酷炫的程序猿

摘要： let s = new Set(); s .add("x") .add("y"); console.log(s); var a =[]; a.push(1,2,3,4,5,4,3,2,1); var user = new Set(a); console.log(user); 数组转set var a 阅读全文

摘要： let map = new Map([ ["a","b"], ["c","d"] ]); for (let i of map.keys()){//循环map中的键名 console.log(i) } let map = new Map([ ["a","b"], ["c","d"] ]); for ( 阅读全文