On Feb 26, Boris Shor said: >$e1 = ','; >$aye =~ s/(?<!($e1))\s/\n/g; > >So this expression replaces spaces with newlines except when they are >immediately preceded by a comma. But when I change > >$e1 = ',|R\.' > >(English: comma or "R."), I get "Variable length lookbehind not implemented >in regex"
Because ',' and 'R\.' match 1 and 2 characters, so the lookbehind is NOT a constant width. You'd need to do s/(?:(?<!,)|(?<!R\.))\s/\n/g; I think you might just want to do s/(,|R\.)\s/$1\n/g; -- Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/ RPI Acacia brother #734 http://www.perlmonks.org/ http://www.cpan.org/ CPAN ID: PINYAN [Need a programmer? If you like my work, let me know.] <stu> what does y/// stand for? <tenderpuss> why, yansliterate of course. -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
