This page contains automated test results for code from O'Reilly's Ruby Cookbook. If this code looks interesting or useful, you might want to buy the whole book.

Avoiding Naming Collisions with Namespaces
CodeExpectedActual
module StringTheory
  class String
    def initialize(length=10**-33)
      @length = length
    end
  end
end
String.new
 "" "" 
StringTheory::String.new
 #<StringTheory::String:0xb7c343b8 @length=1.0e-33> #<StringTheory::String:0xb7c343b8 @length=1.0e-33> 
module StringTheory2
 RubyString = String
 class String
   def initialize(length=10**-33)
     @length = length
   end
  end
  RubyString.new("This is a built-in string, not a StringTheory2::String")
end
 "This is a built-in string, not a StringTheory2::String" "This is a built-in string, not a StringTheory2::String"