How to parse json in javascript having dynamic key value pair?

Question

I want to parse a JSON string in JavaScript. The response is something like

var response = '{"1":10,"2":10}';

How can I get the each key and value from this json ?

I am doing this -

var obj =  $.parseJSON(responseData);
console.log(obj.count);

But i am getting undefined for obj.count.

To get the no. of elements count use `Object.keys(obj).length` — Tushar, Jul 08 '15 at 06:48
@Tushar And if i want key and value then how can i do this ? — Amit Das, Jul 08 '15 at 06:50
http://stackoverflow.com/questions/684672/loop-through-javascript-object — Tushar, Jul 08 '15 at 06:51

score 16 · Accepted Answer · edited Jun 20 '20 at 09:12

To access each key-value pair of your object, you can use Object.keys to obtain the array of the keys which you can use them to access the value by [ ] operator. Please see the sample code below:

Object.keys(obj).forEach(function(key){
    var value = obj[key];
    console.log(key + ':' + value);
});

Output:

1 : 10

2 : 20

Objects.keys returns you the array of the keys in your object. In your case, it is ['1','2']. You can therefore use .length to obtain the number of keys.

Object.keys(obj).length;

score 5 · Answer 2 · answered Jul 08 '15 at 06:54

5

So you need to access it like an array, because your keys are numbers. See this fiddle:

https://jsfiddle.net/7f5k9het

You can access like this:

 result[1] // this returns 10
 result.1 // this returns an error

Good luck

answered Jul 08 '15 at 06:54

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How to parse json in javascript having dynamic key value pair?

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