新手提问如何把 var arr = ["1","2"]转成 var arr= {"1","2"}

Question

刚学js不太懂

Answer 1

字面意思，数组类型转化为集合类型。代码如下

var arr=["1","2"]
var b = new Set(arr)
console.log(b)
// Set(2) {"1", "2"}