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) -> string --- Returns a string containing the characters in `self`, with cases reversed; each uppercase character is downcased; each lowercase character is upcased: s = 'Hello World!' # => "Hello World!" s.swapcase # => "hELLO wORLD!" 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.