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Re: Scope problem (?) in implementing Design Patterns in Ruby

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Subject Re: Scope problem (?) in implementing Design Patterns in Ruby
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David Jacobs wrote in post #998093:
> I think the lookup starts at the innermost scope but since All isn't
> defined
> in Not, it reaches the top-level.

Yes, you are right:

1)
===
Constants defined within a class or module may be accessed unadorned 
anywhere within the class or module.

(Programming Ruby)
===

2)
===
Constants declared outside of a class or module are assigned global 
scope.

(http://www.techotopia.com/index.php/Ruby_Variable_Scope#Ruby_Constant_Scope)
===

So it's a case of the inner All hiding the global All.  And you can use 
the :: prefix to leap over an inner scope constant that hides a toplevel 
constant:

class All
  def greet
    puts 'All#greet'
  end
end

module C
  class All
     def greet
       puts "C::All#greet"
     end
  end

  class Dog
    def do_stuff
      ::All.new.greet  #<*****
    end
  end

end

C::Dog.new.do_stuff

--output:--
All#greet

-- 
Posted via http://www.ruby-forum.com/.

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Thread

Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-11 10:15 -0700
  Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-11 12:52 -0500
    Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-11 12:53 -0500
    Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-11 13:37 -0500
      Re: Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-11 18:07 -0700
    Re: Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-11 17:30 -0700
  Re: Scope problem (?) in implementing Design Patterns in Ruby 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-11 14:28 -0500
    Re: Scope problem (?) in implementing Design Patterns in Ruby 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-11 15:23 -0500
      Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-11 15:26 -0500
        Re: Scope problem (?) in implementing Design Patterns in Ruby 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-11 15:45 -0500
      Re: Scope problem (?) in implementing Design Patterns in Ruby 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-11 15:34 -0500
        Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-11 15:48 -0500
          Re: Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-12 08:59 -0700
            Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-12 20:56 -0500
              Re: Scope problem (?) in implementing Design Patterns in Ruby 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-12 21:11 -0500
                Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-12 21:18 -0500
              Re: Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-13 00:28 -0700
                Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-13 09:46 -0500
                Re: Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-13 10:55 -0700
                Re: Scope problem (?) in implementing Design Patterns in Ruby 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-13 12:50 -0500
                Re: Scope problem (?) in implementing Design Patterns in Ruby Steve Klabnik <steve@steveklabnik.com> - 2011-05-13 13:14 -0500
                Re: Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-23 19:24 -0700
              Re: Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-24 20:33 -0700
                Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-25 17:30 -0500
                Re: Scope problem (?) in implementing Design Patterns in Ruby RichardOnRails <RichardDummyMailbox58407@USComputerGurus.com> - 2011-05-27 22:08 -0700
  Re: Scope problem (?) in implementing Design Patterns in Ruby 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-12 21:20 -0500
    Re: Scope problem (?) in implementing Design Patterns in Ruby David Jacobs <developer@wit.io> - 2011-05-12 21:26 -0500
  Re: Scope problem (?) in implementing Design Patterns in Ruby Ryan Davis <ryand-ruby@zenspider.com> - 2011-05-13 12:29 -0500

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