each

原文： http://cpp.ezbty.org/content/science_doc/c%E6%A0%87%E5%87%86%E5%BA%93%EF%BC%9A%E4%BD%BF%E7%94%A8_stdfor_each 我们先来看看std::for_each最简单和直接的用法，接着关注一下std::for_each更多创造性的用法。这个简单而直接的例子首先定义一个函数对象类型，然后调用std::for_each对一个迭代器组进行遍历操作。 #include<algorithm> #include<vector> //新建一个函数对象的类型，它有一个定义好的函数操作符 struct OP { OP ( ) : s ( 0 ) { } void operator ( ) ( int & v ) { v = s ++ ; } private : int s ; } ; //初始化一个向量，它有10个整数 std :: vector < int > vec ( 10 ) ; //把向量10个整数分别设置从 0-9 std :: for_each ( vec. begin ( ) , vec. end ( ) , OP ( ) ) ; 看了这个代码大家自然地产生了一个疑问，就是只是把向量里10元素设置一下值，为什么为直接使用一个for循环，而要如此费力地使用for_each

Let me explain my code a little bit (Excuse me if somethings wrong, I've just written this example from scratch, it is very close to what I currently have). HTML: <form id="form"> <!-- Friend 1 --> Name 1: <input type="text" name="friendName1" id="friendName1" class="friendName" value=""><br /> Email 1: <input type="text" name="friendEmail1" id="friendEmail1" value=""><br /><br /> <!-- Friend 2 --> Name 2:<input type="text" name="friendName2" id="friendName2" class="friendName" value=""><br /> Email 2:<input type="text" name="friendEmail2" id="friendEmail2" value=""><br /><br /> <!-- Friend 3

I'm grabbing an array of jQuery objects and then via .each() modifying each individual jquery with in the array. In this case I'm updated the class names to trigger a -webkit-transition-property to utilize a css transition. I'd like there to be a pause before each css transition begins. I'm using the following, but there is no delay in between each update. Instead, they all appear to be updating at once. function positionCards() { $cards = $('#gameboard .card'); $cards.each(function() { setTimeout( function(){ addPositioningClass($(this)); }, 500 ) }); } function addPositioningClasses($card){

In jQuery, is it possible to invoke a callback or trigger an event after an invocation of .each() (or any other type of iterative callback) has completed . For example, I would like this "fade and remove" to complete $(parentSelect).nextAll().fadeOut(200, function() { $(this).remove(); }); before doing some calculations and inserting new elements after the $(parentSelect) . My calculations are incorrect if the existing elements are still visible to jQuery and sleeping/delaying some arbitrary amount of time (200 for each element) seems like a brittle solution at best. I can easily .bind() the