This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# StringIO.ungetc (from ruby core) --- strio.ungetc(string) -> nil --- Pushes back one character (passed as a parameter) such that a subsequent buffered read will return it. There is no limitation for multiple pushbacks including pushing back behind the beginning of the buffer string.
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.