javascript - What is the need for caret (^) and dollar symbol ($) in . . . Javascript RegExp () allows you to specify a multi-line mode (m) which changes the behavior of ^ and $ ^ represents the start of the current line in multi-line mode, otherwise the start of the string $ represents the end of the current line in multi-line mode, otherwise the end of the string For example: this allows you to match something like semicolons at the end of a line where the next
regex - What is the difference between . *? and . * regular expressions . . . 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 As a result, when a match finally happens, a greedy repetition would match as many reps as possible
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 sheep I tried usi
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 - Whats 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 that's a bit more of an advanced topic)
regex - Question marks in regular expressions - Stack Overflow 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 them enough thank you