In case it is JS it indicates the start and end of the regex, like quotes for strings. stackoverflow.com/questions/15661969/…

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 …

59 That regex "\\s*,\\s*" means: \s* any number of whitespace characters a comma \s* any number of whitespace characters which will split on commas and consume any spaces either …

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 …

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 …

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 …

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 …

Apr 13, 2013 · Note that your regex would have worked too if it was written as \d \w|\d instead of \d|\d \w. This is because in your case, once the regex matches the first option, \d, it ceases to …

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

Aug 7, 2008 · Regex Syntax Summary How Regexes Work JavaScript Regular Expressions Footnote †: The statement above that . matches any character is a simplification for …