Defining a multidimensional Object in Javascript

Question

I have some data on cars and am trying to create a function where I can get info on a specific car. I can't seem to format my data list correctly. I run it through JSLint and it tells me it is wrong but I don't know how to fix it.

var models = {
  "2009": 
    {Jaguar: [model: "XF", id: "123"], [model: "XK", id: "456"], [model: "XJ", id: "789"]}, 
    {Volvo: [model: "XC70", id: "223"], [model: "V50", id: "256"]}, 
  "2010": 
    {Jaguar: [model: "XF", id: "323"], [model: "XK", id: "356"]}, 
    {Volvo: [model: "XC70", id: "423"], [model: "V50", id: "456"]}
  };
   //**** Show an example model here
    console.log(models.2010.Jaguar[0].model);

`[ ]` is for arrays, which contain just lists of values. `{ }` is for objects, which contain named properties and their values. — Pointy, Jan 05 '16 at 00:27
There are no associative arrays in JavaScript. You'll need to make your arrays objects also. — Donnie D'Amato, Jan 05 '16 at 00:29
Yes @fauxserious, there isn't. But I think it's a fair doubt and I don't see reason for downvote. — Vinícius Fagundes, Jan 05 '16 at 00:37
Sorry @fauxserious, I didn't intend to accuse you. =) I said that because I don't see reason for anyone downvote this question. And if there is a reason, anyone who downvote should at least do a comment about it. — Vinícius Fagundes, Jan 05 '16 at 01:06

Vinícius Fagundes · Accepted Answer · 2016-01-05T00:42:23.307

3

You could change to something like this:

var models = {
    "2009":
            {
                Jaguar: [{model: "XF", id: "123"}, {model: "XK", id: "456"}, {model: "XJ", id: "789"}],
                Volvo: [{model: "XC70", id: "223"}, {model: "V50", id: "256"}]
            },
    "2010":
            {
                Jaguar: [{model: "XF", id: "323"}, {model: "XK", id: "356"}],
                Volvo: [{model: "XC70", id: "423"}, {model: "V50", id: "456"}]
            }
};
//**** Show an example model here
console.log(models['2010'].Jaguar[0].model);

edited Jan 05 '16 at 00:42

answered Jan 05 '16 at 00:33

Vinícius Fagundes

1,983
14
24

`"2009": {Jaguar: ...}, {Volvo: ...}` and `models.2010` are syntax errors. (I will upvote when you correct it.) – Amadan Jan 05 '16 at 00:35
Yes. One moment. It's hard to make a code with this editor. Need more `{`,`}` – Vinícius Fagundes Jan 05 '16 at 00:38
A good way to make sure your code is correct: put it into a REPL. Fortunately, JS runs in a browser, and a JS console is only three keys away. Or you can use jsbin, or jsfiddle, or stackoverflow snippets, or node interactive shell, and copy-paste the correct solution from there. There are sometimes problems where it is not feasible to test the solution; this is not one of them :D – Amadan Jan 05 '16 at 00:41

score 3 · Answer 2 · answered Jan 05 '16 at 00:34

models is correctly an object (indexed by "2009" and "2010").
models["2009"] should be a single object; you can't have two values. {Jaguar:...}, {Volvo:...} is wrong, needs to be {Jaguar: ..., Volvo:}.
Drilling further down, again, Jaguar: ..., ..., ... is wrong - only one value per index. In this case, you want this value to be an array: Jaguar: [..., ..., ...].
Array literals can't have named attributes, so [model: "XF", id: "123"] is incorrect; this should be an object, {model: "XF", id: "123"}.
You can use the dot notation only with identifiers; 2010 is not a valid identifier, so models.2010 is an error. With attributes whose names are not identifiers, you must use the bracket notation: models["2010"].

This is the better answer, in my opinion, I upvoted it. – Vinícius Fagundes Jan 05 '16 at 00:57 — Vinícius Fagundes, Jan 05 '16 at 00:57

Eduardo Escobar · Answer 3 · 2016-01-05T00:48:59.933

2

var models = {
  "2009": {
    Jaguar: [{model: "XF", id: "123"}, {model: "XK", id: "456"}, {model: "XJ", id: "789"}], 
    Volvo: [{model: "XC70", id: "223"}, {model: "V50", id: "256"}]
  }, 
  "2010": {
    Jaguar: [{model: "XF", id: "323"}, {model: "XK", id: "356"}], 
    Volvo: [{model: "XC70", id: "423"}, {model: "V50", id: "456"}]
  }
};

console.log(models[2010].Jaguar[0].model);

NOTE: models[2010] because it can't be accessed with dot notation.

edited Jan 05 '16 at 00:48

answered Jan 05 '16 at 00:43

Eduardo Escobar

3,301
2
18
15

1

He was working on his answer, i was working on mine, pure convengence, and you, for sure, were working on your next downvote :D (p.d: 1. I don't copy answers from other users, 2. Answer edited, it works!). – Eduardo Escobar Jan 05 '16 at 00:51
10min between these 2 anwsers. ;) But I know this kind of thing happens of we just want to help. – Vinícius Fagundes Jan 05 '16 at 00:53

Defining a multidimensional Object in Javascript

3 Answers3