Open ziwei3749 opened 6 years ago
var arr = [1,2,3,3,4,2,1] var newArr = [...new Set(arr)]
var arr = [1,2,3,3,4,2,1] var newArr = [] arr.forEach(item => { if(newArr.indexOf(item) == -1){ newArr.push(item) } })
注意遍历length较长的那个数组
var arr1 = [1,2,3,4] var arr2 = [1,2,3,4,5,6] var newArr = [] arr2.forEach(item => { if(arr1.indexOf(item) == -1){ newArr.push(item) } })
数组去重
数组去重的ES6版本
数组去重的indexOf版本
2个数组,可以通过indexOf去重