Web Reference: This page describes the syntax of regular expressions in Perl. If you haven't used regular expressions before, a tutorial introduction is available in perlretut. Jul 11, 2025 · So to provide that facility, a regex cheat sheet is created which contains the different classes, Characters, modifiers etc. which are used in regular expression. When learning regexes, or when you need to use a feature you have not used yet or don't use often, it can be quite useful to have a place for quick look-up. I hope this Regex Cheat-sheet will provide such aid for you. Introduction to regexes in Perl. a Just an 'a' character. Any character except new-line.
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