From: Mathieu Bouchard <matju@...>
Date: 2001-01-19T06:52:30+09:00
Subject: [ruby-talk:9525] Re: Newbie question: call-by-reference

> |Hello there, I�m just stuck on this. I�ve been searching the mailing
> |list and found nothing, so it must be too obvious.
> |But indeed, how could I get in a method call a reference to the argument
> |--instead of the value--so I can modify it inside.
> How about wrapping the value by an array?
>   def incr(i)
>       i[0]+=1
>   end
>   a = [0]
>   incr(a)
> Little bit ugly, but call by reference is conceptually ugly I
> believe. ;-)

Zero-Dimensional Arrays. Fun For The Whole Family.

class Variable
	def initialize(value=nil)
		@value = value
	end
	def [](); @value; end
	def []=(value); @value = value; end
end



matju