Bob Apthorpe wrote:
Hi,
On Fri, 21 May 2004, Matthias Keller wrote:
Still writing some cool rules for my SA (and if they prove themself useful hopefully soon for everyone's SA) and I'm trying something like: match some word and if at some later position there's anything BUT this word, return true
I'm thinking about something like this: /([a-z]) [^\1]/i
This should for example match asdf fdsa asdf kdkd asdf asd
but NOT asdf asdf
Is that possible anyway?
Yes, but with a performance hit. Do you want:
/([a-z]+)\s+(?!\1\b)/
matches "asdf fdsa" matches "asdf kdkd" matches "asdf asd" doesn't match "asdf asdf" matches "asdf asdfg"
Hi Bob
Thanks for the advice. I found some documentation about it (never seen that ?! before :) ) BUT my perl seems to refuse those constructs...? I'm using Version 5.8.1 and when I do something like: perl -ne "print if /([a-z]+)\s+(?!\1\b)/" it produces:
bash: !\1\b: event not found
So I guess my perl is too old or something like this??
Matt
