Get the object key name in JSON

Question

Am having an object like:

var myObj={
    id: 1,
    name: "John",
    parentName: "Peter"
}

But while processing this JSON I'm comparing with some logic where I'm not able to get the key name to be compared since I'm assigning the key name to be compared to another variable:

Example:

This is the logic:

If I want to get the value of parentName say "Peter".My logic compares by having the parentName stored in another variable say dummyVariable.If so I'm fetching the value of parent Name like

 var dummyVariable=parentName;

 var parentValu=myObj.dummyVariable; //which leads to a undefined state .

How can I get the value of parentName if I use a different variable,in this case dummyVariable?

Use bracket notation `var parentValu=myObj[dummyVariable]` – Satpal Apr 27 '15 at 10:41 — Satpal, Apr 27 '15 at 10:41

score 2 · Accepted Answer · answered Apr 27 '15 at 10:43

2

I think what you want is this:

var myObj={
    id: 1,
    name: "John",
    parentName: "Peter"
}

Then:

var result = myObj['parentName'];  
// result now equals "Peter"

or

var key = 'parentName';
var result = myObj[key];
// result now equals "Peter"

answered Apr 27 '15 at 10:43

Chris Charles

4,406
17
31

What can be done if the object is dynamic – forgottofly Apr 27 '15 at 10:45

score 0 · Answer 2 · answered Apr 27 '15 at 10:43

0

the approach you might want to try is myObj[dummyVariable]

answered Apr 27 '15 at 10:43

Max Bumaye

1,017
10
17

Get the object key name in JSON

2 Answers2