随机化无序列表 [英] Randomize a unordered list

问题描述

可能重复：

javascript - 随机HTML列表元素顺序

之后一点帮助。经过一些非常简单的事情，但似乎无法找到自己做的方法。

After a little bit of help. After something quite simple, but can't seem to find a way of doing it myself.

我有一个动态无序列表是从一些后端代码生成的， （不在我的控制之下）。该列表可以是9个标签到100多个标签之间的任何内容。它们按照后端代码定义的顺序返回。使用jQuery / javascript我希望能够随机化li标签的顺序而不重复它们。

I've got a dynamic unordered list being generated from some back end code, (not under my control). The list can be anything from 9 tags up to 100+. They are returned in an order, as defined by the backend code. Using jQuery/javascript I would like to be able to randomize the order of the li tags without having any of them repeat.

我的列表目前看起来像这样：

My my list would currently look something like this:

<ul id="myList">
  <li>Item 1</li>
  <li>Item 2</li>
  <li>Item 3</li>
  <li>Item 4</li>
  <li>Item 5</li>
  <li>Item 6</li>
  <li>Item 7</li>
  <li>Item 8</li>
  <li>Item 9</li>
</ul>

推荐答案

你想要做的就是< a href =http://forum.jquery.com/topic/random-order-of-elements> jQuery论坛。

$(document).ready(function(){
      $('ul').each(function(){
            // get current ul
            var $ul = $(this);
            // get array of list items in current ul
            var $liArr = $ul.children('li');
            // sort array of list items in current ul randomly
            $liArr.sort(function(a,b){
                  // Get a random number between 0 and 10
                  var temp = parseInt( Math.random()*10 );
                  // Get 1 or 0, whether temp is odd or even
                  var isOddOrEven = temp%2;
                  // Get +1 or -1, whether temp greater or smaller than 5
                  var isPosOrNeg = temp>5 ? 1 : -1;
                  // Return -1, 0, or +1
                  return( isOddOrEven*isPosOrNeg );
            })
            // append list items to ul
            .appendTo($ul);            
      });
});

示例： http ：//jsbin.com/upuju3/2

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