From: Dave Bass <davebass@...>
Date: 2008-06-14T20:32:37+09:00
Subject: Re: Modules, Overloading, and some Confusion

Old Echo wrote:
> how
> can I can call the start method defined in Honda rather than the start
> method defined in Ford?

The point is that it's the last-included start method that gets run. 
Since Ruby is very dynamic, you can modify classes on-the-fly, even for 
instantiated objects. Try this:

module Honda
  def start
    puts "Wroom"
  end
end

module Ford
  def start
    puts "Rrrooom"
  end
end

class Car
  include Honda
end

car = Car.new
car.start  # => "Wroom" ... it's a Honda

class Car
  include Ford
end

car.start  # => "Rrrooom" ... now it's a Ford!


However, you can't switch back to a Honda by adding this onto the end of 
the code above:


class Car
  include Honda
end

car.start  # => "Rrrooom" ... oops, it's still a Ford


This is because Honda has already been included once, so the new include 
gets ignored (I think).

Don't know if this solves your problem. Of course, another way around it 
would be to rename one of your start methods.
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