lhunath 1182637649 learn Perl Compatible Regular Expressions: http://perldoc.perl.org/perlre.html greycat 1536074442 forget greycat 1536074479 learn Perl-Compatible Regular Expressions (not actually 100% perl-compatible) -- see https://www.regular-expressions.info/pcre.html and http://perldoc.perl.org/perlre.html