Because of timing considerations (I presume), “Cocoa Programming” does not cover MacRuby. However, the vast majority of its content is applicable to MacRuby. I’m wondering if there is a way in which the MacRuby community could help to fill in some of the holes, until a revised version (or whatever) comes out.
For example, what if we set up a wiki page for each chapter in the book, noting and clarifying issues that make the book invalid for MacRuby? In particular, the page could present and explain code changes that would be needed to make the examples work under MacRuby.
This material could be hosted on http://www.macruby.org/trac/wiki (or elsewhere, if desired). The main issue, however, is that this effort should be approved by the book’s author and publisher. Is this possible and, if so, what should the ground rules be?