From: Marc Casaldaliga <casaldaliga@...>
Date: 2001-01-18T03:37:15+09:00
Subject: [ruby-talk:9466] 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.

def incr(i)
    i+=1
end

I guess that�s something rarely needed because in instance methods you
always get the self reference to modify the reciever but anyway is it
possible to do it?

I�ve seen examples where an Array gets modified:

def addElement(anArray, number)
    anArray << number
end

(again a silly example, but is it possible in general?)

Thanks in advance

Marc