[FWP] What is regex

[Roderick Carlson <guiloui@hotmail.com>]

As an extreme newbie,

What is a regex?

Thanks
Rod


>From: Ronald J Kimball <rjk@linguist.dartmouth.edu>
>Reply-To: Ronald J Kimball <rjk@linguist.dartmouth.edu>
>To: Eric Von Zee <evonzee@tritechnet.com>, FWP <fwp@technofile.org>
>Subject: Re: [Fun With Perl] Paranoia.
>Date: Fri, 18 Jun 1999 11:46:03 -0400
>
>On Fri, Jun 18, 1999 at 09:25:40AM -0500, Eric Von Zee wrote:
> > Bill Jones wrote:
> > >
> > > It prints:
> > >
> > <snip output>
> > > Plus there is a hidden message. :]
> > > (No, not in the above, but in the
> > > original source I posted...)
> > >
> > > PS - I didn't write it, I just want to
> > > understand it :)
> >
> > Ooooh ooohh I think I get it! (and I've never understood any of that
> > obfuscated stuff before!)
> >
> > Somebody more perly than myself will correct me if I am wrong, surely.
>
>Just one minor correction...
>
>
> > Join puts those all together to make (expanded):
> >
> > $_="JOIN THE JAX PERL MONGERS J acksonville Perl Mongers J\n";
> > / ((.)) /;
> > do {
> >     print substr($_,25);
> > } while ( s/((.).{23}) $2 (.)(.*) (.)$/$1$5 $2 $4 $3/ )
> >
> > which does (I think - my regexing sucks .. I havent read the owl yet -
> > just got it Wednesday. :D )
> >
> > Set $2 to J (the first character in $_, selected by ((.)) )
>
>Actually, the J that is selected is the one in the middle of the string.
>Those spaces in the regex / ((.)) / have to match too.
>
>Ronald
>
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