Why the results from running exactly the same regular expression twice are different?
427
Why does a RegExp with global flag give wrong results?
146367
Umlauts in regexp matching (via locale?)
23494
How to make  grep display only the matching regexp?
34481
Emacs - regular expressions in Lisp need to be double-escaped - why?
140142
How can I replace a backslash with a double backslash using RegExp?
82022
Regular Expression for finding double characters in Bash
152230
Short example of regular expression converted to a state machine?
111925
What's the difference between !, %, and @ in replacement tokens?
45334
How can I debug a regular expression in Python?
113604
Why does this regex with no special character match a longer string?
14398
How to grep-inverse-match and exclude "before" and "after" lines
26063
How to use a variable inside a regular expression?
9011
R regular expressions: unexpected behavior of "[:digit:]"
123652
Returning only part of match from Regular Expression
90532
Regex matches but shouldn't
47106
How to match all occurrences of a regex
118209
How can I match multiple occurrences with a regex in JavaScript similar to PHP's preg_match_all()?