From: "R. Joseph Newton" <[EMAIL PROTECTED]> > Reposted as new thread: > > [Note: I am reposting this as a new message, in order to start a new > thread. Please remember to use the new message command, rather than a > reply, when starting a new subject. For many of us with threaded > browsers, your message got lost way out on an unrelated > thread.--Joseph] > > Hi all > Just for fun (really no context) i was wondering how to create regular > expressions that will never match any string. > > /^[^\w\W]/ is one of them am I right? No string can start with a > character that is neither alphanumeric nor nonalhanumeric.
How do you like this one? /(?=a)(?=b)/; You can use any characters instead of the "a" and "b" as long as they are different (and not wildcars). Jenda ===== [EMAIL PROTECTED] === http://Jenda.Krynicky.cz ===== When it comes to wine, women and song, wizards are allowed to get drunk and croon as much as they like. -- Terry Pratchett in Sourcery -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>