dojo 对Javascript1.6 的数组操作功能进行了拓展：

• ()
• (arr, callback, thisObject) Determines whether or not every item in arr satisfies the condition implemented by callback.
• (arr, callback, thisObject) Returns a new Array with those items from arr that match the condition implemented by callback.
• (arr, callback, thisObject) for every item in arr, callback is invoked.
• (arr, value, fromIndex, findLast) locates the first index of the provided value in the passed array.
• (arr, value, fromIndex) locates the last index of the provided value in the passed array.
• (arr, callback, thisObject, Ctr) applies callback to each element of arr and returns an Array with the results
• (arr, callback, thisObject) Determines whether or not any item in arr satisfies the condition implemented by callback.

 

1.every(arr,callback,thisObject);   校验是否数组arr内的所有元素都满足回调函数的条件，是返回true

Parameter	Type	Description
arr	Array | String	用来迭代的数组. 如果是string，则对string的没资格字符操作
callback	Function | String	回调函数被触发，三个参数: item, index, and array ，如果条件满足，返回为true
thisObject	Object	可选 可能作为回调函数的作用域

// returns falsearray.every([1, 2, 3, 4], function(item){ return item>1; });// returns truearray.every([1, 2, 3, 4], function(item){ return item>0; });

 

2.(arr, callback, thisObject) ; 返回一个满足过滤条件元素组成的数组

Parameter	Type	Description
arr	Array	the array to iterate over.
callback	Function | String	a function that is invoked with three arguments (item, index, array). The return of this function is expected to be a boolean which determines whether the passed-in item will be included in the returned array.
thisObject	Object	Optional may be used to scope the call to callback

// Example// returns [2, 3, 4]array.filter([1, 2, 3, 4], function(item){ return item>1; });

 

3.(arr, callback, thisObject) 对arr 的每一个元素，触发回调函数

// log out all members of the array:array.forEach([ "thinger", "blah", "howdy", 10 ],function(item){console.log(item);});// log out the members and their indexesarray.forEach([ "thinger", "blah", "howdy", 10 ],function(item, idx, arr){console.log(item, "at index:", idx);});// use a scoped object member as the callback var obj = {prefix: "logged via obj.callback:",callback: function(item){console.log(this.prefix, item);}};// specifying the scope function executes the callback in that scopearray.forEach([ "thinger", "blah", "howdy", 10 ],obj.callback,obj);

// alternately, we can accomplish the same thing with lang.hitch()array.forEach([ "thinger", "blah", "howdy", 10 ],lang.hitch(obj, "callback"));

 

4.(arr, value, fromIndex, findLast) 从fromIndex 起，返回arr数组中第一次出现value的索引值.

Parameter	Type	Description
arr	Array
value	Object
fromIndex	Integer	Optional
findLast	Boolean	Optional Makes indexOf() work like lastIndexOf(). Used internally; not meant for external usage.

 

5.(arr, callback, thisObject, Ctr) 根据回调函数映射数组值

Parameter	Type	Description
arr	Array | String	the array to iterate on. If a string, operates on individual characters.
callback	Function | String	a function is invoked with three arguments, (item, index, array), and returns a value
thisObject	Object	Optional may be used to scope the call to callback
Ctr	undefined

// returns [2, 3, 4, 5]array.map([1, 2, 3, 4], function(item){ return item+1 });

 

6.(arr, callback, thisObject)  检验数组里是否有满足回调函数条件，有则返回true

Parameter	Type	Description
arr	Array | String	the array to iterate over. If a string, operates on individual characters.
callback	Function | String	a function is invoked with three arguments: item, index, and array and returns true if the condition is met.
thisObject	Object	Optional may be used to scope the call to callback

// is truearray.some([1, 2, 3, 4], function(item){ return item>1; });// is falsearray.some([1, 2, 3, 4], function(item){ return item<1; });