From: Morgan Grubb <morgan.grubb@...>
Date: 2007-08-21T01:34:05+09:00
Subject: Re: Assignment as a reference?

------=_Part_125046_28474116.1187627649687
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

Thanks for that.

I've been reading through quite a few references and manuals (working
through Agile Web Development at the moment) and the fact that every
assignment is a reference hasn't really been mentioned that much. Guess I've
missed it or haven't gotten that far.

Cheers.


On 20/08/07, Douglas F Shearer <dougal.s@gmail.com> wrote:
>
>
> On 20 Aug 2007, at 17:20, Morgan Grubb wrote:
> > foo = 'bar' #=> bar
> > foo2 = foo #=> bar
> > foo.gsub! 'bar', 'wibble' #=> wibble
> > foo2 #=> wibble
>
> What you have experienced is reference assignment. If you wish to
> duplicate only the content, and not the reference, then you should to
> use .dup.
>
> > foo = "bar"
> => "bar"
> > foo2 = foo.dup
> => "bar"
> > foo = "wibble"
> => "wibble"
> > foo2
> => "bar"
>
> Hope this helps you out.
>
> Douglas F Shearer
> dougal.s@gmail.com
> http://douglasfshearer.com
>
>

------=_Part_125046_28474116.1187627649687--