Matches all ips that points to localhost like, optionally capturing port number: 127.X.X.X and 127.X.X.X:

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

This pattern validates all the possible dates for all months in YYYY-MM-DD format. Due to limitations of regex it can not validate the dates of february for leap year. It will allow the date 29 for leap year too. Make sure to validate that yourself.

This pattern parses the yowsup-cli message output to recover (otherwise lost) messages. Current yowsup version: v2.4

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 is the javascript equivalent that .NET uses in their server-side validators.

Brackets, Parentheses, Braces, delimited

4003447582444271

get src url from img tag in html

matches alphanumeric characters and apostrophes ex. Superman's Cape

move TTL field from route53 zone export from right to left to "IN A/CNAME"