建立在JavaScript中随机值的数组 [英] create a array with random values in javascript
问题描述
我怎样才能创建具有40元素的数组,随机值从0到39?
像 [4,23,7,39,19,0,9,14 ...]
How can I create a array with 40 elements, with random values from 0 to 39 ?
Like [4, 23, 7, 39, 19, 0, 9, 14 ...]
我尝试使用的解决方案从这里:
I tried using solutions from here:
<一个href=\"http://freewebdesigntutorials.com/javaScriptTutorials/jsArrayObject/randomizeArrayElements.htm\">http://freewebdesigntutorials.com/javaScriptTutorials/jsArrayObject/randomizeArrayElements.htm
但阵列我得到的是非常小的随机。它会产生大量的连续数块...
but the array I get is very little randomized. It generates a lot of blocks of successive numbers...
推荐答案
下面是一个洗牌的列表的解决方案的唯一的数字(不重复,永远)。
Here's a solution that shuffles a list of unique numbers (no repeats, ever).
for (var a=[],i=0;i<40;++i) a[i]=i;
// http://stackoverflow.com/questions/962802#962890
function shuffle(array) {
var tmp, current, top = array.length;
if(top) while(--top) {
current = Math.floor(Math.random() * (top + 1));
tmp = array[current];
array[current] = array[top];
array[top] = tmp;
}
return array;
}
a = shuffle(a);
如果你想允许重复值(这也不是什么OP想),然后看看其他地方。 :)
If you want to allow repeated values (which is not what the OP wanted) then look elsewhere. :)
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