This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Enumerator.rewind (from ruby core) --- e.rewind -> e --- Rewinds the enumeration sequence to the beginning. If the enclosed object responds to a "rewind" method, it is called.
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.