Using a variable to select a JSON array element

Question

Is it possible to supply a variable to select a particular element within a JSON array element in order to select it?

Assuming I have many users:

"users": [
    { "id":"000000", "uname": "admin", "password": "admin", "phash": "b109f3bbbc244eb82441917ed06d618b9008dd09b3befd1b5e07394c706a8bb980b1d7785e5976ec049b46df5f1326af5a2ea6d103fd07c95385ffab0cacbc86",
        "profile": {
            "fullname"  : "Admin Admin",
            "datejoined": "01-01-2014",
            "reputation": "100",
            "displaypic": "http://www.google.com/logo.png",
            "cart": {
                "Cid" : "1000000",
                "item": [
                    { "Iid": "00000001", "quantity": "10" }
                ]
            }
        }
    },

Is it possible to select the above element by supplying just the username using jQuery?

I have tried: Note: uname in the jQuery is a variable with "admin" assigned

$.getJSON('ssUsers.json', function (data) {

        $(data.users[uname].profile.cart.item).each(function () {
            ++cartItems;
        });

With little luck:

[Error] TypeError: 'undefined' is not an object (evaluating 'data.users[uname].profile')

Wouldnt it by easier (and probably the best solution) that the key users is the id of the user? : '000000' : [{...}] — Karl-André Gagnon
– Karl-André Gagnon, Commented Mar 27, 2014 at 12:31

f p · Accepted Answer · 2014-03-27 13:06:10Z

1

Using grep:

thisUser = $.grep(data.users, function(e) { return e.uname==uname});

edited Mar 27, 2014 at 13:06

answered Mar 27, 2014 at 12:42

f p

3,2431 gold badge30 silver badges36 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sudharsan S · Accepted Answer · 2014-03-27 12:30:50Z

0

Try this:

$.getJSON('ssUsers.json', function (data) {

        for(i=0; i<data.users.length ; i++){
            $(data.users[i].uname.profile.cart.item).each(function () {
                ++cartItems;

            }
        });

answered Mar 27, 2014 at 12:30

Sudharsan S

15.4k4 gold badges34 silver badges51 bronze badges

2 Comments

Andrei0427 Over a year ago

This would work, but I have many users but this would only work for the first user

Roberto Over a year ago

But "profile" is not under "uname", That code should fail, shouldn't it ?

Collectives™ on Stack Overflow

Using a variable to select a JSON array element

2 Answers 2

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related