From: Tammo Tjarks <tammo@...>
Date: 2007-09-08T17:50:05+09:00
Subject: compatibility in regexps between perl and ruby

Hello,
I try to translate some perl to ruby and assumed so far that the regexps are
compatible. But it seems that there are some only available in perl. 
Is there something comparable to
(?<!...)
also in ruby (is a zerowidth lookbehind, so
/(?<!test)moin/ would only match moin if no test preceeds.

Regards,
Tammo