Javascript create object with data structure like this

Question

I would like to create an object with a similar data structure if possible. Must I create a new object for every player? Could somebody tell me how?

players
players.name='John'

players.John.age='12'
players.John.adress='London ..'
players.John.telnumber='09876587655'

edit1

Sorry I know this is the basic. I just ask one more question an them i will try learn better javascript. I need to pass data stored in "event" to object."event".id (to be like players.John.id instead players.event.id) Sorry for my bad english.

// in app.js
var fs = require('fs');
var socketio = require('socket.io');
Tail = require('tail').Tail;
var express = require('express');
var http = require('http');
var colors = require('colors');
var app = express()
  , server = require('http').createServer(app)
  , io = socketio.listen(server);             // socket needs to listen on http server

server.listen(9099);



app.use(express.static(__dirname + '/public'));

var port = process.env.PORT || 3000;

app.listen(port, function() {
    console.log('\r\n');
    console.log("Express listening on port " + port +'.'.green);
});

// Routing
//app.use(express.static(__dirname));

// usernames which are currently connected to the chat
//var players = [];
var players = {};


io.sockets.on('connection', function(socket) {
    // do all of your socket work in here
    console.log('\r\n');
    console.log("Connection".green);

    var sessionid = socket.id;
    console.log(sessionid);

    // Success!  Now listen to messages to be received
    socket.on('message',function(event){ 
        console.log('Received message:',event);
    });

    socket.on('add user',function(event){ 
        console.log('New User:',event);
        // we store the username in the socket session for this client

        socket.username = event;
        // add the client's username to the global list
        players.event = {};
        players.event.id = sessionid;
        //players.John.foo = "yeah"
        //players.John.name = "John"
        console.log(players);

        socket.emit('login', {});
        // echo globally (all clients) that a person has connected

        socket.broadcast.emit('user joined', {
            username: socket.username
        });
    });

    //socket.emit('start', 'newround');     
});

edit2

Got it working.

// in app.js
var fs = require('fs');
var socketio = require('socket.io');
Tail = require('tail').Tail;
var express = require('express');
var http = require('http');
var colors = require('colors');
var app = express()
  , server = require('http').createServer(app)
  , io = socketio.listen(server);             // socket needs to listen on http server

server.listen(9099);

app.use(express.static(__dirname + '/public'));

var port = process.env.PORT || 3000;

app.listen(port, function() {
    console.log('\r\n');
    console.log("Express listening on port " + port +'.'.green);
});

// Routing
//app.use(express.static(__dirname));

// usernames which are currently connected to the chat
//var players = [];
var players = {};

io.sockets.on('connection', function(socket) {
    // do all of your socket work in here
    console.log('\r\n');
    console.log("Connection".green);
    var sessionid = socket.id;
    console.log(sessionid);

    // Success!  Now listen to messages to be received
    socket.on('message',function(event){ 
        console.log('Received message:',event);
    });

    socket.on('add user',function(event){ 
        console.log('New User:',event);
        // we store the username in the socket session for this client

        socket.username = event;
        // add the client's username to the global list
        players[event] = {};
        players[event].id = sessionid;
        //players.John.foo = "yeah"
        //players.John.name = "John"
        console.log(players);

        socket.emit('login', {});

        // echo globally (all clients) that a person has connected
        socket.broadcast.emit('user joined', {
            username: socket.username
        });
    });

    //socket.emit('start', 'newround');
});

Depending on visibility requirements you might want to have the first line as var players;, otherwise you have a valid JS code that creates a single object and initializes its properties. — PM 77-1
– PM 77-1, Commented Jun 17, 2014 at 18:48

Paul Roub · Accepted Answer · 2014-06-17 18:50:49Z

5

You're looking for a players object, with individual players referenced by name. So:

var players = {};
players['John'] = {  
  'age' = 12,
  'address' = 'London...',
  'telnumber' = '09876587655'
};

You can also access "John" as players.John, but that gets tricky if any of the names contain spaces, etc.

Similarly, the player attributes can be accessed either via:

players.John['age'] = 13;

or

players.John.age = 13;

answered Jun 17, 2014 at 18:50

Paul Roub

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3 Comments

Brad Over a year ago

Just remember that keys have to be unique. This method only works for a short lucky while until you have two players named John. It doesn't make sense to assign players as an object like this. Use a plan old array, and have a name property of each.

Paul Roub Over a year ago

Unless you want to do something crazy like "look up a player by name". But yes, ensuring unique names matters.

Brad Over a year ago

Looking up a player by name is quite easy by looping through. If that's inefficient, then a proper search tree can be implemented or let a database engine deal with it for you.

Hasan Savran · Accepted Answer · 2014-06-17 18:52:52Z

3

var name = "John";
var players = {};
players[name] = {};
players[name].age = '12';
players[name].address = "address";
players[name].telnumber = "tel";

answered Jun 17, 2014 at 18:52

Hasan Savran

3932 silver badges5 bronze badges

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