Chas Owens wrote:
On 3/12/07, Chas Owens <[EMAIL PROTECTED]> wrote:
On 3/12/07, Chas Owens <[EMAIL PROTECTED]> wrote:
> The key here is "zero-width". These constructs do not consume any
> characters, so they must be combine with patterns that do:
>
> /^FOO(?!BAR).*?(BAZ)(?!BAR).*BAR/
>
However, this will only work if BAR directly follows FOO. This string
will still match:
FOO BAR BAZ 8 BAR
Bringing the anchors into the zero-width look ahead seems to solve that
problem.
/^FOO(?!.*?BAR.*?BAZ).*?(BAZ)(?!.*?BAR.*?BAR).*BAR/
That's a lot clearer to me, thanks. I'll take another look at the perlre
now I see what it's getting at.
--
Best wishes,
Dave Cardwell.
http://perlprogrammer.co.uk/
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