From: Brian Candler <B.Candler@...>
Date: 2007-05-30T22:56:15+09:00
Subject: Re: Regexp to extract number with  hyphen

On Wed, May 30, 2007 at 10:40:09PM +0900, Ken Bloom wrote:
> Others have suggested the following correction:
>   /(\d+)-?(\d+)/

That particular example matches 11, but not 1.

The most important thing is to be clear about exactly what you want to allow
to match or not match; then writing the regexp is easy.