In this tutorial, I extend the album to add categories and filtering functionality using AngularJS. My favorite thing about AngularJS is that I think something is going to take N lines of code to get the job done and it always ends up being MUCH less.
You can grab the code here:
http://plnkr.co/edit/6JXEbyLhjdWefxSdn4pw?p=preview
If you have any technical questions check out the awesome mailing list here:
https://groups.google.com/forum/?fromgroups#!forum/angular
