This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Array.shelljoin (from ruby core) --- array.shelljoin => string --- Builds a command line string from an argument list `array` joining all elements escaped for the Bourne shell and separated by a space. See Shellwords.shelljoin for details.
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.