This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Date.to_s (from ruby core) --- d.to_s -> string --- Returns a string in an ISO 8601 format. (This method doesn't use the expanded representations.) Date.new(2001,2,3).to_s #=> "2001-02-03"
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.