From: Oliver Saunders <oliver.saunders@...>
Date: 2008-07-12T14:06:09+09:00
Subject: Modules

I understand the way these things are working but I don't really
understand what's going on and why.

module Foo
  def bar
    1
  end
  def Foo.zim
    2
  end
end


>> Foo.zim # works, OK, fair enough
2
>> Foo::zim # works, but why have two syntaxes that do the same?
2
>> Foo.bar # NoMethodError. Shouldn't this work though? What if I had a procedural API that I wanted to namespace: -

module SomeNamespace
  require 'procedural_api'
end

SomeNamespace.function_from_procedural_api # this ain't gonna work!
SomeNamespace::function_from_procedural_api # nor is this

class SomeClass
  include Foo
end

>> SomeClass.new.bar # OK, it's been mixed in
1
>> SomeClass.zim # NoMethodError, huh? Why doesn't this work?
>> SomeClass.new.zim # NoMethodError. So where has the zim definition actually gone? Doesn't it get included at all?

I'm very confused by all this. Please help unravel the mess in my brain.
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