From: ts <decoux@...>
Date: 2003-06-24T01:07:50+09:00
Subject: Re: including modules => installing modules

>>>>> "S" == Simon Strandgaard <0bz63fz3m1qt3001@sneakemail.com> writes:

S> I guess its possible to make an install method, which creates
S> the necessary aliases and then extends the specified class.

 This is just an example

svg% cat b.rb
#!/usr/bin/ruby
module ArrayStuff
  def new_push(*ary)
    puts "Array#push: enter - #{ary.inspect}"
    old_push(*ary)
    puts "Array#push: leave"
    self
  end

  def self.append_features(klass)
     super
     klass.instance_eval do
        alias_method :old_push, :push
        alias_method :push, :new_push
     end
  end
end

class Array
  include ArrayStuff
end

p [1, 2].push(*[])
p [1, 2].push(*[4, 5])
svg% 

svg% b.rb
Array#push: enter - []
Array#push: leave
[1, 2]
Array#push: enter - [4, 5]
Array#push: leave
[1, 2, 4, 5]
svg% 



Guy Decoux