book_of_ruby_code

The source code for the book http://www.nostarch.com/ruby

It's marked all over the place in the code where to get it.

http://www.sapphiresteel.com/IMG/zip/book-of-ruby.zip

I have converted it all to markdown as well for a nicer view here.

For chapter 20 expansion

http://viewsourcecode.org/why/index.html

http://ruby-metaprogramming.rubylearning.com/

http://mislav.uniqpath.com/poignant-guide/dwemthy/

http://mislav.uniqpath.com/poignant-guide/book/chapter-6.html