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随机数（洗牌算法） #70

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Liqiuyue9597 opened this issue Sep 28, 2020 · 1 comment

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Algorithm 字节跳动

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Liqiuyue9597 commented Sep 28, 2020

将一个有序的数组打乱，要求随机。

Liqiuyue9597 added 字节跳动 Algorithm labels

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Liqiuyue9597 commented Sep 28, 2020

function shuffle(arr) {
  let len = arr.length;
  let index;
  while (len > 0) {
    index = Math.floor(Math.random() * len); 
    len--;
    [arr[len], arr[index]] = [arr[index], arr[len]];
  }
  return arr;
}

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