This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# LocalJumpError.reason (from ruby core) --- local_jump_error.reason -> symbol --- The reason this block was terminated: :break, :redo, :retry, :next, :return, or :noreason.
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.