This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Date.prev_year (from ruby core) --- d.prev_year([n=1]) -> date --- This method is equivalent to d << (n * 12). Date.new(2001,2,3).prev_year #=> #<Date: 2000-02-03 ...> Date.new(2008,2,29).prev_year #=> #<Date: 2007-02-28 ...> Date.new(2008,2,29).prev_year(4) #=> #<Date: 2004-02-29 ...> See also Date#<<.
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.