Set
Set的成员惟一
const set = new Set([1,2,4,6,4,1,2,4])set.add("ff")数组去重
const arr = [2,5,5,5,1,12,31,1,2][...new Set(arr)]Array.from(arr)- add
- clear
- delete
- has
- values
- keys
- entries (数组键值)
- forEach
WeakSet
只能接管援用类型
Set的成员惟一
const set = new Set([1,2,4,6,4,1,2,4])set.add("ff")数组去重
const arr = [2,5,5,5,1,12,31,1,2][...new Set(arr)]Array.from(arr)只能接管援用类型