WhoopD的博客

js对数组去重的几种方法（简单易懂） 1. 利用ES6中的set方法 let arr1 = [1, 2, 3, 2, 1, 2, 4, 5, 2, 6, 7, 3, 9] let arr2 = [...new Set(arr1)] //arr2=[1,2,3,4,5,6,7,9] 2. 利用reduce方法 let arr1 = [1, 2, 3, 2, 1, 2, 4, 5, 2, 6, 7, 3, 9] let arr2 = [] let arr3 = arr1.redu