A fully tested regex that extracts and validates date parts using named capturing groups. \ Validations: Year must be preceded by nothing or a non-digit character...

Just a little regex for the tailwind css color classes, It could be improved.

captura los diferentes tipos de URLs de protocolo HTTP

[0-9]{1,2}:0-9\s[aApP]\.[mM]\.*

FIIs related content about dividend yield exposed by one website

[0-9]{1,2}:0-9\s[aApP]\.[mM]\.*

Verbose, somewhat cryptic and very efficient pattern to match all text inside of quotes and MySQL identifier tokens.

Validación de correo UNAL Validación del correo de la universidad Nacional mediante el uso de expresiones regulares.