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Mixing in Class Methods (written by Phil Tomson)
CodeExpectedActual
module MyLib
  module ClassMethods
    def class_method
      puts "This method was first defined in MyLib::ClassMethods"
    end
  end
end
module MyLib
  def self.included(receiver)
    puts "MyLib is being included in #{receiver}!"
    receiver.extend(ClassMethods)
  end
end
class MyClass
  include MyLib
end
 
MyLib is being included in MyClass!
 
MyLib is being included in MyClass!
 
MyClass.class_method
 
This method was first defined in MyLib::ClassMethods
 
This method was first defined in MyLib::ClassMethods