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- regex - How . * (dot star) works? - Stack Overflow
In Regex, refers to any character, be it a number, an aplhabet character, or any other special character * means zero or more times
- What does \d+ mean in a regular expression? - Stack Overflow
What does \d+ mean in a regular expression?\d is a digit (a character in the range [0-9]), and + means one or more times Thus, \d+ means match one or more digits For example, the string "42" is matched by the pattern \d+
- Regex: ?: notation (Question mark and colon notation)
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 - Regular Expression with wildcards to match any character . . .
Parentheses in regular expressions define groups, which is why you need to escape the parentheses to match the literal characters So to modify the groups just remove all of the unescaped parentheses from the regex, then isolate the part of the regex that you want to put in a group and wrap it in parentheses Groups are evaluated from left to right so if you want something to be in the second
- 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 well as "A9B", but the regex ^[0-9]$ only matches "9"
- 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 - Regular Expressions: Is there an AND operator? - Stack Overflow
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 regarded as misleading or incorrect) I'm guessing the fact that it worked for you was an isolated accident
- 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 diffe
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