From: Eric Schwartz <emschwar@...>
Date: 2002-11-12T04:46:43+09:00
Subject: More fun with modules

Okay, I *thought* I understood modules.  Then I try to factor out some
common 'utility' methods into a separate file so that I don't have to
mock up some silly inheritance hierarchy just to share functions like
AddHref(below).  But apparently I don't understand how names
propogate.  I figured that inside TestHarness::Bah, if it couldn't
resolve the name in Bah, it would look next in TestHarness, and then
in the global namespace.  Did I err?  If so, how can I get what I
want?  Do I need to introduce an artificial inheritance here, or is
there a way I'm not seeing to share the code?

Thanks,

-=Eric

$ cat testharness.rb
module TestHarness
   def AddHref(url, text)
      "<a href='#{url}'>#{text}</a>"
   end
end

$ cat testview.rb
require 'testharness'

module TestHarness
  class Bah
     def myprint
        puts AddHref('http://www.google.com/', 'Google')
     end
  end
end

TestHarness::Bah.new.myprint

$ ruby testview.rb
testview.rb:6: in 'myprint': undefined method 'AddHref' for #<TestHarness::Bah:0x4024e7e8> (NameError)
        from testview.rb:11

-=Eric
-- 
Come to think of it, there are already a million monkeys on a million
typewriters, and Usenet is NOTHING like Shakespeare.
		-- Blair Houghton