javascript实现数组随机排序和去重

let arr = [‘g‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘a‘, ‘g‘, ‘b‘, ‘c‘];

// 数组随机排序(原数组被修改)Array.prototype.randomSort = function () {  const len = this.length;  for (let i = len - 1; i > 1; i--) {    let n = Math.floor(Math.random() * i);    let lastone = this[i];    this[i] = this[n];    this[n] = lastone;  }};

// 数组去重(返回新数组)Array.prototype.removeDuplicate = function () {  let obj = {};  const len = this.length;  for (let i = 0; i<len; i++) {    if (obj[this[i]]) continue;    obj[this[i]] = this[i];  }  return Object.keys(obj);};

// 用法arr.removeDuplicate();arr.randomSort();

原文地址：https://www.cnblogs.com/qddyh/p/10455575.html