数组乱序-洗牌算法

http://www.conardli.top/docs/JavaScript/数组乱序-洗牌算法.html (opens new window)

从最后一个元素开始，从数组中随机选出一个位置，交换，直到第一个元素。

    function disorder(array) {
      const length = array.length;
      let current = length - 1;
      let random;
      while (current >-1) {
        random = Math.floor(length * Math.random());
        [array[current], array[random]] = [array[random], array[current]];
        current--;
      }
      return array;
    }