This is an example for stackoverflow

Covering Dates starting from year 2009 and older in French and English Some of the valid Dates format April 2nd 2008 April 2 2008 April 02 2008...

Every valid line will be of the form: . . . NOTE: the distribution tag is expected to start with at least one letter and be followed by at least one digit.

Regular expression ^(?:https?:)?(?:\/\/)?(?:+@)?(?:www\.)?(+) used below extracts domain with subdomains out of a full url. It skips protocol (ex: https:), "//", "@", www subdomain and then captures everything (ex: domain) before ":" or "/" or end of line.