This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Zlib::BufError < Zlib::Error (from ruby core) --- Subclass of Zlib::Error when zlib returns a Z_BUF_ERROR. Usually if no progress is possible. ---
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.