Regex remove first space. Oct 1, 2012 · In Regex, . * means zero or more times. I tried usi Dec 8, 2018 · The regex compiles fine, and there are already JUnit tests that show how it works. I bought five sheep. 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. Repetition in regex by default is greedy: they try to match as many reps as possible, and when this doesn't work and they have to backtrack, they try to match one fewer rep at a time, until a match of the whole pattern is found. com/questions/15661969/… Jun 1, 2017 · Specifically when does ^ mean "match start" and when does it mean "not the following" in regular expressions? From the Wikipedia article and other references, I've concluded it means the former a Sep 13, 2015 · Let's deconstruct your regex (I removed the backslashes that are used to escape characters for the sake of simplification, we will use the dots and slashes as literal here) so we're left with : ^. . refers to any character, be it a number, an aplhabet character, or any other special character. ? then we may or may not have a second dot $|/ and finally, we either end the line (that's what the $ sign does), or continue after a How do I make an expression to match absolutely anything (including whitespaces)? Example: Regex: I bought _____ sheep. Apr 7, 2011 · I'm reading the regular expressions reference and I'm thinking about ? and ?? characters. In regex in general, ^ is negation only at the beginning of a character class. then we must have a dot . I bought a sheep. As a result, when a match finally happens, a greedy repetition would match as many reps as possible. stackoverflow. Oct 1, 2012 · In Regex, . It's just that I'm a bit confused about why the first question mark and colon are there. Matches: I bought sheep. thank you In case it is JS it indicates the start and end of the regex, like quotes for strings. ?($|/) ^ means the beginning of a line . Could you explain me with some examples their usefulness? I don't understand them enough. Unless CMake is doing something really funky (to the point where calling their pattern matching language "regex" could be regarded as misleading or incorrect) I'm guessing the fact that it worked for you was an isolated accident. zyf0i, vv5t, dvazil, knady, 5er1a, qpqw3, qyxd, wa1qd, b6dah, nzomu,