How to write a nested multi dimensional json object

Question

I am studying json and i was wondering if this is the right way to write a multi dimensional json object that is nested.I wrote:

var foo = {
    "logged_in":true,
    "town":"Dublin",
    "state":"Ohio",
    "country":"USA",
    "products":2,
    "0":{
        "pic_id":"1500",
        "description":"Picture of a computer",
        "localion":"img.cloudimages.us/2012/06/02/computer.jpg",
        "type":"jpg",
        "childrenimages":2

        "0":{
        "pic_id":"15011",
        "description":"Picture of a cpu",
        "localion":"img.cloudimages.us/2012/06/02/mycpu.png",
        "type":"png"
          }
        "1":{
        "pic_id":"15012",
        "description":"Picture of a cpu two",
        "localion":"img.cloudimages.us/2012/06/02/thiscpu.png",
        "type":"png"
          }
    },
    "1":{
        "pic_id":"1501",
        "description":"Picture of a cpu",
        "localion":"img.cloudimages.us/2012/06/02/cpu.png",
        "type":"png"
    }
};

Is this right or is there a convention i should follow if my object becomes too deeply nested.

Answer 1

Consider using arrays instead of numerated object.

Arrays in json are defined using [] http://www.json.org/

Here is an example:

var foo = {
    "logged_in":true,
    "town":"Dublin",
    "state":"Ohio",
    "country":"USA",
    "products":
    [
        {
            "pic_id":"1500",
            "description":"Picture of a computer",
            "localion":"img.cloudimages.us/2012/06/02/computer.jpg",
            "type":"jpg",
            "childrenimages":
            [
                {
                    "pic_id":"15011",
                    "description":"Picture of a cpu",
                    "localion":"img.cloudimages.us/2012/06/02/mycpu.png",
                    "type":"png"
                },
                {
                    "pic_id":"15012",
                    "description":"Picture of a cpu two",
                    "localion":"img.cloudimages.us/2012/06/02/thiscpu.png",
                    "type":"png"
                }
            ]
        },
        {
            "pic_id":"1501",
            "description":"Picture of a cpu",
            "localion":"img.cloudimages.us/2012/06/02/cpu.png",
            "type":"png"
        }
    ],
};

(Forgive me if I forgot either closing { or [ or , its pretty hard to type code in SO :p )

This way you dont even need to have counts like

"products":2,

or

"childrenimages":2

You simply do

foo.products.length

or

foo.products[0].childrenimages.length

Good luck :)