Build, test, and debug regular expressions
This regex matches dimension values formatted as 'Length x Width' (e.g., 10x20 or 10,5 x 20,5) where a comma is used as the decimal separator. It extracts the numeric values into 'l' and 'w' named capture groups and allows for optional whitespace and text around the numbers. It is highly useful for parsing product dimensions in European formats from textual data.