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- regex - What does ?= mean in a regular expression? - Stack Overflow
May I know what ?= means in a regular expression? For example, what is its significance in this expression: (?= *\\d)
- regex - Carets in Regular Expressions - Stack Overflow
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
- 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
- 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 - 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 - Matching up to the first occurrence of a character with a . . .
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
- regex - Question marks in regular expressions - Stack Overflow
@VaradBhatnagar You would need to escape the ? character in your regular expression As an example in Clojure, if you wanted to match the string foo?, you could use (re-find #"foo\?" "foo?") where \? escapes the question mark in the regular expression so that it is treated literally, rather than as a regular expression operator
- regex - Regular Expression to find a string included between two . . .
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
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