//朋友圈
			var brother = "bob" ;
			var sister = "lisa" ;
			var friend1 = "lihua" ;
			var friend2 = "wh" ;
			var friend3 = "haha" ;
			var mom = "ada" ;
			var dad = "mark" ;
			var grandpa = "xxx" ;
			var grandm = "tyy" ;
			const girl  = "lio";
			var person = {brother,sister,friend1,friend2,friend3,mom,dad,grandpa,grandm,girl}
			console.log(person);//Object {brother: "bob", sister:"lisa",.....}
			//对象创建
			var set = new Set([brother,sister,friend1,friend2,mom,dad,grandpa,grandm,girl]);
			//遍历set
			for(let item of set.entries()){
				console.log(item);
			}
		 	var addp = set.add(friend3);
		 	//console.log(addp);
			set.delete(friend2);

			//利用 map  实现增添改查
			var items = [["brother","bob"],["sister","lisa"],["friend1","lihua"],						["friend2","wh"]] ;
			var m = new Map();
			items.forEach(([key,value])=>m.set(key,value));

			//遍历map
			for(let  key of  m.keys()){
				console.log(key) ;
			}
			for(let value of m.values()){
				console.log(value) ;
			}
			
			//map操作方法增删改查
			m.set(["mom","aaa"]);
			for( let [key,value] of m.entries()){
				console.log(key,value);
			}
			console.log(m.delete("mom")) ;
			for( let [key,value] of m.entries()){
				console.log(key,value);
			}
			
			m.set("friend1","hehe");
			for( let [key,value] of m.entries()){
				console.log(key,value);
			}
			m.set(girl,"sd");
			for( let [key,value] of m.entries()){
				console.log(key,value);
			}