* isn't working, set the "dot matches newlines, too" option (or use (?s). So if . Another option that only works for JavaScript (and is 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. * means zero or more times. As a result, when a match finally happens, a greedy repetition would match as many reps as possible. * match anything, ? non-greedily (match the minimum number of characters required) - [1] [1] The reason why this is needed is that otherwise, in the following string: whatever whatever something abc something abc by . Dec 8, 2018 · The regex compiles fine, and there are already JUnit tests that show how it works. * match anything, ? non-greedily (match the minimum number of characters required) - [1] [1] The reason why this is needed is that otherwise, in the following string: whatever whatever something abc something abc by Oct 1, 2012 · In Regex, . refers to any character, be it a number, an aplhabet character, or any other special character. ^ match start of line . thank you If you're looking to capture everything up to "abc": /^(. Could you explain me with some examples their usefulness? I don't understand them enough. stackoverflow. It's just that I'm a bit confused about why the first question mark and colon are there. *?)abc/ Explanation: ( ) capture the expression inside the parentheses for access using $1, $2, etc. Oct 1, 2012 · In Regex, . *\\d). *). Apr 7, 2011 · I'm reading the regular expressions reference and I'm thinking about ? and ?? characters. This means "match any number of characters that are either whitespace or non-whitespace" - effectively "match any string". com/questions/15661969/… Oct 15, 2009 · May I know what ?= means in a regular expression? For example, what is its significance in this expression: (?=. Normally the dot matches any character except newlines. 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 In case it is JS it indicates the start and end of the regex, like quotes for strings. If you're using JavaScript, which doesn't have a "dotall" option, try [\s\S]*. 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.

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