Regex One-Liners

Regex one-liners are concise patterns used to match or manipulate strings. They are powerful tools for text processing and can be extremely useful in various scenarios. Below are some regex one-liners that you might find handy.

Common Regex One-Liners

Email Validation

^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$

This pattern checks if a given string is a valid email address.

URL Validation

^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$

This pattern checks if a given string is a valid URL.

Extract Numbers

\b\d+\b

This pattern matches any sequence of digits.

Remove Special Characters

[^a-zA-Z0-9 ]

This pattern matches any character that is not a letter, digit, or space, and you can replace it with replace() function in your code.

Find Duplicate Lines

^(.*\n).*\1

This pattern finds duplicate lines in a text.

More Resources

For more regex one-liners and detailed explanations, check out our Regex One-Liners page.

Regex Patterns