This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# OptionParser.environment (from ruby core) --- environment(env = File.basename($0, '.*')) --- Parses environment variable `env` or its uppercase with splitting like a shell. `env` defaults to the basename of the program.
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.