Parses countries list from https://countrycode.org/

Takes any valid CSS and minimizes it, removing comments and whitespace. Can be called with something like PHP's preg_replace() to dynamically minimize css files.

RegExp to match that user has entered at least 2-letters (including international letters) in a field

Not perfect, but better than none.

Adopted one of answers from: http://stackoverflow.com/questions/5948051/regex-extract-twitterusername-from-url

Matches the URL from the text to 95 percentage

Teléfonos del territorio de España. Se admiten teléfono de 9 cifras que empiecen por 9, 7 ó 6. Opcionalmente puede tener el prefijo de país siendo válidas las siguientes opciones: (+34) (0034) +34 0034 ...

Get Gmail tag, user and domain of an email address

This allows to the programer to match the time format groups, in a way that allow to discard some parts of the format. E.g. I have a format HhMmSs and i want to ignore the 'Ss' part from the format when I have no Seconds

Extracts lines with i18 prefix from text

Local variable and function parameter names should comply with a naming convention

Based on http://www.regular-expressions.info/creditcard.html This example includes test strings. This only validates the pattern, and not whether the credit card number passes a checksum validation. See the Luhn algorithm for details https://en.wikipedia.org/wiki/Luhn_algorithm...

Switches the order of two functions in a parameter.

Given a number N represented by its unary form N(1), when RegEx doesn't match N(1), N is prime