This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Date.yday (from ruby core) --- d.yday -> fixnum --- Returns the day of the year (1-366). Date.new(2001,2,3).yday #=> 34
This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.