Regex to validate a string that is RFC3339 compliant in JavaScript. RFC3339: https://www.rfc-editor.org/rfc/rfc3339. Expands upon: https://regex101.com/r/qH0sU7 by adding named capture groups for coding best practices.

Matches palindromes: arbitrary length ignores non-significant characters (spaces, ponctuation) ignores accents, provided the text is NFD-normalized recursive palindromes (e.g. "a été à"): either match the longest one ("a été à") or the nested ones individually ("a", "été", "à") (see comment)

Phone number for all countries. Valid symbols: ( ), -, whitespace

Get ip address (only ipv4) Validator

validates against multiple common formats

ISD Codes for Phones Matches the basic format for ISD Codes.

Accomodate for Discord's username changeover and match against either the old username or the new username. But only one or the other. Match: CesarHvl#9000 cesarhvl cesar.hvl...

A simple parser to exact all the components of a URI/URL as named groups

pega a data e time

Matches protocol, domain, port, path, query and anchor as named capturing groups.

Phone numbers in Belgium. The pattern does match with delimiters such as [\s./-] No global length is checked Accepts number starting by 0 for local dialing Accepts number starting by + (+32 in these tests)

You can use this regular expression to identify any type of Telegram link. It doesn't matter whether it is t.me or telegram.me. Links including "joinchat" are also accepted.

IDN Domains & Normal Domains This regex is able to identify any type of domain or subdomain whether it is IDN or normal, this includes domains in emojis, non-Latin characters, etc.

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

Matching for mikrotik ROS 7 Used in promtail and grafana

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...

POSIX ERE compatible, suitable for usage in Bash [ testing Attributions Derived from [regex101: RFC1918 - Private IPv4 addresses by 0100101101001.

https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file Integer value zero, sometimes referred to as the ASCII NUL character. Characters whose integer representations are in the range from 1 through 31, except for alternate data streams where these characters are allowed. For more info...

Regular expression to check the email syntax validity. Certainly requires improvement, but it's a good basis to work from. Work with Java and JavaScript.

CRON validation Validates CRON pattern (Quartz) and supports groups. Useful for e.g. typescript or other typed languages. The following greoups are covered: second...