From: Simon Strandgaard <0bz63fz3m1qt3001@...>
Date: 2003-06-24T00:58:50+09:00
Subject: including modules => installing modules

I have some modules where I must use 'alias'
in order to use them.  But it tends to be nasty.

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

Is this possible ? 

How should it be done ?

--
Simon Strandgaard


> expand -t2 a.rb
module ArrayStuff
  def new_push(*ary)
    puts "Array#push: enter - #{ary.inspect}"
    old_push(*ary)
    puts "Array#push: leave"
    self
  end
  def ArrayStuff.install(klass)
    # what should I write here ?
  end
end

# ArrayStuff.install(Array)

class Array
  alias :old_push :push    # nasty
  include ArrayStuff
  alias :push :new_push    # nasty
end

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

> ruby a.rb
Array#push: enter - []
Array#push: leave
[1, 2]
Array#push: enter - [4, 5]
Array#push: leave
[1, 2, 4, 5]
>