This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Set.filter! (from ruby core) --- filter!(&block) --- Equivalent to Set#select! (This method is an alias for Set#select!.) Equivalent to Set#keep_if, but returns nil if no changes were made. Returns an enumerator if no block is given.
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.