text: import Vue from 'vue';
  import { isString, isObject } from 'xxgcs-element-ui/src/utils/types';
  
  const hasOwnProperty = Object.prototype.hasOwnProperty;
  
  export function noop() {};
  
  export function hasOwn(obj, key) {
    return hasOwnProperty.call(obj, key);
  };
  
  function extend(to, _from) {
    for (let key in _from) {
      to[key] = _from[key];
    }
    return to;
  };
  
  export function toObject(arr) {
    var res = {};
    for (let i = 0; i < arr.length; i++) {
      if (arr[i]) {
        extend(res, arr[i]);
      }
    }
    return res;
  };
  
  export const getValueByPath = function(object, prop) {
    prop = prop || '';
    const paths = prop.split('.');
    let current = object;
    let result = null;
    for (let i = 0, j = paths.length; i < j; i++) {
      const path = paths[i];
      if (!current) break;
  
      if (i === j - 1) {
        result = current[path];
        break;
      }
      current = current[path];
    }
    return result;
  };
  
  export function getPropByPath(obj, path, strict) {
    let tempObj = obj;
    path = path.replace(/\[(\w+)\]/g, '.$1');
    path = path.replace(/^\./, '');
  
    let keyArr = path.split('.');
    let i = 0;
    for (let len = keyArr.length; i < len - 1; ++i) {
      if (!tempObj && !strict) break;
      let key = keyArr[i];
      if (key in tempObj) {
        tempObj = tempObj[key];
      } else {
        if (strict) {
          throw new Error('please transfer a valid prop path to form item!');
        }
        break;
      }
    }
    return {
      o: tempObj,
      k: keyArr[i],
      v: tempObj ? tempObj[keyArr[i]] : null
    };
  };
  
  export const generateId = function() {
    return Math.floor(Math.random() * 10000);
  };
  
  export const valueEquals = (a, b) => {
    // see: https://stackoverflow.com/questions/3115982/how-to-check-if-two-arrays-are-equal-with-javascript
    if (a === b) return true;
    if (!(a instanceof Array)) return false;
    if (!(b instanceof Array)) return false;
    if (a.length !== b.length) return false;
    for (let i = 0; i !== a.length; ++i) {
      if (a[i] !== b[i]) return false;
    }
    return true;
  };
  
  export const escapeRegexpString = (value = '') => String(value).replace(/[|\\{}()[\]^$+*?.]/g, '\\$&');
  
  // TODO: use native Array.find, Array.findIndex when IE support is dropped
  export const arrayFindIndex = function(arr, pred) {
    for (let i = 0; i !== arr.length; ++i) {
      if (pred(arr[i])) {
        return i;
      }
    }
    return -1;
  };
  
  export const arrayFind = function(arr, pred) {
    const idx = arrayFindIndex(arr, pred);
    return idx !== -1 ? arr[idx] : undefined;
  };
  
  // coerce truthy value to array
  export const coerceTruthyValueToArray = function(val) {
    if (Array.isArray(val)) {
      return val;
    } else if (val) {
      return [val];
    } else {
      return [];
    }
  };
  
  export const isIE = function() {
    return !Vue.prototype.$isServer && !isNaN(Number(document.documentMode));
  };
  
  export const isEdge = function() {
    return !Vue.prototype.$isServer && navigator.userAgent.indexOf('Edge') > -1;
  };
  
  export const isFirefox = function() {
    return !Vue.prototype.$isServer && !!window.navigator.userAgent.match(/firefox/i);
  };
  
  export const autoprefixer = function(style) {
    if (typeof style !== 'object') return style;
    const rules = ['transform', 'transition', 'animation'];
    const prefixes = ['ms-', 'webkit-'];
    rules.forEach(rule => {
      const value = style[rule];
      if (rule && value) {
        prefixes.forEach(prefix => {
          style[prefix + rule] = value;
        });
      }
    });
    return style;
  };
  
  export const kebabCase = function(str) {
    const hyphenateRE = /([^-])([A-Z])/g;
    return str
      .replace(hyphenateRE, '$1-$2')
      .replace(hyphenateRE, '$1-$2')
      .toLowerCase();
  };
  
  export const capitalize = function(str) {
    if (!isString(str)) return str;
    return str.charAt(0).toUpperCase() + str.slice(1);
  };
  
  export const looseEqual = function(a, b) {
    const isObjectA = isObject(a);
    const isObjectB = isObject(b);
    if (isObjectA && isObjectB) {
      return JSON.stringify(a) === JSON.stringify(b);
    } else if (!isObjectA && !isObjectB) {
      return String(a) === String(b);
    } else {
      return false;
    }
  };
  
  export const arrayEquals = function(arrayA, arrayB) {
    arrayA = arrayA || [];
    arrayB = arrayB || [];
  
    if (arrayA.length !== arrayB.length) {
      return false;
    }
  
    for (let i = 0; i < arrayA.length; i++) {
      if (!looseEqual(arrayA[i], arrayB[i])) {
        return false;
      }
    }
  
    return true;
  };
  
  export const isEqual = function(value1, value2) {
    if (Array.isArray(value1) && Array.isArray(value2)) {
      return arrayEquals(value1, value2);
    }
    return looseEqual(value1, value2);
  };
  
  export const isEmpty = function(val) {
    // null or undefined
    if (val == null) return true;
  
    if (typeof val === 'boolean') return false;
  
    if (typeof val === 'number') return !val;
  
    if (val instanceof Error) return val.message === '';
  
    switch (Object.prototype.toString.call(val)) {
      // String or Array
      case '[object String]':
      case '[object Array]':
        return !val.length;
  
      // Map or Set or File
      case '[object File]':
      case '[object Map]':
      case '[object Set]': {
        return !val.size;
      }
      // Plain Object
      case '[object Object]': {
        return !Object.keys(val).length;
      }
    }
  
    return false;
  };
  
  export function rafThrottle(fn) {
    let locked = false;
    return function(...args) {
      if (locked) return;
      locked = true;
      window.requestAnimationFrame(_ => {
        fn.apply(this, args);
        locked = false;
      });
    };
  }
  
  export function objToArray(obj) {
    if (Array.isArray(obj)) {
      return obj;
    }
    return isEmpty(obj) ? [] : [obj];
  }
  