From: Trans <transfire@...>
Date: 2008-04-03T03:46:49+09:00
Subject: A Question Of Coupling

I have a choice to make about a class interface. This is a very very
simplified "foo" demo of that choice.

#1

  class Foo
    def initialize(bar)
      @bar = bar
    end

    def okay?
      bar.okay?
    end
  end

  bar = Bar.new
  Foo.new(bar)

Or #2

  class Foo
    def initialize( opts )
      @okay = opts[:okay]
    end

    def okay?
      @okay
    end
  end

  bar = Bar.new
  Foo.new(:okay => bar.okay?)

Now, my inner OOP Angel is telling me to take door #2 in order to
avoid strong coupling between Bar and Foo. But, my Red Ruby Devil is
saying "Duck typing, you fool. It doesn't matter anymore!"

Is he right? Has Ruby completely changed the game? If so, why aren't
more Rubyists using OStruct-esque option passing?

T.