Wiktor Stribiżew
156
reputation
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[Why is this regex allowing a caret?][3]
[How Negative Lookahead Works](http://stackoverflow.com/questions/31201690/find-word-not-followed-by/31201710#31201710) ([more here](http://stackoverflow.com/questions/32886477/regexp-find-numbers-in-a-string-in-any-order/32886855#32886855))
[Backtracking with greedy/lazy/possessive quantifiers][4]
[Why `=` or `"` breaks PHP regexp when using `\b`?][5] (not only related to PHP)
[Why `^` and `$` do not work with an alternation like `^a|b$` correctly?][6]
[Unrolling the loop regex technique][7]
**Python 2 (and 3) Unicode regex issues**: [Answer 1][8], [Answer 2][9] *(Japanese!)*, [Answer 3][10] *(Hebrew!)*
Common Regex Issues
[Ensuring `b` doesn't come between `a` and `c`][2][Why is this regex allowing a caret?][3]
[How Negative Lookahead Works](http://stackoverflow.com/questions/31201690/find-word-not-followed-by/31201710#31201710) ([more here](http://stackoverflow.com/questions/32886477/regexp-find-numbers-in-a-string-in-any-order/32886855#32886855))
[Backtracking with greedy/lazy/possessive quantifiers][4]
[Why `=` or `"` breaks PHP regexp when using `\b`?][5] (not only related to PHP)
[Why `^` and `$` do not work with an alternation like `^a|b$` correctly?][6]
Common Language Specific Regex Issues
[JavaScript `String#match` with global flag does not return captured texts](http://stackoverflow.com/a/32652772/3832970)[Unrolling the loop regex technique][7]
**Python 2 (and 3) Unicode regex issues**: [Answer 1][8], [Answer 2][9] *(Japanese!)*, [Answer 3][10] *(Hebrew!)*