Jan Eden wrote:
John W. Krahn wrote on 23.03.2005:
This should work (untested)
while ($content =~ m#<h1>(.+?)</h1>(.+?)(?=<h1>|\z)#gs) {
and thanks. I tried Offer Kaye's first guess, too, and I think I
can explain why it does not work.
If you make the lookahead optional, the regex will try to match as
few characters as possible for the second parentheses - and since
the lookahead is optional, this will be only a single character.
You have to force a positive lookahead assertion to make sure $2
receives everything up to either the next <h1> or the end of the
string.
So the other suggestion works. Thank you! The reason I had not tried
that was the wrong assumption that alternations in
lookahead/lookbehind assertions had to be of the same length, like
in (?=abc|def), but not (?=abc|defg). But now I remember that the
whole lookahead/lookbehind has to be of a fixed length, so you cannot
use quantifiers.
lookahead CAN use quantifiers but lookbehind CANNOT.
John
--
use Perl;
program
fulfillment
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