Metaprogramming Ruby and Rails Antipatterns

Nice Explanation of Metaprogramming and Antipatterns :

http://eewang.github.io/blog/2013/04/29/metaprogramming-ruby-and-antipatterns-in-rails/

http://eewang.github.io/blog/2013/05/17/metaprogramming-ruby-and-rails-antipatterns-part-2-of-2/