This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# String.succ! (from ruby core) --- succ! -> self --- Equivalent to String#succ, but modifies `self` in place; returns `self`. String#next! is an alias for String#succ!.
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.