This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# IO.nonblock= (from ruby core) --- io.nonblock = boolean -> boolean --- Enables non-blocking mode on a stream when set to `true`, and blocking mode when set to `false`.
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.