From: Daniel Berger <djberg96@...>
Date: 2010-04-21T04:13:31+09:00
Subject: [ruby-core:29670] "include X; include Y" vs "include X, Y"

Hi,

Ruby 1.8.7
OSX 10.6.x

It seems that when including multiple modules with identical method
names there are different results when using multiple includes versus
a single include with multiple arguments. In the the former case we
get a "last method definition wins" but in the latter it's "first
method definition wins".

Is this expected behavior? If so, where is it documented?

module X
  def hello
    puts "hello"
  end
end

module Y
  def hello
    puts "greetings"
  end
end

class Foo
  include X
  include Y
end

class Bar
  include X, Y
end

Foo.new.hello # => greetings
Bar.new.hello # => hello

Regards,

Dan