Meta-characters. There are special characters in regular expressions, some of them include: d matches any digit, equivalent to [0-9]; D matches any character that’s not a digit, equivalent to ...

Regular expressions are as complicated as they are powerful. They can be very intimidating in the beginning, so the best way to start is to take an example and tweak it until you produce exactly ...

Regular expressions (regex) are powerful tools for form validation in web applications. They enable you to define patterns that input must match, allowing you to ensure data consistency.