json中添加json操作

gistfile1.txt

var json_in_json =  {};

var user1 = {"_id":"1","name":"LincolnBurrows","age":"26","sex":"male"};
var user2 = {"_id":"2","name":"yangdong","age":"20","sex":"male"};
var user3 = {"_id":"3","name":"jingjing","age":"19","sex":"female"};

json_in_json[user1._id] = user1;
json_in_json[user2._id] = user2;
json_in_json[user3._id] = user3;
console.log(json_in_json);

if(json_in_json[user1._id]!=undefined)
	console.log(json_in_json[user1._id]);
//or
if(!(user1._id in json_in_json))
	console.log(json_in_json[user1._id]);
//or
if(json_in_json.hasOwnProperty(user1._id))
	console.log(json_in_json[user1._id]);
//删除
delete json_in_json[user1._id]
	console.log(json_in_json);