From: Rick DeNatale <rick.denatale@...>
Date: 2008-05-15T09:43:18+09:00
Subject: Re: Override methods from a module

On Wed, May 14, 2008 at 7:24 PM, Dave Rothlisberger <dave@rothlis.net> wrote:
>> Please let me know if this makes sense/how this could be improved.
>>
>> module Stuff
>>   def self.included mod
>>     @@mixer_class = mod
>>   end
>>
>>   def initialize
>>     super
>>     @@mixer_class.class_eval do
>>       alias_method :old_setup, :setup
>>       alias_method :old_teardown, :teardown
>>
>>       define_method(:setup) do
>>         old_setup
>>         puts "new setup"
>>       end
>>
>>       define_method(:teardown) do
>>         old_teardown
>>         puts "new teardown"
>>       end
>>     end
>>   end
>> end
>
> A slightly nicer way to write the above:
>
> module Stuff
>  def self.included(mod)
>    mod.class_eval do
>      alias_method_chain :setup, :new_feature
>    end
>  end
>
>  def setup_with_new_feature
>    setup_without_new_feature
>    puts 'new setup'
>  end
>
>  def teardown_with_new_feature
>    teardown_without_new_feature
>    puts 'new teardown'
>  end
> end

alias_method_chain, nice as it is, is part of activesupport (i.e. part
of Rails) and is not standard Ruby.

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/