//重复的数据会被删除

let set = new Set([1,1,2,3,4]);

console.log(set)

console.log(set.size)//4

//添加

console.log(set.add(5));//Set(5) {1, 2, 3, 4, 5}

//删除

console.log(set.delete(1));//成功返回true

console.log(set);//Set(4) {2, 3, 4, 5}

//查找数据

console.log(set.has(2));//找到返回true

console.log(set.has('a'));//false

//删除数据

console.log(set.clear());//undefined

console.log(set)//Set(0) {}

var map = new Map([['name','张三'],['age',30],['id',155]]);

console.log(map)//Map(3) {"name" => "张三", "age" => 30, "id" => 155}

/*添加数据*/

console.log(map.set('sex','男'));//Map(4) {"name" => "张三", "age" => 30, "id" => 155, "sex" => "男"}

//删除一条数据

console.log(map.delete('name'));//true

console.log(map);//Map(3) {"age" => 30, "id" => 155, "sex" => "男"}

//获取一条数据

console.log(map.get('age'));//30

//查找一条数据

console.log(map.has('id'));//true

console.log(map.has('name'));//false,前面被删除了