This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# TypeError < StandardError (from ruby core) --- Raised when encountering an object that is not of the expected type. [1, 2, 3].first("two") *raises the exception:* TypeError: no implicit conversion of String into Integer ---
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.