This simply checks if the string is not empty spaces.

Original credit for this expression goes to: https://emailregex.com/

check the code

Need to FULLY Break Out EVERY Component of a URL? Like, as in "every constituent element individually accessible in its own named capture group?" Need it to be pre-optimized and fully ECMA-compliant? Want to see exhaustive unit tests proving these claims (144 are included; all 144 execute in 6.5ms. ...

HGVS Nomenclature Check for ClinVar Submissions

0x28C6A6DdF8fF8A47A90A69bfE75cd89904a14d71

This works against a list of hyperlinks from the 'USS Marmora (1862)' article You can include File: pages by removing the File:| from the regex. I could improve how the remaining query for urls containing index.php, for now I recommend splitting in your chosen programming language. ...

A regex to find if a postcode is in Auckland region (New Zealand)

ECMAScript simple regex for email validation

Match emoji in emoji-zwj-sequences.txt

emoji-test.txt

Validates that a given string is a number of up to 15 integer digits and up to 2 decimal digits. Group separators could be either comma or space class but can't be mixed. Decimal separator could be either comma (if comma was not a group delimiter) or dot. This variation uses small captures for mode...

Matching for mikrotik ROS 7 Used in promtail and grafana

Case insensitive (of course) All words can all be separated by nothing, spaces, periods, slashes, dashes, or underscores. (So "PO Box 123", "P.O. Box 123", "PO-Box 123", "PO_Box123", etc. all match.) Some valid abbreviations are P/Post/Postal, O/Off/Office, and B/Box/Bx/Bin (as well as N/No/Num/Numb...

(.)\/\/(.)

Pattern matching and extracting color code formats using RegEx. https://github.com/Kyza/color-regex/

Not only validates valid date/time, but also the number of days in a month (including leap year), and both Z and UTC offset.

text has numbers

Matches the data sent by the twitch IRC and captures into various groups

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