Question

目标是在房间中列出用户，因此房间可以包含许多用户，并且应该可以轻松检索：

前：

user1 = {"username":"john","sex":"male"};
user2 = {"username":"robert","sex":"male"};
user3 = {"username":"isac","sex":"male"};

rooms["room1"].push(user1);
rooms["room1"].push(user2);
rooms["room2"].push(user3);

然后

return rooms["room1"];

应该返回

{"username":"john","sex":"male"};
{"username":"robert","sex":"male"};

当然rooms[roomName].push(user2);不好

关于如何实现这一点的任何想法？

Answer 1

var roomsMap = {
    room1: [],
    room2: [],
    room3: []
};

roomsMap.room1.push(user1);

或者如果您需要密钥是动态的：

roomsMap[roomKey].push(someUser);

编辑：

差不多好。但如何使房间地图动态，而不是仅限于room1，room2，room3？

您可以通过这种方式动态添加新密钥/数组到roomsMap。

(roomsMap[roomKey] = roomsMap[roomKey] || []).push(user1);

完整示例：

var roomsMap = {},
    user1 = {"username":"john","sex":"male"},
    roomKey = 'room1';

(roomsMap[roomKey] = roomsMap[roomKey] || []).push(user1);

console.log(roomsMap[roomKey]); //[Object { username="john", sex="male"}]

如何在JavaScript中使用关联数组来检索用户？

1 个答案: