This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# String.swapcase! (from ruby core) --- swapcase!(*options) -> self or nil --- Upcases each lowercase character in `self`; downcases uppercase character; returns `self` if any changes were made, `nil` otherwise: s = 'Hello World!' # => "Hello World!" s.swapcase! # => "hELLO wORLD!" s # => "Hello World!" ''.swapcase! # => nil The casing may be affected by the given `options`; see [Case Mapping](doc/case_mapping_rdoc.html). Related: String#swapcase.
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.