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

Matthew Phillips mattp at cpan.org
Mon Apr 29 08:14:18 PDT 2013

Maybe 'if ('foo,bar,boo,baz' =~ /,?foo,?/) { ... } ' is what you're looking


On Mon, Apr 29, 2013 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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