Count Key/values In Json

Possible Duplicate: Length of Javascript Associative Array I have a JSON that looks like this: Object: www.website1.com : 'dogs' www.website2.com : 'cats' >__proto__

Solution 1:

You have to count them yourself:

functioncount(obj) {
   var count=0;
   for(var prop in obj) {
      if (obj.hasOwnProperty(prop)) {
         ++count;
      }
   }
   return count;
}

Although now that I saw the first comment on the question, there is a much nicer answer on that page. One-liner, probably just as fast if not faster:

functioncount(obj) { returnObject.keys(obj).length; }

Be aware though, support for Object.keys() doesn't seem cross-browser just yet.

Solution 2:

.length only works on arrays, not objects.

var count = 0;
for(var key in json)
    if(json.hasOwnProperty(key))
        count++;