Checks for valid UK/British postcodes. There was another on here that had for some reason been upvoted, but it was actually incorrect as it worked on none of my valid own postcodes! Namely that it assumed two letters and a number (BS3) when you can have variations (M20). Allows for an optional spac...

Finds the outermost pair of parentheses. Compatible with any amount of nesting

Handles commands like in CMD

Match nth occurence of the patterns in the inner parenthesis. Put nth that you want to match in the curly braces (here, {3}).

Text output produced by reading the QR code present on patient stickers created by Epic (R) medical record software

This regex matches against season and series names

To get a variable name from a source code: The variable name is before the '=' (equal sign) This is the way to detect. Problem: Only 1 variable can get from 1 line. Unfortunately, this can get variable between after "//" and before ";" too. I made this for fake script debugger. Just get variable fr...

Usage: "40%".replace(/\b([\d\.]+)mkb%/ig, '$1')

Validates hexadecimal color codes based on the following rule set: Optionally starting with a hash. 3 or 6 characters in length. Using the [0-9a-f] character set.

Valid and Invalid emails

validator voor kenteken vb: 11-AA-BB

Matches version strings.

Validates that a DNS hostname is well-formed only. You will still need to check that the overall length of the hostname, including the implied trailing "." (if not present), does not exceed 255 bytes.

Match a MasterCard with new range for 2017: 51-55 and 2221-2720 @incarnated

Cloud Flare

email format control

Validates CPA (Código Postal Argentino, spanish for Argentinian Postal Code).