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 …

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...

Javascript RegExp () allows you to specify a multi-line mode (m) which changes the behavior of ^ and $. ^ represents the start of the current line in multi-line mode, otherwise the start 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...

Nov 13, 2021 · How do I create a regular expression to match a word at the beginning of a string? We are looking to match stop at the beginning of a string and anything can follow it. For example, the …

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 …

I am trying to use a regular expression validation to check for only decimal values or numeric values. But user enters numeric value, it don't be first digit "0" How do I do that?

Sep 30, 2011 · Note: "zero width" means if the \b is within a regex that matches, it does not add any characters to the text captured by that match. ie the regex \bfoo\b when matched will capture just …

I need to extract from a string a set of characters which are included between two delimiters, without returning the delimiters themselves. A simple example should be helpful: Target: extract the

May 14, 2019 · I need a regex which will allow only A-Z, a-z, 0-9, the _ character, and dot (.) in the input. I tried: [A-Za-z0-9_.] But, it did not work. How can I fix it?