From: Brian Candler <B.Candler@...>
Date: 2007-05-30T16:31:32+09:00
Subject: Re: Regexp to extract number with hyphen

On Wed, May 30, 2007 at 08:15:05AM +0900, bcparanj@gmail.com wrote:
> The regexp: /foo\ (\d+)\-?(\d*)/
> seems to work. Still testing...

What exactly are the allowed matches? Only num1-num2, or is num1 by itself
allowed? What about num1-num2-num3?

  /foo ([0-9-]+)/    matches .....foo 1-2-3.... and foo 1-2 and foo 1
  /foo (\d+-\d+)/    matches .....foo 1-2.... only
  /foo (\d+(-\d+)?)/ matches .....foo 1-2.... and foo 1, but not foo-1-2-3