将一个数组内元素的顺序打乱

1 var arr:Array = [1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6]
2 disorder(arr);
3 trace(arr)
4
5 function disorder(arr:Array):Array
6 {
7 var len:uint = arr.length;
8 var cache:*, ti:uint;
9 //将i位置于随即的ti位置互换
10 for (var i:uint = 0; i < len; i++)
11 {
12 ti = int(Math.random() * len);
13 cache = arr[i];
14 arr[i] = arr[ti];
15 arr[ti] = cache;
16 }
17 while (--i >= 0)
18 {
19 ti = int(Math.random() * len);
20 cache = arr[i];
21 arr[i] = arr[ti];
22 arr[ti] = cache;
23 }
24 return arr;
25 }