This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# StringIO.rewind (from ruby core) --- strio.rewind -> 0 --- Positions the stream to the beginning of input, resetting `lineno` to zero.
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.