regex - Carets in Regular Expressions - Stack Overflow
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 …
Regex: ?: notation (Question mark and colon notation)
Dec 8, 2018 · The regex compiles fine, and there are already JUnit tests that show how it works. It's just that I'm a bit confused about why the first question mark and colon are there.
regex - What are ^.* and .*$ in regular expressions? - Stack Overflow
In case it is JS it indicates the start and end of the regex, like quotes for strings. stackoverflow.com/questions/15661969/…
regex - How to match "any character" in regular expression?
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 …
regex - Question marks in regular expressions - Stack Overflow
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 …
regex - Regular Expressions- Match Anything - Stack Overflow
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 …
Regex that accepts only numbers (0-9) and NO characters
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 …
regex - Match linebreaks - \n or \r\n? - Stack Overflow
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 …
regex - What's the difference between () and - Stack Overflow
The regex [a-z] will match any letter a through z. The () construct is a grouping construct establishing a precedence order (it also has impact on accessing matched substrings but …
OR condition in Regex - Stack Overflow
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 …