From: Victor 'Zverok' Shepelev <vshepelev@...>
Date: 2006-11-01T23:53:31+09:00
Subject: Re: variable pointer

akbarhome (akbarhome@gmail.com)
1/11/2006 16:45:17

> @c = "donal"
> @b = @c
> 
> abrakadabra(@b, @c)
> 
> @c = "mickey"
  ^^^^ the problem is here

In ruby, var = value is not "change var's value", but rather "set name var for value".
Then, after
@b = @c
@c and @b "points" to same value, and if you change this value, you would see new value through @b and through @c.

@c = "donal"
@b = @c
@c.upcase!
print @b #=> DONAL

but when you do
@c = "mickey"

@c becames to 'point' to "mickey", and @b - still to "donal".
AFAIK, there's no way to change @b in correspondence.

V.