This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Pathname.each_entry (from ruby core) --- each_entry() --- Iterates over the entries (files and subdirectories) in the directory, yielding a Pathname object for each entry.
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.