How to Write a Clean Regular Expression for Data Validation

A Regular Expression (commonly known as RegEx or RegExp) is a specialized sequence of characters that forms a search pattern to find, validate, or manipulate text. Think of it as a standard “Find and Replace” tool but equipped with superpowers, allowing you to search for complex patterns rather than just literal words. Core Components of RegEx

RegEx is constructed using a mix of literal characters and special characters (called metacharacters). Understanding Regular Expressions (Regex) | by Joy Victor