This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# PrettyPrint.group_sub (from ruby core) --- group_sub() { || ... } --- Takes a block and queues a new group that is indented 1 level further.
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.