This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Psych::Nodes::Document.root (from ruby core) ### Implementation from Document --- root() --- Returns the root node. A Document may only have one root node: http://yaml.org/spec/1.1/#id898031
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.