This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Proc.to_s (from ruby core) --- prc.to_s -> string --- Returns the unique identifier for this proc, along with an indication of where the proc was defined.
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.