What? - irb extension gem to find your methods
http://www.youtube.com/watch?v=2u3c5z45V8g
If Samuel just would have asked me, I got an answer:
Oldies, but Goldies: ‘Methodfinder’ is a really nice extension for your ruby/rails irb and shipped with the ‘what_methods’ gem. I’m using quite a lot and can’t go without it anymore (aka. I’m too stupid to remember all those method names ;-).
gem install what_methods
http://redhanded.hobix.com/inspect/stickItInYourIrbrcMethodfinder.html
See more hints by Dr. Nic blog here