From: "Mark J. Reed" <markjreed@...>
Date: 2003-12-10T02:12:03+09:00
Subject: Re: Multiline Regexps

On Wed, Dec 10, 2003 at 01:56:43AM +0900, Ceri Storey wrote:
> Either this is a bug, or I'm missing something:
> 
> irb(main):001:0> /^[aeiou]/.match("foo\noooh")
> => #<MatchData:0x81d588c>
> irb(main):002:0> /^[aeiou]/m.match("foo\noooh")
> => #<MatchData:0x81d2cf4>
> 
> Shouldn't the second one return nil?

I believe that Ruby's version of /m just makes . match \n (which it normally
doesn't); the ^ and $ always match around \n.   If you want to match the
beginning or end of the entire string use \A instead of ^ and \Z instead of
$.

-Mark