[tpm] String matching at start or middle or end of list

[Indy Singh]

Splitting is an option, but I am looking to minimize the amount of code. So in this case I am looking to match only.


Indy Singh
IndigoSTAR Software -- www.indigostar.com
-----Original Message----- 
From: Mike Stok
Sent: Monday, April 29, 2013 11:15 AM
To: Indy Singh
Cc: Toronto PerlMongers
Subject: Re: [tpm] String matching at start or middle or end of list

Do you need to match or could you just split the list and see if any of the elements are what you want?

Mike

On 2013-04-29, at 11:09 AM, "Indy Singh" <indy at indigostar.com> wrote:

> Hi All,
>
> What is a good way to match a string that may appear at the start or middle or end of a list.  I have stumbled along and made this 
> work in the past, now I am looking for the clean and proper way to do it.
>
>
> Example:
> my $s = 'foo,bar,boo,baz';
> my ($match) = $s =~ /(foo)/;
>
> I am looking to match the following:
> The start of a string or a separator followed by
> A specified string followed by
> A separator or the end of the string
>
> What are the extra things I need to surround the match expression?
>
> One of the unpleasant side effects of putting a list with alternatives at the start .e.g. '(^|,)' , is that it creates an 
> undesired capture string. Is it possible to avoid creating the capture string?
>
> Indy Singh
> IndigoSTAR Software -- www.indigostar.com
>
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> toronto-pm at pm.org
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-- 

Mike Stok <mike at stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.