Extract Variables from a serialized JSON-Object in JavaScript

Question

I want to extract the three variables (friendCount, pnCount, and allCount) out of a string representation of the following Object:

'{"friendCount":5,"pnCount":0,"allCount":5}'

I thought about using a RegEx or similar, but I have no further Idea. The numbers in the string may be between 0 and about 100

score 7 · Accepted Answer · answered Jan 21 '16 at 14:42

If that is a string, than parse it...

var str = '{"friendCount":5,"pnCount":0,"allCount":5}';
var obj = JSON.parse(str);
console.log(obj.friendCount, obj.pnCount, obj.allCount);

If it is already an object, just reference it

var obj = {"friendCount":5,"pnCount":0,"allCount":5};
console.log(obj.friendCount, obj.pnCount, obj.allCount);

score 1 · Answer 2 · answered Jan 21 '16 at 14:43

1

Try this

var data= {"friendCount":5,"pnCount":0,"allCount":5}

var friendCount = data.friendCount;
var pnCount = data.pnCount;
var allCount = data.allCount;

answered Jan 21 '16 at 14:43

Anoop LL

1,548
2
21
32

score 0 · Answer 3 · answered Jan 21 '16 at 14:46

If you want Regex it can be done like this:

var re = /([\w]+)":(\d+)/g; 
var str = '"friendCount":5,"pnCount":0,"allCount":5';
var m;

while ((m = re.exec(str)) !== null) {
    if (m.index === re.lastIndex) {
        re.lastIndex++;
}
// View your result using the m-variable.
// eg m[0] etc.

}

Extract Variables from a serialized JSON-Object in JavaScript

3 Answers3