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

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.

Answer

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;