adambard/learnxinyminutes-docs — pull request #485 by levibostian (2014-01-09 05:41:22+00:00)
Title: Objective-C categories and extensions

Add description and examples of Objective-C categories and simulating protected methods. Also includes extensions description with example.

The descriptions are longer, but I felt categories need more explaining to see the value out of them instead of just creating a subclass. It also leads into extensions nicely.