Ext.each怎么用

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文章转载于： Ext.each的用法 http://www.studyofnet.com/news/152.html

语法：

each( Array/NodeList/Mixed array, Function fn, Object scope)

Ext.each 的用法与 JQuery.each 类似，不同之处在于Ext.each的第三个参数可以指定回调函数的执行上下文。

Extjs中对Ext.each的定义的源码：

each : function(array, fn, scope){if(Ext.isEmpty(array, true)){return;}if(!Ext.isIterable(array) || Ext.isPrimitive(array)){array = [array];}for(var i = 0, len = array.length; i < len; i++){if(fn.call(scope || array[i], array[i], i, array) === false){//3等号return i;};}}

关于 Ext.each的几个实例：

  var people = ['Bill', 'Saul', 'Gaius']; //using each to detect Cylons: var f=function (person, index){    var cylon = (index + 1) % 2 == 0; //every second man is a toaster    alert(person + (cylon ? ' is ' : ' is not ') + 'a fraking cylon');}Ext.each(people,f);

//JS数组Ext.each([1,0,3,4,5,6,8],function(item){alert(item)}); //JS数组里JSON对象Ext.each([{name:"cola",age:27},{name:"moka",age:28}],function(item){alert(item.name)});