From: Gennady Bystritsky <gfb@...>
Date: 2005-06-05T04:56:25+09:00
Subject: Re: Question about string's in-place modification

Just look into string.c in Ruby distribution. It's open source, after 
all ;-).

Gennady.

On Jun 4, 2005, at 12:10, Sam Kong wrote:

> Hello!
>
> I wonder how destructive methods work in the behind.
>
> For example,
>
> s = '12345'
> s2 = s
> s.sub!('3', 'three')
> puts s #->'12three45'
> puts s2 #->'12three45'
>
> Destructive methods are in-place.
> Does that mean the object doesn't change its location in memory?
> Probably not.
> I don't think it's possible as the object might need more space and
> need to move to a bigger empty space for the changed data.
> If it moves, the references pointing to it should be updated as well.
>
> How exactly does that work?
>
> Thanks in advance.
> Sam
>
>