On Fri, 6 Feb 2004, Bob Apthorpe wrote:
> So you want to match an address in the To field where the domain is
> 'newsguy.com' and the user is anyone except 'reader', correct?
>
> Will this work?:
>
> header To_Newsguy_Not_Reader To =~ /(?<!reader)[EMAIL PROTECTED]/i
> describe mesg to newsguy recipient but not reader
> score To_Newsguy_Not_Reader 6
>
> where (?<! ... ) is a zero-width negative look-behind assertion, a
> somewhat obscure bit of perl arcana found with 'perldoc perlre', which
> is written in some kind of crazy moon language.
Using it in limited space (such as a specific header) is OK, just
avoid it for general body matching. The negative look-behind matching
can be a performance killer.
--
Dave Funk University of Iowa
<dbfunk (at) engineering.uiowa.edu> College of Engineering
319/335-5751 FAX: 319/384-0549 1256 Seamans Center
Sys_admin/Postmaster/cell_admin Iowa City, IA 52242-1527
#include <std_disclaimer.h>
Better is not better, 'standard' is better. B{
