From: 7stud -- <bbxx789_05ss@...>
Date: 2007-11-13T04:21:07+09:00
Subject: Re: class <<Time ?

Gamont Gamont wrote:
> Im see this example and i didnt understand how it works.
> I dont find doc abou this construct.
> 
> I find about object-specific class (class <<a), but here
> its a class.
> 
> class <<Time
>   alias old_now now
>   def now
>     old_now.to_f * FACTOR
>   end
> end
> 
> and when this statement executes
> 
> Time.now, it calls the method in anonymous class and
> no more in Time class.
> 
> How this works ?
> 


class Dog
  def Dog.bark
    puts  'Woof'
  end

  def self.speak
    puts 'I am a Dog.'
  end

  class <<Dog
    def run
      puts "Run run"
    end
  end

  class <<self
    def growl
      puts "Grrrrr"
    end
  end

end


class <<Dog
  def sayhi
    puts 'hi'
  end
end

Dog.bark
Dog.speak
Dog.run
Dog.growl
Dog.sayhi

--output:--
Woof
I am a Dog.
Run run
Grrrrr
hi

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