Expose Module methods as Instance and Class methods

Have you ever wondered how to include a Module and has its methods be available as instance methods and class methods? I certainly did and after doing a little research I figured out a way to do this in Ruby. For the experience Ruby programmers out there, this is probably very obvious but for those that haven't completely figured out Class object and instance of a class then this should help a little. Or totally confused you.

I don't know whether it is wise to do this but at least it is possible to do. Anyway, enough talking. Here is the code in all it (not so) glory.

module Methods
 def self.included(base)
  # add methods in ClassMethods into the meta class
  base.extend(ClassMethods)
 end
 
 def hi
  # accessing the meta class to call the
  # real method
  class << self
   self.hi
  end
 end
 
 def bye
  class << self
   self.bye
  end
 end

 module ClassMethods
  def hi
   puts "Hello"
  end
  
  def bye
   puts "Good Bye"
  end
 end
end

class Greeting
 include Methods
end

# Calling Instance methods here
Greeting.new().hi
Greeting.new().bye

# calling Class methods here
Greeting.hi
Greeting.bye