From: Stanley Roberts <caseyandstanley@...>
Date: 2009-02-11T19:47:25+09:00
Subject: Redefine modules?

Hi,
   I am quite new to Ruby and make some experiences with modules and
classes.
I have defined a module and an inner class with the same name (Cucc) and
a static method (x) for the class. Then I made a redefinition (or
whatever you call) of the same module (Cucc) without the inner class but
with a static (x) method.

Before the redefinition x method of the Cucc module's inner class Cucc
is called but right after the modules static method is called. Why?

I totally agree that coding style like below is among the first 10 on
the list to avoid during programming, but though I want to understand
the behavior!

I have created the following code:
------CODE START-----------
module Cucc
  def Cucc.x(arg)
    puts arg.to_s + " Cucc.x"
  end
  def x(arg)
    puts arg.to_s + " Cucc module x"
  end
  class Cucc
    def Cucc.x(arg)
      puts arg.to_s + " Cucc module Cucc class Cucc.x"
    end
    def x(arg)
      puts arg.to_s + " Cucc module Cucc class x"
    end
  end
end

puts "Cucc class started first"
Cucc::x(10)
c = Cucc::Cucc.new
c.x(20)
Cucc::Cucc.x(30)
puts "Cucc class ended first"

module Cucc
   def Cucc.x(arg)
     puts arg.to_s + " Redefined Cucc module Cucc.x"
   end
   def x(arg)
     puts arg.to_s + " Redefined Cucc module x"
   end
end

puts "Cucc class started second"
Cucc::x(10)
c = Cucc::Cucc.new
c.x(20)
Cucc::Cucc.x(30)
puts "Cucc class ended second"
------CODE END-----------

The outcome is the following:
Cucc class started first
10 Cucc.x
20 Cucc module Cucc class x
30 Cucc module Cucc class Cucc.x
Cucc class ended first
Cucc class started second
10 Cucc.x
20 Cucc module Cucc class x
30 Redefined Cucc module Cucc.x
Cucc class ended second

How the hell is it possible that for the "30" that I get different
result when having a redefinition (or so) of the Cucc module?

At first the inner class' static method is called and in the second case
the static method of the module!

Thanks in advanced, --stan--
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