Be aware that the first ^ in this answer gives the regex a completely different meaning: It makes the regular expression look only for matches starting from the beginning of the string.

How do I make an expression to match absolutely anything (including whitespaces)? Example: Regex: I bought _____ sheep. Matches: I bought sheep. I bought a sheep. I bought five sheep. I tried usi...

Apr 7, 2011 · I'm reading the regular expressions reference and I'm thinking about ? and ?? characters. Could you explain me with some examples their usefulness? I don't understand them enough. thank …

Jul 5, 2009 · How do I use regular expressions in ANSI C? man regex.h does not provide that much help.

By putting ^ at the beginning of your regex and $ at the end, you ensure that no other characters are allowed before or after your regex. For example, the regex [0-9] matches the strings "9" as well as …

Feb 24, 2023 · For reference, from regular-expressions.info/dot.html: "JavaScript and VBScript do not have an option to make the dot match line break characters. In those languages, you can use a …

While writing this answer, I had to match exclusively on linebreaks instead of using the s-flag (dotall - dot matches linebreaks). The sites usually used to test regular expressions behave diffe...

Oct 5, 2008 · The RegEx of accepted answer returns the values including their sourrounding quotation marks: "Foo Bar" and "Another Value" as matches. Here are RegEx which return only the values …

In regex in general, ^ is negation only at the beginning of a character class. Unless CMake is doing something really funky (to the point where calling their pattern matching language "regex" could be …

Aug 18, 2010 · What is also important there is that regex with non-capturing groups (?: is much faster than the same regex with capturing groups ' ('. So we should use non-capturing groups when we …