利用es6语法实现最简单的数组去重方法

es6语法中有哪些简单的去重方法，下面web建站小编给大家详细介绍一下3种很简单的方法，具体代码如下：

1、利用new Set去重

const arr = [1,2,3,5,6,8,9,1,2,2,3,3,4,4,5,5];
const setData = Array.from(new Set(arr));
console.log(setData); //(8) [1, 2, 3, 5, 6, 8, 9, 4]

2、利用includes去重

const handleDuplicate = (arr) => {
  let repeatArr = [];
  for (let i = 0,len = arr.length ; i < len; i++)
    if (!repeatArr.includes(arr[i])) repeatArr.push(arr[i])
  return repeatArr;
}

const arr = [1,2,3,5,6,8,9,1,2,2,3,3,4,4,5,5];
console.log(handleDuplicate(arr)) //(8) [1, 2, 3, 5, 6, 8, 9, 4]

3、利用filter去重

const arr = [1,2,3,5,6,8,9,1,2,2,3,3,4,4,5,5];
const handleDuplicate = (arr) => arr.filter((item,index) => arr.indexOf(item,0) === index);
console.log(handleDuplicate(arr)) //(8) [1, 2, 3, 5, 6, 8, 9, 4]