Use this Regex for server-side validation also with some slight modifications like so for .NET -- @\w+([-+.']\w+)@\w+([-.]\w+)\.[a-zA-Z0-9]{2,6}(-.{2,6})*;

This regex matches roman numbers from 1 (I) to 3999 (MMMCMXCIX)

Validates Multiple email addresses seperated by comma.

Validating comma delimited strings for whitespaces & extra commas -- +(,()+){0,}

For string splitting / deconstructing

This regex is to match Ascending or descending order of 8 digit number

By inserting this regex in a programming language to test it against Codeforces 1800A you'll solve the task

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Matches all valid, current UK Postcodes, including Girobank and non-geographic postcodes, irrespective of whether they contain a space. It does not include overseas territories. Adapted from the BS7666 postcode rules at http://www.cabinetoffice.gov.uk/govtalk/schemasstandards/e-gif/datastandards/add...

Its a regex expression that matches with severals allowed kinds of emails.Enjoy it.

Matches, line by line, a comma separated list of decimal numbers with comma as decimal character (Spanish way) Produces a list of comma separated pairs (space separated innermost) of decimal numbers with point as decimal character (English way)

Arabic AlphaNumeric text

Regular Expression to validate NIC of Sri lankna (National Identity Card)

This expression can be used for identifying if a string (such as a dialed number using a cloud based telephony service) matches one of the known North American US N11 Service Numbers. It will match if the number is in e.164 format or not, and only matches when the string begins and ends with the des...