Get the object length in angularjs is undefined

Question

How can I get the object length ?

In console my object looks like this:

Object {
 2: true,
 3: true,
 4: true
}

.length w

Answer 1

Combining some of these answers into

app.filter('numkeys', function() {
  return function(object) {
    return Object.keys(object).length;
  }
});

seems to work

<div ng-show="(furry.animals | numkeys) > 10">lots of furry animals</div>

Answer 2

Even I don't understand why in Angular markup not able to get the value of Objects via 'Object.keys'. But here there's some easy solution. Check it out.