
       * // => [undefined]
       *
       * _.castArray();
       * // => []
       *
       * var array = [1, 2, 3];
       * console.log(_.castArray(array) === array);
       * // => true
       */
      function castArray() {
        if (!arguments.length) {
          return [];
        }
        var value = arguments[0];
        return isArray(value) ? value : [value];
      }
  
      /**
       * Creates a shallow clone of `value`.
       *
       * **Note:** This method is loosely based on the
       * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
       * and supports cloning arrays, array buffers, booleans, date objects, maps,
       * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
       * arrays. The own enumerable properties of `arguments` objects are cloned
       * as plain objects. An empty object is returned for uncloneable values such
       * as error objects, functions, DOM nodes, and WeakMaps.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to clone.
       * @returns {*} Returns the cloned value.
       * @see _.cloneDeep
       * @example
       *
       * var objects = [{ 'a': 1 }, { 'b': 2 }];
       *
       * var shallow = _.clone(objects);
       * console.log(shallow[0] === objects[0]);
       * // => true
       */
      function clone(value) {
        return baseClone(value, CLONE_SYMBOLS_FLAG);
      }
  
      /**
       * This method is like `_.clone` except that it accepts `customizer` which
       * is invoked to produce the cloned value. If `customizer` returns `undefined`,
       * cloning is handled by the method instead. The `customizer` is invoked with
       * up to four arguments; (value [, index|key, object, stack]).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to clone.
       * @param {Function} [customizer] The function to customize cloning.
       * @returns {*} Returns the cloned value.
       * @see _.cloneDeepWith
       * @example
       *
       * function customizer(value) {
       *   if (_.isElement(value)) {
       *     return value.cloneNode(false);
       *   }
       * }
       *
       * var el = _.cloneWith(document.body, customizer);
       *
       * console.log(el === document.body);
       * // => false
       * console.log(el.nodeName);
       * // => 'BODY'
       * console.log(el.childNodes.length);
       * // => 0
       */
      function cloneWith(value, customizer) {
        customizer = typeof customizer == 'function' ? customizer : undefined;
        return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
      }
  
      /**
       * This method is like `_.clone` except that it recursively clones `value`.
       *
       * @static
       * @memberOf _
       * @since 1.0.0
       * @category Lang
       * @param {*} value The value to recursively clone.
       * @returns {*} Returns the deep cloned value.
       * @see _.clone
       * @example
       *
       * var objects = [{ 'a': 1 }, { 'b': 2 }];
       *
       * var deep = _.cloneDeep(objects);
       * console.log(deep[0] === objects[0]);
       * // => false
       */
      function cloneDeep(value) {
        return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
      }
  
      /**
       * This method is like `_.cloneWith` except that it recursively clones `value`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to recursively clone.
       * @param {Function} [customizer] The function to customize cloning.
       * @returns {*} Returns the deep cloned value.
       * @see _.cloneWith
       * @example
       *
       * function customizer(value) {
       *   if (_.isElement(value)) {
       *     return value.cloneNode(true);
       *   }
       * }
       *
       * var el = _.cloneDeepWith(document.body, customizer);
       *
       * console.log(el === document.body);
       * // => false
       * console.log(el.nodeName);
       * // => 'BODY'
       * console.log(el.childNodes.length);
       * // => 20
       */
      function cloneDeepWith(value, customizer) {
        customizer = typeof customizer == 'function' ? customizer : undefined;
        return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
      }
  
      /**
       * Checks if `object` conforms to `source` by invoking the predicate
       * properties of `source` with the corresponding property values of `object`.
       *
       * **Note:** This method is equivalent to `_.conforms` when `source` is
       * partially applied.
       *
       * @static
       * @memberOf _
       * @since 4.14.0
       * @category Lang
       * @param {Object} object The object to inspect.
       * @param {Object} source The object of property predicates to conform to.
       * @returns {boolean} Returns `true` if `object` conforms, else `false`.
       * @example
       *
       * var object = { 'a': 1, 'b': 2 };
       *
       * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
       * // => true
       *
       * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
       * // => false
       */
      function conformsTo(object, source) {
        return source == null || baseConformsTo(object, source, keys(source));
      }
  
      /**
       * Performs a
       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
       * comparison between two values to determine if they are equivalent.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
       * @example
       *
       * var object = { 'a': 1 };
       * var other = { 'a': 1 };
       *
       * _.eq(object, object);
       * // => true
       *
       * _.eq(object, other);
       * // => false
       *
       * _.eq('a', 'a');
       * // => true
       *
       * _.eq('a', Object('a'));
       * // => false
       *
       * _.eq(NaN, NaN);
       * // => true
       */
      function eq(value, other) {
        return value === other || (value !== value && other !== other);
      }
  
      /**
       * Checks if `value` is greater than `other`.
       *
       * @static
       * @memberOf _
       * @since 3.9.0
       * @category Lang
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {boolean} Returns `true` if `value` is greater than `other`,
       *  else `false`.
       * @see _.lt
       * @example
       *
       * _.gt(3, 1);
       * // => true
       *
       * _.gt(3, 3);
       * // => false
       *
       * _.gt(1, 3);
       * // => false
       */
      var gt = createRelationalOperation(baseGt);
  
      /**
       * Checks if `value` is greater than or equal to `other`.
       *
       * @static
       * @memberOf _
       * @since 3.9.0
       * @category Lang
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {boolean} Returns `true` if `value` is greater than or equal to
       *  `other`, else `false`.
       * @see _.lte
       * @example
       *
       * _.gte(3, 1);
       * // => true
       *
       * _.gte(3, 3);
       * // => true
       *
       * _.gte(1, 3);
       * // => false
       */
      var gte = createRelationalOperation(function(value, other) {
        return value >= other;
      });
  
      /**
       * Checks if `value` is likely an `arguments` object.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an `arguments` object,
       *  else `false`.
       * @example
       *
       * _.isArguments(function() { return arguments; }());
       * // => true
       *
       * _.isArguments([1, 2, 3]);
       * // => false
       */
      var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
        return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
          !propertyIsEnumerable.call(value, 'callee');
      };
  
      /**
       * Checks if `value` is classified as an `Array` object.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an array, else `false`.
       * @example
       *
       * _.isArray([1, 2, 3]);
       * // => true
       *
       * _.isArray(document.body.children);
       * // => false
       *
       * _.isArray('abc');
       * // => false
       *
       * _.isArray(_.noop);
       * // => false
       */
      var isArray = Array.isArray;
  
      /**
       * Checks if `value` is classified as an `ArrayBuffer` object.
       *
       * @static
       * @memberOf _
       * @since 4.3.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
       * @example
       *
       * _.isArrayBuffer(new ArrayBuffer(2));
       * // => true
       *
       * _.isArrayBuffer(new Array(2));
       * // => false
       */
      var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
  
      /**
       * Checks if `value` is array-like. A value is considered array-like if it's
       * not a function and has a `value.length` that's an integer greater than or
       * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
       * @example
       *
       * _.isArrayLike([1, 2, 3]);
       * // => true
       *
       * _.isArrayLike(document.body.children);
       * // => true
       *
       * _.isArrayLike('abc');
       * // => true
       *
       * _.isArrayLike(_.noop);
       * // => false
       */
      function isArrayLike(value) {
        return value != null && isLength(value.length) && !isFunction(value);
      }
  
      /**
       * This method is like `_.isArrayLike` except that it also checks if `value`
       * is an object.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an array-like object,
       *  else `false`.
       * @example
       *
       * _.isArrayLikeObject([1, 2, 3]);
       * // => true
       *
       * _.isArrayLikeObject(document.body.children);
       * // => true
       *
       * _.isArrayLikeObject('abc');
       * // => false
       *
       * _.isArrayLikeObject(_.noop);
       * // => false
       */
      function isArrayLikeObject(value) {
        return isObjectLike(value) && isArrayLike(value);
      }
  
      /**
       * Checks if `value` is classified as a boolean primitive or object.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
       * @example
       *
       * _.isBoolean(false);
       * // => true
       *
       * _.isBoolean(null);
       * // => false
       */
      function isBoolean(value) {
        return value === true || value === false ||
          (isObjectLike(value) && baseGetTag(value) == boolTag);
      }
  
      /**
       * Checks if `value` is a buffer.
       *
       * @static
       * @memberOf _
       * @since 4.3.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
       * @example
       *
       * _.isBuffer(new Buffer(2));
       * // => true
       *
       * _.isBuffer(new Uint8Array(2));
       * // => false
       */
      var isBuffer = nativeIsBuffer || stubFalse;
  
      /**
       * Checks if `value` is classified as a `Date` object.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
       * @example
       *
       * _.isDate(new Date);
       * // => true
       *
       * _.isDate('Mon April 23 2012');
       * // => false
       */
      var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
  
      /**
       * Checks if `value` is likely a DOM element.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
       * @example
       *
       * _.isElement(document.body);
       * // => true
       *
       * _.isElement('<body>');
       * // => false
       */
      function isElement(value) {
        return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
      }
  
      /**
       * Checks if `value` is an empty object, collection, map, or set.
       *
       * Objects are considered empty if they have no own enumerable string keyed
       * properties.
       *
       * Array-like values such as `arguments` objects, arrays, buffers, strings, or
       * jQuery-like collections are considered empty if they have a `length` of `0`.
       * Similarly, maps and sets are considered empty if they have a `size` of `0`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is empty, else `false`.
       * @example
       *
       * _.isEmpty(null);
       * // => true
       *
       * _.isEmpty(true);
       * // => true
       *
       * _.isEmpty(1);
       * // => true
       *
       * _.isEmpty([1, 2, 3]);
       * // => false
       *
       * _.isEmpty({ 'a': 1 });
       * // => false
       */
      function isEmpty(value) {
        if (value == null) {
          return true;
        }
        if (isArrayLike(value) &&
            (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
              isBuffer(value) || isTypedArray(value) || isArguments(value))) {
          return !value.length;
        }
        var tag = getTag(value);
        if (tag == mapTag || tag == setTag) {
          return !value.size;
        }
        if (isPrototype(value)) {
          return !baseKeys(value).length;
        }
        for (var key in value) {
          if (hasOwnProperty.call(value, key)) {
            return false;
          }
        }
        return true;
      }
  
      /**
       * Performs a deep comparison between two values to determine if they are
       * equivalent.
       *
       * **Note:** This method supports comparing arrays, array buffers, booleans,
       * date objects, error objects, maps, numbers, `Object` objects, regexes,
       * sets, strings, symbols, and typed arrays. `Object` objects are compared
       * by their own, not inherited, enumerable properties. Functions and DOM
       * nodes are compared by strict equality, i.e. `===`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
       * @example
       *
       * var object = { 'a': 1 };
       * var other = { 'a': 1 };
       *
       * _.isEqual(object, other);
       * // => true
       *
       * object === other;
       * // => false
       */
      function isEqual(value, other) {
        return baseIsEqual(value, other);
      }
  
      /**
       * This method is like `_.isEqual` except that it accepts `customizer` which
       * is invoked to compare values. If `customizer` returns `undefined`, comparisons
       * are handled by the method instead. The `customizer` is invoked with up to
       * six arguments: (objValue, othValue [, index|key, object, other, stack]).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @param {Function} [customizer] The function to customize comparisons.
       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
       * @example
       *
       * function isGreeting(value) {
       *   return /^h(?:i|ello)$/.test(value);
       * }
       *
       * function customizer(objValue, othValue) {
       *   if (isGreeting(objValue) && isGreeting(othValue)) {
       *     return true;
       *   }
       * }
       *
       * var array = ['hello', 'goodbye'];
       * var other = ['hi', 'goodbye'];
       *
       * _.isEqualWith(array, other, customizer);
       * // => true
       */
      function isEqualWith(value, other, customizer) {
        customizer = typeof customizer == 'function' ? customizer : undefined;
        var result = customizer ? customizer(value, other) : undefined;
        return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
      }
  
      /**
       * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
       * `SyntaxError`, `TypeError`, or `URIError` object.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
       * @example
       *
       * _.isError(new Error);
       * // => true
       *
       * _.isError(Error);
       * // => false
       */
      function isError(value) {
        if (!isObjectLike(value)) {
          return false;
        }
        var tag = baseGetTag(value);
        return tag == errorTag || tag == domExcTag ||
          (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
      }
  
      /**
       * Checks if `value` is a finite primitive number.
       *
       * **Note:** This method is based on
       * [`Number.isFinite`](https://mdn.io/Number/isFinite).
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
       * @example
       *
       * _.isFinite(3);
       * // => true
       *
       * _.isFinite(Number.MIN_VALUE);
       * // => true
       *
       * _.isFinite(Infinity);
       * // => false
       *
       * _.isFinite('3');
       * // => false
       */
      function isFinite(value) {
        return typeof value == 'number' && nativeIsFinite(value);
      }
  
      /**
       * Checks if `value` is classified as a `Function` object.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a function, else `false`.
       * @example
       *
       * _.isFunction(_);
       * // => true
       *
       * _.isFunction(/abc/);
       * // => false
       */
      function isFunction(value) {
        if (!isObject(value)) {
          return false;
        }
        // The use of `Object#toString` avoids issues with the `typeof` operator
        // in Safari 9 which returns 'object' for typed arrays and other constructors.
        var tag = baseGetTag(value);
        return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
      }
  
      /**
       * Checks if `value` is an integer.
       *
       * **Note:** This method is based on
       * [`Number.isInteger`](https://mdn.io/Number/isInteger).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
       * @example
       *
       * _.isInteger(3);
       * // => true
       *
       * _.isInteger(Number.MIN_VALUE);
       * // => false
       *
       * _.isInteger(Infinity);
       * // => false
       *
       * _.isInteger('3');
       * // => false
       */
      function isInteger(value) {
        return typeof value == 'number' && value == toInteger(value);
      }
  
      /**
       * Checks if `value` is a valid array-like length.
       *
       * **Note:** This method is loosely based on
       * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
       * @example
       *
       * _.isLength(3);
       * // => true
       *
       * _.isLength(Number.MIN_VALUE);
       * // => false
       *
       * _.isLength(Infinity);
       * // => false
       *
       * _.isLength('3');
       * // => false
       */
      function isLength(value) {
        return typeof value == 'number' &&
          value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
      }
  
      /**
       * Checks if `value` is the
       * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
       * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is an object, else `false`.
       * @example
       *
       * _.isObject({});
       * // => true
       *
       * _.isObject([1, 2, 3]);
       * // => true
       *
       * _.isObject(_.noop);
       * // => true
       *
       * _.isObject(null);
       * // => false
       */
      function isObject(value) {
        var type = typeof value;
        return value != null && (type == 'object' || type == 'function');
      }
  
      /**
       * Checks if `value` is object-like. A value is object-like if it's not `null`
       * and has a `typeof` result of "object".
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
       * @example
       *
       * _.isObjectLike({});
       * // => true
       *
       * _.isObjectLike([1, 2, 3]);
       * // => true
       *
       * _.isObjectLike(_.noop);
       * // => false
       *
       * _.isObjectLike(null);
       * // => false
       */
      function isObjectLike(value) {
        return value != null && typeof value == 'object';
      }
  
      /**
       * Checks if `value` is classified as a `Map` object.
       *
       * @static
       * @memberOf _
       * @since 4.3.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a map, else `false`.
       * @example
       *
       * _.isMap(new Map);
       * // => true
       *
       * _.isMap(new WeakMap);
       * // => false
       */
      var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
  
      /**
       * Performs a partial deep comparison between `object` and `source` to
       * determine if `object` contains equivalent property values.
       *
       * **Note:** This method is equivalent to `_.matches` when `source` is
       * partially applied.
       *
       * Partial comparisons will match empty array and empty object `source`
       * values against any array or object value, respectively. See `_.isEqual`
       * for a list of supported value comparisons.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Lang
       * @param {Object} object The object to inspect.
       * @param {Object} source The object of property values to match.
       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
       * @example
       *
       * var object = { 'a': 1, 'b': 2 };
       *
       * _.isMatch(object, { 'b': 2 });
       * // => true
       *
       * _.isMatch(object, { 'b': 1 });
       * // => false
       */
      function isMatch(object, source) {
        return object === source || baseIsMatch(object, source, getMatchData(source));
      }
  
      /**
       * This method is like `_.isMatch` except that it accepts `customizer` which
       * is invoked to compare values. If `customizer` returns `undefined`, comparisons
       * are handled by the method instead. The `customizer` is invoked with five
       * arguments: (objValue, srcValue, index|key, object, source).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {Object} object The object to inspect.
       * @param {Object} source The object of property values to match.
       * @param {Function} [customizer] The function to customize comparisons.
       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
       * @example
       *
       * function isGreeting(value) {
       *   return /^h(?:i|ello)$/.test(value);
       * }
       *
       * function customizer(objValue, srcValue) {
       *   if (isGreeting(objValue) && isGreeting(srcValue)) {
       *     return true;
       *   }
       * }
       *
       * var object = { 'greeting': 'hello' };
       * var source = { 'greeting': 'hi' };
       *
       * _.isMatchWith(object, source, customizer);
       * // => true
       */
      function isMatchWith(object, source, customizer) {
        customizer = typeof customizer == 'function' ? customizer : undefined;
        return baseIsMatch(object, source, getMatchData(source), customizer);
      }
  
      /**
       * Checks if `value` is `NaN`.
       *
       * **Note:** This method is based on
       * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
       * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
       * `undefined` and other non-number values.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
       * @example
       *
       * _.isNaN(NaN);
       * // => true
       *
       * _.isNaN(new Number(NaN));
       * // => true
       *
       * isNaN(undefined);
       * // => true
       *
       * _.isNaN(undefined);
       * // => false
       */
      function isNaN(value) {
        // An `NaN` primitive is the only value that is not equal to itself.
        // Perform the `toStringTag` check first to avoid errors with some
        // ActiveX objects in IE.
        return isNumber(value) && value != +value;
      }
  
      /**
       * Checks if `value` is a pristine native function.
       *
       * **Note:** This method can't reliably detect native functions in the presence
       * of the core-js package because core-js circumvents this kind of detection.
       * Despite multiple requests, the core-js maintainer has made it clear: any
       * attempt to fix the detection will be obstructed. As a result, we're left
       * with little choice but to throw an error. Unfortunately, this also affects
       * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
       * which rely on core-js.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a native function,
       *  else `false`.
       * @example
       *
       * _.isNative(Array.prototype.push);
       * // => true
       *
       * _.isNative(_);
       * // => false
       */
      function isNative(value) {
        if (isMaskable(value)) {
          throw new Error(CORE_ERROR_TEXT);
        }
        return baseIsNative(value);
      }
  
      /**
       * Checks if `value` is `null`.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
       * @example
       *
       * _.isNull(null);
       * // => true
       *
       * _.isNull(void 0);
       * // => false
       */
      function isNull(value) {
        return value === null;
      }
  
      /**
       * Checks if `value` is `null` or `undefined`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
       * @example
       *
       * _.isNil(null);
       * // => true
       *
       * _.isNil(void 0);
       * // => true
       *
       * _.isNil(NaN);
       * // => false
       */
      function isNil(value) {
        return value == null;
      }
  
      /**
       * Checks if `value` is classified as a `Number` primitive or object.
       *
       * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
       * classified as numbers, use the `_.isFinite` method.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a number, else `false`.
       * @example
       *
       * _.isNumber(3);
       * // => true
       *
       * _.isNumber(Number.MIN_VALUE);
       * // => true
       *
       * _.isNumber(Infinity);
       * // => true
       *
       * _.isNumber('3');
       * // => false
       */
      function isNumber(value) {
        return typeof value == 'number' ||
          (isObjectLike(value) && baseGetTag(value) == numberTag);
      }
  
      /**
       * Checks if `value` is a plain object, that is, an object created by the
       * `Object` constructor or one with a `[[Prototype]]` of `null`.
       *
       * @static
       * @memberOf _
       * @since 0.8.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       * }
       *
       * _.isPlainObject(new Foo);
       * // => false
       *
       * _.isPlainObject([1, 2, 3]);
       * // => false
       *
       * _.isPlainObject({ 'x': 0, 'y': 0 });
       * // => true
       *
       * _.isPlainObject(Object.create(null));
       * // => true
       */
      function isPlainObject(value) {
        if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
          return false;
        }
        var proto = getPrototype(value);
        if (proto === null) {
          return true;
        }
        var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
        return typeof Ctor == 'function' && Ctor instanceof Ctor &&
          funcToString.call(Ctor) == objectCtorString;
      }
  
      /**
       * Checks if `value` is classified as a `RegExp` object.
       *
       * @static
       * @memberOf _
       * @since 0.1.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
       * @example
       *
       * _.isRegExp(/abc/);
       * // => true
       *
       * _.isRegExp('/abc/');
       * // => false
       */
      var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
  
      /**
       * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
       * double precision number which isn't the result of a rounded unsafe integer.
       *
       * **Note:** This method is based on
       * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
       * @example
       *
       * _.isSafeInteger(3);
       * // => true
       *
       * _.isSafeInteger(Number.MIN_VALUE);
       * // => false
       *
       * _.isSafeInteger(Infinity);
       * // => false
       *
       * _.isSafeInteger('3');
       * // => false
       */
      function isSafeInteger(value) {
        return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
      }
  
      /**
       * Checks if `value` is classified as a `Set` object.
       *
       * @static
       * @memberOf _
       * @since 4.3.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a set, else `false`.
       * @example
       *
       * _.isSet(new Set);
       * // => true
       *
       * _.isSet(new WeakSet);
       * // => false
       */
      var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
  
      /**
       * Checks if `value` is classified as a `String` primitive or object.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a string, else `false`.
       * @example
       *
       * _.isString('abc');
       * // => true
       *
       * _.isString(1);
       * // => false
       */
      function isString(value) {
        return typeof value == 'string' ||
          (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
      }
  
      /**
       * Checks if `value` is classified as a `Symbol` primitive or object.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
       * @example
       *
       * _.isSymbol(Symbol.iterator);
       * // => true
       *
       * _.isSymbol('abc');
       * // => false
       */
      function isSymbol(value) {
        return typeof value == 'symbol' ||
          (isObjectLike(value) && baseGetTag(value) == symbolTag);
      }
  
      /**
       * Checks if `value` is classified as a typed array.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
       * @example
       *
       * _.isTypedArray(new Uint8Array);
       * // => true
       *
       * _.isTypedArray([]);
       * // => false
       */
      var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
  
      /**
       * Checks if `value` is `undefined`.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
       * @example
       *
       * _.isUndefined(void 0);
       * // => true
       *
       * _.isUndefined(null);
       * // => false
       */
      function isUndefined(value) {
        return value === undefined;
      }
  
      /**
       * Checks if `value` is classified as a `WeakMap` object.
       *
       * @static
       * @memberOf _
       * @since 4.3.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
       * @example
       *
       * _.isWeakMap(new WeakMap);
       * // => true
       *
       * _.isWeakMap(new Map);
       * // => false
       */
      function isWeakMap(value) {
        return isObjectLike(value) && getTag(value) == weakMapTag;
      }
  
      /**
       * Checks if `value` is classified as a `WeakSet` object.
       *
       * @static
       * @memberOf _
       * @since 4.3.0
       * @category Lang
       * @param {*} value The value to check.
       * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
       * @example
       *
       * _.isWeakSet(new WeakSet);
       * // => true
       *
       * _.isWeakSet(new Set);
       * // => false
       */
      function isWeakSet(value) {
        return isObjectLike(value) && baseGetTag(value) == weakSetTag;
      }
  
      /**
       * Checks if `value` is less than `other`.
       *
       * @static
       * @memberOf _
       * @since 3.9.0
       * @category Lang
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {boolean} Returns `true` if `value` is less than `other`,
       *  else `false`.
       * @see _.gt
       * @example
       *
       * _.lt(1, 3);
       * // => true
       *
       * _.lt(3, 3);
       * // => false
       *
       * _.lt(3, 1);
       * // => false
       */
      var lt = createRelationalOperation(baseLt);
  
      /**
       * Checks if `value` is less than or equal to `other`.
       *
       * @static
       * @memberOf _
       * @since 3.9.0
       * @category Lang
       * @param {*} value The value to compare.
       * @param {*} other The other value to compare.
       * @returns {boolean} Returns `true` if `value` is less than or equal to
       *  `other`, else `false`.
       * @see _.gte
       * @example
       *
       * _.lte(1, 3);
       * // => true
       *
       * _.lte(3, 3);
       * // => true
       *
       * _.lte(3, 1);
       * // => false
       */
      var lte = createRelationalOperation(function(value, other) {
        return value <= other;
      });
  
      /**
       * Converts `value` to an array.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Lang
       * @param {*} value The value to convert.
       * @returns {Array} Returns the converted array.
       * @example
       *
       * _.toArray({ 'a': 1, 'b': 2 });
       * // => [1, 2]
       *
       * _.toArray('abc');
       * // => ['a', 'b', 'c']
       *
       * _.toArray(1);
       * // => []
       *
       * _.toArray(null);
       * // => []
       */
      function toArray(value) {
        if (!value) {
          return [];
        }
        if (isArrayLike(value)) {
          return isString(value) ? stringToArray(value) : copyArray(value);
        }
        if (symIterator && value[symIterator]) {
          return iteratorToArray(value[symIterator]());
        }
        var tag = getTag(value),
            func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
  
        return func(value);
      }
  
      /**
       * Converts `value` to a finite number.
       *
       * @static
       * @memberOf _
       * @since 4.12.0
       * @category Lang
       * @param {*} value The value to convert.
       * @returns {number} Returns the converted number.
       * @example
       *
       * _.toFinite(3.2);
       * // => 3.2
       *
       * _.toFinite(Number.MIN_VALUE);
       * // => 5e-324
       *
       * _.toFinite(Infinity);
       * // => 1.7976931348623157e+308
       *
       * _.toFinite('3.2');
       * // => 3.2
       */
      function toFinite(value) {
        if (!value) {
          return value === 0 ? value : 0;
        }
        value = toNumber(value);
        if (value === INFINITY || value === -INFINITY) {
          var sign = (value < 0 ? -1 : 1);
          return sign * MAX_INTEGER;
        }
        return value === value ? value : 0;
      }
  
      /**
       * Converts `value` to an integer.
       *
       * **Note:** This method is loosely based on
       * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to convert.
       * @returns {number} Returns the converted integer.
       * @example
       *
       * _.toInteger(3.2);
       * // => 3
       *
       * _.toInteger(Number.MIN_VALUE);
       * // => 0
       *
       * _.toInteger(Infinity);
       * // => 1.7976931348623157e+308
       *
       * _.toInteger('3.2');
       * // => 3
       */
      function toInteger(value) {
        var result = toFinite(value),
            remainder = result % 1;
  
        return result === result ? (remainder ? result - remainder : result) : 0;
      }
  
      /**
       * Converts `value` to an integer suitable for use as the length of an
       * array-like object.
       *
       * **Note:** This method is based on
       * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to convert.
       * @returns {number} Returns the converted integer.
       * @example
       *
       * _.toLength(3.2);
       * // => 3
       *
       * _.toLength(Number.MIN_VALUE);
       * // => 0
       *
       * _.toLength(Infinity);
       * // => 4294967295
       *
       * _.toLength('3.2');
       * // => 3
       */
      function toLength(value) {
        return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
      }
  
      /**
       * Converts `value` to a number.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to process.
       * @returns {number} Returns the number.
       * @example
       *
       * _.toNumber(3.2);
       * // => 3.2
       *
       * _.toNumber(Number.MIN_VALUE);
       * // => 5e-324
       *
       * _.toNumber(Infinity);
       * // => Infinity
       *
       * _.toNumber('3.2');
       * // => 3.2
       */
      function toNumber(value) {
        if (typeof value == 'number') {
          return value;
        }
        if (isSymbol(value)) {
          return NAN;
        }
        if (isObject(value)) {
          var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
          value = isObject(other) ? (other + '') : other;
        }
        if (typeof value != 'string') {
          return value === 0 ? value : +value;
        }
        value = value.replace(reTrim, '');
        var isBinary = reIsBinary.test(value);
        return (isBinary || reIsOctal.test(value))
          ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
          : (reIsBadHex.test(value) ? NAN : +value);
      }
  
      /**
       * Converts `value` to a plain object flattening inherited enumerable string
       * keyed properties of `value` to own properties of the plain object.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Lang
       * @param {*} value The value to convert.
       * @returns {Object} Returns the converted plain object.
       * @example
       *
       * function Foo() {
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.assign({ 'a': 1 }, new Foo);
       * // => { 'a': 1, 'b': 2 }
       *
       * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
       * // => { 'a': 1, 'b': 2, 'c': 3 }
       */
      function toPlainObject(value) {
        return copyObject(value, keysIn(value));
      }
  
      /**
       * Converts `value` to a safe integer. A safe integer can be compared and
       * represented correctly.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to convert.
       * @returns {number} Returns the converted integer.
       * @example
       *
       * _.toSafeInteger(3.2);
       * // => 3
       *
       * _.toSafeInteger(Number.MIN_VALUE);
       * // => 0
       *
       * _.toSafeInteger(Infinity);
       * // => 9007199254740991
       *
       * _.toSafeInteger('3.2');
       * // => 3
       */
      function toSafeInteger(value) {
        return value
          ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
          : (value === 0 ? value : 0);
      }
  
      /**
       * Converts `value` to a string. An empty string is returned for `null`
       * and `undefined` values. The sign of `-0` is preserved.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Lang
       * @param {*} value The value to convert.
       * @returns {string} Returns the converted string.
       * @example
       *
       * _.toString(null);
       * // => ''
       *
       * _.toString(-0);
       * // => '-0'
       *
       * _.toString([1, 2, 3]);
       * // => '1,2,3'
       */
      function toString(value) {
        return value == null ? '' : baseToString(value);
      }
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Assigns own enumerable string keyed properties of source objects to the
       * destination object. Source objects are applied from left to right.
       * Subsequent sources overwrite property assignments of previous sources.
       *
       * **Note:** This method mutates `object` and is loosely based on
       * [`Object.assign`](https://mdn.io/Object/assign).
       *
       * @static
       * @memberOf _
       * @since 0.10.0
       * @category Object
       * @param {Object} object The destination object.
       * @param {...Object} [sources] The source objects.
       * @returns {Object} Returns `object`.
       * @see _.assignIn
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       * }
       *
       * function Bar() {
       *   this.c = 3;
       * }
       *
       * Foo.prototype.b = 2;
       * Bar.prototype.d = 4;
       *
       * _.assign({ 'a': 0 }, new Foo, new Bar);
       * // => { 'a': 1, 'c': 3 }
       */
      var assign = createAssigner(function(object, source) {
        if (isPrototype(source) || isArrayLike(source)) {
          copyObject(source, keys(source), object);
          return;
        }
        for (var key in source) {
          if (hasOwnProperty.call(source, key)) {
            assignValue(object, key, source[key]);
          }
        }
      });
  
      /**
       * This method is like `_.assign` except that it iterates over own and
       * inherited source properties.
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @alias extend
       * @category Object
       * @param {Object} object The destination object.
       * @param {...Object} [sources] The source objects.
       * @returns {Object} Returns `object`.
       * @see _.assign
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       * }
       *
       * function Bar() {
       *   this.c = 3;
       * }
       *
       * Foo.prototype.b = 2;
       * Bar.prototype.d = 4;
       *
       * _.assignIn({ 'a': 0 }, new Foo, new Bar);
       * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
       */
      var assignIn = createAssigner(function(object, source) {
        copyObject(source, keysIn(source), object);
      });
  
      /**
       * This method is like `_.assignIn` except that it accepts `customizer`
       * which is invoked to produce the assigned values. If `customizer` returns
       * `undefined`, assignment is handled by the method instead. The `customizer`
       * is invoked with five arguments: (objValue, srcValue, key, object, source).
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @alias extendWith
       * @category Object
       * @param {Object} object The destination object.
       * @param {...Object} sources The source objects.
       * @param {Function} [customizer] The function to customize assigned values.
       * @returns {Object} Returns `object`.
       * @see _.assignWith
       * @example
       *
       * function customizer(objValue, srcValue) {
       *   return _.isUndefined(objValue) ? srcValue : objValue;
       * }
       *
       * var defaults = _.partialRight(_.assignInWith, customizer);
       *
       * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
       * // => { 'a': 1, 'b': 2 }
       */
      var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
        copyObject(source, keysIn(source), object, customizer);
      });
  
      /**
       * This method is like `_.assign` except that it accepts `customizer`
       * which is invoked to produce the assigned values. If `customizer` returns
       * `undefined`, assignment is handled by the method instead. The `customizer`
       * is invoked with five arguments: (objValue, srcValue, key, object, source).
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The destination object.
       * @param {...Object} sources The source objects.
       * @param {Function} [customizer] The function to customize assigned values.
       * @returns {Object} Returns `object`.
       * @see _.assignInWith
       * @example
       *
       * function customizer(objValue, srcValue) {
       *   return _.isUndefined(objValue) ? srcValue : objValue;
       * }
       *
       * var defaults = _.partialRight(_.assignWith, customizer);
       *
       * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
       * // => { 'a': 1, 'b': 2 }
       */
      var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
        copyObject(source, keys(source), object, customizer);
      });
  
      /**
       * Creates an array of values corresponding to `paths` of `object`.
       *
       * @static
       * @memberOf _
       * @since 1.0.0
       * @category Object
       * @param {Object} object The object to iterate over.
       * @param {...(string|string[])} [paths] The property paths to pick.
       * @returns {Array} Returns the picked values.
       * @example
       *
       * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
       *
       * _.at(object, ['a[0].b.c', 'a[1]']);
       * // => [3, 4]
       */
      var at = flatRest(baseAt);
  
      /**
       * Creates an object that inherits from the `prototype` object. If a
       * `properties` object is given, its own enumerable string keyed properties
       * are assigned to the created object.
       *
       * @static
       * @memberOf _
       * @since 2.3.0
       * @category Object
       * @param {Object} prototype The object to inherit from.
       * @param {Object} [properties] The properties to assign to the object.
       * @returns {Object} Returns the new object.
       * @example
       *
       * function Shape() {
       *   this.x = 0;
       *   this.y = 0;
       * }
       *
       * function Circle() {
       *   Shape.call(this);
       * }
       *
       * Circle.prototype = _.create(Shape.prototype, {
       *   'constructor': Circle
       * });
       *
       * var circle = new Circle;
       * circle instanceof Circle;
       * // => true
       *
       * circle instanceof Shape;
       * // => true
       */
      function create(prototype, properties) {
        var result = baseCreate(prototype);
        return properties == null ? result : baseAssign(result, properties);
      }
  
      /**
       * Assigns own and inherited enumerable string keyed properties of source
       * objects to the destination object for all destination properties that
       * resolve to `undefined`. Source objects are applied from left to right.
       * Once a property is set, additional values of the same property are ignored.
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Object
       * @param {Object} object The destination object.
       * @param {...Object} [sources] The source objects.
       * @returns {Object} Returns `object`.
       * @see _.defaultsDeep
       * @example
       *
       * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
       * // => { 'a': 1, 'b': 2 }
       */
      var defaults = baseRest(function(object, sources) {
        object = Object(object);
  
        var index = -1;
        var length = sources.length;
        var guard = length > 2 ? sources[2] : undefined;
  
        if (guard && isIterateeCall(sources[0], sources[1], guard)) {
          length = 1;
        }
  
        while (++index < length) {
          var source = sources[index];
          var props = keysIn(source);
          var propsIndex = -1;
          var propsLength = props.length;
  
          while (++propsIndex < propsLength) {
            var key = props[propsIndex];
            var value = object[key];
  
            if (value === undefined ||
                (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {
              object[key] = source[key];
            }
          }
        }
  
        return object;
      });
  
      /**
       * This method is like `_.defaults` except that it recursively assigns
       * default properties.
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 3.10.0
       * @category Object
       * @param {Object} object The destination object.
       * @param {...Object} [sources] The source objects.
       * @returns {Object} Returns `object`.
       * @see _.defaults
       * @example
       *
       * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
       * // => { 'a': { 'b': 2, 'c': 3 } }
       */
      var defaultsDeep = baseRest(function(args) {
        args.push(undefined, customDefaultsMerge);
        return apply(mergeWith, undefined, args);
      });
  
      /**
       * This method is like `_.find` except that it returns the key of the first
       * element `predicate` returns truthy for instead of the element itself.
       *
       * @static
       * @memberOf _
       * @since 1.1.0
       * @category Object
       * @param {Object} object The object to inspect.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {string|undefined} Returns the key of the matched element,
       *  else `undefined`.
       * @example
       *
       * var users = {
       *   'barney':  { 'age': 36, 'active': true },
       *   'fred':    { 'age': 40, 'active': false },
       *   'pebbles': { 'age': 1,  'active': true }
       * };
       *
       * _.findKey(users, function(o) { return o.age < 40; });
       * // => 'barney' (iteration order is not guaranteed)
       *
       * // The `_.matches` iteratee shorthand.
       * _.findKey(users, { 'age': 1, 'active': true });
       * // => 'pebbles'
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.findKey(users, ['active', false]);
       * // => 'fred'
       *
       * // The `_.property` iteratee shorthand.
       * _.findKey(users, 'active');
       * // => 'barney'
       */
      function findKey(object, predicate) {
        return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
      }
  
      /**
       * This method is like `_.findKey` except that it iterates over elements of
       * a collection in the opposite order.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Object
       * @param {Object} object The object to inspect.
       * @param {Function} [predicate=_.identity] The function invoked per iteration.
       * @returns {string|undefined} Returns the key of the matched element,
       *  else `undefined`.
       * @example
       *
       * var users = {
       *   'barney':  { 'age': 36, 'active': true },
       *   'fred':    { 'age': 40, 'active': false },
       *   'pebbles': { 'age': 1,  'active': true }
       * };
       *
       * _.findLastKey(users, function(o) { return o.age < 40; });
       * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
       *
       * // The `_.matches` iteratee shorthand.
       * _.findLastKey(users, { 'age': 36, 'active': true });
       * // => 'barney'
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.findLastKey(users, ['active', false]);
       * // => 'fred'
       *
       * // The `_.property` iteratee shorthand.
       * _.findLastKey(users, 'active');
       * // => 'pebbles'
       */
      function findLastKey(object, predicate) {
        return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
      }
  
      /**
       * Iterates over own and inherited enumerable string keyed properties of an
       * object and invokes `iteratee` for each property. The iteratee is invoked
       * with three arguments: (value, key, object). Iteratee functions may exit
       * iteration early by explicitly returning `false`.
       *
       * @static
       * @memberOf _
       * @since 0.3.0
       * @category Object
       * @param {Object} object The object to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Object} Returns `object`.
       * @see _.forInRight
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.forIn(new Foo, function(value, key) {
       *   console.log(key);
       * });
       * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
       */
      function forIn(object, iteratee) {
        return object == null
          ? object
          : baseFor(object, getIteratee(iteratee, 3), keysIn);
      }
  
      /**
       * This method is like `_.forIn` except that it iterates over properties of
       * `object` in the opposite order.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Object
       * @param {Object} object The object to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Object} Returns `object`.
       * @see _.forIn
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.forInRight(new Foo, function(value, key) {
       *   console.log(key);
       * });
       * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
       */
      function forInRight(object, iteratee) {
        return object == null
          ? object
          : baseForRight(object, getIteratee(iteratee, 3), keysIn);
      }
  
      /**
       * Iterates over own enumerable string keyed properties of an object and
       * invokes `iteratee` for each property. The iteratee is invoked with three
       * arguments: (value, key, object). Iteratee functions may exit iteration
       * early by explicitly returning `false`.
       *
       * @static
       * @memberOf _
       * @since 0.3.0
       * @category Object
       * @param {Object} object The object to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Object} Returns `object`.
       * @see _.forOwnRight
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.forOwn(new Foo, function(value, key) {
       *   console.log(key);
       * });
       * // => Logs 'a' then 'b' (iteration order is not guaranteed).
       */
      function forOwn(object, iteratee) {
        return object && baseForOwn(object, getIteratee(iteratee, 3));
      }
  
      /**
       * This method is like `_.forOwn` except that it iterates over properties of
       * `object` in the opposite order.
       *
       * @static
       * @memberOf _
       * @since 2.0.0
       * @category Object
       * @param {Object} object The object to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Object} Returns `object`.
       * @see _.forOwn
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.forOwnRight(new Foo, function(value, key) {
       *   console.log(key);
       * });
       * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
       */
      function forOwnRight(object, iteratee) {
        return object && baseForOwnRight(object, getIteratee(iteratee, 3));
      }
  
      /**
       * Creates an array of function property names from own enumerable properties
       * of `object`.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Object
       * @param {Object} object The object to inspect.
       * @returns {Array} Returns the function names.
       * @see _.functionsIn
       * @example
       *
       * function Foo() {
       *   this.a = _.constant('a');
       *   this.b = _.constant('b');
       * }
       *
       * Foo.prototype.c = _.constant('c');
       *
       * _.functions(new Foo);
       * // => ['a', 'b']
       */
      function functions(object) {
        return object == null ? [] : baseFunctions(object, keys(object));
      }
  
      /**
       * Creates an array of function property names from own and inherited
       * enumerable properties of `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The object to inspect.
       * @returns {Array} Returns the function names.
       * @see _.functions
       * @example
       *
       * function Foo() {
       *   this.a = _.constant('a');
       *   this.b = _.constant('b');
       * }
       *
       * Foo.prototype.c = _.constant('c');
       *
       * _.functionsIn(new Foo);
       * // => ['a', 'b', 'c']
       */
      function functionsIn(object) {
        return object == null ? [] : baseFunctions(object, keysIn(object));
      }
  
      /**
       * Gets the value at `path` of `object`. If the resolved value is
       * `undefined`, the `defaultValue` is returned in its place.
       *
       * @static
       * @memberOf _
       * @since 3.7.0
       * @category Object
       * @param {Object} object The object to query.
       * @param {Array|string} path The path of the property to get.
       * @param {*} [defaultValue] The value returned for `undefined` resolved values.
       * @returns {*} Returns the resolved value.
       * @example
       *
       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
       *
       * _.get(object, 'a[0].b.c');
       * // => 3
       *
       * _.get(object, ['a', '0', 'b', 'c']);
       * // => 3
       *
       * _.get(object, 'a.b.c', 'default');
       * // => 'default'
       */
      function get(object, path, defaultValue) {
        var result = object == null ? undefined : baseGet(object, path);
        return result === undefined ? defaultValue : result;
      }
  
      /**
       * Checks if `path` is a direct property of `object`.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Object
       * @param {Object} object The object to query.
       * @param {Array|string} path The path to check.
       * @returns {boolean} Returns `true` if `path` exists, else `false`.
       * @example
       *
       * var object = { 'a': { 'b': 2 } };
       * var other = _.create({ 'a': _.create({ 'b': 2 }) });
       *
       * _.has(object, 'a');
       * // => true
       *
       * _.has(object, 'a.b');
       * // => true
       *
       * _.has(object, ['a', 'b']);
       * // => true
       *
       * _.has(other, 'a');
       * // => false
       */
      function has(object, path) {
        return object != null && hasPath(object, path, baseHas);
      }
  
      /**
       * Checks if `path` is a direct or inherited property of `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The object to query.
       * @param {Array|string} path The path to check.
       * @returns {boolean} Returns `true` if `path` exists, else `false`.
       * @example
       *
       * var object = _.create({ 'a': _.create({ 'b': 2 }) });
       *
       * _.hasIn(object, 'a');
       * // => true
       *
       * _.hasIn(object, 'a.b');
       * // => true
       *
       * _.hasIn(object, ['a', 'b']);
       * // => true
       *
       * _.hasIn(object, 'b');
       * // => false
       */
      function hasIn(object, path) {
        return object != null && hasPath(object, path, baseHasIn);
      }
  
      /**
       * Creates an object composed of the inverted keys and values of `object`.
       * If `object` contains duplicate values, subsequent values overwrite
       * property assignments of previous values.
       *
       * @static
       * @memberOf _
       * @since 0.7.0
       * @category Object
       * @param {Object} object The object to invert.
       * @returns {Object} Returns the new inverted object.
       * @example
       *
       * var object = { 'a': 1, 'b': 2, 'c': 1 };
       *
       * _.invert(object);
       * // => { '1': 'c', '2': 'b' }
       */
      var invert = createInverter(function(result, value, key) {
        if (value != null &&
            typeof value.toString != 'function') {
          value = nativeObjectToString.call(value);
        }
  
        result[value] = key;
      }, constant(identity));
  
      /**
       * This method is like `_.invert` except that the inverted object is generated
       * from the results of running each element of `object` thru `iteratee`. The
       * corresponding inverted value of each inverted key is an array of keys
       * responsible for generating the inverted value. The iteratee is invoked
       * with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.1.0
       * @category Object
       * @param {Object} object The object to invert.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {Object} Returns the new inverted object.
       * @example
       *
       * var object = { 'a': 1, 'b': 2, 'c': 1 };
       *
       * _.invertBy(object);
       * // => { '1': ['a', 'c'], '2': ['b'] }
       *
       * _.invertBy(object, function(value) {
       *   return 'group' + value;
       * });
       * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
       */
      var invertBy = createInverter(function(result, value, key) {
        if (value != null &&
            typeof value.toString != 'function') {
          value = nativeObjectToString.call(value);
        }
  
        if (hasOwnProperty.call(result, value)) {
          result[value].push(key);
        } else {
          result[value] = [key];
        }
      }, getIteratee);
  
      /**
       * Invokes the method at `path` of `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The object to query.
       * @param {Array|string} path The path of the method to invoke.
       * @param {...*} [args] The arguments to invoke the method with.
       * @returns {*} Returns the result of the invoked method.
       * @example
       *
       * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
       *
       * _.invoke(object, 'a[0].b.c.slice', 1, 3);
       * // => [2, 3]
       */
      var invoke = baseRest(baseInvoke);
  
      /**
       * Creates an array of the own enumerable property names of `object`.
       *
       * **Note:** Non-object values are coerced to objects. See the
       * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
       * for more details.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Object
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property names.
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.keys(new Foo);
       * // => ['a', 'b'] (iteration order is not guaranteed)
       *
       * _.keys('hi');
       * // => ['0', '1']
       */
      function keys(object) {
        return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
      }
  
      /**
       * Creates an array of the own and inherited enumerable property names of `object`.
       *
       * **Note:** Non-object values are coerced to objects.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Object
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property names.
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.keysIn(new Foo);
       * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
       */
      function keysIn(object) {
        return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
      }
  
      /**
       * The opposite of `_.mapValues`; this method creates an object with the
       * same values as `object` and keys generated by running each own enumerable
       * string keyed property of `object` thru `iteratee`. The iteratee is invoked
       * with three arguments: (value, key, object).
       *
       * @static
       * @memberOf _
       * @since 3.8.0
       * @category Object
       * @param {Object} object The object to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Object} Returns the new mapped object.
       * @see _.mapValues
       * @example
       *
       * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
       *   return key + value;
       * });
       * // => { 'a1': 1, 'b2': 2 }
       */
      function mapKeys(object, iteratee) {
        var result = {};
        iteratee = getIteratee(iteratee, 3);
  
        baseForOwn(object, function(value, key, object) {
          baseAssignValue(result, iteratee(value, key, object), value);
        });
        return result;
      }
  
      /**
       * Creates an object with the same keys as `object` and values generated
       * by running each own enumerable string keyed property of `object` thru
       * `iteratee`. The iteratee is invoked with three arguments:
       * (value, key, object).
       *
       * @static
       * @memberOf _
       * @since 2.4.0
       * @category Object
       * @param {Object} object The object to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Object} Returns the new mapped object.
       * @see _.mapKeys
       * @example
       *
       * var users = {
       *   'fred':    { 'user': 'fred',    'age': 40 },
       *   'pebbles': { 'user': 'pebbles', 'age': 1 }
       * };
       *
       * _.mapValues(users, function(o) { return o.age; });
       * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
       *
       * // The `_.property` iteratee shorthand.
       * _.mapValues(users, 'age');
       * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
       */
      function mapValues(object, iteratee) {
        var result = {};
        iteratee = getIteratee(iteratee, 3);
  
        baseForOwn(object, function(value, key, object) {
          baseAssignValue(result, key, iteratee(value, key, object));
        });
        return result;
      }
  
      /**
       * This method is like `_.assign` except that it recursively merges own and
       * inherited enumerable string keyed properties of source objects into the
       * destination object. Source properties that resolve to `undefined` are
       * skipped if a destination value exists. Array and plain object properties
       * are merged recursively. Other objects and value types are overridden by
       * assignment. Source objects are applied from left to right. Subsequent
       * sources overwrite property assignments of previous sources.
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 0.5.0
       * @category Object
       * @param {Object} object The destination object.
       * @param {...Object} [sources] The source objects.
       * @returns {Object} Returns `object`.
       * @example
       *
       * var object = {
       *   'a': [{ 'b': 2 }, { 'd': 4 }]
       * };
       *
       * var other = {
       *   'a': [{ 'c': 3 }, { 'e': 5 }]
       * };
       *
       * _.merge(object, other);
       * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
       */
      var merge = createAssigner(function(object, source, srcIndex) {
        baseMerge(object, source, srcIndex);
      });
  
      /**
       * This method is like `_.merge` except that it accepts `customizer` which
       * is invoked to produce the merged values of the destination and source
       * properties. If `customizer` returns `undefined`, merging is handled by the
       * method instead. The `customizer` is invoked with six arguments:
       * (objValue, srcValue, key, object, source, stack).
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The destination object.
       * @param {...Object} sources The source objects.
       * @param {Function} customizer The function to customize assigned values.
       * @returns {Object} Returns `object`.
       * @example
       *
       * function customizer(objValue, srcValue) {
       *   if (_.isArray(objValue)) {
       *     return objValue.concat(srcValue);
       *   }
       * }
       *
       * var object = { 'a': [1], 'b': [2] };
       * var other = { 'a': [3], 'b': [4] };
       *
       * _.mergeWith(object, other, customizer);
       * // => { 'a': [1, 3], 'b': [2, 4] }
       */
      var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
        baseMerge(object, source, srcIndex, customizer);
      });
  
      /**
       * The opposite of `_.pick`; this method creates an object composed of the
       * own and inherited enumerable property paths of `object` that are not omitted.
       *
       * **Note:** This method is considerably slower than `_.pick`.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Object
       * @param {Object} object The source object.
       * @param {...(string|string[])} [paths] The property paths to omit.
       * @returns {Object} Returns the new object.
       * @example
       *
       * var object = { 'a': 1, 'b': '2', 'c': 3 };
       *
       * _.omit(object, ['a', 'c']);
       * // => { 'b': '2' }
       */
      var omit = flatRest(function(object, paths) {
        var result = {};
        if (object == null) {
          return result;
        }
        var isDeep = false;
        paths = arrayMap(paths, function(path) {
          path = castPath(path, object);
          isDeep || (isDeep = path.length > 1);
          return path;
        });
        copyObject(object, getAllKeysIn(object), result);
        if (isDeep) {
          result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
        }
        var length = paths.length;
        while (length--) {
          baseUnset(result, paths[length]);
        }
        return result;
      });
  
      /**
       * The opposite of `_.pickBy`; this method creates an object composed of
       * the own and inherited enumerable string keyed properties of `object` that
       * `predicate` doesn't return truthy for. The predicate is invoked with two
       * arguments: (value, key).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The source object.
       * @param {Function} [predicate=_.identity] The function invoked per property.
       * @returns {Object} Returns the new object.
       * @example
       *
       * var object = { 'a': 1, 'b': '2', 'c': 3 };
       *
       * _.omitBy(object, _.isNumber);
       * // => { 'b': '2' }
       */
      function omitBy(object, predicate) {
        return pickBy(object, negate(getIteratee(predicate)));
      }
  
      /**
       * Creates an object composed of the picked `object` properties.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Object
       * @param {Object} object The source object.
       * @param {...(string|string[])} [paths] The property paths to pick.
       * @returns {Object} Returns the new object.
       * @example
       *
       * var object = { 'a': 1, 'b': '2', 'c': 3 };
       *
       * _.pick(object, ['a', 'c']);
       * // => { 'a': 1, 'c': 3 }
       */
      var pick = flatRest(function(object, paths) {
        return object == null ? {} : basePick(object, paths);
      });
  
      /**
       * Creates an object composed of the `object` properties `predicate` returns
       * truthy for. The predicate is invoked with two arguments: (value, key).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The source object.
       * @param {Function} [predicate=_.identity] The function invoked per property.
       * @returns {Object} Returns the new object.
       * @example
       *
       * var object = { 'a': 1, 'b': '2', 'c': 3 };
       *
       * _.pickBy(object, _.isNumber);
       * // => { 'a': 1, 'c': 3 }
       */
      function pickBy(object, predicate) {
        if (object == null) {
          return {};
        }
        var props = arrayMap(getAllKeysIn(object), function(prop) {
          return [prop];
        });
        predicate = getIteratee(predicate);
        return basePickBy(object, props, function(value, path) {
          return predicate(value, path[0]);
        });
      }
  
      /**
       * This method is like `_.get` except that if the resolved value is a
       * function it's invoked with the `this` binding of its parent object and
       * its result is returned.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Object
       * @param {Object} object The object to query.
       * @param {Array|string} path The path of the property to resolve.
       * @param {*} [defaultValue] The value returned for `undefined` resolved values.
       * @returns {*} Returns the resolved value.
       * @example
       *
       * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
       *
       * _.result(object, 'a[0].b.c1');
       * // => 3
       *
       * _.result(object, 'a[0].b.c2');
       * // => 4
       *
       * _.result(object, 'a[0].b.c3', 'default');
       * // => 'default'
       *
       * _.result(object, 'a[0].b.c3', _.constant('default'));
       * // => 'default'
       */
      function result(object, path, defaultValue) {
        path = castPath(path, object);
  
        var index = -1,
            length = path.length;
  
        // Ensure the loop is entered when path is empty.
        if (!length) {
          length = 1;
          object = undefined;
        }
        while (++index < length) {
          var value = object == null ? undefined : object[toKey(path[index])];
          if (value === undefined) {
            index = length;
            value = defaultValue;
          }
          object = isFunction(value) ? value.call(object) : value;
        }
        return object;
      }
  
      /**
       * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
       * it's created. Arrays are created for missing index properties while objects
       * are created for all other missing properties. Use `_.setWith` to customize
       * `path` creation.
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 3.7.0
       * @category Object
       * @param {Object} object The object to modify.
       * @param {Array|string} path The path of the property to set.
       * @param {*} value The value to set.
       * @returns {Object} Returns `object`.
       * @example
       *
       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
       *
       * _.set(object, 'a[0].b.c', 4);
       * console.log(object.a[0].b.c);
       * // => 4
       *
       * _.set(object, ['x', '0', 'y', 'z'], 5);
       * console.log(object.x[0].y.z);
       * // => 5
       */
      function set(object, path, value) {
        return object == null ? object : baseSet(object, path, value);
      }
  
      /**
       * This method is like `_.set` except that it accepts `customizer` which is
       * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
       * path creation is handled by the method instead. The `customizer` is invoked
       * with three arguments: (nsValue, key, nsObject).
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The object to modify.
       * @param {Array|string} path The path of the property to set.
       * @param {*} value The value to set.
       * @param {Function} [customizer] The function to customize assigned values.
       * @returns {Object} Returns `object`.
       * @example
       *
       * var object = {};
       *
       * _.setWith(object, '[0][1]', 'a', Object);
       * // => { '0': { '1': 'a' } }
       */
      function setWith(object, path, value, customizer) {
        customizer = typeof customizer == 'function' ? customizer : undefined;
        return object == null ? object : baseSet(object, path, value, customizer);
      }
  
      /**
       * Creates an array of own enumerable string keyed-value pairs for `object`
       * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
       * entries are returned.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @alias entries
       * @category Object
       * @param {Object} object The object to query.
       * @returns {Array} Returns the key-value pairs.
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.toPairs(new Foo);
       * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
       */
      var toPairs = createToPairs(keys);
  
      /**
       * Creates an array of own and inherited enumerable string keyed-value pairs
       * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
       * or set, its entries are returned.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @alias entriesIn
       * @category Object
       * @param {Object} object The object to query.
       * @returns {Array} Returns the key-value pairs.
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.toPairsIn(new Foo);
       * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
       */
      var toPairsIn = createToPairs(keysIn);
  
      /**
       * An alternative to `_.reduce`; this method transforms `object` to a new
       * `accumulator` object which is the result of running each of its own
       * enumerable string keyed properties thru `iteratee`, with each invocation
       * potentially mutating the `accumulator` object. If `accumulator` is not
       * provided, a new object with the same `[[Prototype]]` will be used. The
       * iteratee is invoked with four arguments: (accumulator, value, key, object).
       * Iteratee functions may exit iteration early by explicitly returning `false`.
       *
       * @static
       * @memberOf _
       * @since 1.3.0
       * @category Object
       * @param {Object} object The object to iterate over.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @param {*} [accumulator] The custom accumulator value.
       * @returns {*} Returns the accumulated value.
       * @example
       *
       * _.transform([2, 3, 4], function(result, n) {
       *   result.push(n *= n);
       *   return n % 2 == 0;
       * }, []);
       * // => [4, 9]
       *
       * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
       *   (result[value] || (result[value] = [])).push(key);
       * }, {});
       * // => { '1': ['a', 'c'], '2': ['b'] }
       */
      function transform(object, iteratee, accumulator) {
        var isArr = isArray(object),
            isArrLike = isArr || isBuffer(object) || isTypedArray(object);
  
        iteratee = getIteratee(iteratee, 4);
        if (accumulator == null) {
          var Ctor = object && object.constructor;
          if (isArrLike) {
            accumulator = isArr ? new Ctor : [];
          }
          else if (isObject(object)) {
            accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
          }
          else {
            accumulator = {};
          }
        }
        (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
          return iteratee(accumulator, value, index, object);
        });
        return accumulator;
      }
  
      /**
       * Removes the property at `path` of `object`.
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Object
       * @param {Object} object The object to modify.
       * @param {Array|string} path The path of the property to unset.
       * @returns {boolean} Returns `true` if the property is deleted, else `false`.
       * @example
       *
       * var object = { 'a': [{ 'b': { 'c': 7 } }] };
       * _.unset(object, 'a[0].b.c');
       * // => true
       *
       * console.log(object);
       * // => { 'a': [{ 'b': {} }] };
       *
       * _.unset(object, ['a', '0', 'b', 'c']);
       * // => true
       *
       * console.log(object);
       * // => { 'a': [{ 'b': {} }] };
       */
      function unset(object, path) {
        return object == null ? true : baseUnset(object, path);
      }
  
      /**
       * This method is like `_.set` except that accepts `updater` to produce the
       * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
       * is invoked with one argument: (value).
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 4.6.0
       * @category Object
       * @param {Object} object The object to modify.
       * @param {Array|string} path The path of the property to set.
       * @param {Function} updater The function to produce the updated value.
       * @returns {Object} Returns `object`.
       * @example
       *
       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
       *
       * _.update(object, 'a[0].b.c', function(n) { return n * n; });
       * console.log(object.a[0].b.c);
       * // => 9
       *
       * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
       * console.log(object.x[0].y.z);
       * // => 0
       */
      function update(object, path, updater) {
        return object == null ? object : baseUpdate(object, path, castFunction(updater));
      }
  
      /**
       * This method is like `_.update` except that it accepts `customizer` which is
       * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
       * path creation is handled by the method instead. The `customizer` is invoked
       * with three arguments: (nsValue, key, nsObject).
       *
       * **Note:** This method mutates `object`.
       *
       * @static
       * @memberOf _
       * @since 4.6.0
       * @category Object
       * @param {Object} object The object to modify.
       * @param {Array|string} path The path of the property to set.
       * @param {Function} updater The function to produce the updated value.
       * @param {Function} [customizer] The function to customize assigned values.
       * @returns {Object} Returns `object`.
       * @example
       *
       * var object = {};
       *
       * _.updateWith(object, '[0][1]', _.constant('a'), Object);
       * // => { '0': { '1': 'a' } }
       */
      function updateWith(object, path, updater, customizer) {
        customizer = typeof customizer == 'function' ? customizer : undefined;
        return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
      }
  
      /**
       * Creates an array of the own enumerable string keyed property values of `object`.
       *
       * **Note:** Non-object values are coerced to objects.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Object
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property values.
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.values(new Foo);
       * // => [1, 2] (iteration order is not guaranteed)
       *
       * _.values('hi');
       * // => ['h', 'i']
       */
      function values(object) {
        return object == null ? [] : baseValues(object, keys(object));
      }
  
      /**
       * Creates an array of the own and inherited enumerable string keyed property
       * values of `object`.
       *
       * **Note:** Non-object values are coerced to objects.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Object
       * @param {Object} object The object to query.
       * @returns {Array} Returns the array of property values.
       * @example
       *
       * function Foo() {
       *   this.a = 1;
       *   this.b = 2;
       * }
       *
       * Foo.prototype.c = 3;
       *
       * _.valuesIn(new Foo);
       * // => [1, 2, 3] (iteration order is not guaranteed)
       */
      function valuesIn(object) {
        return object == null ? [] : baseValues(object, keysIn(object));
      }
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Clamps `number` within the inclusive `lower` and `upper` bounds.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Number
       * @param {number} number The number to clamp.
       * @param {number} [lower] The lower bound.
       * @param {number} upper The upper bound.
       * @returns {number} Returns the clamped number.
       * @example
       *
       * _.clamp(-10, -5, 5);
       * // => -5
       *
       * _.clamp(10, -5, 5);
       * // => 5
       */
      function clamp(number, lower, upper) {
        if (upper === undefined) {
          upper = lower;
          lower = undefined;
        }
        if (upper !== undefined) {
          upper = toNumber(upper);
          upper = upper === upper ? upper : 0;
        }
        if (lower !== undefined) {
          lower = toNumber(lower);
          lower = lower === lower ? lower : 0;
        }
        return baseClamp(toNumber(number), lower, upper);
      }
  
      /**
       * Checks if `n` is between `start` and up to, but not including, `end`. If
       * `end` is not specified, it's set to `start` with `start` then set to `0`.
       * If `start` is greater than `end` the params are swapped to support
       * negative ranges.
       *
       * @static
       * @memberOf _
       * @since 3.3.0
       * @category Number
       * @param {number} number The number to check.
       * @param {number} [start=0] The start of the range.
       * @param {number} end The end of the range.
       * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
       * @see _.range, _.rangeRight
       * @example
       *
       * _.inRange(3, 2, 4);
       * // => true
       *
       * _.inRange(4, 8);
       * // => true
       *
       * _.inRange(4, 2);
       * // => false
       *
       * _.inRange(2, 2);
       * // => false
       *
       * _.inRange(1.2, 2);
       * // => true
       *
       * _.inRange(5.2, 4);
       * // => false
       *
       * _.inRange(-3, -2, -6);
       * // => true
       */
      function inRange(number, start, end) {
        start = toFinite(start);
        if (end === undefined) {
          end = start;
          start = 0;
        } else {
          end = toFinite(end);
        }
        number = toNumber(number);
        return baseInRange(number, start, end);
      }
  
      /**
       * Produces a random number between the inclusive `lower` and `upper` bounds.
       * If only one argument is provided a number between `0` and the given number
       * is returned. If `floating` is `true`, or either `lower` or `upper` are
       * floats, a floating-point number is returned instead of an integer.
       *
       * **Note:** JavaScript follows the IEEE-754 standard for resolving
       * floating-point values which can produce unexpected results.
       *
       * @static
       * @memberOf _
       * @since 0.7.0
       * @category Number
       * @param {number} [lower=0] The lower bound.
       * @param {number} [upper=1] The upper bound.
       * @param {boolean} [floating] Specify returning a floating-point number.
       * @returns {number} Returns the random number.
       * @example
       *
       * _.random(0, 5);
       * // => an integer between 0 and 5
       *
       * _.random(5);
       * // => also an integer between 0 and 5
       *
       * _.random(5, true);
       * // => a floating-point number between 0 and 5
       *
       * _.random(1.2, 5.2);
       * // => a floating-point number between 1.2 and 5.2
       */
      function random(lower, upper, floating) {
        if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
          upper = floating = undefined;
        }
        if (floating === undefined) {
          if (typeof upper == 'boolean') {
            floating = upper;
            upper = undefined;
          }
          else if (typeof lower == 'boolean') {
            floating = lower;
            lower = undefined;
          }
        }
        if (lower === undefined && upper === undefined) {
          lower = 0;
          upper = 1;
        }
        else {
          lower = toFinite(lower);
          if (upper === undefined) {
            upper = lower;
            lower = 0;
          } else {
            upper = toFinite(upper);
          }
        }
        if (lower > upper) {
          var temp = lower;
          lower = upper;
          upper = temp;
        }
        if (floating || lower % 1 || upper % 1) {
          var rand = nativeRandom();
          return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
        }
        return baseRandom(lower, upper);
      }
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the camel cased string.
       * @example
       *
       * _.camelCase('Foo Bar');
       * // => 'fooBar'
       *
       * _.camelCase('--foo-bar--');
       * // => 'fooBar'
       *
       * _.camelCase('__FOO_BAR__');
       * // => 'fooBar'
       */
      var camelCase = createCompounder(function(result, word, index) {
        word = word.toLowerCase();
        return result + (index ? capitalize(word) : word);
      });
  
      /**
       * Converts the first character of `string` to upper case and the remaining
       * to lower case.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to capitalize.
       * @returns {string} Returns the capitalized string.
       * @example
       *
       * _.capitalize('FRED');
       * // => 'Fred'
       */
      function capitalize(string) {
        return upperFirst(toString(string).toLowerCase());
      }
  
      /**
       * Deburrs `string` by converting
       * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
       * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
       * letters to basic Latin letters and removing
       * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to deburr.
       * @returns {string} Returns the deburred string.
       * @example
       *
       * _.deburr('déjà vu');
       * // => 'deja vu'
       */
      function deburr(string) {
        string = toString(string);
        return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
      }
  
      /**
       * Checks if `string` ends with the given target string.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to inspect.
       * @param {string} [target] The string to search for.
       * @param {number} [position=string.length] The position to search up to.
       * @returns {boolean} Returns `true` if `string` ends with `target`,
       *  else `false`.
       * @example
       *
       * _.endsWith('abc', 'c');
       * // => true
       *
       * _.endsWith('abc', 'b');
       * // => false
       *
       * _.endsWith('abc', 'b', 2);
       * // => true
       */
      function endsWith(string, target, position) {
        string = toString(string);
        target = baseToString(target);
  
        var length = string.length;
        position = position === undefined
          ? length
          : baseClamp(toInteger(position), 0, length);
  
        var end = position;
        position -= target.length;
        return position >= 0 && string.slice(position, end) == target;
      }
  
      /**
       * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
       * corresponding HTML entities.
       *
       * **Note:** No other characters are escaped. To escape additional
       * characters use a third-party library like [_he_](https://mths.be/he).
       *
       * Though the ">" character is escaped for symmetry, characters like
       * ">" and "/" don't need escaping in HTML and have no special meaning
       * unless they're part of a tag or unquoted attribute value. See
       * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
       * (under "semi-related fun fact") for more details.
       *
       * When working with HTML you should always
       * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
       * XSS vectors.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category String
       * @param {string} [string=''] The string to escape.
       * @returns {string} Returns the escaped string.
       * @example
       *
       * _.escape('fred, barney, & pebbles');
       * // => 'fred, barney, &amp; pebbles'
       */
      function escape(string) {
        string = toString(string);
        return (string && reHasUnescapedHtml.test(string))
          ? string.replace(reUnescapedHtml, escapeHtmlChar)
          : string;
      }
  
      /**
       * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
       * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to escape.
       * @returns {string} Returns the escaped string.
       * @example
       *
       * _.escapeRegExp('[lodash](https://lodash.com/)');
       * // => '\[lodash\]\(https://lodash\.com/\)'
       */
      function escapeRegExp(string) {
        string = toString(string);
        return (string && reHasRegExpChar.test(string))
          ? string.replace(reRegExpChar, '\\$&')
          : string;
      }
  
      /**
       * Converts `string` to
       * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the kebab cased string.
       * @example
       *
       * _.kebabCase('Foo Bar');
       * // => 'foo-bar'
       *
       * _.kebabCase('fooBar');
       * // => 'foo-bar'
       *
       * _.kebabCase('__FOO_BAR__');
       * // => 'foo-bar'
       */
      var kebabCase = createCompounder(function(result, word, index) {
        return result + (index ? '-' : '') + word.toLowerCase();
      });
  
      /**
       * Converts `string`, as space separated words, to lower case.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the lower cased string.
       * @example
       *
       * _.lowerCase('--Foo-Bar--');
       * // => 'foo bar'
       *
       * _.lowerCase('fooBar');
       * // => 'foo bar'
       *
       * _.lowerCase('__FOO_BAR__');
       * // => 'foo bar'
       */
      var lowerCase = createCompounder(function(result, word, index) {
        return result + (index ? ' ' : '') + word.toLowerCase();
      });
  
      /**
       * Converts the first character of `string` to lower case.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the converted string.
       * @example
       *
       * _.lowerFirst('Fred');
       * // => 'fred'
       *
       * _.lowerFirst('FRED');
       * // => 'fRED'
       */
      var lowerFirst = createCaseFirst('toLowerCase');
  
      /**
       * Pads `string` on the left and right sides if it's shorter than `length`.
       * Padding characters are truncated if they can't be evenly divided by `length`.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to pad.
       * @param {number} [length=0] The padding length.
       * @param {string} [chars=' '] The string used as padding.
       * @returns {string} Returns the padded string.
       * @example
       *
       * _.pad('abc', 8);
       * // => '  abc   '
       *
       * _.pad('abc', 8, '_-');
       * // => '_-abc_-_'
       *
       * _.pad('abc', 3);
       * // => 'abc'
       */
      function pad(string, length, chars) {
        string = toString(string);
        length = toInteger(length);
  
        var strLength = length ? stringSize(string) : 0;
        if (!length || strLength >= length) {
          return string;
        }
        var mid = (length - strLength) / 2;
        return (
          createPadding(nativeFloor(mid), chars) +
          string +
          createPadding(nativeCeil(mid), chars)
        );
      }
  
      /**
       * Pads `string` on the right side if it's shorter than `length`. Padding
       * characters are truncated if they exceed `length`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to pad.
       * @param {number} [length=0] The padding length.
       * @param {string} [chars=' '] The string used as padding.
       * @returns {string} Returns the padded string.
       * @example
       *
       * _.padEnd('abc', 6);
       * // => 'abc   '
       *
       * _.padEnd('abc', 6, '_-');
       * // => 'abc_-_'
       *
       * _.padEnd('abc', 3);
       * // => 'abc'
       */
      function padEnd(string, length, chars) {
        string = toString(string);
        length = toInteger(length);
  
        var strLength = length ? stringSize(string) : 0;
        return (length && strLength < length)
          ? (string + createPadding(length - strLength, chars))
          : string;
      }
  
      /**
       * Pads `string` on the left side if it's shorter than `length`. Padding
       * characters are truncated if they exceed `length`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to pad.
       * @param {number} [length=0] The padding length.
       * @param {string} [chars=' '] The string used as padding.
       * @returns {string} Returns the padded string.
       * @example
       *
       * _.padStart('abc', 6);
       * // => '   abc'
       *
       * _.padStart('abc', 6, '_-');
       * // => '_-_abc'
       *
       * _.padStart('abc', 3);
       * // => 'abc'
       */
      function padStart(string, length, chars) {
        string = toString(string);
        length = toInteger(length);
  
        var strLength = length ? stringSize(string) : 0;
        return (length && strLength < length)
          ? (createPadding(length - strLength, chars) + string)
          : string;
      }
  
      /**
       * Converts `string` to an integer of the specified radix. If `radix` is
       * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
       * hexadecimal, in which case a `radix` of `16` is used.
       *
       * **Note:** This method aligns with the
       * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
       *
       * @static
       * @memberOf _
       * @since 1.1.0
       * @category String
       * @param {string} string The string to convert.
       * @param {number} [radix=10] The radix to interpret `value` by.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {number} Returns the converted integer.
       * @example
       *
       * _.parseInt('08');
       * // => 8
       *
       * _.map(['6', '08', '10'], _.parseInt);
       * // => [6, 8, 10]
       */
      function parseInt(string, radix, guard) {
        if (guard || radix == null) {
          radix = 0;
        } else if (radix) {
          radix = +radix;
        }
        return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
      }
  
      /**
       * Repeats the given string `n` times.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to repeat.
       * @param {number} [n=1] The number of times to repeat the string.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {string} Returns the repeated string.
       * @example
       *
       * _.repeat('*', 3);
       * // => '***'
       *
       * _.repeat('abc', 2);
       * // => 'abcabc'
       *
       * _.repeat('abc', 0);
       * // => ''
       */
      function repeat(string, n, guard) {
        if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
          n = 1;
        } else {
          n = toInteger(n);
        }
        return baseRepeat(toString(string), n);
      }
  
      /**
       * Replaces matches for `pattern` in `string` with `replacement`.
       *
       * **Note:** This method is based on
       * [`String#replace`](https://mdn.io/String/replace).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to modify.
       * @param {RegExp|string} pattern The pattern to replace.
       * @param {Function|string} replacement The match replacement.
       * @returns {string} Returns the modified string.
       * @example
       *
       * _.replace('Hi Fred', 'Fred', 'Barney');
       * // => 'Hi Barney'
       */
      function replace() {
        var args = arguments,
            string = toString(args[0]);
  
        return args.length < 3 ? string : string.replace(args[1], args[2]);
      }
  
      /**
       * Converts `string` to
       * [snake case](https://en.wikipedia.org/wiki/Snake_case).
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the snake cased string.
       * @example
       *
       * _.snakeCase('Foo Bar');
       * // => 'foo_bar'
       *
       * _.snakeCase('fooBar');
       * // => 'foo_bar'
       *
       * _.snakeCase('--FOO-BAR--');
       * // => 'foo_bar'
       */
      var snakeCase = createCompounder(function(result, word, index) {
        return result + (index ? '_' : '') + word.toLowerCase();
      });
  
      /**
       * Splits `string` by `separator`.
       *
       * **Note:** This method is based on
       * [`String#split`](https://mdn.io/String/split).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to split.
       * @param {RegExp|string} separator The separator pattern to split by.
       * @param {number} [limit] The length to truncate results to.
       * @returns {Array} Returns the string segments.
       * @example
       *
       * _.split('a-b-c', '-', 2);
       * // => ['a', 'b']
       */
      function split(string, separator, limit) {
        if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
          separator = limit = undefined;
        }
        limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
        if (!limit) {
          return [];
        }
        string = toString(string);
        if (string && (
              typeof separator == 'string' ||
              (separator != null && !isRegExp(separator))
            )) {
          separator = baseToString(separator);
          if (!separator && hasUnicode(string)) {
            return castSlice(stringToArray(string), 0, limit);
          }
        }
        return string.split(separator, limit);
      }
  
      /**
       * Converts `string` to
       * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
       *
       * @static
       * @memberOf _
       * @since 3.1.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the start cased string.
       * @example
       *
       * _.startCase('--foo-bar--');
       * // => 'Foo Bar'
       *
       * _.startCase('fooBar');
       * // => 'Foo Bar'
       *
       * _.startCase('__FOO_BAR__');
       * // => 'FOO BAR'
       */
      var startCase = createCompounder(function(result, word, index) {
        return result + (index ? ' ' : '') + upperFirst(word);
      });
  
      /**
       * Checks if `string` starts with the given target string.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to inspect.
       * @param {string} [target] The string to search for.
       * @param {number} [position=0] The position to search from.
       * @returns {boolean} Returns `true` if `string` starts with `target`,
       *  else `false`.
       * @example
       *
       * _.startsWith('abc', 'a');
       * // => true
       *
       * _.startsWith('abc', 'b');
       * // => false
       *
       * _.startsWith('abc', 'b', 1);
       * // => true
       */
      function startsWith(string, target, position) {
        string = toString(string);
        position = position == null
          ? 0
          : baseClamp(toInteger(position), 0, string.length);
  
        target = baseToString(target);
        return string.slice(position, position + target.length) == target;
      }
  
      /**
       * Creates a compiled template function that can interpolate data properties
       * in "interpolate" delimiters, HTML-escape interpolated data properties in
       * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
       * properties may be accessed as free variables in the template. If a setting
       * object is given, it takes precedence over `_.templateSettings` values.
       *
       * **Note:** In the development build `_.template` utilizes
       * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
       * for easier debugging.
       *
       * For more information on precompiling templates see
       * [lodash's custom builds documentation](https://lodash.com/custom-builds).
       *
       * For more information on Chrome extension sandboxes see
       * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category String
       * @param {string} [string=''] The template string.
       * @param {Object} [options={}] The options object.
       * @param {RegExp} [options.escape=_.templateSettings.escape]
       *  The HTML "escape" delimiter.
       * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
       *  The "evaluate" delimiter.
       * @param {Object} [options.imports=_.templateSettings.imports]
       *  An object to import into the template as free variables.
       * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
       *  The "interpolate" delimiter.
       * @param {string} [options.sourceURL='lodash.templateSources[n]']
       *  The sourceURL of the compiled template.
       * @param {string} [options.variable='obj']
       *  The data object variable name.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Function} Returns the compiled template function.
       * @example
       *
       * // Use the "interpolate" delimiter to create a compiled template.
       * var compiled = _.template('hello <%= user %>!');
       * compiled({ 'user': 'fred' });
       * // => 'hello fred!'
       *
       * // Use the HTML "escape" delimiter to escape data property values.
       * var compiled = _.template('<b><%- value %></b>');
       * compiled({ 'value': '<script>' });
       * // => '<b>&lt;script&gt;</b>'
       *
       * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
       * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
       * compiled({ 'users': ['fred', 'barney'] });
       * // => '<li>fred</li><li>barney</li>'
       *
       * // Use the internal `print` function in "evaluate" delimiters.
       * var compiled = _.template('<% print("hello " + user); %>!');
       * compiled({ 'user': 'barney' });
       * // => 'hello barney!'
       *
       * // Use the ES template literal delimiter as an "interpolate" delimiter.
       * // Disable support by replacing the "interpolate" delimiter.
       * var compiled = _.template('hello ${ user }!');
       * compiled({ 'user': 'pebbles' });
       * // => 'hello pebbles!'
       *
       * // Use backslashes to treat delimiters as plain text.
       * var compiled = _.template('<%= "\\<%- value %\\>" %>');
       * compiled({ 'value': 'ignored' });
       * // => '<%- value %>'
       *
       * // Use the `imports` option to import `jQuery` as `jq`.
       * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
       * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
       * compiled({ 'users': ['fred', 'barney'] });
       * // => '<li>fred</li><li>barney</li>'
       *
       * // Use the `sourceURL` option to specify a custom sourceURL for the template.
       * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
       * compiled(data);
       * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
       *
       * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
       * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
       * compiled.source;
       * // => function(data) {
       * //   var __t, __p = '';
       * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
       * //   return __p;
       * // }
       *
       * // Use custom template delimiters.
       * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
       * var compiled = _.template('hello {{ user }}!');
       * compiled({ 'user': 'mustache' });
       * // => 'hello mustache!'
       *
       * // Use the `source` property to inline compiled templates for meaningful
       * // line numbers in error messages and stack traces.
       * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
       *   var JST = {\
       *     "main": ' + _.template(mainText).source + '\
       *   };\
       * ');
       */
      function template(string, options, guard) {
        // Based on John Resig's `tmpl` implementation
        // (http://ejohn.org/blog/javascript-micro-templating/)
        // and Laura Doktorova's doT.js (https://github.com/olado/doT).
        var settings = lodash.templateSettings;
  
        if (guard && isIterateeCall(string, options, guard)) {
          options = undefined;
        }
        string = toString(string);
        options = assignInWith({}, options, settings, customDefaultsAssignIn);
  
        var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
            importsKeys = keys(imports),
            importsValues = baseValues(imports, importsKeys);
  
        var isEscaping,
            isEvaluating,
            index = 0,
            interpolate = options.interpolate || reNoMatch,
            source = "__p += '";
  
        // Compile the regexp to match each delimiter.
        var reDelimiters = RegExp(
          (options.escape || reNoMatch).source + '|' +
          interpolate.source + '|' +
          (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
          (options.evaluate || reNoMatch).source + '|$'
        , 'g');
  
        // Use a sourceURL for easier debugging.
        var sourceURL = '//# sourceURL=' +
          ('sourceURL' in options
            ? options.sourceURL
            : ('lodash.templateSources[' + (++templateCounter) + ']')
          ) + '\n';
  
        string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
          interpolateValue || (interpolateValue = esTemplateValue);
  
          // Escape characters that can't be included in string literals.
          source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
  
          // Replace delimiters with snippets.
          if (escapeValue) {
            isEscaping = true;
            source += "' +\n__e(" + escapeValue + ") +\n'";
          }
          if (evaluateValue) {
            isEvaluating = true;
            source += "';\n" + evaluateValue + ";\n__p += '";
          }
          if (interpolateValue) {
            source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
          }
          index = offset + match.length;
  
          // The JS engine embedded in Adobe products needs `match` returned in
          // order to produce the correct `offset` value.
          return match;
        });
  
        source += "';\n";
  
        // If `variable` is not specified wrap a with-statement around the generated
        // code to add the data object to the top of the scope chain.
        var variable = options.variable;
        if (!variable) {
          source = 'with (obj) {\n' + source + '\n}\n';
        }
        // Cleanup code by stripping empty strings.
        source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
          .replace(reEmptyStringMiddle, '$1')
          .replace(reEmptyStringTrailing, '$1;');
  
        // Frame code as the function body.
        source = 'function(' + (variable || 'obj') + ') {\n' +
          (variable
            ? ''
            : 'obj || (obj = {});\n'
          ) +
          "var __t, __p = ''" +
          (isEscaping
             ? ', __e = _.escape'
             : ''
          ) +
          (isEvaluating
            ? ', __j = Array.prototype.join;\n' +
              "function print() { __p += __j.call(arguments, '') }\n"
            : ';\n'
          ) +
          source +
          'return __p\n}';
  
        var result = attempt(function() {
          return Function(importsKeys, sourceURL + 'return ' + source)
            .apply(undefined, importsValues);
        });
  
        // Provide the compiled function's source by its `toString` method or
        // the `source` property as a convenience for inlining compiled templates.
        result.source = source;
        if (isError(result)) {
          throw result;
        }
        return result;
      }
  
      /**
       * Converts `string`, as a whole, to lower case just like
       * [String#toLowerCase](https://mdn.io/toLowerCase).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the lower cased string.
       * @example
       *
       * _.toLower('--Foo-Bar--');
       * // => '--foo-bar--'
       *
       * _.toLower('fooBar');
       * // => 'foobar'
       *
       * _.toLower('__FOO_BAR__');
       * // => '__foo_bar__'
       */
      function toLower(value) {
        return toString(value).toLowerCase();
      }
  
      /**
       * Converts `string`, as a whole, to upper case just like
       * [String#toUpperCase](https://mdn.io/toUpperCase).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the upper cased string.
       * @example
       *
       * _.toUpper('--foo-bar--');
       * // => '--FOO-BAR--'
       *
       * _.toUpper('fooBar');
       * // => 'FOOBAR'
       *
       * _.toUpper('__foo_bar__');
       * // => '__FOO_BAR__'
       */
      function toUpper(value) {
        return toString(value).toUpperCase();
      }
  
      /**
       * Removes leading and trailing whitespace or specified characters from `string`.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to trim.
       * @param {string} [chars=whitespace] The characters to trim.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {string} Returns the trimmed string.
       * @example
       *
       * _.trim('  abc  ');
       * // => 'abc'
       *
       * _.trim('-_-abc-_-', '_-');
       * // => 'abc'
       *
       * _.map(['  foo  ', '  bar  '], _.trim);
       * // => ['foo', 'bar']
       */
      function trim(string, chars, guard) {
        string = toString(string);
        if (string && (guard || chars === undefined)) {
          return string.replace(reTrim, '');
        }
        if (!string || !(chars = baseToString(chars))) {
          return string;
        }
        var strSymbols = stringToArray(string),
            chrSymbols = stringToArray(chars),
            start = charsStartIndex(strSymbols, chrSymbols),
            end = charsEndIndex(strSymbols, chrSymbols) + 1;
  
        return castSlice(strSymbols, start, end).join('');
      }
  
      /**
       * Removes trailing whitespace or specified characters from `string`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to trim.
       * @param {string} [chars=whitespace] The characters to trim.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {string} Returns the trimmed string.
       * @example
       *
       * _.trimEnd('  abc  ');
       * // => '  abc'
       *
       * _.trimEnd('-_-abc-_-', '_-');
       * // => '-_-abc'
       */
      function trimEnd(string, chars, guard) {
        string = toString(string);
        if (string && (guard || chars === undefined)) {
          return string.replace(reTrimEnd, '');
        }
        if (!string || !(chars = baseToString(chars))) {
          return string;
        }
        var strSymbols = stringToArray(string),
            end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
  
        return castSlice(strSymbols, 0, end).join('');
      }
  
      /**
       * Removes leading whitespace or specified characters from `string`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to trim.
       * @param {string} [chars=whitespace] The characters to trim.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {string} Returns the trimmed string.
       * @example
       *
       * _.trimStart('  abc  ');
       * // => 'abc  '
       *
       * _.trimStart('-_-abc-_-', '_-');
       * // => 'abc-_-'
       */
      function trimStart(string, chars, guard) {
        string = toString(string);
        if (string && (guard || chars === undefined)) {
          return string.replace(reTrimStart, '');
        }
        if (!string || !(chars = baseToString(chars))) {
          return string;
        }
        var strSymbols = stringToArray(string),
            start = charsStartIndex(strSymbols, stringToArray(chars));
  
        return castSlice(strSymbols, start).join('');
      }
  
      /**
       * Truncates `string` if it's longer than the given maximum string length.
       * The last characters of the truncated string are replaced with the omission
       * string which defaults to "...".
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to truncate.
       * @param {Object} [options={}] The options object.
       * @param {number} [options.length=30] The maximum string length.
       * @param {string} [options.omission='...'] The string to indicate text is omitted.
       * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
       * @returns {string} Returns the truncated string.
       * @example
       *
       * _.truncate('hi-diddly-ho there, neighborino');
       * // => 'hi-diddly-ho there, neighbo...'
       *
       * _.truncate('hi-diddly-ho there, neighborino', {
       *   'length': 24,
       *   'separator': ' '
       * });
       * // => 'hi-diddly-ho there,...'
       *
       * _.truncate('hi-diddly-ho there, neighborino', {
       *   'length': 24,
       *   'separator': /,? +/
       * });
       * // => 'hi-diddly-ho there...'
       *
       * _.truncate('hi-diddly-ho there, neighborino', {
       *   'omission': ' [...]'
       * });
       * // => 'hi-diddly-ho there, neig [...]'
       */
      function truncate(string, options) {
        var length = DEFAULT_TRUNC_LENGTH,
            omission = DEFAULT_TRUNC_OMISSION;
  
        if (isObject(options)) {
          var separator = 'separator' in options ? options.separator : separator;
          length = 'length' in options ? toInteger(options.length) : length;
          omission = 'omission' in options ? baseToString(options.omission) : omission;
        }
        string = toString(string);
  
        var strLength = string.length;
        if (hasUnicode(string)) {
          var strSymbols = stringToArray(string);
          strLength = strSymbols.length;
        }
        if (length >= strLength) {
          return string;
        }
        var end = length - stringSize(omission);
        if (end < 1) {
          return omission;
        }
        var result = strSymbols
          ? castSlice(strSymbols, 0, end).join('')
          : string.slice(0, end);
  
        if (separator === undefined) {
          return result + omission;
        }
        if (strSymbols) {
          end += (result.length - end);
        }
        if (isRegExp(separator)) {
          if (string.slice(end).search(separator)) {
            var match,
                substring = result;
  
            if (!separator.global) {
              separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
            }
            separator.lastIndex = 0;
            while ((match = separator.exec(substring))) {
              var newEnd = match.index;
            }
            result = result.slice(0, newEnd === undefined ? end : newEnd);
          }
        } else if (string.indexOf(baseToString(separator), end) != end) {
          var index = result.lastIndexOf(separator);
          if (index > -1) {
            result = result.slice(0, index);
          }
        }
        return result + omission;
      }
  
      /**
       * The inverse of `_.escape`; this method converts the HTML entities
       * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
       * their corresponding characters.
       *
       * **Note:** No other HTML entities are unescaped. To unescape additional
       * HTML entities use a third-party library like [_he_](https://mths.be/he).
       *
       * @static
       * @memberOf _
       * @since 0.6.0
       * @category String
       * @param {string} [string=''] The string to unescape.
       * @returns {string} Returns the unescaped string.
       * @example
       *
       * _.unescape('fred, barney, &amp; pebbles');
       * // => 'fred, barney, & pebbles'
       */
      function unescape(string) {
        string = toString(string);
        return (string && reHasEscapedHtml.test(string))
          ? string.replace(reEscapedHtml, unescapeHtmlChar)
          : string;
      }
  
      /**
       * Converts `string`, as space separated words, to upper case.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the upper cased string.
       * @example
       *
       * _.upperCase('--foo-bar');
       * // => 'FOO BAR'
       *
       * _.upperCase('fooBar');
       * // => 'FOO BAR'
       *
       * _.upperCase('__foo_bar__');
       * // => 'FOO BAR'
       */
      var upperCase = createCompounder(function(result, word, index) {
        return result + (index ? ' ' : '') + word.toUpperCase();
      });
  
      /**
       * Converts the first character of `string` to upper case.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category String
       * @param {string} [string=''] The string to convert.
       * @returns {string} Returns the converted string.
       * @example
       *
       * _.upperFirst('fred');
       * // => 'Fred'
       *
       * _.upperFirst('FRED');
       * // => 'FRED'
       */
      var upperFirst = createCaseFirst('toUpperCase');
  
      /**
       * Splits `string` into an array of its words.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category String
       * @param {string} [string=''] The string to inspect.
       * @param {RegExp|string} [pattern] The pattern to match words.
       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
       * @returns {Array} Returns the words of `string`.
       * @example
       *
       * _.words('fred, barney, & pebbles');
       * // => ['fred', 'barney', 'pebbles']
       *
       * _.words('fred, barney, & pebbles', /[^, ]+/g);
       * // => ['fred', 'barney', '&', 'pebbles']
       */
      function words(string, pattern, guard) {
        string = toString(string);
        pattern = guard ? undefined : pattern;
  
        if (pattern === undefined) {
          return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
        }
        return string.match(pattern) || [];
      }
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Attempts to invoke `func`, returning either the result or the caught error
       * object. Any additional arguments are provided to `func` when it's invoked.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Util
       * @param {Function} func The function to attempt.
       * @param {...*} [args] The arguments to invoke `func` with.
       * @returns {*} Returns the `func` result or error object.
       * @example
       *
       * // Avoid throwing errors for invalid selectors.
       * var elements = _.attempt(function(selector) {
       *   return document.querySelectorAll(selector);
       * }, '>_>');
       *
       * if (_.isError(elements)) {
       *   elements = [];
       * }
       */
      var attempt = baseRest(function(func, args) {
        try {
          return apply(func, undefined, args);
        } catch (e) {
          return isError(e) ? e : new Error(e);
        }
      });
  
      /**
       * Binds methods of an object to the object itself, overwriting the existing
       * method.
       *
       * **Note:** This method doesn't set the "length" property of bound functions.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Util
       * @param {Object} object The object to bind and assign the bound methods to.
       * @param {...(string|string[])} methodNames The object method names to bind.
       * @returns {Object} Returns `object`.
       * @example
       *
       * var view = {
       *   'label': 'docs',
       *   'click': function() {
       *     console.log('clicked ' + this.label);
       *   }
       * };
       *
       * _.bindAll(view, ['click']);
       * jQuery(element).on('click', view.click);
       * // => Logs 'clicked docs' when clicked.
       */
      var bindAll = flatRest(function(object, methodNames) {
        arrayEach(methodNames, function(key) {
          key = toKey(key);
          baseAssignValue(object, key, bind(object[key], object));
        });
        return object;
      });
  
      /**
       * Creates a function that iterates over `pairs` and invokes the corresponding
       * function of the first predicate to return truthy. The predicate-function
       * pairs are invoked with the `this` binding and arguments of the created
       * function.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Util
       * @param {Array} pairs The predicate-function pairs.
       * @returns {Function} Returns the new composite function.
       * @example
       *
       * var func = _.cond([
       *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
       *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
       *   [_.stubTrue,                      _.constant('no match')]
       * ]);
       *
       * func({ 'a': 1, 'b': 2 });
       * // => 'matches A'
       *
       * func({ 'a': 0, 'b': 1 });
       * // => 'matches B'
       *
       * func({ 'a': '1', 'b': '2' });
       * // => 'no match'
       */
      function cond(pairs) {
        var length = pairs == null ? 0 : pairs.length,
            toIteratee = getIteratee();
  
        pairs = !length ? [] : arrayMap(pairs, function(pair) {
          if (typeof pair[1] != 'function') {
            throw new TypeError(FUNC_ERROR_TEXT);
          }
          return [toIteratee(pair[0]), pair[1]];
        });
  
        return baseRest(function(args) {
          var index = -1;
          while (++index < length) {
            var pair = pairs[index];
            if (apply(pair[0], this, args)) {
              return apply(pair[1], this, args);
            }
          }
        });
      }
  
      /**
       * Creates a function that invokes the predicate properties of `source` with
       * the corresponding property values of a given object, returning `true` if
       * all predicates return truthy, else `false`.
       *
       * **Note:** The created function is equivalent to `_.conformsTo` with
       * `source` partially applied.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Util
       * @param {Object} source The object of property predicates to conform to.
       * @returns {Function} Returns the new spec function.
       * @example
       *
       * var objects = [
       *   { 'a': 2, 'b': 1 },
       *   { 'a': 1, 'b': 2 }
       * ];
       *
       * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
       * // => [{ 'a': 1, 'b': 2 }]
       */
      function conforms(source) {
        return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
      }
  
      /**
       * Creates a function that returns `value`.
       *
       * @static
       * @memberOf _
       * @since 2.4.0
       * @category Util
       * @param {*} value The value to return from the new function.
       * @returns {Function} Returns the new constant function.
       * @example
       *
       * var objects = _.times(2, _.constant({ 'a': 1 }));
       *
       * console.log(objects);
       * // => [{ 'a': 1 }, { 'a': 1 }]
       *
       * console.log(objects[0] === objects[1]);
       * // => true
       */
      function constant(value) {
        return function() {
          return value;
        };
      }
  
      /**
       * Checks `value` to determine whether a default value should be returned in
       * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
       * or `undefined`.
       *
       * @static
       * @memberOf _
       * @since 4.14.0
       * @category Util
       * @param {*} value The value to check.
       * @param {*} defaultValue The default value.
       * @returns {*} Returns the resolved value.
       * @example
       *
       * _.defaultTo(1, 10);
       * // => 1
       *
       * _.defaultTo(undefined, 10);
       * // => 10
       */
      function defaultTo(value, defaultValue) {
        return (value == null || value !== value) ? defaultValue : value;
      }
  
      /**
       * Creates a function that returns the result of invoking the given functions
       * with the `this` binding of the created function, where each successive
       * invocation is supplied the return value of the previous.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Util
       * @param {...(Function|Function[])} [funcs] The functions to invoke.
       * @returns {Function} Returns the new composite function.
       * @see _.flowRight
       * @example
       *
       * function square(n) {
       *   return n * n;
       * }
       *
       * var addSquare = _.flow([_.add, square]);
       * addSquare(1, 2);
       * // => 9
       */
      var flow = createFlow();
  
      /**
       * This method is like `_.flow` except that it creates a function that
       * invokes the given functions from right to left.
       *
       * @static
       * @since 3.0.0
       * @memberOf _
       * @category Util
       * @param {...(Function|Function[])} [funcs] The functions to invoke.
       * @returns {Function} Returns the new composite function.
       * @see _.flow
       * @example
       *
       * function square(n) {
       *   return n * n;
       * }
       *
       * var addSquare = _.flowRight([square, _.add]);
       * addSquare(1, 2);
       * // => 9
       */
      var flowRight = createFlow(true);
  
      /**
       * This method returns the first argument it receives.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Util
       * @param {*} value Any value.
       * @returns {*} Returns `value`.
       * @example
       *
       * var object = { 'a': 1 };
       *
       * console.log(_.identity(object) === object);
       * // => true
       */
      function identity(value) {
        return value;
      }
  
      /**
       * Creates a function that invokes `func` with the arguments of the created
       * function. If `func` is a property name, the created function returns the
       * property value for a given element. If `func` is an array or object, the
       * created function returns `true` for elements that contain the equivalent
       * source properties, otherwise it returns `false`.
       *
       * @static
       * @since 4.0.0
       * @memberOf _
       * @category Util
       * @param {*} [func=_.identity] The value to convert to a callback.
       * @returns {Function} Returns the callback.
       * @example
       *
       * var users = [
       *   { 'user': 'barney', 'age': 36, 'active': true },
       *   { 'user': 'fred',   'age': 40, 'active': false }
       * ];
       *
       * // The `_.matches` iteratee shorthand.
       * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
       * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
       *
       * // The `_.matchesProperty` iteratee shorthand.
       * _.filter(users, _.iteratee(['user', 'fred']));
       * // => [{ 'user': 'fred', 'age': 40 }]
       *
       * // The `_.property` iteratee shorthand.
       * _.map(users, _.iteratee('user'));
       * // => ['barney', 'fred']
       *
       * // Create custom iteratee shorthands.
       * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
       *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
       *     return func.test(string);
       *   };
       * });
       *
       * _.filter(['abc', 'def'], /ef/);
       * // => ['def']
       */
      function iteratee(func) {
        return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
      }
  
      /**
       * Creates a function that performs a partial deep comparison between a given
       * object and `source`, returning `true` if the given object has equivalent
       * property values, else `false`.
       *
       * **Note:** The created function is equivalent to `_.isMatch` with `source`
       * partially applied.
       *
       * Partial comparisons will match empty array and empty object `source`
       * values against any array or object value, respectively. See `_.isEqual`
       * for a list of supported value comparisons.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Util
       * @param {Object} source The object of property values to match.
       * @returns {Function} Returns the new spec function.
       * @example
       *
       * var objects = [
       *   { 'a': 1, 'b': 2, 'c': 3 },
       *   { 'a': 4, 'b': 5, 'c': 6 }
       * ];
       *
       * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
       * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
       */
      function matches(source) {
        return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
      }
  
      /**
       * Creates a function that performs a partial deep comparison between the
       * value at `path` of a given object to `srcValue`, returning `true` if the
       * object value is equivalent, else `false`.
       *
       * **Note:** Partial comparisons will match empty array and empty object
       * `srcValue` values against any array or object value, respectively. See
       * `_.isEqual` for a list of supported value comparisons.
       *
       * @static
       * @memberOf _
       * @since 3.2.0
       * @category Util
       * @param {Array|string} path The path of the property to get.
       * @param {*} srcValue The value to match.
       * @returns {Function} Returns the new spec function.
       * @example
       *
       * var objects = [
       *   { 'a': 1, 'b': 2, 'c': 3 },
       *   { 'a': 4, 'b': 5, 'c': 6 }
       * ];
       *
       * _.find(objects, _.matchesProperty('a', 4));
       * // => { 'a': 4, 'b': 5, 'c': 6 }
       */
      function matchesProperty(path, srcValue) {
        return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
      }
  
      /**
       * Creates a function that invokes the method at `path` of a given object.
       * Any additional arguments are provided to the invoked method.
       *
       * @static
       * @memberOf _
       * @since 3.7.0
       * @category Util
       * @param {Array|string} path The path of the method to invoke.
       * @param {...*} [args] The arguments to invoke the method with.
       * @returns {Function} Returns the new invoker function.
       * @example
       *
       * var objects = [
       *   { 'a': { 'b': _.constant(2) } },
       *   { 'a': { 'b': _.constant(1) } }
       * ];
       *
       * _.map(objects, _.method('a.b'));
       * // => [2, 1]
       *
       * _.map(objects, _.method(['a', 'b']));
       * // => [2, 1]
       */
      var method = baseRest(function(path, args) {
        return function(object) {
          return baseInvoke(object, path, args);
        };
      });
  
      /**
       * The opposite of `_.method`; this method creates a function that invokes
       * the method at a given path of `object`. Any additional arguments are
       * provided to the invoked method.
       *
       * @static
       * @memberOf _
       * @since 3.7.0
       * @category Util
       * @param {Object} object The object to query.
       * @param {...*} [args] The arguments to invoke the method with.
       * @returns {Function} Returns the new invoker function.
       * @example
       *
       * var array = _.times(3, _.constant),
       *     object = { 'a': array, 'b': array, 'c': array };
       *
       * _.map(['a[2]', 'c[0]'], _.methodOf(object));
       * // => [2, 0]
       *
       * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
       * // => [2, 0]
       */
      var methodOf = baseRest(function(object, args) {
        return function(path) {
          return baseInvoke(object, path, args);
        };
      });
  
      /**
       * Adds all own enumerable string keyed function properties of a source
       * object to the destination object. If `object` is a function, then methods
       * are added to its prototype as well.
       *
       * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
       * avoid conflicts caused by modifying the original.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Util
       * @param {Function|Object} [object=lodash] The destination object.
       * @param {Object} source The object of functions to add.
       * @param {Object} [options={}] The options object.
       * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
       * @returns {Function|Object} Returns `object`.
       * @example
       *
       * function vowels(string) {
       *   return _.filter(string, function(v) {
       *     return /[aeiou]/i.test(v);
       *   });
       * }
       *
       * _.mixin({ 'vowels': vowels });
       * _.vowels('fred');
       * // => ['e']
       *
       * _('fred').vowels().value();
       * // => ['e']
       *
       * _.mixin({ 'vowels': vowels }, { 'chain': false });
       * _('fred').vowels();
       * // => ['e']
       */
      function mixin(object, source, options) {
        var props = keys(source),
            methodNames = baseFunctions(source, props);
  
        if (options == null &&
            !(isObject(source) && (methodNames.length || !props.length))) {
          options = source;
          source = object;
          object = this;
          methodNames = baseFunctions(source, keys(source));
        }
        var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
            isFunc = isFunction(object);
  
        arrayEach(methodNames, function(methodName) {
          var func = source[methodName];
          object[methodName] = func;
          if (isFunc) {
            object.prototype[methodName] = function() {
              var chainAll = this.__chain__;
              if (chain || chainAll) {
                var result = object(this.__wrapped__),
                    actions = result.__actions__ = copyArray(this.__actions__);
  
                actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
                result.__chain__ = chainAll;
                return result;
              }
              return func.apply(object, arrayPush([this.value()], arguments));
            };
          }
        });
  
        return object;
      }
  
      /**
       * Reverts the `_` variable to its previous value and returns a reference to
       * the `lodash` function.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Util
       * @returns {Function} Returns the `lodash` function.
       * @example
       *
       * var lodash = _.noConflict();
       */
      function noConflict() {
        if (root._ === this) {
          root._ = oldDash;
        }
        return this;
      }
  
      /**
       * This method returns `undefined`.
       *
       * @static
       * @memberOf _
       * @since 2.3.0
       * @category Util
       * @example
       *
       * _.times(2, _.noop);
       * // => [undefined, undefined]
       */
      function noop() {
        // No operation performed.
      }
  
      /**
       * Creates a function that gets the argument at index `n`. If `n` is negative,
       * the nth argument from the end is returned.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Util
       * @param {number} [n=0] The index of the argument to return.
       * @returns {Function} Returns the new pass-thru function.
       * @example
       *
       * var func = _.nthArg(1);
       * func('a', 'b', 'c', 'd');
       * // => 'b'
       *
       * var func = _.nthArg(-2);
       * func('a', 'b', 'c', 'd');
       * // => 'c'
       */
      function nthArg(n) {
        n = toInteger(n);
        return baseRest(function(args) {
          return baseNth(args, n);
        });
      }
  
      /**
       * Creates a function that invokes `iteratees` with the arguments it receives
       * and returns their results.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Util
       * @param {...(Function|Function[])} [iteratees=[_.identity]]
       *  The iteratees to invoke.
       * @returns {Function} Returns the new function.
       * @example
       *
       * var func = _.over([Math.max, Math.min]);
       *
       * func(1, 2, 3, 4);
       * // => [4, 1]
       */
      var over = createOver(arrayMap);
  
      /**
       * Creates a function that checks if **all** of the `predicates` return
       * truthy when invoked with the arguments it receives.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Util
       * @param {...(Function|Function[])} [predicates=[_.identity]]
       *  The predicates to check.
       * @returns {Function} Returns the new function.
       * @example
       *
       * var func = _.overEvery([Boolean, isFinite]);
       *
       * func('1');
       * // => true
       *
       * func(null);
       * // => false
       *
       * func(NaN);
       * // => false
       */
      var overEvery = createOver(arrayEvery);
  
      /**
       * Creates a function that checks if **any** of the `predicates` return
       * truthy when invoked with the arguments it receives.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Util
       * @param {...(Function|Function[])} [predicates=[_.identity]]
       *  The predicates to check.
       * @returns {Function} Returns the new function.
       * @example
       *
       * var func = _.overSome([Boolean, isFinite]);
       *
       * func('1');
       * // => true
       *
       * func(null);
       * // => true
       *
       * func(NaN);
       * // => false
       */
      var overSome = createOver(arraySome);
  
      /**
       * Creates a function that returns the value at `path` of a given object.
       *
       * @static
       * @memberOf _
       * @since 2.4.0
       * @category Util
       * @param {Array|string} path The path of the property to get.
       * @returns {Function} Returns the new accessor function.
       * @example
       *
       * var objects = [
       *   { 'a': { 'b': 2 } },
       *   { 'a': { 'b': 1 } }
       * ];
       *
       * _.map(objects, _.property('a.b'));
       * // => [2, 1]
       *
       * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
       * // => [1, 2]
       */
      function property(path) {
        return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
      }
  
      /**
       * The opposite of `_.property`; this method creates a function that returns
       * the value at a given path of `object`.
       *
       * @static
       * @memberOf _
       * @since 3.0.0
       * @category Util
       * @param {Object} object The object to query.
       * @returns {Function} Returns the new accessor function.
       * @example
       *
       * var array = [0, 1, 2],
       *     object = { 'a': array, 'b': array, 'c': array };
       *
       * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
       * // => [2, 0]
       *
       * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
       * // => [2, 0]
       */
      function propertyOf(object) {
        return function(path) {
          return object == null ? undefined : baseGet(object, path);
        };
      }
  
      /**
       * Creates an array of numbers (positive and/or negative) progressing from
       * `start` up to, but not including, `end`. A step of `-1` is used if a negative
       * `start` is specified without an `end` or `step`. If `end` is not specified,
       * it's set to `start` with `start` then set to `0`.
       *
       * **Note:** JavaScript follows the IEEE-754 standard for resolving
       * floating-point values which can produce unexpected results.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Util
       * @param {number} [start=0] The start of the range.
       * @param {number} end The end of the range.
       * @param {number} [step=1] The value to increment or decrement by.
       * @returns {Array} Returns the range of numbers.
       * @see _.inRange, _.rangeRight
       * @example
       *
       * _.range(4);
       * // => [0, 1, 2, 3]
       *
       * _.range(-4);
       * // => [0, -1, -2, -3]
       *
       * _.range(1, 5);
       * // => [1, 2, 3, 4]
       *
       * _.range(0, 20, 5);
       * // => [0, 5, 10, 15]
       *
       * _.range(0, -4, -1);
       * // => [0, -1, -2, -3]
       *
       * _.range(1, 4, 0);
       * // => [1, 1, 1]
       *
       * _.range(0);
       * // => []
       */
      var range = createRange();
  
      /**
       * This method is like `_.range` except that it populates values in
       * descending order.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Util
       * @param {number} [start=0] The start of the range.
       * @param {number} end The end of the range.
       * @param {number} [step=1] The value to increment or decrement by.
       * @returns {Array} Returns the range of numbers.
       * @see _.inRange, _.range
       * @example
       *
       * _.rangeRight(4);
       * // => [3, 2, 1, 0]
       *
       * _.rangeRight(-4);
       * // => [-3, -2, -1, 0]
       *
       * _.rangeRight(1, 5);
       * // => [4, 3, 2, 1]
       *
       * _.rangeRight(0, 20, 5);
       * // => [15, 10, 5, 0]
       *
       * _.rangeRight(0, -4, -1);
       * // => [-3, -2, -1, 0]
       *
       * _.rangeRight(1, 4, 0);
       * // => [1, 1, 1]
       *
       * _.rangeRight(0);
       * // => []
       */
      var rangeRight = createRange(true);
  
      /**
       * This method returns a new empty array.
       *
       * @static
       * @memberOf _
       * @since 4.13.0
       * @category Util
       * @returns {Array} Returns the new empty array.
       * @example
       *
       * var arrays = _.times(2, _.stubArray);
       *
       * console.log(arrays);
       * // => [[], []]
       *
       * console.log(arrays[0] === arrays[1]);
       * // => false
       */
      function stubArray() {
        return [];
      }
  
      /**
       * This method returns `false`.
       *
       * @static
       * @memberOf _
       * @since 4.13.0
       * @category Util
       * @returns {boolean} Returns `false`.
       * @example
       *
       * _.times(2, _.stubFalse);
       * // => [false, false]
       */
      function stubFalse() {
        return false;
      }
  
      /**
       * This method returns a new empty object.
       *
       * @static
       * @memberOf _
       * @since 4.13.0
       * @category Util
       * @returns {Object} Returns the new empty object.
       * @example
       *
       * var objects = _.times(2, _.stubObject);
       *
       * console.log(objects);
       * // => [{}, {}]
       *
       * console.log(objects[0] === objects[1]);
       * // => false
       */
      function stubObject() {
        return {};
      }
  
      /**
       * This method returns an empty string.
       *
       * @static
       * @memberOf _
       * @since 4.13.0
       * @category Util
       * @returns {string} Returns the empty string.
       * @example
       *
       * _.times(2, _.stubString);
       * // => ['', '']
       */
      function stubString() {
        return '';
      }
  
      /**
       * This method returns `true`.
       *
       * @static
       * @memberOf _
       * @since 4.13.0
       * @category Util
       * @returns {boolean} Returns `true`.
       * @example
       *
       * _.times(2, _.stubTrue);
       * // => [true, true]
       */
      function stubTrue() {
        return true;
      }
  
      /**
       * Invokes the iteratee `n` times, returning an array of the results of
       * each invocation. The iteratee is invoked with one argument; (index).
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Util
       * @param {number} n The number of times to invoke `iteratee`.
       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
       * @returns {Array} Returns the array of results.
       * @example
       *
       * _.times(3, String);
       * // => ['0', '1', '2']
       *
       *  _.times(4, _.constant(0));
       * // => [0, 0, 0, 0]
       */
      function times(n, iteratee) {
        n = toInteger(n);
        if (n < 1 || n > MAX_SAFE_INTEGER) {
          return [];
        }
        var index = MAX_ARRAY_LENGTH,
            length = nativeMin(n, MAX_ARRAY_LENGTH);
  
        iteratee = getIteratee(iteratee);
        n -= MAX_ARRAY_LENGTH;
  
        var result = baseTimes(length, iteratee);
        while (++index < n) {
          iteratee(index);
        }
        return result;
      }
  
      /**
       * Converts `value` to a property path array.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Util
       * @param {*} value The value to convert.
       * @returns {Array} Returns the new property path array.
       * @example
       *
       * _.toPath('a.b.c');
       * // => ['a', 'b', 'c']
       *
       * _.toPath('a[0].b.c');
       * // => ['a', '0', 'b', 'c']
       */
      function toPath(value) {
        if (isArray(value)) {
          return arrayMap(value, toKey);
        }
        return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
      }
  
      /**
       * Generates a unique ID. If `prefix` is given, the ID is appended to it.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Util
       * @param {string} [prefix=''] The value to prefix the ID with.
       * @returns {string} Returns the unique ID.
       * @example
       *
       * _.uniqueId('contact_');
       * // => 'contact_104'
       *
       * _.uniqueId();
       * // => '105'
       */
      function uniqueId(prefix) {
        var id = ++idCounter;
        return toString(prefix) + id;
      }
  
      /*------------------------------------------------------------------------*/
  
      /**
       * Adds two numbers.
       *
       * @static
       * @memberOf _
       * @since 3.4.0
       * @category Math
       * @param {number} augend The first number in an addition.
       * @param {number} addend The second number in an addition.
       * @returns {number} Returns the total.
       * @example
       *
       * _.add(6, 4);
       * // => 10
       */
      var add = createMathOperation(function(augend, addend) {
        return augend + addend;
      }, 0);
  
      /**
       * Computes `number` rounded up to `precision`.
       *
       * @static
       * @memberOf _
       * @since 3.10.0
       * @category Math
       * @param {number} number The number to round up.
       * @param {number} [precision=0] The precision to round up to.
       * @returns {number} Returns the rounded up number.
       * @example
       *
       * _.ceil(4.006);
       * // => 5
       *
       * _.ceil(6.004, 2);
       * // => 6.01
       *
       * _.ceil(6040, -2);
       * // => 6100
       */
      var ceil = createRound('ceil');
  
      /**
       * Divide two numbers.
       *
       * @static
       * @memberOf _
       * @since 4.7.0
       * @category Math
       * @param {number} dividend The first number in a division.
       * @param {number} divisor The second number in a division.
       * @returns {number} Returns the quotient.
       * @example
       *
       * _.divide(6, 4);
       * // => 1.5
       */
      var divide = createMathOperation(function(dividend, divisor) {
        return dividend / divisor;
      }, 1);
  
      /**
       * Computes `number` rounded down to `precision`.
       *
       * @static
       * @memberOf _
       * @since 3.10.0
       * @category Math
       * @param {number} number The number to round down.
       * @param {number} [precision=0] The precision to round down to.
       * @returns {number} Returns the rounded down number.
       * @example
       *
       * _.floor(4.006);
       * // => 4
       *
       * _.floor(0.046, 2);
       * // => 0.04
       *
       * _.floor(4060, -2);
       * // => 4000
       */
      var floor = createRound('floor');
  
      /**
       * Computes the maximum value of `array`. If `array` is empty or falsey,
       * `undefined` is returned.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Math
       * @param {Array} array The array to iterate over.
       * @returns {*} Returns the maximum value.
       * @example
       *
       * _.max([4, 2, 8, 6]);
       * // => 8
       *
       * _.max([]);
       * // => undefined
       */
      function max(array) {
        return (array && array.length)
          ? baseExtremum(array, identity, baseGt)
          : undefined;
      }
  
      /**
       * This method is like `_.max` except that it accepts `iteratee` which is
       * invoked for each element in `array` to generate the criterion by which
       * the value is ranked. The iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Math
       * @param {Array} array The array to iterate over.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {*} Returns the maximum value.
       * @example
       *
       * var objects = [{ 'n': 1 }, { 'n': 2 }];
       *
       * _.maxBy(objects, function(o) { return o.n; });
       * // => { 'n': 2 }
       *
       * // The `_.property` iteratee shorthand.
       * _.maxBy(objects, 'n');
       * // => { 'n': 2 }
       */
      function maxBy(array, iteratee) {
        return (array && array.length)
          ? baseExtremum(array, getIteratee(iteratee, 2), baseGt)
          : undefined;
      }
  
      /**
       * Computes the mean of the values in `array`.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Math
       * @param {Array} array The array to iterate over.
       * @returns {number} Returns the mean.
       * @example
       *
       * _.mean([4, 2, 8, 6]);
       * // => 5
       */
      function mean(array) {
        return baseMean(array, identity);
      }
  
      /**
       * This method is like `_.mean` except that it accepts `iteratee` which is
       * invoked for each element in `array` to generate the value to be averaged.
       * The iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.7.0
       * @category Math
       * @param {Array} array The array to iterate over.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {number} Returns the mean.
       * @example
       *
       * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
       *
       * _.meanBy(objects, function(o) { return o.n; });
       * // => 5
       *
       * // The `_.property` iteratee shorthand.
       * _.meanBy(objects, 'n');
       * // => 5
       */
      function meanBy(array, iteratee) {
        return baseMean(array, getIteratee(iteratee, 2));
      }
  
      /**
       * Computes the minimum value of `array`. If `array` is empty or falsey,
       * `undefined` is returned.
       *
       * @static
       * @since 0.1.0
       * @memberOf _
       * @category Math
       * @param {Array} array The array to iterate over.
       * @returns {*} Returns the minimum value.
       * @example
       *
       * _.min([4, 2, 8, 6]);
       * // => 2
       *
       * _.min([]);
       * // => undefined
       */
      function min(array) {
        return (array && array.length)
          ? baseExtremum(array, identity, baseLt)
          : undefined;
      }
  
      /**
       * This method is like `_.min` except that it accepts `iteratee` which is
       * invoked for each element in `array` to generate the criterion by which
       * the value is ranked. The iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Math
       * @param {Array} array The array to iterate over.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {*} Returns the minimum value.
       * @example
       *
       * var objects = [{ 'n': 1 }, { 'n': 2 }];
       *
       * _.minBy(objects, function(o) { return o.n; });
       * // => { 'n': 1 }
       *
       * // The `_.property` iteratee shorthand.
       * _.minBy(objects, 'n');
       * // => { 'n': 1 }
       */
      function minBy(array, iteratee) {
        return (array && array.length)
          ? baseExtremum(array, getIteratee(iteratee, 2), baseLt)
          : undefined;
      }
  
      /**
       * Multiply two numbers.
       *
       * @static
       * @memberOf _
       * @since 4.7.0
       * @category Math
       * @param {number} multiplier The first number in a multiplication.
       * @param {number} multiplicand The second number in a multiplication.
       * @returns {number} Returns the product.
       * @example
       *
       * _.multiply(6, 4);
       * // => 24
       */
      var multiply = createMathOperation(function(multiplier, multiplicand) {
        return multiplier * multiplicand;
      }, 1);
  
      /**
       * Computes `number` rounded to `precision`.
       *
       * @static
       * @memberOf _
       * @since 3.10.0
       * @category Math
       * @param {number} number The number to round.
       * @param {number} [precision=0] The precision to round to.
       * @returns {number} Returns the rounded number.
       * @example
       *
       * _.round(4.006);
       * // => 4
       *
       * _.round(4.006, 2);
       * // => 4.01
       *
       * _.round(4060, -2);
       * // => 4100
       */
      var round = createRound('round');
  
      /**
       * Subtract two numbers.
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Math
       * @param {number} minuend The first number in a subtraction.
       * @param {number} subtrahend The second number in a subtraction.
       * @returns {number} Returns the difference.
       * @example
       *
       * _.subtract(6, 4);
       * // => 2
       */
      var subtract = createMathOperation(function(minuend, subtrahend) {
        return minuend - subtrahend;
      }, 0);
  
      /**
       * Computes the sum of the values in `array`.
       *
       * @static
       * @memberOf _
       * @since 3.4.0
       * @category Math
       * @param {Array} array The array to iterate over.
       * @returns {number} Returns the sum.
       * @example
       *
       * _.sum([4, 2, 8, 6]);
       * // => 20
       */
      function sum(array) {
        return (array && array.length)
          ? baseSum(array, identity)
          : 0;
      }
  
      /**
       * This method is like `_.sum` except that it accepts `iteratee` which is
       * invoked for each element in `array` to generate the value to be summed.
       * The iteratee is invoked with one argument: (value).
       *
       * @static
       * @memberOf _
       * @since 4.0.0
       * @category Math
       * @param {Array} array The array to iterate over.
       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
       * @returns {number} Returns the sum.
       * @example
       *
       * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
       *
       * _.sumBy(objects, function(o) { return o.n; });
       * // => 20
       *
       * // The `_.property` iteratee shorthand.
       * _.sumBy(objects, 'n');
       * // => 20
       */
      function sumBy(array, iteratee) {
        return (array && array.length)
          ? baseSum(array, getIteratee(iteratee, 2))
          : 0;
      }
  
      /*------------------------------------------------------------------------*/
  
      // Add methods that return wrapped values in chain sequences.
      lodash.after = after;
      lodash.ary = ary;
      lodash.assign = assign;
      lodash.assignIn = assignIn;
      lodash.assignInWith = assignInWith;
      lodash.assignWith = assignWith;
      lodash.at = at;
      lodash.before = before;
      lodash.bind = bind;
      lodash.bindAll = bindAll;
      lodash.bindKey = bindKey;
      lodash.castArray = castArray;
      lodash.chain = chain;
      lodash.chunk = chunk;
      lodash.compact = compact;
      lodash.concat = concat;
      lodash.cond = cond;
      lodash.conforms = conforms;
      lodash.constant = constant;
      lodash.countBy = countBy;
      lodash.create = create;
      lodash.curry = curry;
      lodash.curryRight = curryRight;
      lodash.debounce = debounce;
      lodash.defaults = defaults;
      lodash.defaultsDeep = defaultsDeep;
      lodash.defer = defer;
      lodash.delay = delay;
      lodash.difference = difference;
      lodash.differenceBy = differenceBy;
      lodash.differenceWith = differenceWith;
      lodash.drop = drop;
      lodash.dropRight = dropRight;
      lodash.dropRightWhile = dropRightWhile;
      lodash.dropWhile = dropWhile;
      lodash.fill = fill;
      lodash.filter = filter;
      lodash.flatMap = flatMap;
      lodash.flatMapDeep = flatMapDeep;
      lodash.flatMapDepth = flatMapDepth;
      lodash.flatten = flatten;
      lodash.flattenDeep = flattenDeep;
      lodash.flattenDepth = flattenDepth;
      lodash.flip = flip;
      lodash.flow = flow;
      lodash.flowRight = flowRight;
      lodash.fromPairs = fromPairs;
      lodash.functions = functions;
      lodash.functionsIn = functionsIn;
      lodash.groupBy = groupBy;
      lodash.initial = initial;
      lodash.intersection = intersection;
      lodash.intersectionBy = intersectionBy;
      lodash.intersectionWith = intersectionWith;
      lodash.invert = invert;
      lodash.invertBy = invertBy;
      lodash.invokeMap = invokeMap;
      lodash.iteratee = iteratee;
      lodash.keyBy = keyBy;
      lodash.keys = keys;
      lodash.keysIn = keysIn;
      lodash.map = map;
      lodash.mapKeys = mapKeys;
      lodash.mapValues = mapValues;
      lodash.matches = matches;
      lodash.matchesProperty = matchesProperty;
      lodash.memoize = memoize;
      lodash.merge = merge;
      lodash.mergeWith = mergeWith;
      lodash.method = method;
      lodash.methodOf = methodOf;
      lodash.mixin = mixin;
      lodash.negate = negate;
      lodash.nthArg = nthArg;
      lodash.omit = omit;
      lodash.omitBy = omitBy;
      lodash.once = once;
      lodash.orderBy = orderBy;
      lodash.over = over;
      lodash.overArgs = overArgs;
      lodash.overEvery = overEvery;
      lodash.overSome = overSome;
      lodash.partial = partial;
      lodash.partialRight = partialRight;
      lodash.partition = partition;
      lodash.pick = pick;
      lodash.pickBy = pickBy;
      lodash.property = property;
      lodash.propertyOf = propertyOf;
      lodash.pull = pull;
      lodash.pullAll = pullAll;
      lodash.pullAllBy = pullAllBy;
      lodash.pullAllWith = pullAllWith;
      lodash.pullAt = pullAt;
      lodash.range = range;
      lodash.rangeRight = rangeRight;
      lodash.rearg = rearg;
      lodash.reject = reject;
      lodash.remove = remove;
      lodash.rest = rest;
      lodash.reverse = reverse;
      lodash.sampleSize = sampleSize;
      lodash.set = set;
      lodash.setWith = setWith;
      lodash.shuffle = shuffle;
      lodash.slice = slice;
      lodash.sortBy = sortBy;
      lodash.sortedUniq = sortedUniq;
      lodash.sortedUniqBy = sortedUniqBy;
      lodash.split = split;
      lodash.spread = spread;
      lodash.tail = tail;
      lodash.take = take;
      lodash.takeRight = takeRight;
      lodash.takeRightWhile = takeRightWhile;
      lodash.takeWhile = takeWhile;
      lodash.tap = tap;
      lodash.throttle = throttle;
      lodash.thru = thru;
      lodash.toArray = toArray;
      lodash.toPairs = toPairs;
      lodash.toPairsIn = toPairsIn;
      lodash.toPath = toPath;
      lodash.toPlainObject = toPlainObject;
      lodash.transform = transform;
      lodash.unary = unary;
      lodash.union = union;
      lodash.unionBy = unionBy;
      lodash.unionWith = unionWith;
      lodash.uniq = uniq;
      lodash.uniqBy = uniqBy;
      lodash.uniqWith = uniqWith;
      lodash.unset = unset;
      lodash.unzip = unzip;
      lodash.unzipWith = unzipWith;
      lodash.update = update;
      lodash.updateWith = updateWith;
      lodash.values = values;
      lodash.valuesIn = valuesIn;
      lodash.without = without;
      lodash.words = words;
      lodash.wrap = wrap;
      lodash.xor = xor;
      lodash.xorBy = xorBy;
      lodash.xorWith = xorWith;
      lodash.zip = zip;
      lodash.zipObject = zipObject;
      lodash.zipObjectDeep = zipObjectDeep;
      lodash.zipWith = zipWith;
  
      // Add aliases.
      lodash.entries = toPairs;
      lodash.entriesIn = toPairsIn;
      lodash.extend = assignIn;
      lodash.extendWith = assignInWith;
  
      // Add methods to `lodash.prototype`.
      mixin(lodash, lodash);
  
      /*------------------------------------------------------------------------*/
  
      // Add methods that return unwrapped values in chain sequences.
      lodash.add = add;
      lodash.attempt = attempt;
      lodash.camelCase = camelCase;
      lodash.capitalize = capitalize;
      lodash.ceil = ceil;
      lodash.clamp = clamp;
      lodash.clone = clone;
      lodash.cloneDeep = cloneDeep;
      lodash.cloneDeepWith = cloneDeepWith;
      lodash.cloneWith = cloneWith;
      lodash.conformsTo = conformsTo;
      lodash.deburr = deburr;
      lodash.defaultTo = defaultTo;
      lodash.divide = divide;
      lodash.endsWith = endsWith;
      lodash.eq = eq;
      lodash.escape = escape;
      lodash.escapeRegExp = escapeRegExp;
      lodash.every = every;
      lodash.find = find;
      lodash.findIndex = findIndex;
      lodash.findKey = findKey;
      lodash.findLast = findLast;
      lodash.findLastIndex = findLastIndex;
      lodash.findLastKey = findLastKey;
      lodash.floor = floor;
      lodash.forEach = forEach;
      lodash.forEachRight = forEachRight;
      lodash.forIn = forIn;
      lodash.forInRight = forInRight;
      lodash.forOwn = forOwn;
      lodash.forOwnRight = forOwnRight;
      lodash.get = get;
      lodash.gt = gt;
      lodash.gte = gte;
      lodash.has = has;
      lodash.hasIn = hasIn;
      lodash.head = head;
      lodash.identity = identity;
      lodash.includes = includes;
      lodash.indexOf = indexOf;
      lodash.inRange = inRange;
      lodash.invoke = invoke;
      lodash.isArguments = isArguments;
      lodash.isArray = isArray;
      lodash.isArrayBuffer = isArrayBuffer;
      lodash.isArrayLike = isArrayLike;
      lodash.isArrayLikeObject = isArrayLikeObject;
      lodash.isBoolean = isBoolean;
      lodash.isBuffer = isBuffer;
      lodash.isDate = isDate;
      lodash.isElement = isElement;
      lodash.isEmpty = isEmpty;
      lodash.isEqual = isEqual;
      lodash.isEqualWith = isEqualWith;
      lodash.isError = isError;
      lodash.isFinite = isFinite;
      lodash.isFunction = isFunction;
      lodash.isInteger = isInteger;
      lodash.isLength = isLength;
      lodash.isMap = isMap;
      lodash.isMatch = isMatch;
      lodash.isMatchWith = isMatchWith;
      lodash.isNaN = isNaN;
      lodash.isNative = isNative;
      lodash.isNil = isNil;
      lodash.isNull = isNull;
      lodash.isNumber = isNumber;
      lodash.isObject = isObject;
      lodash.isObjectLike = isObjectLike;
      lodash.isPlainObject = isPlainObject;
      lodash.isRegExp = isRegExp;
      lodash.isSafeInteger = isSafeInteger;
      lodash.isSet = isSet;
      lodash.isString = isString;
      lodash.isSymbol = isSymbol;
      lodash.isTypedArray = isTypedArray;
      lodash.isUndefined = isUndefined;
      lodash.isWeakMap = isWeakMap;
      lodash.isWeakSet = isWeakSet;
      lodash.join = join;
      lodash.kebabCase = kebabCase;
      lodash.last = last;
      lodash.lastIndexOf = lastIndexOf;
      lodash.lowerCase = lowerCase;
      lodash.lowerFirst = lowerFirst;
      lodash.lt = lt;
      lodash.lte = lte;
      lodash.max = max;
      lodash.maxBy = maxBy;
      lodash.mean = mean;
      lodash.meanBy = meanBy;
      lodash.min = min;
      lodash.minBy = minBy;
      lodash.stubArray = stubArray;
      lodash.stubFalse = stubFalse;
      lodash.stubObject = stubObject;
      lodash.stubString = stubString;
      lodash.stubTrue = stubTrue;
      lodash.multiply = multiply;
      lodash.nth = nth;
      lodash.noConflict = noConflict;
      lodash.noop = noop;
      lodash.now = now;
      lodash.pad = pad;
      lodash.padEnd = padEnd;
      lodash.padStart = padStart;
      lodash.parseInt = parseInt;
      lodash.random = random;
      lodash.reduce = reduce;
      lodash.reduceRight = reduceRight;
      lodash.repeat = repeat;
      lodash.replace = replace;
      lodash.result = result;
      lodash.round = round;
      lodash.runInContext = runInContext;
      lodash.sample = sample;
      lodash.size = size;
      lodash.snakeCase = snakeCase;
      lodash.some = some;
      lodash.sortedIndex = sortedIndex;
      lodash.sortedIndexBy = sortedIndexBy;
      lodash.sortedIndexOf = sortedIndexOf;
      lodash.sortedLastIndex = sortedLastIndex;
      lodash.sortedLastIndexBy = sortedLastIndexBy;
      lodash.sortedLastIndexOf = sortedLastIndexOf;
      lodash.startCase = startCase;
      lodash.startsWith = startsWith;
      lodash.subtract = subtract;
      lodash.sum = sum;
      lodash.sumBy = sumBy;
      lodash.template = template;
      lodash.times = times;
      lodash.toFinite = toFinite;
      lodash.toInteger = toInteger;
      lodash.toLength = toLength;
      lodash.toLower = toLower;
      lodash.toNumber = toNumber;
      lodash.toSafeInteger = toSafeInteger;
      lodash.toString = toString;
      lodash.toUpper = toUpper;
      lodash.trim = trim;
      lodash.trimEnd = trimEnd;
      lodash.trimStart = trimStart;
      lodash.truncate = truncate;
      lodash.unescape = unescape;
      lodash.uniqueId = uniqueId;
      lodash.upperCase = upperCase;
      lodash.upperFirst = upperFirst;
  
      // Add aliases.
      lodash.each = forEach;
      lodash.eachRight = forEachRight;
      lodash.first = head;
  
      mixin(lodash, (function() {
        var source = {};
        baseForOwn(lodash, function(func, methodName) {
          if (!hasOwnProperty.call(lodash.prototype, methodName)) {
            source[methodName] = func;
          }
        });
        return source;
      }()), { 'chain': false });
  
      /*------------------------------------------------------------------------*/
  
      /**
       * The semantic version number.
       *
       * @static
       * @memberOf _
       * @type {string}
       */
      lodash.VERSION = VERSION;
  
      // Assign default placeholders.
      arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
        lodash[methodName].placeholder = lodash;
      });
  
      // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
      arrayEach(['drop', 'take'], function(methodName, index) {
        LazyWrapper.prototype[methodName] = function(n) {
          n = n === undefined ? 1 : nativeMax(toInteger(n), 0);
  
          var result = (this.__filtered__ && !index)
            ? new LazyWrapper(this)
            : this.clone();
  
          if (result.__filtered__) {
            result.__takeCount__ = nativeMin(n, result.__takeCount__);
          } else {
            result.__views__.push({
              'size': nativeMin(n, MAX_ARRAY_LENGTH),
              'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
            });
          }
          return result;
        };
  
        LazyWrapper.prototype[methodName + 'Right'] = function(n) {
          return this.reverse()[methodName](n).reverse();
        };
      });
  
      // Add `LazyWrapper` methods that accept an `iteratee` value.
      arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
        var type = index + 1,
            isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
  
        LazyWrapper.prototype[methodName] = function(iteratee) {
          var result = this.clone();
          result.__iteratees__.push({
            'iteratee': getIteratee(iteratee, 3),
            'type': type
          });
          result.__filtered__ = result.__filtered__ || isFilter;
          return result;
        };
      });
  
      // Add `LazyWrapper` methods for `_.head` and `_.last`.
      arrayEach(['head', 'last'], function(methodName, index) {
        var takeName = 'take' + (index ? 'Right' : '');
  
        LazyWrapper.prototype[methodName] = function() {
          return this[takeName](1).value()[0];
        };
      });
  
      // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
      arrayEach(['initial', 'tail'], function(methodName, index) {
        var dropName = 'drop' + (index ? '' : 'Right');
  
        LazyWrapper.prototype[methodName] = function() {
          return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
        };
      });
  
      LazyWrapper.prototype.compact = function() {
        return this.filter(identity);
      };
  
      LazyWrapper.prototype.find = function(predicate) {
        return this.filter(predicate).head();
      };
  
      LazyWrapper.prototype.findLast = function(predicate) {
        return this.reverse().find(predicate);
      };
  
      LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
        if (typeof path == 'function') {
          return new LazyWrapper(this);
        }
        return this.map(function(value) {
          return baseInvoke(value, path, args);
        });
      });
  
      LazyWrapper.prototype.reject = function(predicate) {
        return this.filter(negate(getIteratee(predicate)));
      };
  
      LazyWrapper.prototype.slice = function(start, end) {
        start = toInteger(start);
  
        var result = this;
        if (result.__filtered__ && (start > 0 || end < 0)) {
          return new LazyWrapper(result);
        }
        if (start < 0) {
          result = result.takeRight(-start);
        } else if (start) {
          result = result.drop(start);
        }
        if (end !== undefined) {
          end = toInteger(end);
          result = end < 0 ? result.dropRight(-end) : result.take(end - start);
        }
        return result;
      };
  
      LazyWrapper.prototype.takeRightWhile = function(predicate) {
        return this.reverse().takeWhile(predicate).reverse();
      };
  
      LazyWrapper.prototype.toArray = function() {
        return this.take(MAX_ARRAY_LENGTH);
      };
  
      // Add `LazyWrapper` methods to `lodash.prototype`.
      baseForOwn(LazyWrapper.prototype, function(func, methodName) {
        var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
            isTaker = /^(?:head|last)$/.test(methodName),
            lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
            retUnwrapped = isTaker || /^find/.test(methodName);
  
        if (!lodashFunc) {
          return;
        }
        lodash.prototype[methodName] = function() {
          var value = this.__wrapped__,
              args = isTaker ? [1] : arguments,
              isLazy = value instanceof LazyWrapper,
              iteratee = args[0],
              useLazy = isLazy || isArray(value);
  
          var interceptor = function(value) {
            var result = lodashFunc.apply(lodash, arrayPush([value], args));
            return (isTaker && chainAll) ? result[0] : result;
          };
  
          if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
            // Avoid lazy use if the iteratee has a "length" value other than `1`.
            isLazy = useLazy = false;
          }
          var chainAll = this.__chain__,
              isHybrid = !!this.__actions__.length,
              isUnwrapped = retUnwrapped && !chainAll,
              onlyLazy = isLazy && !isHybrid;
  
          if (!retUnwrapped && useLazy) {
            value = onlyLazy ? value : new LazyWrapper(this);
            var result = func.apply(value, args);
            result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
            return new LodashWrapper(result, chainAll);
          }
          if (isUnwrapped && onlyLazy) {
            return func.apply(this, args);
          }
          result = this.thru(interceptor);
          return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
        };
      });
  
      // Add `Array` methods to `lodash.prototype`.
      arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
        var func = arrayProto[methodName],
            chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
            retUnwrapped = /^(?:pop|shift)$/.test(methodName);
  
        lodash.prototype[methodName] = function() {
          var args = arguments;
          if (retUnwrapped && !this.__chain__) {
            var value = this.value();
            return func.apply(isArray(value) ? value : [], args);
          }
          return this[chainName](function(value) {
            return func.apply(isArray(value) ? value : [], args);
          });
        };
      });
  
      // Map minified method names to their real names.
      baseForOwn(LazyWrapper.prototype, function(func, methodName) {
        var lodashFunc = lodash[methodName];
        if (lodashFunc) {
          var key = (lodashFunc.name + ''),
              names = realNames[key] || (realNames[key] = []);
  
          names.push({ 'name': methodName, 'func': lodashFunc });
        }
      });
  
      realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
        'name': 'wrapper',
        'func': undefined
      }];
  
      // Add methods to `LazyWrapper`.
      LazyWrapper.prototype.clone = lazyClone;
      LazyWrapper.prototype.reverse = lazyReverse;
      LazyWrapper.prototype.value = lazyValue;
  
      // Add chain sequence methods to the `lodash` wrapper.
      lodash.prototype.at = wrapperAt;
      lodash.prototype.chain = wrapperChain;
      lodash.prototype.commit = wrapperCommit;
      lodash.prototype.next = wrapperNext;
      lodash.prototype.plant = wrapperPlant;
      lodash.prototype.reverse = wrapperReverse;
      lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
  
      // Add lazy aliases.
      lodash.prototype.first = lodash.prototype.head;
  
      if (symIterator) {
        lodash.prototype[symIterator] = wrapperToIterator;
      }
      return lodash;
    });
  
    /*--------------------------------------------------------------------------*/
  
    // Export lodash.
    var _ = runInContext();
  
    // Some AMD build optimizers, like r.js, check for condition patterns like:
    if (true) {
      // Expose Lodash on the global object to prevent errors when Lodash is
      // loaded by a script tag in the presence of an AMD loader.
      // See http://requirejs.org/docs/errors.html#mismatch for more details.
      // Use `_.noConflict` to remove Lodash from the global object.
      root._ = _;
  
      // Define as an anonymous module so, through path mapping, it can be
      // referenced as the "underscore" module.
      !(__WEBPACK_AMD_DEFINE_RESULT__ = (function() {
        return _;
      }).call(exports, __webpack_require__, exports, module),
  				__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
    }
    // Check for `exports` after `define` in case a build optimizer adds it.
    else {}
  }.call(this));
  
  /* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../webpack/buildin/global.js */ "./node_modules/webpack/buildin/global.js"), __webpack_require__(/*! ./../webpack/buildin/module.js */ "./node_modules/webpack/buildin/module.js")(module)))
  
  /***/ }),
  
  /***/ "./node_modules/popper.js/dist/esm/popper.js":
  /*!***************************************************!*\
    !*** ./node_modules/popper.js/dist/esm/popper.js ***!
    \***************************************************/
  /*! exports provided: default */
  /***/ (function(module, __webpack_exports__, __webpack_require__) {
  
  "use strict";
  __webpack_require__.r(__webpack_exports__);
  /* WEBPACK VAR INJECTION */(function(global) {/**!
   * @fileOverview Kickass library to create and place poppers near their reference elements.
   * @version 1.14.7
   * @license
   * Copyright (c) 2016 Federico Zivolo and contributors
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  var isBrowser = typeof window !== 'undefined' && typeof document !== 'undefined';
  
  var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
  var timeoutDuration = 0;
  for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
    if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
      timeoutDuration = 1;
      break;
    }
  }
  
  function microtaskDebounce(fn) {
    var called = false;
    return function () {
      if (called) {
        return;
      }
      called = true;
      window.Promise.resolve().then(function () {
        called = false;
        fn();
      });
    };
  }
  
  function taskDebounce(fn) {
    var scheduled = false;
    return function () {
      if (!scheduled) {
        scheduled = true;
        setTimeout(function () {
          scheduled = false;
          fn();
        }, timeoutDuration);
      }
    };
  }
  
  var supportsMicroTasks = isBrowser && window.Promise;
  
  /**
  * Create a debounced version of a method, that's asynchronously deferred
  * but called in the minimum time possible.
  *
  * @method
  * @memberof Popper.Utils
  * @argument {Function} fn
  * @returns {Function}
  */
  var debounce = supportsMicroTasks ? microtaskDebounce : taskDebounce;
  
  /**
   * Check if the given variable is a function
   * @method
   * @memberof Popper.Utils
   * @argument {Any} functionToCheck - variable to check
   * @returns {Boolean} answer to: is a function?
   */
  function isFunction(functionToCheck) {
    var getType = {};
    return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
  }
  
  /**
   * Get CSS computed property of the given element
   * @method
   * @memberof Popper.Utils
   * @argument {Eement} element
   * @argument {String} property
   */
  function getStyleComputedProperty(element, property) {
    if (element.nodeType !== 1) {
      return [];
    }
    // NOTE: 1 DOM access here
    var window = element.ownerDocument.defaultView;
    var css = window.getComputedStyle(element, null);
    return property ? css[property] : css;
  }
  
  /**
   * Returns the parentNode or the host of the element
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Element} parent
   */
  function getParentNode(element) {
    if (element.nodeName === 'HTML') {
      return element;
    }
    return element.parentNode || element.host;
  }
  
  /**
   * Returns the scrolling parent of the given element
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Element} scroll parent
   */
  function getScrollParent(element) {
    // Return body, `getScroll` will take care to get the correct `scrollTop` from it
    if (!element) {
      return document.body;
    }
  
    switch (element.nodeName) {
      case 'HTML':
      case 'BODY':
        return element.ownerDocument.body;
      case '#document':
        return element.body;
    }
  
    // Firefox want us to check `-x` and `-y` variations as well
  
    var _getStyleComputedProp = getStyleComputedProperty(element),
        overflow = _getStyleComputedProp.overflow,
        overflowX = _getStyleComputedProp.overflowX,
        overflowY = _getStyleComputedProp.overflowY;
  
    if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) {
      return element;
    }
  
    return getScrollParent(getParentNode(element));
  }
  
  var isIE11 = isBrowser && !!(window.MSInputMethodContext && document.documentMode);
  var isIE10 = isBrowser && /MSIE 10/.test(navigator.userAgent);
  
  /**
   * Determines if the browser is Internet Explorer
   * @method
   * @memberof Popper.Utils
   * @param {Number} version to check
   * @returns {Boolean} isIE
   */
  function isIE(version) {
    if (version === 11) {
      return isIE11;
    }
    if (version === 10) {
      return isIE10;
    }
    return isIE11 || isIE10;
  }
  
  /**
   * Returns the offset parent of the given element
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Element} offset parent
   */
  function getOffsetParent(element) {
    if (!element) {
      return document.documentElement;
    }
  
    var noOffsetParent = isIE(10) ? document.body : null;
  
    // NOTE: 1 DOM access here
    var offsetParent = element.offsetParent || null;
    // Skip hidden elements which don't have an offsetParent
    while (offsetParent === noOffsetParent && element.nextElementSibling) {
      offsetParent = (element = element.nextElementSibling).offsetParent;
    }
  
    var nodeName = offsetParent && offsetParent.nodeName;
  
    if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
      return element ? element.ownerDocument.documentElement : document.documentElement;
    }
  
    // .offsetParent will return the closest TH, TD or TABLE in case
    // no offsetParent is present, I hate this job...
    if (['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 && getStyleComputedProperty(offsetParent, 'position') === 'static') {
      return getOffsetParent(offsetParent);
    }
  
    return offsetParent;
  }
  
  function isOffsetContainer(element) {
    var nodeName = element.nodeName;
  
    if (nodeName === 'BODY') {
      return false;
    }
    return nodeName === 'HTML' || getOffsetParent(element.firstElementChild) === element;
  }
  
  /**
   * Finds the root node (document, shadowDOM root) of the given element
   * @method
   * @memberof Popper.Utils
   * @argument {Element} node
   * @returns {Element} root node
   */
  function getRoot(node) {
    if (node.parentNode !== null) {
      return getRoot(node.parentNode);
    }
  
    return node;
  }
  
  /**
   * Finds the offset parent common to the two provided nodes
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element1
   * @argument {Element} element2
   * @returns {Element} common offset parent
   */
  function findCommonOffsetParent(element1, element2) {
    // This check is needed to avoid errors in case one of the elements isn't defined for any reason
    if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
      return document.documentElement;
    }
  
    // Here we make sure to give as "start" the element that comes first in the DOM
    var order = element1.compareDocumentPosition(element2) & Node.DOCUMENT_POSITION_FOLLOWING;
    var start = order ? element1 : element2;
    var end = order ? element2 : element1;
  
    // Get common ancestor container
    var range = document.createRange();
    range.setStart(start, 0);
    range.setEnd(end, 0);
    var commonAncestorContainer = range.commonAncestorContainer;
  
    // Both nodes are inside #document
  
    if (element1 !== commonAncestorContainer && element2 !== commonAncestorContainer || start.contains(end)) {
      if (isOffsetContainer(commonAncestorContainer)) {
        return commonAncestorContainer;
      }
  
      return getOffsetParent(commonAncestorContainer);
    }
  
    // one of the nodes is inside shadowDOM, find which one
    var element1root = getRoot(element1);
    if (element1root.host) {
      return findCommonOffsetParent(element1root.host, element2);
    } else {
      return findCommonOffsetParent(element1, getRoot(element2).host);
    }
  }
  
  /**
   * Gets the scroll value of the given element in the given side (top and left)
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @argument {String} side `top` or `left`
   * @returns {number} amount of scrolled pixels
   */
  function getScroll(element) {
    var side = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'top';
  
    var upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';
    var nodeName = element.nodeName;
  
    if (nodeName === 'BODY' || nodeName === 'HTML') {
      var html = element.ownerDocument.documentElement;
      var scrollingElement = element.ownerDocument.scrollingElement || html;
      return scrollingElement[upperSide];
    }
  
    return element[upperSide];
  }
  
  /*
   * Sum or subtract the element scroll values (left and top) from a given rect object
   * @method
   * @memberof Popper.Utils
   * @param {Object} rect - Rect object you want to change
   * @param {HTMLElement} element - The element from the function reads the scroll values
   * @param {Boolean} subtract - set to true if you want to subtract the scroll values
   * @return {Object} rect - The modifier rect object
   */
  function includeScroll(rect, element) {
    var subtract = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
  
    var scrollTop = getScroll(element, 'top');
    var scrollLeft = getScroll(element, 'left');
    var modifier = subtract ? -1 : 1;
    rect.top += scrollTop * modifier;
    rect.bottom += scrollTop * modifier;
    rect.left += scrollLeft * modifier;
    rect.right += scrollLeft * modifier;
    return rect;
  }
  
  /*
   * Helper to detect borders of a given element
   * @method
   * @memberof Popper.Utils
   * @param {CSSStyleDeclaration} styles
   * Result of `getStyleComputedProperty` on the given element
   * @param {String} axis - `x` or `y`
   * @return {number} borders - The borders size of the given axis
   */
  
  function getBordersSize(styles, axis) {
    var sideA = axis === 'x' ? 'Left' : 'Top';
    var sideB = sideA === 'Left' ? 'Right' : 'Bottom';
  
    return parseFloat(styles['border' + sideA + 'Width'], 10) + parseFloat(styles['border' + sideB + 'Width'], 10);
  }
  
  function getSize(axis, body, html, computedStyle) {
    return Math.max(body['offset' + axis], body['scroll' + axis], html['client' + axis], html['offset' + axis], html['scroll' + axis], isIE(10) ? parseInt(html['offset' + axis]) + parseInt(computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')]) + parseInt(computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')]) : 0);
  }
  
  function getWindowSizes(document) {
    var body = document.body;
    var html = document.documentElement;
    var computedStyle = isIE(10) && getComputedStyle(html);
  
    return {
      height: getSize('Height', body, html, computedStyle),
      width: getSize('Width', body, html, computedStyle)
    };
  }
  
  var classCallCheck = function (instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  };
  
  var createClass = function () {
    function defineProperties(target, props) {
      for (var i = 0; i < props.length; i++) {
        var descriptor = props[i];
        descriptor.enumerable = descriptor.enumerable || false;
        descriptor.configurable = true;
        if ("value" in descriptor) descriptor.writable = true;
        Object.defineProperty(target, descriptor.key, descriptor);
      }
    }
  
    return function (Constructor, protoProps, staticProps) {
      if (protoProps) defineProperties(Constructor.prototype, protoProps);
      if (staticProps) defineProperties(Constructor, staticProps);
      return Constructor;
    };
  }();
  
  
  
  
  
  var defineProperty = function (obj, key, value) {
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value: value,
        enumerable: true,
        configurable: true,
        writable: true
      });
    } else {
      obj[key] = value;
    }
  
    return obj;
  };
  
  var _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];
  
      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }
  
    return target;
  };
  
  /**
   * Given element offsets, generate an output similar to getBoundingClientRect
   * @method
   * @memberof Popper.Utils
   * @argument {Object} offsets
   * @returns {Object} ClientRect like output
   */
  function getClientRect(offsets) {
    return _extends({}, offsets, {
      right: offsets.left + offsets.width,
      bottom: offsets.top + offsets.height
    });
  }
  
  /**
   * Get bounding client rect of given element
   * @method
   * @memberof Popper.Utils
   * @param {HTMLElement} element
   * @return {Object} client rect
   */
  function getBoundingClientRect(element) {
    var rect = {};
  
    // IE10 10 FIX: Please, don't ask, the element isn't
    // considered in DOM in some circumstances...
    // This isn't reproducible in IE10 compatibility mode of IE11
    try {
      if (isIE(10)) {
        rect = element.getBoundingClientRect();
        var scrollTop = getScroll(element, 'top');
        var scrollLeft = getScroll(element, 'left');
        rect.top += scrollTop;
        rect.left += scrollLeft;
        rect.bottom += scrollTop;
        rect.right += scrollLeft;
      } else {
        rect = element.getBoundingClientRect();
      }
    } catch (e) {}
  
    var result = {
      left: rect.left,
      top: rect.top,
      width: rect.right - rect.left,
      height: rect.bottom - rect.top
    };
  
    // subtract scrollbar size from sizes
    var sizes = element.nodeName === 'HTML' ? getWindowSizes(element.ownerDocument) : {};
    var width = sizes.width || element.clientWidth || result.right - result.left;
    var height = sizes.height || element.clientHeight || result.bottom - result.top;
  
    var horizScrollbar = element.offsetWidth - width;
    var vertScrollbar = element.offsetHeight - height;
  
    // if an hypothetical scrollbar is detected, we must be sure it's not a `border`
    // we make this check conditional for performance reasons
    if (horizScrollbar || vertScrollbar) {
      var styles = getStyleComputedProperty(element);
      horizScrollbar -= getBordersSize(styles, 'x');
      vertScrollbar -= getBordersSize(styles, 'y');
  
      result.width -= horizScrollbar;
      result.height -= vertScrollbar;
    }
  
    return getClientRect(result);
  }
  
  function getOffsetRectRelativeToArbitraryNode(children, parent) {
    var fixedPosition = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
  
    var isIE10 = isIE(10);
    var isHTML = parent.nodeName === 'HTML';
    var childrenRect = getBoundingClientRect(children);
    var parentRect = getBoundingClientRect(parent);
    var scrollParent = getScrollParent(children);
  
    var styles = getStyleComputedProperty(parent);
    var borderTopWidth = parseFloat(styles.borderTopWidth, 10);
    var borderLeftWidth = parseFloat(styles.borderLeftWidth, 10);
  
    // In cases where the parent is fixed, we must ignore negative scroll in offset calc
    if (fixedPosition && isHTML) {
      parentRect.top = Math.max(parentRect.top, 0);
      parentRect.left = Math.max(parentRect.left, 0);
    }
    var offsets = getClientRect({
      top: childrenRect.top - parentRect.top - borderTopWidth,
      left: childrenRect.left - parentRect.left - borderLeftWidth,
      width: childrenRect.width,
      height: childrenRect.height
    });
    offsets.marginTop = 0;
    offsets.marginLeft = 0;
  
    // Subtract margins of documentElement in case it's being used as parent
    // we do this only on HTML because it's the only element that behaves
    // differently when margins are applied to it. The margins are included in
    // the box of the documentElement, in the other cases not.
    if (!isIE10 && isHTML) {
      var marginTop = parseFloat(styles.marginTop, 10);
      var marginLeft = parseFloat(styles.marginLeft, 10);
  
      offsets.top -= borderTopWidth - marginTop;
      offsets.bottom -= borderTopWidth - marginTop;
      offsets.left -= borderLeftWidth - marginLeft;
      offsets.right -= borderLeftWidth - marginLeft;
  
      // Attach marginTop and marginLeft because in some circumstances we may need them
      offsets.marginTop = marginTop;
      offsets.marginLeft = marginLeft;
    }
  
    if (isIE10 && !fixedPosition ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
      offsets = includeScroll(offsets, parent);
    }
  
    return offsets;
  }
  
  function getViewportOffsetRectRelativeToArtbitraryNode(element) {
    var excludeScroll = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
  
    var html = element.ownerDocument.documentElement;
    var relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);
    var width = Math.max(html.clientWidth, window.innerWidth || 0);
    var height = Math.max(html.clientHeight, window.innerHeight || 0);
  
    var scrollTop = !excludeScroll ? getScroll(html) : 0;
    var scrollLeft = !excludeScroll ? getScroll(html, 'left') : 0;
  
    var offset = {
      top: scrollTop - relativeOffset.top + relativeOffset.marginTop,
      left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,
      width: width,
      height: height
    };
  
    return getClientRect(offset);
  }
  
  /**
   * Check if the given element is fixed or is inside a fixed parent
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @argument {Element} customContainer
   * @returns {Boolean} answer to "isFixed?"
   */
  function isFixed(element) {
    var nodeName = element.nodeName;
    if (nodeName === 'BODY' || nodeName === 'HTML') {
      return false;
    }
    if (getStyleComputedProperty(element, 'position') === 'fixed') {
      return true;
    }
    var parentNode = getParentNode(element);
    if (!parentNode) {
      return false;
    }
    return isFixed(parentNode);
  }
  
  /**
   * Finds the first parent of an element that has a transformed property defined
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Element} first transformed parent or documentElement
   */
  
  function getFixedPositionOffsetParent(element) {
    // This check is needed to avoid errors in case one of the elements isn't defined for any reason
    if (!element || !element.parentElement || isIE()) {
      return document.documentElement;
    }
    var el = element.parentElement;
    while (el && getStyleComputedProperty(el, 'transform') === 'none') {
      el = el.parentElement;
    }
    return el || document.documentElement;
  }
  
  /**
   * Computed the boundaries limits and return them
   * @method
   * @memberof Popper.Utils
   * @param {HTMLElement} popper
   * @param {HTMLElement} reference
   * @param {number} padding
   * @param {HTMLElement} boundariesElement - Element used to define the boundaries
   * @param {Boolean} fixedPosition - Is in fixed position mode
   * @returns {Object} Coordinates of the boundaries
   */
  function getBoundaries(popper, reference, padding, boundariesElement) {
    var fixedPosition = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
  
    // NOTE: 1 DOM access here
  
    var boundaries = { top: 0, left: 0 };
    var offsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, reference);
  
    // Handle viewport case
    if (boundariesElement === 'viewport') {
      boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent, fixedPosition);
    } else {
      // Handle other cases based on DOM element used as boundaries
      var boundariesNode = void 0;
      if (boundariesElement === 'scrollParent') {
        boundariesNode = getScrollParent(getParentNode(reference));
        if (boundariesNode.nodeName === 'BODY') {
          boundariesNode = popper.ownerDocument.documentElement;
        }
      } else if (boundariesElement === 'window') {
        boundariesNode = popper.ownerDocument.documentElement;
      } else {
        boundariesNode = boundariesElement;
      }
  
      var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent, fixedPosition);
  
      // In case of HTML, we need a different computation
      if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
        var _getWindowSizes = getWindowSizes(popper.ownerDocument),
            height = _getWindowSizes.height,
            width = _getWindowSizes.width;
  
        boundaries.top += offsets.top - offsets.marginTop;
        boundaries.bottom = height + offsets.top;
        boundaries.left += offsets.left - offsets.marginLeft;
        boundaries.right = width + offsets.left;
      } else {
        // for all the other DOM elements, this one is good
        boundaries = offsets;
      }
    }
  
    // Add paddings
    padding = padding || 0;
    var isPaddingNumber = typeof padding === 'number';
    boundaries.left += isPaddingNumber ? padding : padding.left || 0;
    boundaries.top += isPaddingNumber ? padding : padding.top || 0;
    boundaries.right -= isPaddingNumber ? padding : padding.right || 0;
    boundaries.bottom -= isPaddingNumber ? padding : padding.bottom || 0;
  
    return boundaries;
  }
  
  function getArea(_ref) {
    var width = _ref.width,
        height = _ref.height;
  
    return width * height;
  }
  
  /**
   * Utility used to transform the `auto` placement to the placement with more
   * available space.
   * @method
   * @memberof Popper.Utils
   * @argument {Object} data - The data object generated by update method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function computeAutoPlacement(placement, refRect, popper, reference, boundariesElement) {
    var padding = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 0;
  
    if (placement.indexOf('auto') === -1) {
      return placement;
    }
  
    var boundaries = getBoundaries(popper, reference, padding, boundariesElement);
  
    var rects = {
      top: {
        width: boundaries.width,
        height: refRect.top - boundaries.top
      },
      right: {
        width: boundaries.right - refRect.right,
        height: boundaries.height
      },
      bottom: {
        width: boundaries.width,
        height: boundaries.bottom - refRect.bottom
      },
      left: {
        width: refRect.left - boundaries.left,
        height: boundaries.height
      }
    };
  
    var sortedAreas = Object.keys(rects).map(function (key) {
      return _extends({
        key: key
      }, rects[key], {
        area: getArea(rects[key])
      });
    }).sort(function (a, b) {
      return b.area - a.area;
    });
  
    var filteredAreas = sortedAreas.filter(function (_ref2) {
      var width = _ref2.width,
          height = _ref2.height;
      return width >= popper.clientWidth && height >= popper.clientHeight;
    });
  
    var computedPlacement = filteredAreas.length > 0 ? filteredAreas[0].key : sortedAreas[0].key;
  
    var variation = placement.split('-')[1];
  
    return computedPlacement + (variation ? '-' + variation : '');
  }
  
  /**
   * Get offsets to the reference element
   * @method
   * @memberof Popper.Utils
   * @param {Object} state
   * @param {Element} popper - the popper element
   * @param {Element} reference - the reference element (the popper will be relative to this)
   * @param {Element} fixedPosition - is in fixed position mode
   * @returns {Object} An object containing the offsets which will be applied to the popper
   */
  function getReferenceOffsets(state, popper, reference) {
    var fixedPosition = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
  
    var commonOffsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, reference);
    return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent, fixedPosition);
  }
  
  /**
   * Get the outer sizes of the given element (offset size + margins)
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Object} object containing width and height properties
   */
  function getOuterSizes(element) {
    var window = element.ownerDocument.defaultView;
    var styles = window.getComputedStyle(element);
    var x = parseFloat(styles.marginTop || 0) + parseFloat(styles.marginBottom || 0);
    var y = parseFloat(styles.marginLeft || 0) + parseFloat(styles.marginRight || 0);
    var result = {
      width: element.offsetWidth + y,
      height: element.offsetHeight + x
    };
    return result;
  }
  
  /**
   * Get the opposite placement of the given one
   * @method
   * @memberof Popper.Utils
   * @argument {String} placement
   * @returns {String} flipped placement
   */
  function getOppositePlacement(placement) {
    var hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };
    return placement.replace(/left|right|bottom|top/g, function (matched) {
      return hash[matched];
    });
  }
  
  /**
   * Get offsets to the popper
   * @method
   * @memberof Popper.Utils
   * @param {Object} position - CSS position the Popper will get applied
   * @param {HTMLElement} popper - the popper element
   * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)
   * @param {String} placement - one of the valid placement options
   * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper
   */
  function getPopperOffsets(popper, referenceOffsets, placement) {
    placement = placement.split('-')[0];
  
    // Get popper node sizes
    var popperRect = getOuterSizes(popper);
  
    // Add position, width and height to our offsets object
    var popperOffsets = {
      width: popperRect.width,
      height: popperRect.height
    };
  
    // depending by the popper placement we have to compute its offsets slightly differently
    var isHoriz = ['right', 'left'].indexOf(placement) !== -1;
    var mainSide = isHoriz ? 'top' : 'left';
    var secondarySide = isHoriz ? 'left' : 'top';
    var measurement = isHoriz ? 'height' : 'width';
    var secondaryMeasurement = !isHoriz ? 'height' : 'width';
  
    popperOffsets[mainSide] = referenceOffsets[mainSide] + referenceOffsets[measurement] / 2 - popperRect[measurement] / 2;
    if (placement === secondarySide) {
      popperOffsets[secondarySide] = referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];
    } else {
      popperOffsets[secondarySide] = referenceOffsets[getOppositePlacement(secondarySide)];
    }
  
    return popperOffsets;
  }
  
  /**
   * Mimics the `find` method of Array
   * @method
   * @memberof Popper.Utils
   * @argument {Array} arr
   * @argument prop
   * @argument value
   * @returns index or -1
   */
  function find(arr, check) {
    // use native find if supported
    if (Array.prototype.find) {
      return arr.find(check);
    }
  
    // use `filter` to obtain the same behavior of `find`
    return arr.filter(check)[0];
  }
  
  /**
   * Return the index of the matching object
   * @method
   * @memberof Popper.Utils
   * @argument {Array} arr
   * @argument prop
   * @argument value
   * @returns index or -1
   */
  function findIndex(arr, prop, value) {
    // use native findIndex if supported
    if (Array.prototype.findIndex) {
      return arr.findIndex(function (cur) {
        return cur[prop] === value;
      });
    }
  
    // use `find` + `indexOf` if `findIndex` isn't supported
    var match = find(arr, function (obj) {
      return obj[prop] === value;
    });
    return arr.indexOf(match);
  }
  
  /**
   * Loop trough the list of modifiers and run them in order,
   * each of them will then edit the data object.
   * @method
   * @memberof Popper.Utils
   * @param {dataObject} data
   * @param {Array} modifiers
   * @param {String} ends - Optional modifier name used as stopper
   * @returns {dataObject}
   */
  function runModifiers(modifiers, data, ends) {
    var modifiersToRun = ends === undefined ? modifiers : modifiers.slice(0, findIndex(modifiers, 'name', ends));
  
    modifiersToRun.forEach(function (modifier) {
      if (modifier['function']) {
        // eslint-disable-line dot-notation
        console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
      }
      var fn = modifier['function'] || modifier.fn; // eslint-disable-line dot-notation
      if (modifier.enabled && isFunction(fn)) {
        // Add properties to offsets to make them a complete clientRect object
        // we do this before each modifier to make sure the previous one doesn't
        // mess with these values
        data.offsets.popper = getClientRect(data.offsets.popper);
        data.offsets.reference = getClientRect(data.offsets.reference);
  
        data = fn(data, modifier);
      }
    });
  
    return data;
  }
  
  /**
   * Updates the position of the popper, computing the new offsets and applying
   * the new style.<br />
   * Prefer `scheduleUpdate` over `update` because of performance reasons.
   * @method
   * @memberof Popper
   */
  function update() {
    // if popper is destroyed, don't perform any further update
    if (this.state.isDestroyed) {
      return;
    }
  
    var data = {
      instance: this,
      styles: {},
      arrowStyles: {},
      attributes: {},
      flipped: false,
      offsets: {}
    };
  
    // compute reference element offsets
    data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference, this.options.positionFixed);
  
    // compute auto placement, store placement inside the data object,
    // modifiers will be able to edit `placement` if needed
    // and refer to originalPlacement to know the original value
    data.placement = computeAutoPlacement(this.options.placement, data.offsets.reference, this.popper, this.reference, this.options.modifiers.flip.boundariesElement, this.options.modifiers.flip.padding);
  
    // store the computed placement inside `originalPlacement`
    data.originalPlacement = data.placement;
  
    data.positionFixed = this.options.positionFixed;
  
    // compute the popper offsets
    data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement);
  
    data.offsets.popper.position = this.options.positionFixed ? 'fixed' : 'absolute';
  
    // run the modifiers
    data = runModifiers(this.modifiers, data);
  
    // the first `update` will call `onCreate` callback
    // the other ones will call `onUpdate` callback
    if (!this.state.isCreated) {
      this.state.isCreated = true;
      this.options.onCreate(data);
    } else {
      this.options.onUpdate(data);
    }
  }
  
  /**
   * Helper used to know if the given modifier is enabled.
   * @method
   * @memberof Popper.Utils
   * @returns {Boolean}
   */
  function isModifierEnabled(modifiers, modifierName) {
    return modifiers.some(function (_ref) {
      var name = _ref.name,
          enabled = _ref.enabled;
      return enabled && name === modifierName;
    });
  }
  
  /**
   * Get the prefixed supported property name
   * @method
   * @memberof Popper.Utils
   * @argument {String} property (camelCase)
   * @returns {String} prefixed property (camelCase or PascalCase, depending on the vendor prefix)
   */
  function getSupportedPropertyName(property) {
    var prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];
    var upperProp = property.charAt(0).toUpperCase() + property.slice(1);
  
    for (var i = 0; i < prefixes.length; i++) {
      var prefix = prefixes[i];
      var toCheck = prefix ? '' + prefix + upperProp : property;
      if (typeof document.body.style[toCheck] !== 'undefined') {
        return toCheck;
      }
    }
    return null;
  }
  
  /**
   * Destroys the popper.
   * @method
   * @memberof Popper
   */
  function destroy() {
    this.state.isDestroyed = true;
  
    // touch DOM only if `applyStyle` modifier is enabled
    if (isModifierEnabled(this.modifiers, 'applyStyle')) {
      this.popper.removeAttribute('x-placement');
      this.popper.style.position = '';
      this.popper.style.top = '';
      this.popper.style.left = '';
      this.popper.style.right = '';
      this.popper.style.bottom = '';
      this.popper.style.willChange = '';
      this.popper.style[getSupportedPropertyName('transform')] = '';
    }
  
    this.disableEventListeners();
  
    // remove the popper if user explicity asked for the deletion on destroy
    // do not use `remove` because IE11 doesn't support it
    if (this.options.removeOnDestroy) {
      this.popper.parentNode.removeChild(this.popper);
    }
    return this;
  }
  
  /**
   * Get the window associated with the element
   * @argument {Element} element
   * @returns {Window}
   */
  function getWindow(element) {
    var ownerDocument = element.ownerDocument;
    return ownerDocument ? ownerDocument.defaultView : window;
  }
  
  function attachToScrollParents(scrollParent, event, callback, scrollParents) {
    var isBody = scrollParent.nodeName === 'BODY';
    var target = isBody ? scrollParent.ownerDocument.defaultView : scrollParent;
    target.addEventListener(event, callback, { passive: true });
  
    if (!isBody) {
      attachToScrollParents(getScrollParent(target.parentNode), event, callback, scrollParents);
    }
    scrollParents.push(target);
  }
  
  /**
   * Setup needed event listeners used to update the popper position
   * @method
   * @memberof Popper.Utils
   * @private
   */
  function setupEventListeners(reference, options, state, updateBound) {
    // Resize event listener on window
    state.updateBound = updateBound;
    getWindow(reference).addEventListener('resize', state.updateBound, { passive: true });
  
    // Scroll event listener on scroll parents
    var scrollElement = getScrollParent(reference);
    attachToScrollParents(scrollElement, 'scroll', state.updateBound, state.scrollParents);
    state.scrollElement = scrollElement;
    state.eventsEnabled = true;
  
    return state;
  }
  
  /**
   * It will add resize/scroll events and start recalculating
   * position of the popper element when they are triggered.
   * @method
   * @memberof Popper
   */
  function enableEventListeners() {
    if (!this.state.eventsEnabled) {
      this.state = setupEventListeners(this.reference, this.options, this.state, this.scheduleUpdate);
    }
  }
  
  /**
   * Remove event listeners used to update the popper position
   * @method
   * @memberof Popper.Utils
   * @private
   */
  function removeEventListeners(reference, state) {
    // Remove resize event listener on window
    getWindow(reference).removeEventListener('resize', state.updateBound);
  
    // Remove scroll event listener on scroll parents
    state.scrollParents.forEach(function (target) {
      target.removeEventListener('scroll', state.updateBound);
    });
  
    // Reset state
    state.updateBound = null;
    state.scrollParents = [];
    state.scrollElement = null;
    state.eventsEnabled = false;
    return state;
  }
  
  /**
   * It will remove resize/scroll events and won't recalculate popper position
   * when they are triggered. It also won't trigger `onUpdate` callback anymore,
   * unless you call `update` method manually.
   * @method
   * @memberof Popper
   */
  function disableEventListeners() {
    if (this.state.eventsEnabled) {
      cancelAnimationFrame(this.scheduleUpdate);
      this.state = removeEventListeners(this.reference, this.state);
    }
  }
  
  /**
   * Tells if a given input is a number
   * @method
   * @memberof Popper.Utils
   * @param {*} input to check
   * @return {Boolean}
   */
  function isNumeric(n) {
    return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);
  }
  
  /**
   * Set the style to the given popper
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element - Element to apply the style to
   * @argument {Object} styles
   * Object with a list of properties and values which will be applied to the element
   */
  function setStyles(element, styles) {
    Object.keys(styles).forEach(function (prop) {
      var unit = '';
      // add unit if the value is numeric and is one of the following
      if (['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !== -1 && isNumeric(styles[prop])) {
        unit = 'px';
      }
      element.style[prop] = styles[prop] + unit;
    });
  }
  
  /**
   * Set the attributes to the given popper
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element - Element to apply the attributes to
   * @argument {Object} styles
   * Object with a list of properties and values which will be applied to the element
   */
  function setAttributes(element, attributes) {
    Object.keys(attributes).forEach(function (prop) {
      var value = attributes[prop];
      if (value !== false) {
        element.setAttribute(prop, attributes[prop]);
      } else {
        element.removeAttribute(prop);
      }
    });
  }
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by `update` method
   * @argument {Object} data.styles - List of style properties - values to apply to popper element
   * @argument {Object} data.attributes - List of attribute properties - values to apply to popper element
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The same data object
   */
  function applyStyle(data) {
    // any property present in `data.styles` will be applied to the popper,
    // in this way we can make the 3rd party modifiers add custom styles to it
    // Be aware, modifiers could override the properties defined in the previous
    // lines of this modifier!
    setStyles(data.instance.popper, data.styles);
  
    // any property present in `data.attributes` will be applied to the popper,
    // they will be set as HTML attributes of the element
    setAttributes(data.instance.popper, data.attributes);
  
    // if arrowElement is defined and arrowStyles has some properties
    if (data.arrowElement && Object.keys(data.arrowStyles).length) {
      setStyles(data.arrowElement, data.arrowStyles);
    }
  
    return data;
  }
  
  /**
   * Set the x-placement attribute before everything else because it could be used
   * to add margins to the popper margins needs to be calculated to get the
   * correct popper offsets.
   * @method
   * @memberof Popper.modifiers
   * @param {HTMLElement} reference - The reference element used to position the popper
   * @param {HTMLElement} popper - The HTML element used as popper
   * @param {Object} options - Popper.js options
   */
  function applyStyleOnLoad(reference, popper, options, modifierOptions, state) {
    // compute reference element offsets
    var referenceOffsets = getReferenceOffsets(state, popper, reference, options.positionFixed);
  
    // compute auto placement, store placement inside the data object,
    // modifiers will be able to edit `placement` if needed
    // and refer to originalPlacement to know the original value
    var placement = computeAutoPlacement(options.placement, referenceOffsets, popper, reference, options.modifiers.flip.boundariesElement, options.modifiers.flip.padding);
  
    popper.setAttribute('x-placement', placement);
  
    // Apply `position` to popper before anything else because
    // without the position applied we can't guarantee correct computations
    setStyles(popper, { position: options.positionFixed ? 'fixed' : 'absolute' });
  
    return options;
  }
  
  /**
   * @function
   * @memberof Popper.Utils
   * @argument {Object} data - The data object generated by `update` method
   * @argument {Boolean} shouldRound - If the offsets should be rounded at all
   * @returns {Object} The popper's position offsets rounded
   *
   * The tale of pixel-perfect positioning. It's still not 100% perfect, but as
   * good as it can be within reason.
   * Discussion here: https://github.com/FezVrasta/popper.js/pull/715
   *
   * Low DPI screens cause a popper to be blurry if not using full pixels (Safari
   * as well on High DPI screens).
   *
   * Firefox prefers no rounding for positioning and does not have blurriness on
   * high DPI screens.
   *
   * Only horizontal placement and left/right values need to be considered.
   */
  function getRoundedOffsets(data, shouldRound) {
    var _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        reference = _data$offsets.reference;
    var round = Math.round,
        floor = Math.floor;
  
    var noRound = function noRound(v) {
      return v;
    };
  
    var referenceWidth = round(reference.width);
    var popperWidth = round(popper.width);
  
    var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
    var isVariation = data.placement.indexOf('-') !== -1;
    var sameWidthParity = referenceWidth % 2 === popperWidth % 2;
    var bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;
  
    var horizontalToInteger = !shouldRound ? noRound : isVertical || isVariation || sameWidthParity ? round : floor;
    var verticalToInteger = !shouldRound ? noRound : round;
  
    return {
      left: horizontalToInteger(bothOddWidth && !isVariation && shouldRound ? popper.left - 1 : popper.left),
      top: verticalToInteger(popper.top),
      bottom: verticalToInteger(popper.bottom),
      right: horizontalToInteger(popper.right)
    };
  }
  
  var isFirefox = isBrowser && /Firefox/i.test(navigator.userAgent);
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by `update` method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function computeStyle(data, options) {
    var x = options.x,
        y = options.y;
    var popper = data.offsets.popper;
  
    // Remove this legacy support in Popper.js v2
  
    var legacyGpuAccelerationOption = find(data.instance.modifiers, function (modifier) {
      return modifier.name === 'applyStyle';
    }).gpuAcceleration;
    if (legacyGpuAccelerationOption !== undefined) {
      console.warn('WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!');
    }
    var gpuAcceleration = legacyGpuAccelerationOption !== undefined ? legacyGpuAccelerationOption : options.gpuAcceleration;
  
    var offsetParent = getOffsetParent(data.instance.popper);
    var offsetParentRect = getBoundingClientRect(offsetParent);
  
    // Styles
    var styles = {
      position: popper.position
    };
  
    var offsets = getRoundedOffsets(data, window.devicePixelRatio < 2 || !isFirefox);
  
    var sideA = x === 'bottom' ? 'top' : 'bottom';
    var sideB = y === 'right' ? 'left' : 'right';
  
    // if gpuAcceleration is set to `true` and transform is supported,
    //  we use `translate3d` to apply the position to the popper we
    // automatically use the supported prefixed version if needed
    var prefixedProperty = getSupportedPropertyName('transform');
  
    // now, let's make a step back and look at this code closely (wtf?)
    // If the content of the popper grows once it's been positioned, it
    // may happen that the popper gets misplaced because of the new content
    // overflowing its reference element
    // To avoid this problem, we provide two options (x and y), which allow
    // the consumer to define the offset origin.
    // If we position a popper on top of a reference element, we can set
    // `x` to `top` to make the popper grow towards its top instead of
    // its bottom.
    var left = void 0,
        top = void 0;
    if (sideA === 'bottom') {
      // when offsetParent is <html> the positioning is relative to the bottom of the screen (excluding the scrollbar)
      // and not the bottom of the html element
      if (offsetParent.nodeName === 'HTML') {
        top = -offsetParent.clientHeight + offsets.bottom;
      } else {
        top = -offsetParentRect.height + offsets.bottom;
      }
    } else {
      top = offsets.top;
    }
    if (sideB === 'right') {
      if (offsetParent.nodeName === 'HTML') {
        left = -offsetParent.clientWidth + offsets.right;
      } else {
        left = -offsetParentRect.width + offsets.right;
      }
    } else {
      left = offsets.left;
    }
    if (gpuAcceleration && prefixedProperty) {
      styles[prefixedProperty] = 'translate3d(' + left + 'px, ' + top + 'px, 0)';
      styles[sideA] = 0;
      styles[sideB] = 0;
      styles.willChange = 'transform';
    } else {
      // othwerise, we use the standard `top`, `left`, `bottom` and `right` properties
      var invertTop = sideA === 'bottom' ? -1 : 1;
      var invertLeft = sideB === 'right' ? -1 : 1;
      styles[sideA] = top * invertTop;
      styles[sideB] = left * invertLeft;
      styles.willChange = sideA + ', ' + sideB;
    }
  
    // Attributes
    var attributes = {
      'x-placement': data.placement
    };
  
    // Update `data` attributes, styles and arrowStyles
    data.attributes = _extends({}, attributes, data.attributes);
    data.styles = _extends({}, styles, data.styles);
    data.arrowStyles = _extends({}, data.offsets.arrow, data.arrowStyles);
  
    return data;
  }
  
  /**
   * Helper used to know if the given modifier depends from another one.<br />
   * It checks if the needed modifier is listed and enabled.
   * @method
   * @memberof Popper.Utils
   * @param {Array} modifiers - list of modifiers
   * @param {String} requestingName - name of requesting modifier
   * @param {String} requestedName - name of requested modifier
   * @returns {Boolean}
   */
  function isModifierRequired(modifiers, requestingName, requestedName) {
    var requesting = find(modifiers, function (_ref) {
      var name = _ref.name;
      return name === requestingName;
    });
  
    var isRequired = !!requesting && modifiers.some(function (modifier) {
      return modifier.name === requestedName && modifier.enabled && modifier.order < requesting.order;
    });
  
    if (!isRequired) {
      var _requesting = '`' + requestingName + '`';
      var requested = '`' + requestedName + '`';
      console.warn(requested + ' modifier is required by ' + _requesting + ' modifier in order to work, be sure to include it before ' + _requesting + '!');
    }
    return isRequired;
  }
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by update method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function arrow(data, options) {
    var _data$offsets$arrow;
  
    // arrow depends on keepTogether in order to work
    if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {
      return data;
    }
  
    var arrowElement = options.element;
  
    // if arrowElement is a string, suppose it's a CSS selector
    if (typeof arrowElement === 'string') {
      arrowElement = data.instance.popper.querySelector(arrowElement);
  
      // if arrowElement is not found, don't run the modifier
      if (!arrowElement) {
        return data;
      }
    } else {
      // if the arrowElement isn't a query selector we must check that the
      // provided DOM node is child of its popper node
      if (!data.instance.popper.contains(arrowElement)) {
        console.warn('WARNING: `arrow.element` must be child of its popper element!');
        return data;
      }
    }
  
    var placement = data.placement.split('-')[0];
    var _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        reference = _data$offsets.reference;
  
    var isVertical = ['left', 'right'].indexOf(placement) !== -1;
  
    var len = isVertical ? 'height' : 'width';
    var sideCapitalized = isVertical ? 'Top' : 'Left';
    var side = sideCapitalized.toLowerCase();
    var altSide = isVertical ? 'left' : 'top';
    var opSide = isVertical ? 'bottom' : 'right';
    var arrowElementSize = getOuterSizes(arrowElement)[len];
  
    //
    // extends keepTogether behavior making sure the popper and its
    // reference have enough pixels in conjunction
    //
  
    // top/left side
    if (reference[opSide] - arrowElementSize < popper[side]) {
      data.offsets.popper[side] -= popper[side] - (reference[opSide] - arrowElementSize);
    }
    // bottom/right side
    if (reference[side] + arrowElementSize > popper[opSide]) {
      data.offsets.popper[side] += reference[side] + arrowElementSize - popper[opSide];
    }
    data.offsets.popper = getClientRect(data.offsets.popper);
  
    // compute center of the popper
    var center = reference[side] + reference[len] / 2 - arrowElementSize / 2;
  
    // Compute the sideValue using the updated popper offsets
    // take popper margin in account because we don't have this info available
    var css = getStyleComputedProperty(data.instance.popper);
    var popperMarginSide = parseFloat(css['margin' + sideCapitalized], 10);
    var popperBorderSide = parseFloat(css['border' + sideCapitalized + 'Width'], 10);
    var sideValue = center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;
  
    // prevent arrowElement from being placed not contiguously to its popper
    sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);
  
    data.arrowElement = arrowElement;
    data.offsets.arrow = (_data$offsets$arrow = {}, defineProperty(_data$offsets$arrow, side, Math.round(sideValue)), defineProperty(_data$offsets$arrow, altSide, ''), _data$offsets$arrow);
  
    return data;
  }
  
  /**
   * Get the opposite placement variation of the given one
   * @method
   * @memberof Popper.Utils
   * @argument {String} placement variation
   * @returns {String} flipped placement variation
   */
  function getOppositeVariation(variation) {
    if (variation === 'end') {
      return 'start';
    } else if (variation === 'start') {
      return 'end';
    }
    return variation;
  }
  
  /**
   * List of accepted placements to use as values of the `placement` option.<br />
   * Valid placements are:
   * - `auto`
   * - `top`
   * - `right`
   * - `bottom`
   * - `left`
   *
   * Each placement can have a variation from this list:
   * - `-start`
   * - `-end`
   *
   * Variations are interpreted easily if you think of them as the left to right
   * written languages. Horizontally (`top` and `bottom`), `start` is left and `end`
   * is right.<br />
   * Vertically (`left` and `right`), `start` is top and `end` is bottom.
   *
   * Some valid examples are:
   * - `top-end` (on top of reference, right aligned)
   * - `right-start` (on right of reference, top aligned)
   * - `bottom` (on bottom, centered)
   * - `auto-end` (on the side with more space available, alignment depends by placement)
   *
   * @static
   * @type {Array}
   * @enum {String}
   * @readonly
   * @method placements
   * @memberof Popper
   */
  var placements = ['auto-start', 'auto', 'auto-end', 'top-start', 'top', 'top-end', 'right-start', 'right', 'right-end', 'bottom-end', 'bottom', 'bottom-start', 'left-end', 'left', 'left-start'];
  
  // Get rid of `auto` `auto-start` and `auto-end`
  var validPlacements = placements.slice(3);
  
  /**
   * Given an initial placement, returns all the subsequent placements
   * clockwise (or counter-clockwise).
   *
   * @method
   * @memberof Popper.Utils
   * @argument {String} placement - A valid placement (it accepts variations)
   * @argument {Boolean} counter - Set to true to walk the placements counterclockwise
   * @returns {Array} placements including their variations
   */
  function clockwise(placement) {
    var counter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
  
    var index = validPlacements.indexOf(placement);
    var arr = validPlacements.slice(index + 1).concat(validPlacements.slice(0, index));
    return counter ? arr.reverse() : arr;
  }
  
  var BEHAVIORS = {
    FLIP: 'flip',
    CLOCKWISE: 'clockwise',
    COUNTERCLOCKWISE: 'counterclockwise'
  };
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by update method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function flip(data, options) {
    // if `inner` modifier is enabled, we can't use the `flip` modifier
    if (isModifierEnabled(data.instance.modifiers, 'inner')) {
      return data;
    }
  
    if (data.flipped && data.placement === data.originalPlacement) {
      // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides
      return data;
    }
  
    var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, options.boundariesElement, data.positionFixed);
  
    var placement = data.placement.split('-')[0];
    var placementOpposite = getOppositePlacement(placement);
    var variation = data.placement.split('-')[1] || '';
  
    var flipOrder = [];
  
    switch (options.behavior) {
      case BEHAVIORS.FLIP:
        flipOrder = [placement, placementOpposite];
        break;
      case BEHAVIORS.CLOCKWISE:
        flipOrder = clockwise(placement);
        break;
      case BEHAVIORS.COUNTERCLOCKWISE:
        flipOrder = clockwise(placement, true);
        break;
      default:
        flipOrder = options.behavior;
    }
  
    flipOrder.forEach(function (step, index) {
      if (placement !== step || flipOrder.length === index + 1) {
        return data;
      }
  
      placement = data.placement.split('-')[0];
      placementOpposite = getOppositePlacement(placement);
  
      var popperOffsets = data.offsets.popper;
      var refOffsets = data.offsets.reference;
  
      // using floor because the reference offsets may contain decimals we are not going to consider here
      var floor = Math.floor;
      var overlapsRef = placement === 'left' && floor(popperOffsets.right) > floor(refOffsets.left) || placement === 'right' && floor(popperOffsets.left) < floor(refOffsets.right) || placement === 'top' && floor(popperOffsets.bottom) > floor(refOffsets.top) || placement === 'bottom' && floor(popperOffsets.top) < floor(refOffsets.bottom);
  
      var overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);
      var overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);
      var overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);
      var overflowsBottom = floor(popperOffsets.bottom) > floor(boundaries.bottom);
  
      var overflowsBoundaries = placement === 'left' && overflowsLeft || placement === 'right' && overflowsRight || placement === 'top' && overflowsTop || placement === 'bottom' && overflowsBottom;
  
      // flip the variation if required
      var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
      var flippedVariation = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);
  
      if (overlapsRef || overflowsBoundaries || flippedVariation) {
        // this boolean to detect any flip loop
        data.flipped = true;
  
        if (overlapsRef || overflowsBoundaries) {
          placement = flipOrder[index + 1];
        }
  
        if (flippedVariation) {
          variation = getOppositeVariation(variation);
        }
  
        data.placement = placement + (variation ? '-' + variation : '');
  
        // this object contains `position`, we want to preserve it along with
        // any additional property we may add in the future
        data.offsets.popper = _extends({}, data.offsets.popper, getPopperOffsets(data.instance.popper, data.offsets.reference, data.placement));
  
        data = runModifiers(data.instance.modifiers, data, 'flip');
      }
    });
    return data;
  }
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by update method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function keepTogether(data) {
    var _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        reference = _data$offsets.reference;
  
    var placement = data.placement.split('-')[0];
    var floor = Math.floor;
    var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
    var side = isVertical ? 'right' : 'bottom';
    var opSide = isVertical ? 'left' : 'top';
    var measurement = isVertical ? 'width' : 'height';
  
    if (popper[side] < floor(reference[opSide])) {
      data.offsets.popper[opSide] = floor(reference[opSide]) - popper[measurement];
    }
    if (popper[opSide] > floor(reference[side])) {
      data.offsets.popper[opSide] = floor(reference[side]);
    }
  
    return data;
  }
  
  /**
   * Converts a string containing value + unit into a px value number
   * @function
   * @memberof {modifiers~offset}
   * @private
   * @argument {String} str - Value + unit string
   * @argument {String} measurement - `height` or `width`
   * @argument {Object} popperOffsets
   * @argument {Object} referenceOffsets
   * @returns {Number|String}
   * Value in pixels, or original string if no values were extracted
   */
  function toValue(str, measurement, popperOffsets, referenceOffsets) {
    // separate value from unit
    var split = str.match(/((?:\-|\+)?\d*\.?\d*)(.*)/);
    var value = +split[1];
    var unit = split[2];
  
    // If it's not a number it's an operator, I guess
    if (!value) {
      return str;
    }
  
    if (unit.indexOf('%') === 0) {
      var element = void 0;
      switch (unit) {
        case '%p':
          element = popperOffsets;
          break;
        case '%':
        case '%r':
        default:
          element = referenceOffsets;
      }
  
      var rect = getClientRect(element);
      return rect[measurement] / 100 * value;
    } else if (unit === 'vh' || unit === 'vw') {
      // if is a vh or vw, we calculate the size based on the viewport
      var size = void 0;
      if (unit === 'vh') {
        size = Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
      } else {
        size = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
      }
      return size / 100 * value;
    } else {
      // if is an explicit pixel unit, we get rid of the unit and keep the value
      // if is an implicit unit, it's px, and we return just the value
      return value;
    }
  }
  
  /**
   * Parse an `offset` string to extrapolate `x` and `y` numeric offsets.
   * @function
   * @memberof {modifiers~offset}
   * @private
   * @argument {String} offset
   * @argument {Object} popperOffsets
   * @argument {Object} referenceOffsets
   * @argument {String} basePlacement
   * @returns {Array} a two cells array with x and y offsets in numbers
   */
  function parseOffset(offset, popperOffsets, referenceOffsets, basePlacement) {
    var offsets = [0, 0];
  
    // Use height if placement is left or right and index is 0 otherwise use width
    // in this way the first offset will use an axis and the second one
    // will use the other one
    var useHeight = ['right', 'left'].indexOf(basePlacement) !== -1;
  
    // Split the offset string to obtain a list of values and operands
    // The regex addresses values with the plus or minus sign in front (+10, -20, etc)
    var fragments = offset.split(/(\+|\-)/).map(function (frag) {
      return frag.trim();
    });
  
    // Detect if the offset string contains a pair of values or a single one
    // they could be separated by comma or space
    var divider = fragments.indexOf(find(fragments, function (frag) {
      return frag.search(/,|\s/) !== -1;
    }));
  
    if (fragments[divider] && fragments[divider].indexOf(',') === -1) {
      console.warn('Offsets separated by white space(s) are deprecated, use a comma (,) instead.');
    }
  
    // If divider is found, we divide the list of values and operands to divide
    // them by ofset X and Y.
    var splitRegex = /\s*,\s*|\s+/;
    var ops = divider !== -1 ? [fragments.slice(0, divider).concat([fragments[divider].split(splitRegex)[0]]), [fragments[divider].split(splitRegex)[1]].concat(fragments.slice(divider + 1))] : [fragments];
  
    // Convert the values with units to absolute pixels to allow our computations
    ops = ops.map(function (op, index) {
      // Most of the units rely on the orientation of the popper
      var measurement = (index === 1 ? !useHeight : useHeight) ? 'height' : 'width';
      var mergeWithPrevious = false;
      return op
      // This aggregates any `+` or `-` sign that aren't considered operators
      // e.g.: 10 + +5 => [10, +, +5]
      .reduce(function (a, b) {
        if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) {
          a[a.length - 1] = b;
          mergeWithPrevious = true;
          return a;
        } else if (mergeWithPrevious) {
          a[a.length - 1] += b;
          mergeWithPrevious = false;
          return a;
        } else {
          return a.concat(b);
        }
      }, [])
      // Here we convert the string values into number values (in px)
      .map(function (str) {
        return toValue(str, measurement, popperOffsets, referenceOffsets);
      });
    });
  
    // Loop trough the offsets arrays and execute the operations
    ops.forEach(function (op, index) {
      op.forEach(function (frag, index2) {
        if (isNumeric(frag)) {
          offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1);
        }
      });
    });
    return offsets;
  }
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by update method
   * @argument {Object} options - Modifiers configuration and options
   * @argument {Number|String} options.offset=0
   * The offset value as described in the modifier description
   * @returns {Object} The data object, properly modified
   */
  function offset(data, _ref) {
    var offset = _ref.offset;
    var placement = data.placement,
        _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        reference = _data$offsets.reference;
  
    var basePlacement = placement.split('-')[0];
  
    var offsets = void 0;
    if (isNumeric(+offset)) {
      offsets = [+offset, 0];
    } else {
      offsets = parseOffset(offset, popper, reference, basePlacement);
    }
  
    if (basePlacement === 'left') {
      popper.top += offsets[0];
      popper.left -= offsets[1];
    } else if (basePlacement === 'right') {
      popper.top += offsets[0];
      popper.left += offsets[1];
    } else if (basePlacement === 'top') {
      popper.left += offsets[0];
      popper.top -= offsets[1];
    } else if (basePlacement === 'bottom') {
      popper.left += offsets[0];
      popper.top += offsets[1];
    }
  
    data.popper = popper;
    return data;
  }
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by `update` method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function preventOverflow(data, options) {
    var boundariesElement = options.boundariesElement || getOffsetParent(data.instance.popper);
  
    // If offsetParent is the reference element, we really want to
    // go one step up and use the next offsetParent as reference to
    // avoid to make this modifier completely useless and look like broken
    if (data.instance.reference === boundariesElement) {
      boundariesElement = getOffsetParent(boundariesElement);
    }
  
    // NOTE: DOM access here
    // resets the popper's position so that the document size can be calculated excluding
    // the size of the popper element itself
    var transformProp = getSupportedPropertyName('transform');
    var popperStyles = data.instance.popper.style; // assignment to help minification
    var top = popperStyles.top,
        left = popperStyles.left,
        transform = popperStyles[transformProp];
  
    popperStyles.top = '';
    popperStyles.left = '';
    popperStyles[transformProp] = '';
  
    var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement, data.positionFixed);
  
    // NOTE: DOM access here
    // restores the original style properties after the offsets have been computed
    popperStyles.top = top;
    popperStyles.left = left;
    popperStyles[transformProp] = transform;
  
    options.boundaries = boundaries;
  
    var order = options.priority;
    var popper = data.offsets.popper;
  
    var check = {
      primary: function primary(placement) {
        var value = popper[placement];
        if (popper[placement] < boundaries[placement] && !options.escapeWithReference) {
          value = Math.max(popper[placement], boundaries[placement]);
        }
        return defineProperty({}, placement, value);
      },
      secondary: function secondary(placement) {
        var mainSide = placement === 'right' ? 'left' : 'top';
        var value = popper[mainSide];
        if (popper[placement] > boundaries[placement] && !options.escapeWithReference) {
          value = Math.min(popper[mainSide], boundaries[placement] - (placement === 'right' ? popper.width : popper.height));
        }
        return defineProperty({}, mainSide, value);
      }
    };
  
    order.forEach(function (placement) {
      var side = ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';
      popper = _extends({}, popper, check[side](placement));
    });
  
    data.offsets.popper = popper;
  
    return data;
  }
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by `update` method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function shift(data) {
    var placement = data.placement;
    var basePlacement = placement.split('-')[0];
    var shiftvariation = placement.split('-')[1];
  
    // if shift shiftvariation is specified, run the modifier
    if (shiftvariation) {
      var _data$offsets = data.offsets,
          reference = _data$offsets.reference,
          popper = _data$offsets.popper;
  
      var isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;
      var side = isVertical ? 'left' : 'top';
      var measurement = isVertical ? 'width' : 'height';
  
      var shiftOffsets = {
        start: defineProperty({}, side, reference[side]),
        end: defineProperty({}, side, reference[side] + reference[measurement] - popper[measurement])
      };
  
      data.offsets.popper = _extends({}, popper, shiftOffsets[shiftvariation]);
    }
  
    return data;
  }
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by update method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function hide(data) {
    if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {
      return data;
    }
  
    var refRect = data.offsets.reference;
    var bound = find(data.instance.modifiers, function (modifier) {
      return modifier.name === 'preventOverflow';
    }).boundaries;
  
    if (refRect.bottom < bound.top || refRect.left > bound.right || refRect.top > bound.bottom || refRect.right < bound.left) {
      // Avoid unnecessary DOM access if visibility hasn't changed
      if (data.hide === true) {
        return data;
      }
  
      data.hide = true;
      data.attributes['x-out-of-boundaries'] = '';
    } else {
      // Avoid unnecessary DOM access if visibility hasn't changed
      if (data.hide === false) {
        return data;
      }
  
      data.hide = false;
      data.attributes['x-out-of-boundaries'] = false;
    }
  
    return data;
  }
  
  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by `update` method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function inner(data) {
    var placement = data.placement;
    var basePlacement = placement.split('-')[0];
    var _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        reference = _data$offsets.reference;
  
    var isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;
  
    var subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;
  
    popper[isHoriz ? 'left' : 'top'] = reference[basePlacement] - (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);
  
    data.placement = getOppositePlacement(placement);
    data.offsets.popper = getClientRect(popper);
  
    return data;
  }
  
  /**
   * Modifier function, each modifier can have a function of this type assigned
   * to its `fn` property.<br />
   * These functions will be called on each update, this means that you must
   * make sure they are performant enough to avoid performance bottlenecks.
   *
   * @function ModifierFn
   * @argument {dataObject} data - The data object generated by `update` method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {dataObject} The data object, properly modified
   */
  
  /**
   * Modifiers are plugins used to alter the behavior of your poppers.<br />
   * Popper.js uses a set of 9 modifiers to provide all the basic functionalities
   * needed by the library.
   *
   * Usually you don't want to override the `order`, `fn` and `onLoad` props.
   * All the other properties are configurations that could be tweaked.
   * @namespace modifiers
   */
  var modifiers = {
    /**
     * Modifier used to shift the popper on the start or end of its reference
     * element.<br />
     * It will read the variation of the `placement` property.<br />
     * It can be one either `-end` or `-start`.
     * @memberof modifiers
     * @inner
     */
    shift: {
      /** @prop {number} order=100 - Index used to define the order of execution */
      order: 100,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: shift
    },
  
    /**
     * The `offset` modifier can shift your popper on both its axis.
     *
     * It accepts the following units:
     * - `px` or unit-less, interpreted as pixels
     * - `%` or `%r`, percentage relative to the length of the reference element
     * - `%p`, percentage relative to the length of the popper element
     * - `vw`, CSS viewport width unit
     * - `vh`, CSS viewport height unit
     *
     * For length is intended the main axis relative to the placement of the popper.<br />
     * This means that if the placement is `top` or `bottom`, the length will be the
     * `width`. In case of `left` or `right`, it will be the `height`.
     *
     * You can provide a single value (as `Number` or `String`), or a pair of values
     * as `String` divided by a comma or one (or more) white spaces.<br />
     * The latter is a deprecated method because it leads to confusion and will be
     * removed in v2.<br />
     * Additionally, it accepts additions and subtractions between different units.
     * Note that multiplications and divisions aren't supported.
     *
     * Valid examples are:
     * ```
     * 10
     * '10%'
     * '10, 10'
     * '10%, 10'
     * '10 + 10%'
     * '10 - 5vh + 3%'
     * '-10px + 5vh, 5px - 6%'
     * ```
     * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap
     * > with their reference element, unfortunately, you will have to disable the `flip` modifier.
     * > You can read more on this at this [issue](https://github.com/FezVrasta/popper.js/issues/373).
     *
     * @memberof modifiers
     * @inner
     */
    offset: {
      /** @prop {number} order=200 - Index used to define the order of execution */
      order: 200,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: offset,
      /** @prop {Number|String} offset=0
       * The offset value as described in the modifier description
       */
      offset: 0
    },
  
    /**
     * Modifier used to prevent the popper from being positioned outside the boundary.
     *
     * A scenario exists where the reference itself is not within the boundaries.<br />
     * We can say it has "escaped the boundaries" — or just "escaped".<br />
     * In this case we need to decide whether the popper should either:
     *
     * - detach from the reference and remain "trapped" in the boundaries, or
     * - if it should ignore the boundary and "escape with its reference"
     *
     * When `escapeWithReference` is set to`true` and reference is completely
     * outside its boundaries, the popper will overflow (or completely leave)
     * the boundaries in order to remain attached to the edge of the reference.
     *
     * @memberof modifiers
     * @inner
     */
    preventOverflow: {
      /** @prop {number} order=300 - Index used to define the order of execution */
      order: 300,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: preventOverflow,
      /**
       * @prop {Array} [priority=['left','right','top','bottom']]
       * Popper will try to prevent overflow following these priorities by default,
       * then, it could overflow on the left and on top of the `boundariesElement`
       */
      priority: ['left', 'right', 'top', 'bottom'],
      /**
       * @prop {number} padding=5
       * Amount of pixel used to define a minimum distance between the boundaries
       * and the popper. This makes sure the popper always has a little padding
       * between the edges of its container
       */
      padding: 5,
      /**
       * @prop {String|HTMLElement} boundariesElement='scrollParent'
       * Boundaries used by the modifier. Can be `scrollParent`, `window`,
       * `viewport` or any DOM element.
       */
      boundariesElement: 'scrollParent'
    },
  
    /**
     * Modifier used to make sure the reference and its popper stay near each other
     * without leaving any gap between the two. Especially useful when the arrow is
     * enabled and you want to ensure that it points to its reference element.
     * It cares only about the first axis. You can still have poppers with margin
     * between the popper and its reference element.
     * @memberof modifiers
     * @inner
     */
    keepTogether: {
      /** @prop {number} order=400 - Index used to define the order of execution */
      order: 400,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: keepTogether
    },
  
    /**
     * This modifier is used to move the `arrowElement` of the popper to make
     * sure it is positioned between the reference element and its popper element.
     * It will read the outer size of the `arrowElement` node to detect how many
     * pixels of conjunction are needed.
     *
     * It has no effect if no `arrowElement` is provided.
     * @memberof modifiers
     * @inner
     */
    arrow: {
      /** @prop {number} order=500 - Index used to define the order of execution */
      order: 500,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: arrow,
      /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */
      element: '[x-arrow]'
    },
  
    /**
     * Modifier used to flip the popper's placement when it starts to overlap its
     * reference element.
     *
     * Requires the `preventOverflow` modifier before it in order to work.
     *
     * **NOTE:** this modifier will interrupt the current update cycle and will
     * restart it if it detects the need to flip the placement.
     * @memberof modifiers
     * @inner
     */
    flip: {
      /** @prop {number} order=600 - Index used to define the order of execution */
      order: 600,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: flip,
      /**
       * @prop {String|Array} behavior='flip'
       * The behavior used to change the popper's placement. It can be one of
       * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid
       * placements (with optional variations)
       */
      behavior: 'flip',
      /**
       * @prop {number} padding=5
       * The popper will flip if it hits the edges of the `boundariesElement`
       */
      padding: 5,
      /**
       * @prop {String|HTMLElement} boundariesElement='viewport'
       * The element which will define the boundaries of the popper position.
       * The popper will never be placed outside of the defined boundaries
       * (except if `keepTogether` is enabled)
       */
      boundariesElement: 'viewport'
    },
  
    /**
     * Modifier used to make the popper flow toward the inner of the reference element.
     * By default, when this modifier is disabled, the popper will be placed outside
     * the reference element.
     * @memberof modifiers
     * @inner
     */
    inner: {
      /** @prop {number} order=700 - Index used to define the order of execution */
      order: 700,
      /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */
      enabled: false,
      /** @prop {ModifierFn} */
      fn: inner
    },
  
    /**
     * Modifier used to hide the popper when its reference element is outside of the
     * popper boundaries. It will set a `x-out-of-boundaries` attribute which can
     * be used to hide with a CSS selector the popper when its reference is
     * out of boundaries.
     *
     * Requires the `preventOverflow` modifier before it in order to work.
     * @memberof modifiers
     * @inner
     */
    hide: {
      /** @prop {number} order=800 - Index used to define the order of execution */
      order: 800,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: hide
    },
  
    /**
     * Computes the style that will be applied to the popper element to gets
     * properly positioned.
     *
     * Note that this modifier will not touch the DOM, it just prepares the styles
     * so that `applyStyle` modifier can apply it. This separation is useful
     * in case you need to replace `applyStyle` with a custom implementation.
     *
     * This modifier has `850` as `order` value to maintain backward compatibility
     * with previous versions of Popper.js. Expect the modifiers ordering method
     * to change in future major versions of the library.
     *
     * @memberof modifiers
     * @inner
     */
    computeStyle: {
      /** @prop {number} order=850 - Index used to define the order of execution */
      order: 850,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: computeStyle,
      /**
       * @prop {Boolean} gpuAcceleration=true
       * If true, it uses the CSS 3D transformation to position the popper.
       * Otherwise, it will use the `top` and `left` properties
       */
      gpuAcceleration: true,
      /**
       * @prop {string} [x='bottom']
       * Where to anchor the X axis (`bottom` or `top`). AKA X offset origin.
       * Change this if your popper should grow in a direction different from `bottom`
       */
      x: 'bottom',
      /**
       * @prop {string} [x='left']
       * Where to anchor the Y axis (`left` or `right`). AKA Y offset origin.
       * Change this if your popper should grow in a direction different from `right`
       */
      y: 'right'
    },
  
    /**
     * Applies the computed styles to the popper element.
     *
     * All the DOM manipulations are limited to this modifier. This is useful in case
     * you want to integrate Popper.js inside a framework or view library and you
     * want to delegate all the DOM manipulations to it.
     *
     * Note that if you disable this modifier, you must make sure the popper element
     * has its position set to `absolute` before Popper.js can do its work!
     *
     * Just disable this modifier and define your own to achieve the desired effect.
     *
     * @memberof modifiers
     * @inner
     */
    applyStyle: {
      /** @prop {number} order=900 - Index used to define the order of execution */
      order: 900,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: applyStyle,
      /** @prop {Function} */
      onLoad: applyStyleOnLoad,
      /**
       * @deprecated since version 1.10.0, the property moved to `computeStyle` modifier
       * @prop {Boolean} gpuAcceleration=true
       * If true, it uses the CSS 3D transformation to position the popper.
       * Otherwise, it will use the `top` and `left` properties
       */
      gpuAcceleration: undefined
    }
  };
  
  /**
   * The `dataObject` is an object containing all the information used by Popper.js.
   * This object is passed to modifiers and to the `onCreate` and `onUpdate` callbacks.
   * @name dataObject
   * @property {Object} data.instance The Popper.js instance
   * @property {String} data.placement Placement applied to popper
   * @property {String} data.originalPlacement Placement originally defined on init
   * @property {Boolean} data.flipped True if popper has been flipped by flip modifier
   * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper
   * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier
   * @property {Object} data.styles Any CSS property defined here will be applied to the popper. It expects the JavaScript nomenclature (eg. `marginBottom`)
   * @property {Object} data.arrowStyles Any CSS property defined here will be applied to the popper arrow. It expects the JavaScript nomenclature (eg. `marginBottom`)
   * @property {Object} data.boundaries Offsets of the popper boundaries
   * @property {Object} data.offsets The measurements of popper, reference and arrow elements
   * @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values
   * @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values
   * @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0
   */
  
  /**
   * Default options provided to Popper.js constructor.<br />
   * These can be overridden using the `options` argument of Popper.js.<br />
   * To override an option, simply pass an object with the same
   * structure of the `options` object, as the 3rd argument. For example:
   * ```
   * new Popper(ref, pop, {
   *   modifiers: {
   *     preventOverflow: { enabled: false }
   *   }
   * })
   * ```
   * @type {Object}
   * @static
   * @memberof Popper
   */
  var Defaults = {
    /**
     * Popper's placement.
     * @prop {Popper.placements} placement='bottom'
     */
    placement: 'bottom',
  
    /**
     * Set this to true if you want popper to position it self in 'fixed' mode
     * @prop {Boolean} positionFixed=false
     */
    positionFixed: false,
  
    /**
     * Whether events (resize, scroll) are initially enabled.
     * @prop {Boolean} eventsEnabled=true
     */
    eventsEnabled: true,
  
    /**
     * Set to true if you want to automatically remove the popper when
     * you call the `destroy` method.
     * @prop {Boolean} removeOnDestroy=false
     */
    removeOnDestroy: false,
  
    /**
     * Callback called when the popper is created.<br />
     * By default, it is set to no-op.<br />
     * Access Popper.js instance with `data.instance`.
     * @prop {onCreate}
     */
    onCreate: function onCreate() {},
  
    /**
     * Callback called when the popper is updated. This callback is not called
     * on the initialization/creation of the popper, but only on subsequent
     * updates.<br />
     * By default, it is set to no-op.<br />
     * Access Popper.js instance with `data.instance`.
     * @prop {onUpdate}
     */
    onUpdate: function onUpdate() {},
  
    /**
     * List of modifiers used to modify the offsets before they are applied to the popper.
     * They provide most of the functionalities of Popper.js.
     * @prop {modifiers}
     */
    modifiers: modifiers
  };
  
  /**
   * @callback onCreate
   * @param {dataObject} data
   */
  
  /**
   * @callback onUpdate
   * @param {dataObject} data
   */
  
  // Utils
  // Methods
  var Popper = function () {
    /**
     * Creates a new Popper.js instance.
     * @class Popper
     * @param {HTMLElement|referenceObject} reference - The reference element used to position the popper
     * @param {HTMLElement} popper - The HTML element used as the popper
     * @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)
     * @return {Object} instance - The generated Popper.js instance
     */
    function Popper(reference, popper) {
      var _this = this;
  
      var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
      classCallCheck(this, Popper);
  
      this.scheduleUpdate = function () {
        return requestAnimationFrame(_this.update);
      };
  
      // make update() debounced, so that it only runs at most once-per-tick
      this.update = debounce(this.update.bind(this));
  
      // with {} we create a new object with the options inside it
      this.options = _extends({}, Popper.Defaults, options);
  
      // init state
      this.state = {
        isDestroyed: false,
        isCreated: false,
        scrollParents: []
      };
  
      // get reference and popper elements (allow jQuery wrappers)
      this.reference = reference && reference.jquery ? reference[0] : reference;
      this.popper = popper && popper.jquery ? popper[0] : popper;
  
      // Deep merge modifiers options
      this.options.modifiers = {};
      Object.keys(_extends({}, Popper.Defaults.modifiers, options.modifiers)).forEach(function (name) {
        _this.options.modifiers[name] = _extends({}, Popper.Defaults.modifiers[name] || {}, options.modifiers ? options.modifiers[name] : {});
      });
  
      // Refactoring modifiers' list (Object => Array)
      this.modifiers = Object.keys(this.options.modifiers).map(function (name) {
        return _extends({
          name: name
        }, _this.options.modifiers[name]);
      })
      // sort the modifiers by order
      .sort(function (a, b) {
        return a.order - b.order;
      });
  
      // modifiers have the ability to execute arbitrary code when Popper.js get inited
      // such code is executed in the same order of its modifier
      // they could add new properties to their options configuration
      // BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`!
      this.modifiers.forEach(function (modifierOptions) {
        if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) {
          modifierOptions.onLoad(_this.reference, _this.popper, _this.options, modifierOptions, _this.state);
        }
      });
  
      // fire the first update to position the popper in the right place
      this.update();
  
      var eventsEnabled = this.options.eventsEnabled;
      if (eventsEnabled) {
        // setup event listeners, they will take care of update the position in specific situations
        this.enableEventListeners();
      }
  
      this.state.eventsEnabled = eventsEnabled;
    }
  
    // We can't use class properties because they don't get listed in the
    // class prototype and break stuff like Sinon stubs
  
  
    createClass(Popper, [{
      key: 'update',
      value: function update$$1() {
        return update.call(this);
      }
    }, {
      key: 'destroy',
      value: function destroy$$1() {
        return destroy.call(this);
      }
    }, {
      key: 'enableEventListeners',
      value: function enableEventListeners$$1() {
        return enableEventListeners.call(this);
      }
    }, {
      key: 'disableEventListeners',
      value: function disableEventListeners$$1() {
        return disableEventListeners.call(this);
      }
  
      /**
       * Schedules an update. It will run on the next UI update available.
       * @method scheduleUpdate
       * @memberof Popper
       */
  
  
      /**
       * Collection of utilities useful when writing custom modifiers.
       * Starting from version 1.7, this method is available only if you
       * include `popper-utils.js` before `popper.js`.
       *
       * **DEPRECATION**: This way to access PopperUtils is deprecated
       * and will be removed in v2! Use the PopperUtils module directly instead.
       * Due to the high instability of the methods contained in Utils, we can't
       * guarantee them to follow semver. Use them at your own risk!
       * @static
       * @private
       * @type {Object}
       * @deprecated since version 1.8
       * @member Utils
       * @memberof Popper
       */
  
    }]);
    return Popper;
  }();
  
  /**
   * The `referenceObject` is an object that provides an interface compatible with Popper.js
   * and lets you use it as replacement of a real DOM node.<br />
   * You can use this method to position a popper relatively to a set of coordinates
   * in case you don't have a DOM node to use as reference.
   *
   * ```
   * new Popper(referenceObject, popperNode);
   * ```
   *
   * NB: This feature isn't supported in Internet Explorer 10.
   * @name referenceObject
   * @property {Function} data.getBoundingClientRect
   * A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method.
   * @property {number} data.clientWidth
   * An ES6 getter that will return the width of the virtual reference element.
   * @property {number} data.clientHeight
   * An ES6 getter that will return the height of the virtual reference element.
   */
  
  
  Popper.Utils = (typeof window !== 'undefined' ? window : global).PopperUtils;
  Popper.placements = placements;
  Popper.Defaults = Defaults;
  
  /* harmony default export */ __webpack_exports__["default"] = (Popper);
  //# sourceMappingURL=popper.js.map
  
  /* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../../../webpack/buildin/global.js */ "./node_modules/webpack/buildin/global.js")))
  
  /***/ }),
  
  /***/ "./node_modules/process/browser.js":
  /*!*****************************************!*\
    !*** ./node_modules/process/browser.js ***!
    \*****************************************/
  /*! no static exports found */
  /***/ (function(module, exports) {
  
  // shim for using process in browser
  var process = module.exports = {};
  
  // cached from whatever global is present so that test runners that stub it
  // don't break things.  But we need to wrap it in a try catch in case it is
  // wrapped in strict mode code which doesn't define any globals.  It's inside a
  // function because try/catches deoptimize in certain engines.
  
  var cachedSetTimeout;
  var cachedClearTimeout;
  
  function defaultSetTimout() {
      throw new Error('setTimeout has not been defined');
  }
  function defaultClearTimeout () {
      throw new Error('clearTimeout has not been defined');
  }
  (function () {
      try {
          if (typeof setTimeout === 'function') {
              cachedSetTimeout = setTimeout;
          } else {
              cachedSetTimeout = defaultSetTimout;
          }
      } catch (e) {
          cachedSetTimeout = defaultSetTimout;
      }
      try {
          if (typeof clearTimeout === 'function') {
              cachedClearTimeout = clearTimeout;
          } else {
              cachedClearTimeout = defaultClearTimeout;
          }
      } catch (e) {
          cachedClearTimeout = defaultClearTimeout;
      }
  } ())
  function runTimeout(fun) {
      if (cachedSetTimeout === setTimeout) {
          //normal enviroments in sane situations
          return setTimeout(fun, 0);
      }
      // if setTimeout wasn't available but was latter defined
      if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
          cachedSetTimeout = setTimeout;
          return setTimeout(fun, 0);
      }
      try {
          // when when somebody has screwed with setTimeout but no I.E. maddness
          return cachedSetTimeout(fun, 0);
      } catch(e){
          try {
              // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
              return cachedSetTimeout.call(null, fun, 0);
          } catch(e){
              // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
              return cachedSetTimeout.call(this, fun, 0);
          }
      }
  
  
  }
  function runClearTimeout(marker) {
      if (cachedClearTimeout === clearTimeout) {
          //normal enviroments in sane situations
          return clearTimeout(marker);
      }
      // if clearTimeout wasn't available but was latter defined
      if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
          cachedClearTimeout = clearTimeout;
          return clearTimeout(marker);
      }
      try {
          // when when somebody has screwed with setTimeout but no I.E. maddness
          return cachedClearTimeout(marker);
      } catch (e){
          try {
              // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
              return cachedClearTimeout.call(null, marker);
          } catch (e){
              // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
              // Some versions of I.E. have different rules for clearTimeout vs setTimeout
              return cachedClearTimeout.call(this, marker);
          }
      }
  
  
  
  }
  var queue = [];
  var draining = false;
  var currentQueue;
  var queueIndex = -1;
  
  function cleanUpNextTick() {
      if (!draining || !currentQueue) {
          return;
      }
      draining = false;
      if (currentQueue.length) {
          queue = currentQueue.concat(queue);
      } else {
          queueIndex = -1;
      }
      if (queue.length) {
          drainQueue();
      }
  }
  
  function drainQueue() {
      if (draining) {
          return;
      }
      var timeout = runTimeout(cleanUpNextTick);
      draining = true;
  
      var len = queue.length;
      while(len) {
          currentQueue = queue;
          queue = [];
          while (++queueIndex < len) {
              if (currentQueue) {
                  currentQueue[queueIndex].run();
              }
          }
          queueIndex = -1;
          len = queue.length;
      }
      currentQueue = null;
      draining = false;
      runClearTimeout(timeout);
  }
  
  process.nextTick = function (fun) {
      var args = new Array(arguments.length - 1);
      if (arguments.length > 1) {
          for (var i = 1; i < arguments.length; i++) {
              args[i - 1] = arguments[i];
          }
      }
      queue.push(new Item(fun, args));
      if (queue.length === 1 && !draining) {
          runTimeout(drainQueue);
      }
  };
  
  // v8 likes predictible objects
  function Item(fun, array) {
      this.fun = fun;
      this.array = array;
  }
  Item.prototype.run = function () {
      this.fun.apply(null, this.array);
  };
  process.title = 'browser';
  process.browser = true;
  process.env = {};
  process.argv = [];
  process.version = ''; // empty string to avoid regexp issues
  process.versions = {};
  
  function noop() {}
  
  process.on = noop;
  process.addListener = noop;
  process.once = noop;
  process.off = noop;
  process.removeListener = noop;
  process.removeAllListeners = noop;
  process.emit = noop;
  process.prependListener = noop;
  process.prependOnceListener = noop;
  
  process.listeners = function (name) { return [] }
  
  process.binding = function (name) {
      throw new Error('process.binding is not supported');
  };
  
  process.cwd = function () { return '/' };
  process.chdir = function (dir) {
      throw new Error('process.chdir is not supported');
  };
  process.umask = function() { return 0; };
  
  
  /***/ }),
  
  /***/ "./node_modules/webpack/buildin/global.js":
  /*!***********************************!*\
    !*** (webpack)/buildin/global.js ***!
    \***********************************/
  /*! no static exports found */
  /***/ (function(module, exports) {
  
  var g;
  
  // This works in non-strict mode
  g = (function() {
  	return this;
  })();
  
  try {
  	// This works if eval is allowed (see CSP)
  	g = g || new Function("return this")();
  } catch (e) {
  	// This works if the window reference is available
  	if (typeof window === "object") g = window;
  }
  
  // g can still be undefined, but nothing to do about it...
  // We return undefined, instead of nothing here, so it's
  // easier to handle this case. if(!global) { ...}
  
  module.exports = g;
  
  
  /***/ }),
  
  /***/ "./node_modules/webpack/buildin/module.js":
  /*!***********************************!*\
    !*** (webpack)/buildin/module.js ***!
    \***********************************/
  /*! no static exports found */
  /***/ (function(module, exports) {
  
  module.exports = function(module) {
  	if (!module.webpackPolyfill) {
  		module.deprecate = function() {};
  		module.paths = [];
  		// module.parent = undefined by default
  		if (!module.children) module.children = [];
  		Object.defineProperty(module, "loaded", {
  			enumerable: true,
  			get: function() {
  				return module.l;
  			}
  		});
  		Object.defineProperty(module, "id", {
  			enumerable: true,
  			get: function() {
  				return module.i;
  			}
  		});
  		module.webpackPolyfill = 1;
  	}
  	return module;
  };
  
  
  /***/ }),
  
  /***/ "./resources/js/app.js":
  /*!*****************************!*\
    !*** ./resources/js/app.js ***!
    \*****************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  /**
   * First we will load all of this project's JavaScript dependencies which
   * includes Vue and other libraries. It is a great starting point when
   * building robust, powerful web applications using Vue and Laravel.
   */
  __webpack_require__(/*! ./bootstrap */ "./resources/js/bootstrap.js");
  
  __webpack_require__(/*! ./custom */ "./resources/js/custom.js");
  
  /***/ }),
  
  /***/ "./resources/js/bootstrap.js":
  /*!***********************************!*\
    !*** ./resources/js/bootstrap.js ***!
    \***********************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  window._ = __webpack_require__(/*! lodash */ "./node_modules/lodash/lodash.js");
  /**
   * We'll load jQuery and the Bootstrap jQuery plugin which provides support
   * for JavaScript based Bootstrap features such as modals and tabs. This
   * code may be modified to fit the specific needs of your application.
   */
  
  try {
    window.Popper = __webpack_require__(/*! popper.js */ "./node_modules/popper.js/dist/esm/popper.js").default;
    window.$ = window.jQuery = __webpack_require__(/*! jquery */ "./node_modules/jquery/dist/jquery.js");
  
    __webpack_require__(/*! bootstrap-sass */ "./node_modules/bootstrap-sass/assets/javascripts/bootstrap.js");
  } catch (e) {}
  /**
   * We'll load the axios HTTP library which allows us to easily issue requests
   * to our Laravel back-end. This library automatically handles sending the
   * CSRF token as a header based on the value of the "XSRF" token cookie.
   */
  
  
  window.axios = __webpack_require__(/*! axios */ "./node_modules/axios/index.js");
  window.axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';
  /**
   * Next we will register the CSRF Token as a common header with Axios so that
   * all outgoing HTTP requests automatically have it attached. This is just
   * a simple convenience so we don't have to attach every token manually.
   */
  
  var token = document.head.querySelector('meta[name="csrf-token"]');
  
  if (token) {
    window.axios.defaults.headers.common['X-CSRF-TOKEN'] = token.content;
  } else {
    console.error('CSRF token not found: https://laravel.com/docs/csrf#csrf-x-csrf-token');
  }
  /**
   * Echo exposes an expressive API for subscribing to channels and listening
   * for events that are broadcast by Laravel. Echo and event broadcasting
   * allows your team to easily build robust real-time web applications.
   */
  // import Echo from 'laravel-echo'
  // window.Pusher = require('pusher-js');
  // window.Echo = new Echo({
  //     broadcaster: 'pusher',
  //     key: process.env.MIX_PUSHER_APP_KEY,
  //     cluster: process.env.MIX_PUSHER_APP_CLUSTER,
  //     encrypted: true
  // });
  
  /***/ }),
  
  /***/ "./resources/js/custom.js":
  /*!********************************!*\
    !*** ./resources/js/custom.js ***!
    \********************************/
  /*! no static exports found */
  /***/ (function(module, exports) {
  
  
  
  /***/ }),
  
  /***/ "./resources/sass/app.scss":
  /*!*********************************!*\
    !*** ./resources/sass/app.scss ***!
    \*********************************/
  /*! no static exports found */
  /***/ (function(module, exports) {
  
  // removed by extract-text-webpack-plugin
  
  /***/ }),
  
  /***/ 0:
  /*!*************************************************************!*\
    !*** multi ./resources/js/app.js ./resources/sass/app.scss ***!
    \*************************************************************/
  /*! no static exports found */
  /***/ (function(module, exports, __webpack_require__) {
  
  __webpack_require__(/*! D:\University\Semesters\5 Semester\RPV\bus-eCommerce\resources\js\app.js */"./resources/js/app.js");
  module.exports = __webpack_require__(/*! D:\University\Semesters\5 Semester\RPV\bus-eCommerce\resources\sass\app.scss */"./resources/sass/app.scss");
  
  
  /***/ })
  
  /******/ });