From: Gennady <bystr@...>
Date: 2003-12-12T07:50:04+09:00
Subject: Re: Simple issue giving problems


On Dec 11, 2003, at 14:37, Brad wrote:

> Hello all,
>
> I have a problem that may or may not be an easy fix. :)
>
> Given the following:
>
>
> a=1
> b=2
>
> def swapper(dest,src)
>    dest,src=src,dest
> end


If you put it this way:

a=1
b=2

dest=a
src=b

dest,src=src,dest

It swaps dest and src. And I do not think you would expect a and b 
being swapped as well as a result of this. Same with calling a method 
as in your example. You cannot deal with variables' addresses in Ruby 
as in C.

>
> swapper(a,b)
> p [ a, b ]
>
>
>
> Why are the values of the variables not swapped?  Is there
> a way to coerce ruby into doing a and b by using src and dest?
>
> Any help is greatly appreciated.
>
> Thanks,
>
> Brad
>
>

Sincerely,
Gennady Bystritsky