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

Mike Stok mike at stok.ca
Mon Apr 29 08:15:01 PDT 2013

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


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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Mike Stok <mike at stok.ca>

The "`Stok' disclaimers" apply.

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