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♥♦ Regular Expressions (aka Regex) by examples for Java developers

Q1 How will you go about implementing the following validation rules for a user name? — user name must be between 2 and 17 characters long. — valid characters are A to Z, a to z, 0 to 9, . (full-stop), _ (underscore) and – (hyphen) — user name must

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Regular Expressions interview Q&A for Java developers

Q1 What’s the difference between a wildcard and a regular expression? A1 A wildcard is a generic term referring to something that can be substituted for all possibilities. In computer terms, usually a simple “wildcard” is just a * that can match one or more characters, and possibly a ?…...

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