From: Stefano Crocco <stefano.crocco@...>
Date: 2007-01-26T09:10:38+09:00
Subject: Re: Ruby language question

Alle 01:02, venerd狸 26 gennaio 2007, Neville Franks ha scritto:
> Hi, I've been working on adding Ruby language support to our IDE "ED for
> Windows" the past few weeks and am stuck understanding the marked
> statement in this code:
>
>    module Mod
>      def size
>        @size
>      end
>      def size=(val)   # what does this mean
>        @size = val
>      end
>    end
>
> None of the reference material I've found so far shows this. I saw it in
> the documentation for: attr(symbol, writable=false) => nil
>
> Thanks,
> Neville

def size=(val) is simply the definition of a method called size=, which 
accepts the parameter val. It's the ruby way of allowing write access to an 
instance variable. Its role is similar to C++ setter functions. When you 
write

  an_object.var=2

I hope this answers your question.

Stefano