Convert birthday to age in angularjs

Question

I want to display age of all my users to grid. I am reading data from facebook.I am not storing it at anywhere.

i am displaying date like :

{{ friend.birthday }}

How can i display age instead of displaying birthday.

if it is possible to create filters than how to create filter and how to apply it.

Answer 1

Idk why I can never reply to people, says I need more rep but to rep I need to comment.. whatever.

In response to @Dean Christian Armada's, I kept getting an error regarding the filter. But changing to the following seems to work fine so I do appreciate it!

$scope.getAge = function(birthday){
    var birthday = new Date(birthday);
    var today = new Date();
    var age = ((today - birthday) / (31557600000));
    var age = Math.floor( age );
    return age;
  }

And for the HMTL

{{ getAge(birthdate) }}