This regex matches only when all the following are true: password must contain 1 number (0-9) password must contain 1 uppercase letters password must contain 1 lowercase letters password must contain 1 non-alpha numeric number...

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

extract video id, index, play list id from youtube url

RegEx email /^((?!\.)[\w-_.]*)(@\w+)(\.\w+(\.\w+)?)$/gim; Just playing with Reg Ex. This to validate emails in following ways ...

Matches all valid IP addresses from 0.0.0.0 to 255.255.255.255

Allows inserting expiry date as MM/YYYY or MM-YYYY format

used to parse timezone in the format -08:00 or +05:30

Extracts values of the form £nnn,nnn.nn or $nnn.nnn from text

Validates IPv4 IP Address

The secret of the Twitterverse.

Checks that a password has a minimum of 6 characters, at least 1 uppercase letter, 1 lowercase letter, and 1 number with no spaces.