3 ms·
If you know what . does, various repetition markers (*,+,?,{}), and character classes, you're 90% there. Back-references are another big portion, although that
by thedufer 10y ago
If you know what . does, various repetition markers (*,+,?,{}), and character classes, you're 90% there. Back-references are another big portion, although that's admittedly where things start getting a bit complex.