From: brabuhr@...
Date: 2010-03-22T12:04:32+09:00
Subject: Re: A regexp?

On Sun, Mar 21, 2010 at 10:23 PM, Derek Smith
<derekbellnersmith@yahoo.com> wrote:
> I am parsing through /var/log/mail.log via regexp and I need to skip
> date lines that are NOT followed by to|from|connect.  Here is my code:
>...
>                ##p(line.chomp.scan(/^(.{15})\s+(\S+)\s+(\S+)\s+(.+)$/).first)
>                datestr = (line.chomp.scan(/^.{15}/))
>                mailmsg =
> (line.chomp.scan(/^.?connect\sto.*|to=.*|host.*$/))
>...
> The output of this code is below and I DO NOT want, can skip the output
> such as
> Mar 21 18:58:08
> Mar 21 18:58:08
> Mar 21 18:58:08
>...
> I only want ouput IF the date is followed by to=|connect\sto.*|host.*

I stuck your regex and data in rubular,check it out:

http://www.rubular.com/r/zhcQ1lccgp