This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# NilClass.| (from ruby core) --- false | obj -> true or false nil | obj -> true or false --- Or---Returns `false` if *obj* is `nil` or `false`; `true` otherwise.
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.