Are you familiar with regular expressions?

Yes, regular expressions (regex) — are a powerful tool for searching and processing text based on patterns. They allow you to describe complex search rules, such as validating email formats, extracting phone numbers, replacing parts of strings, etc.

Example of a simple regular expression for email validation:

^[\w.-]+@[\w.-]+\.[a-zA-Z]{2,}$

Where:

• ^ and $ — start and end of the string
• [\w.-]+ — one or more letters, digits, dots, or hyphens
• @ — at symbol
• \. — dot
• [a-zA-Z]{2,} — domain with at least two letters

Regular expressions are widely used in testing for data validation, log parsing, and automation.