javascript dynamic structure with array or object

Question

Im trying to create a structure with Javascript as follows:

var users = {
    user.id: {
      session.id1: session.id1,
      session.id2: session.id2,
      session.id3: session.id3
    },
    user.id2: {
      session.id1: session.id1,
      session.id2: session.id2,
      session.id3: session.id3
    },
  };

What i need: add new sessions and remove them, removing okay, but how should i define object and how can i push new sessions to user obejct? That's why key is equal to value.

user.id cannot be used due to the .. "user.id" would work though, wrap it up in quotes. — GillesC
– GillesC, Commented Jun 12, 2015 at 10:12
or just use user{ id: { id1: ... , id2: ... } } and id2:{ id1:..., id2: ... } }. You can then adress them as user.id.id1 or user.id2.id1 — Michel
– Michel, Commented Jun 12, 2015 at 10:18
I think its better to create a class and then store this object in a users var — The Reason
– The Reason, Commented Jun 12, 2015 at 10:20
and push() is not available with objects, only with arrays — Michel
– Michel, Commented Jun 12, 2015 at 10:20
wrapping "user.id" in quotes don't take it as value from "user" object and displays it as text. — Gordon Freeman
– Gordon Freeman, Commented Jun 12, 2015 at 10:34

Stefan Dimov · Accepted Answer · 2015-06-12 10:17:14Z

3

If you want to use session.id1 instead of something like sessionId1 :

Assign value:

users['user.id'].['session.id1'] = value;

Create object:

var users = {
    'user.id': {
      'session.id1': session.id1,
      'session.id2': session.id2,
      'session.id3': session.id3
    },
    'user.id2': {
      'session.id1': session.id1,
      'session.id2': session.id2,
      'session.id3': session.id3
    },
  };

But I don't recommend it. If you are the only one who is gonna work with this code, it's ok.

answered Jun 12, 2015 at 10:17

Stefan Dimov

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1 Comment

Gordon Freeman Over a year ago

session.id comes from socket.io in nodejs, also from object. And i would like to use the value in it as my key and also as a value.

Zee · Accepted Answer · 2015-06-12 10:37:19Z

0

You can first create an empty object and fill it as and when the data comes like

users[user.id] = {};

For an example:

var users = {};
var user = {id : 1}; //Data received(Just an example)
users[user.id] = {};
var session = {id1 : 1.1}; //Data received
users[user.id][session.id1] = session.id1;
console.log(JSON.stringify(users));

answered Jun 12, 2015 at 10:37

Zee

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1 Comment

Gordon Freeman Over a year ago

The code im using:

if(!users[user.user_id]) {           users[user.user_id] = {};         }         users[user.user_id][socket.id] = socket.id;

Thanks! You helped a lot!

ManyStylez · Accepted Answer · 2015-06-12 10:47:51Z

0

How about refactoring the user object to store sessions as an array and push, pop and slice them as required.

var users = [
   {
      id:'userid',
      sessions: [
          {
              id: 'sessionid',
              sessiondata: something
          },
          {
              id: 'sessionid',
              sessiondata: something
          }
      ]
 }];

This way to can just use normal array operators on the session array for each user.

edited Jun 12, 2015 at 10:47

answered Jun 12, 2015 at 10:26

ManyStylez

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1 Comment

Gordon Freeman Over a year ago

What do you mean? Can you please provide some code? Thanks!

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