Filtering arrays with NSPredicate - Finding files by type in a folder

While working on my latest creation it was necessary to get a list of the files by file type, extension.
This article shows how to filter an array using NSPredicate.

Filtering arrays with NSPredicate
http://useyourloaf.com/blog/2010/7/27/filtering-arrays-with-nspredicate....

Hope this helps
-James