text: /**
   * @class Ext.util.AbstractMixedCollection
   * @private
   */
  Ext.define('Ext.util.AbstractMixedCollection', {
      requires: ['Ext.util.Filter'],
  
      mixins: {
          observable: 'Ext.util.Observable'
      },
  
      /**
       * @property {Boolean} isMixedCollection
       * `true` in this class to identify an object as an instantiated MixedCollection, or subclass thereof.
       */
      isMixedCollection: true,
  
      /**
       * @private Mutation counter which is incremented upon add and remove.
       */
      generation: 0,
  
      constructor: function(allowFunctions, keyFn) {
          var me = this;
  
          me.items = [];
          me.map = {};
          me.keys = [];
          me.length = 0;
  
              /**
               * @event clear
               * Fires when the collection is cleared.
               * @since Ext 1
               */
  
              /**
               * @event add
               * Fires when an item is added to the collection.
               * @param {Number} index The index at which the item was added.
               * @param {Object} o The item added.
               * @param {String} key The key associated with the added item.
               * @since Ext 1
               */
  
              /**
               * @event replace
               * Fires when an item is replaced in the collection.
               * @param {String} key he key associated with the new added.
               * @param {Object} old The item being replaced.
               * @param {Object} new The new item.
               * @since Ext 1
               */
              /**
               * @event remove
               * Fires when an item is removed from the collection.
               * @param {Object} o The item being removed.
               * @param {String} key (optional) The key associated with the removed item.
               * @since Ext 1
               */
  
          me.allowFunctions = allowFunctions === true;
  
          if (keyFn) {
              me.getKey = keyFn;
          }
  
          me.mixins.observable.constructor.call(me);
      },
  
      /**
       * @cfg {Boolean} allowFunctions Specify <code>true</code> if the {@link #addAll}
       * function should add function references to the collection. Defaults to
       * <code>false</code>.
       * @since Ext 3
       */
      allowFunctions : false,
  
      /**
       * Adds an item to the collection. Fires the {@link #event-add} event when complete.
       *
       * @param {String/Object} key The key to associate with the item, or the new item.
       *
       * If a {@link #getKey} implementation was specified for this MixedCollection,
       * or if the key of the stored items is in a property called `id`,
       * the MixedCollection will be able to *derive* the key for the new item.
       * In this case just pass the new item in this parameter.
       *
       * @param {Object} [o] The item to add.
       *
       * @return {Object} The item added.
       * @since Ext 1
       */
      add : function(key, obj){
          var me = this,
              myObj = obj,
              myKey = key,
              old;
  
          if (arguments.length == 1) {
              myObj = myKey;
              myKey = me.getKey(myObj);
          }
          if (typeof myKey != 'undefined' && myKey !== null) {
              old = me.map[myKey];
              if (typeof old != 'undefined') {
                  return me.replace(myKey, myObj);
              }
              me.map[myKey] = myObj;
          }
          me.generation++;
          me.length++;
          me.items.push(myObj);
          me.keys.push(myKey);
          if (me.hasListeners.add) {
              me.fireEvent('add', me.length - 1, myObj, myKey);
          }
          return myObj;
      },
  
      /**
        * MixedCollection has a generic way to fetch keys if you implement getKey.  The default implementation
        * simply returns <b><code>item.id</code></b> but you can provide your own implementation
        * to return a different value as in the following examples:<pre><code>
  // normal way
  var mc = new Ext.util.MixedCollection();
  mc.add(someEl.dom.id, someEl);
  mc.add(otherEl.dom.id, otherEl);
  //and so on
  
  // using getKey
  var mc = new Ext.util.MixedCollection();
  mc.getKey = function(el){
     return el.dom.id;
  };
  mc.add(someEl);
  mc.add(otherEl);
  
  // or via the constructor
  var mc = new Ext.util.MixedCollection(false, function(el){
     return el.dom.id;
  });
  mc.add(someEl);
  mc.add(otherEl);
       * </code></pre>
       * @param {Object} item The item for which to find the key.
       * @return {Object} The key for the passed item.
       * @since Ext 1
       */
      getKey : function(o){
           return o.id;
      },
  
      /**
       * Replaces an item in the collection. Fires the {@link #event-replace} event when complete.
       * @param {String} key <p>The key associated with the item to replace, or the replacement item.</p>
       * <p>If you supplied a {@link #getKey} implementation for this MixedCollection, or if the key
       * of your stored items is in a property called <code><b>id</b></code>, then the MixedCollection
       * will be able to <i>derive</i> the key of the replacement item. If you want to replace an item
       * with one having the same key value, then just pass the replacement item in this parameter.</p>
       * @param o {Object} o (optional) If the first parameter passed was a key, the item to associate
       * with that key.
       * @return {Object}  The new item.
       * @since Ext 1
       */
      replace : function(key, o){
          var me = this,
              old,
              index;
  
          if (arguments.length == 1) {
              o = arguments[0];
              key = me.getKey(o);
          }
          old = me.map[key];
          if (typeof key == 'undefined' || key === null || typeof old == 'undefined') {
               return me.add(key, o);
          }
          me.generation++;
          index = me.indexOfKey(key);
          me.items[index] = o;
          me.map[key] = o;
          if (me.hasListeners.replace) {
              me.fireEvent('replace', key, old, o);
          }
          return o;
      },
  
      /**
       * Adds all elements of an Array or an Object to the collection.
       * @param {Object/Array} objs An Object containing properties which will be added
       * to the collection, or an Array of values, each of which are added to the collection.
       * Functions references will be added to the collection if <code>{@link #allowFunctions}</code>
       * has been set to <code>true</code>.
       * @since Ext 1
       */
      addAll : function(objs){
          var me = this,
              i = 0,
              args,
              len,
              key;
  
          if (arguments.length > 1 || Ext.isArray(objs)) {
              args = arguments.length > 1 ? arguments : objs;
              for (len = args.length; i < len; i++) {
                  me.add(args[i]);
              }
          } else {
              for (key in objs) {
                  if (objs.hasOwnProperty(key)) {
                      if (me.allowFunctions || typeof objs[key] != 'function') {
                          me.add(key, objs[key]);
                      }
                  }
              }
          }
      },
  
      /**
       * Executes the specified function once for every item in the collection.
       * The function should return a boolean value.
       * Returning false from the function will stop the iteration.
       *
       * @param {Function} fn The function to execute for each item.
       * @param {Mixed} fn.item The collection item.
       * @param {Number} fn.index The index of item.
       * @param {Number} fn.len Total length of collection.
       * @param {Object} scope (optional) The scope (<code>this</code> reference)
       * in which the function is executed. Defaults to the current item in the iteration.
       *
       * @since Ext 1
       */
      each : function(fn, scope){
          var items = [].concat(this.items), // each safe for removal
              i = 0,
              len = items.length,
              item;
  
          for (; i < len; i++) {
              item = items[i];
              if (fn.call(scope || item, item, i, len) === false) {
                  break;
              }
          }
      },
  
      /**
       * Executes the specified function once for every key in the collection, passing each
       * key, and its associated item as the first two parameters.
       * @param {Function} fn The function to execute for each item.
       * @param {String} fn.key The key of collection item.
       * @param {Mixed} fn.item The collection item.
       * @param {Number} fn.index The index of item.
       * @param {Number} fn.len Total length of collection.
       * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the
       * function is executed. Defaults to the browser window.
       *
       * @since Ext 1
       */
      eachKey : function(fn, scope){
          var keys = this.keys,
              items = this.items,
              i = 0,
              len = keys.length;
  
          for (; i < len; i++) {
              fn.call(scope || window, keys[i], items[i], i, len);
          }
      },
  
      /**
       * Returns the first item in the collection which elicits a true return value from the
       * passed selection function.
       * @param {Function} fn The selection function to execute for each item.
       * @param {Mixed} fn.item The collection item.
       * @param {String} fn.key The key of collection item.
       * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the
       * function is executed. Defaults to the browser window.
       * @return {Object} The first item in the collection which returned true from the selection
       * function, or null if none was found.
       */
      findBy : function(fn, scope) {
          var keys = this.keys,
              items = this.items,
              i = 0,
              len = items.length;
  
          for (; i < len; i++) {
              if (fn.call(scope || window, items[i], keys[i])) {
                  return items[i];
              }
          }
          return null;
      },
  
      //<deprecated since="0.99">
      /**
       * Returns the first item in the collection which elicits a true return value from the passed selection function.
       * @deprecated 4.0 Use {@link #findBy} instead.
       * @since Ext 1
       */
      find : function() {
          if (Ext.isDefined(Ext.global.console)) {
              Ext.global.console.warn('Ext.util.MixedCollection: find has been deprecated. Use findBy instead.');
          }
          return this.findBy.apply(this, arguments);
      },
      //</deprecated>
  
      /**
       * Inserts an item at the specified index in the collection. Fires the {@link #event-add} event when complete.
       * @param {Number} index The index to insert the item at.
       * @param {String} key The key to associate with the new item, or the item itself.
       * @param {Object} o (optional) If the second parameter was a key, the new item.
       * @return {Object} The item inserted.
       * @since Ext 1
       */
      insert : function(index, key, obj){
          var me = this,
              myKey = key,
              myObj = obj;
  
          if (arguments.length == 2) {
              myObj = myKey;
              myKey = me.getKey(myObj);
          }
          if (me.containsKey(myKey)) {
              me.suspendEvents();
              me.removeAtKey(myKey);
              me.resumeEvents();
          }
          if (index >= me.length) {
              return me.add(myKey, myObj);
          }
          me.generation++;
          me.length++;
          Ext.Array.splice(me.items, index, 0, myObj);
          if (typeof myKey != 'undefined' && myKey !== null) {
              me.map[myKey] = myObj;
          }
          Ext.Array.splice(me.keys, index, 0, myKey);
          if (me.hasListeners.add) {
              me.fireEvent('add', index, myObj, myKey);
          }
          return myObj;
      },
  
      /**
       * Remove an item from the collection.
       * @param {Object} o The item to remove.
       * @return {Object} The item removed or false if no item was removed.
       * @since Ext 1
       */
      remove : function(o) {
          this.generation++;
          return this.removeAt(this.indexOf(o));
      },
  
      /**
       * Remove all items in the passed array from the collection.
       * @param {Array} items An array of items to be removed.
       * @return {Ext.util.MixedCollection} this object
       */
      removeAll : function(items) {
          items = [].concat(items);
          var i, iLen = items.length;
          for (i = 0; i < iLen; i++) {
              this.remove(items[i]);
          }
  
          return this;
      },
  
      /**
       * Remove an item from a specified index in the collection. Fires the {@link #event-remove} event when complete.
       * @param {Number} index The index within the collection of the item to remove.
       * @return {Object} The item removed or false if no item was removed.
       * @since Ext 1
       */
      removeAt : function(index) {
          var me = this,
              o,
              key;
  
          if (index < me.length && index >= 0) {
              me.length--;
              o = me.items[index];
              Ext.Array.erase(me.items, index, 1);
              key = me.keys[index];
              if (typeof key != 'undefined') {
                  delete me.map[key];
              }
              Ext.Array.erase(me.keys, index, 1);
              if (me.hasListeners.remove) {
                  me.fireEvent('remove', o, key);
              }
              me.generation++;
              return o;
          }
          return false;
      },
  
      /**
       * Removed an item associated with the passed key fom the collection.
       * @param {String} key The key of the item to remove.
       * @return {Object} The item removed or false if no item was removed.
       */
      removeAtKey : function(key){
          return this.removeAt(this.indexOfKey(key));
      },
  
      /**
       * Returns the number of items in the collection.
       * @return {Number} the number of items in the collection.
       * @since Ext 1
       */
      getCount : function(){
          return this.length;
      },
  
      /**
       * Returns index within the collection of the passed Object.
       * @param {Object} o The item to find the index of.
       * @return {Number} index of the item. Returns -1 if not found.
       * @since Ext 1
       */
      indexOf : function(o){
          return Ext.Array.indexOf(this.items, o);
      },
  
      /**
       * Returns index within the collection of the passed key.
       * @param {String} key The key to find the index of.
       * @return {Number} index of the key.
       * @since Ext 1
       */
      indexOfKey : function(key){
          return Ext.Array.indexOf(this.keys, key);
      },
  
      /**
       * Returns the item associated with the passed key OR index.
       * Key has priority over index.  This is the equivalent
       * of calling {@link #getByKey} first, then if nothing matched calling {@link #getAt}.
       * @param {String/Number} key The key or index of the item.
       * @return {Object} If the item is found, returns the item.  If the item was not found, returns <code>undefined</code>.
       * If an item was found, but is a Class, returns <code>null</code>.
       * @since Ext 1
       */
      get : function(key) {
          var me = this,
              mk = me.map[key],
              item = mk !== undefined ? mk : (typeof key == 'number') ? me.items[key] : undefined;
          return typeof item != 'function' || me.allowFunctions ? item : null; // for prototype!
      },
  
      /**
       * Returns the item at the specified index.
       * @param {Number} index The index of the item.
       * @return {Object} The item at the specified index.
       */
      getAt : function(index) {
          return this.items[index];
      },
  
      /**
       * Returns the item associated with the passed key.
       * @param {String/Number} key The key of the item.
       * @return {Object} The item associated with the passed key.
       */
      getByKey : function(key) {
          return this.map[key];
      },
  
      /**
       * Returns true if the collection contains the passed Object as an item.
       * @param {Object} o  The Object to look for in the collection.
       * @return {Boolean} True if the collection contains the Object as an item.
       * @since Ext 1
       */
      contains : function(o){
          return typeof this.map[this.getKey(o)] != 'undefined';
      },
  
      /**
       * Returns true if the collection contains the passed Object as a key.
       * @param {String} key The key to look for in the collection.
       * @return {Boolean} True if the collection contains the Object as a key.
       * @since Ext 1
       */
      containsKey : function(key){
          return typeof this.map[key] != 'undefined';
      },
  
      /**
       * Removes all items from the collection.  Fires the {@link #event-clear} event when complete.
       * @since Ext 1
       */
      clear : function(){
          var me = this;
  
          me.length = 0;
          me.items = [];
          me.keys = [];
          me.map = {};
          me.generation++;
          if (me.hasListeners.clear) {
              me.fireEvent('clear');
          }
      },
  
      /**
       * Returns the first item in the collection.
       * @return {Object} the first item in the collection..
       * @since Ext 1
       */
      first : function() {
          return this.items[0];
      },
  
      /**
       * Returns the last item in the collection.
       * @return {Object} the last item in the collection..
       * @since Ext 1
       */
      last : function() {
          return this.items[this.length - 1];
      },
  
      /**
       * Collects all of the values of the given property and returns their sum
       * @param {String} property The property to sum by
       * @param {String} [root] 'root' property to extract the first argument from. This is used mainly when
       * summing fields in records, where the fields are all stored inside the 'data' object
       * @param {Number} [start=0] The record index to start at
       * @param {Number} [end=-1] The record index to end at
       * @return {Number} The total
       */
      sum: function(property, root, start, end) {
          var values = this.extractValues(property, root),
              length = values.length,
              sum    = 0,
              i;
  
          start = start || 0;
          end   = (end || end === 0) ? end : length - 1;
  
          for (i = start; i <= end; i++) {
              sum += values[i];
          }
  
          return sum;
      },
  
      /**
       * Collects unique values of a particular property in this MixedCollection
       * @param {String} property The property to collect on
       * @param {String} root (optional) 'root' property to extract the first argument from. This is used mainly when
       * summing fields in records, where the fields are all stored inside the 'data' object
       * @param {Boolean} allowBlank (optional) Pass true to allow null, undefined or empty string values
       * @return {Array} The unique values
       */
      collect: function(property, root, allowNull) {
          var values = this.extractValues(property, root),
              length = values.length,
              hits   = {},
              unique = [],
              value, strValue, i;
  
          for (i = 0; i < length; i++) {
              value = values[i];
              strValue = String(value);
  
              if ((allowNull || !Ext.isEmpty(value)) && !hits[strValue]) {
                  hits[strValue] = true;
                  unique.push(value);
              }
          }
  
          return unique;
      },
  
      /**
       * @private
       * Extracts all of the given property values from the items in the MC. Mainly used as a supporting method for
       * functions like sum and collect.
       * @param {String} property The property to extract
       * @param {String} root (optional) 'root' property to extract the first argument from. This is used mainly when
       * extracting field data from Model instances, where the fields are stored inside the 'data' object
       * @return {Array} The extracted values
       */
      extractValues: function(property, root) {
          var values = this.items;
  
          if (root) {
              values = Ext.Array.pluck(values, root);
          }
  
          return Ext.Array.pluck(values, property);
      },
  
      /**
       * Returns a range of items in this collection
       * @param {Number} startIndex (optional) The starting index. Defaults to 0.
       * @param {Number} endIndex (optional) The ending index. Defaults to the last item.
       * @return {Array} An array of items
       * @since Ext 1
       */
      getRange : function(start, end){
          var me = this,
              items = me.items,
              range = [],
              i;
  
          if (items.length < 1) {
              return range;
          }
  
          start = start || 0;
          end = Math.min(typeof end == 'undefined' ? me.length - 1 : end, me.length - 1);
          if (start <= end) {
              for (i = start; i <= end; i++) {
                  range[range.length] = items[i];
              }
          } else {
              for (i = start; i >= end; i--) {
                  range[range.length] = items[i];
              }
          }
          return range;
      },
  
      /**
       * <p>Filters the objects in this collection by a set of {@link Ext.util.Filter Filter}s, or by a single
       * property/value pair with optional parameters for substring matching and case sensitivity. See
       * {@link Ext.util.Filter Filter} for an example of using Filter objects (preferred). Alternatively,
       * MixedCollection can be easily filtered by property like this:</p>
  <pre><code>
  //create a simple store with a few people defined
  var people = new Ext.util.MixedCollection();
  people.addAll([
      {id: 1, age: 25, name: 'Ed'},
      {id: 2, age: 24, name: 'Tommy'},
      {id: 3, age: 24, name: 'Arne'},
      {id: 4, age: 26, name: 'Aaron'}
  ]);
  
  //a new MixedCollection containing only the items where age == 24
  var middleAged = people.filter('age', 24);
  </code></pre>
       *
       *
       * @param {Ext.util.Filter[]/String} property A property on your objects, or an array of {@link Ext.util.Filter Filter} objects
       * @param {String/RegExp} value Either string that the property values
       * should start with or a RegExp to test against the property
       * @param {Boolean} [anyMatch=false] True to match any part of the string, not just the beginning
       * @param {Boolean} [caseSensitive=false] True for case sensitive comparison.
       * @return {Ext.util.MixedCollection} The new filtered collection
       * @since Ext 1
       */
      filter : function(property, value, anyMatch, caseSensitive) {
          var filters = [];
  
          //support for the simple case of filtering by property/value
          if (Ext.isString(property)) {
              filters.push(new Ext.util.Filter({
                  property     : property,
                  value        : value,
                  anyMatch     : anyMatch,
                  caseSensitive: caseSensitive
              }));
          } else if (Ext.isArray(property) || property instanceof Ext.util.Filter) {
              filters = filters.concat(property);
          }
  
          // At this point we have an array of zero or more Ext.util.Filter objects to filter with,
          // so here we construct a function that combines these filters by ANDing them together
          // and filter by that.
          return this.filterBy(Ext.util.Filter.createFilterFn(filters));
      },
  
      /**
       * Filter by a function. Returns a <i>new</i> collection that has been filtered.
       * The passed function will be called with each object in the collection.
       * If the function returns true, the value is included otherwise it is filtered.
       * @param {Function} fn The function to be called.
       * @param {Mixed} fn.item The collection item.
       * @param {String} fn.key The key of collection item.
       * @param {Object} scope (optional) The scope (<code>this</code> reference) in
       * which the function is executed. Defaults to this MixedCollection.
       * @return {Ext.util.MixedCollection} The new filtered collection
       * @since Ext 1
       */
      filterBy : function(fn, scope) {
          var me = this,
              newMC  = new this.self(),
              keys   = me.keys,
              items  = me.items,
              length = items.length,
              i;
  
          newMC.getKey = me.getKey;
  
          for (i = 0; i < length; i++) {
              if (fn.call(scope || me, items[i], keys[i])) {
                  newMC.add(keys[i], items[i]);
              }
          }
  
          return newMC;
      },
  
      /**
       * Finds the index of the first matching object in this collection by a specific property/value.
       * @param {String} property The name of a property on your objects.
       * @param {String/RegExp} value A string that the property values
       * should start with or a RegExp to test against the property.
       * @param {Number} [start=0] The index to start searching at.
       * @param {Boolean} [anyMatch=false] True to match any part of the string, not just the beginning.
       * @param {Boolean} [caseSensitive=false] True for case sensitive comparison.
       * @return {Number} The matched index or -1
       * @since Ext 2
       */
      findIndex : function(property, value, start, anyMatch, caseSensitive){
          if(Ext.isEmpty(value, false)){
              return -1;
          }
          value = this.createValueMatcher(value, anyMatch, caseSensitive);
          return this.findIndexBy(function(o){
              return o && value.test(o[property]);
          }, null, start);
      },
  
      /**
       * Find the index of the first matching object in this collection by a function.
       * If the function returns <i>true</i> it is considered a match.
       * @param {Function} fn The function to be called.
       * @param {Mixed} fn.item The collection item.
       * @param {String} fn.key The key of collection item.
       * @param {Object} [scope] The scope (<code>this</code> reference) in which the function is executed. Defaults to this MixedCollection.
       * @param {Number} [start=0] The index to start searching at.
       * @return {Number} The matched index or -1
       * @since Ext 2
       */
      findIndexBy : function(fn, scope, start){
          var me = this,
              keys = me.keys,
              items = me.items,
              i = start || 0,
              len = items.length;
  
          for (; i < len; i++) {
              if (fn.call(scope || me, items[i], keys[i])) {
                  return i;
              }
          }
          return -1;
      },
  
      /**
       * Returns a regular expression based on the given value and matching options. This is used internally for finding and filtering,
       * and by Ext.data.Store#filter
       * @private
       * @param {String} value The value to create the regex for. This is escaped using Ext.escapeRe
       * @param {Boolean} anyMatch True to allow any match - no regex start/end line anchors will be added. Defaults to false
       * @param {Boolean} caseSensitive True to make the regex case sensitive (adds 'i' switch to regex). Defaults to false.
       * @param {Boolean} exactMatch True to force exact match (^ and $ characters added to the regex). Defaults to false. Ignored if anyMatch is true.
       * @since Ext 3
       */
      createValueMatcher : function(value, anyMatch, caseSensitive, exactMatch) {
          if (!value.exec) { // not a regex
              var er = Ext.String.escapeRegex;
              value = String(value);
  
              if (anyMatch === true) {
                  value = er(value);
              } else {
                  value = '^' + er(value);
                  if (exactMatch === true) {
                      value += '$';
                  }
              }
              value = new RegExp(value, caseSensitive ? '' : 'i');
          }
          return value;
      },
  
      /**
       * Creates a shallow copy of this collection
       * @return {Ext.util.MixedCollection}
       * @since Ext 1
       */
      clone : function() {
          var me = this,
              copy = new this.self(),
              keys = me.keys,
              items = me.items,
              i = 0,
              len = items.length;
  
          for(; i < len; i++){
              copy.add(keys[i], items[i]);
          }
          copy.getKey = me.getKey;
          return copy;
      }
  });
  