创建一个具有随机值的数组 [英] Create an array with random values

问题描述

如何创建一个包含40个元素的数组，其随机值介于0到39之间? 喜欢

How can I create an array with 40 elements, with random values from 0 to 39 ? Like

[4, 23, 7, 39, 19, 0, 9, 14, ...]

我尝试使用此处的解决方案:

I tried using solutions from here:

http://freewebdesigntutorials.com/javaScriptTutorials/jsArrayObject/randomizeArrayElements.htm

但是我得到的数组很少是随机的.它会生成很多连续数字的块...

but the array I get is very little randomized. It generates a lot of blocks of successive numbers...

推荐答案

这是一种解决方案，可对唯一的数字列表进行混洗(永远不会重复).

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);

如果要允许重复的值(这不是OP想要的值)，则在其他位置查找. :)

If you want to allow repeated values (which is not what the OP wanted) then look elsewhere. :)

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