Matches any IPv4 address

Only captures value for converting percentage to decimal. Returns empty if percentage but no value. no match = no percentage found

Match regular expressions substitutions, I personally use this to perform my validate if it is a substitution, then call re.sub() on it.

The regex to match a single pro forma modification with all its intricacies.

An extremely complete regex, that... Accepts international phones and most of regional phone numbers; Accepts phone numbers with/without "+", with/without space or "-" in the middle of the phone, and more. Gets groups of all important data of the phone number (local code, country code and the phone number itself)

Full email validation with optional "." "-" "_"

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Awesome explanation of nested lookbacks

matches only those commas that are between sets, or between members of a set. does not match commas that are inside members.

/* -- This is a RegEx for validating one Italian ATECO code. -- For original specification visit: http://www.istat.it/it/archivio/17888 -- Valid: */ 1 01 01.2 01.02 01.02.3 01.02.03 // Not Valid: a asc 0123 012.3 013.456 123456 01/02/03

checklists item

allows for all legal IPv4 addresses

why doesn't this match text in brackets?

This expression should both normal and wildcard targets and rules wrapped in simple sub-shell or varriable substitution enclosures.

match

This regex checks if c/c++ code contains char buffer that is later printed.

Regex to check if a string is a discord mention

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guif

Matches with either the month or abbreviated 3 letter month name. No matching groups used

Log: Bluecoat Event Type: Upstream Ref to Json: "Sources/Bluecoat/ipv4-2

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

Validates all possible international phone number formats. Icludes almoust all of the international call prefixes, all of the differing lenghts of country codes. The parts of number will always be recognised correctly. Additionally you could add limitations of the phone number's lenght

email validation based on the restrictions for entering email adresses into a mongo db email field.

Looks for string formated like an IP address.

This regex matches java line end comments started with "//" and ignores such ones that are within String literals. (NO SUFFICIENT TESTING WAS DONE TO GUARANTEE 100% SAFETY)

match bibtex entries