Regular Expressions 101

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Community Patterns

1

advent of code 2024 day3

Golang
regex of challenge
Submitted by Marcell Martini - 11 hours ago (Last modified 11 hours ago)
1

Advent of code 2024 day 3 step 2

PCRE2 (PHP >=7.3)
https://adventofcode.com/2024/day/3 I am wondering if there's a way to have mul do and don't appear under the same group
Submitted by anonymous - 20 hours ago (Last modified 20 hours ago)
1

Valid US State Abbreviations

PCRE2 (PHP >=7.3)
Unlike the community regexes that just check if the field is two alpha digits, this checks the content for the actual US state abbreviation.
Submitted by NY4I - 21 hours ago
1

ARRL Sections

PCRE2 (PHP >=7.3)
Finds valid ARRL sections
Submitted by NY4I - a day ago
1

Parse Cabrillo Amateur Radio Contest QSO line (CQWW - Zone Exchange)

PCRE (PHP <7.3)
Parses the QSO line of the Amateur radio contest log file format called Cabrillo. This handles the CQ World-wide contest exchange format of RS[T] and a zone. It would be a starting point for other exchanges like ARRl Field Day or another one with spaces in the exchange. This does handle either a QSO...
Submitted by NY4I - a day ago (Last modified a day ago)
1

AOC 2024 D3 regex

Rust
The regex to be used in both parts of adventofcode.com 2024 day 3 puzzle
Submitted by dragmine149 - a day ago
1

aws resource

Python
matches aws resources (arn:aws) strings
Submitted by anonymous - 2 days ago
1

lore accuraten't email parser fetcher detective

PCRE2 (PHP >=7.3)
this will run in any flavor but python in regex101. based on wikipedia bugs: local part can have more than 64 chars if we abuse . or other things
Submitted by fbd_1 - 5 days ago (Last modified an hour ago)
1

URI(or URL) parser

PCRE2 (PHP >=7.3)
A fully? complete Uniform Resource Identifier/Locator parser for all your need. it should support theses flavors with some changes or by using a different delimiter: PRCE2/PRCE, ECMAscript and should be able to support RUST, JAVA, GOLANG, .NET flavors with ease. for PYTHON, I don't really know.
Submitted by fbd_1 - 5 days ago (Last modified 2 hours ago)
1

Canadian Postal Code Validation

ECMAScript (JavaScript)
Postal code format validation based on Canada Post Addressing Guidelines Accepts optional space or hyphens
Submitted by usrrname - 6 days ago (Last modified 6 days ago)
1

Extract links from text

PCRE2 (PHP >=7.3)
Extract links from text simple as that.
Submitted by anonymous - 7 days ago
1

Telephone number validation

PCRE2 (PHP >=7.3)
This validates any mobile or landline phone number in the world.
Submitted by kdesilva - 9 days ago
1

Repeated characters

PCRE2 (PHP >=7.3)
remove repeated characters from a string
Submitted by Vishal Kumar - 9 days ago
1

Regex for Matching Documentation Websites

ECMAScript (JavaScript)
Regex for Matching Documentation Websites This repository contains a powerful regular expression designed to match URLs that commonly point to documentation-related websites. The regex is optimized for flexibility, covering various terms and URL patterns. Regex Pattern ...
Submitted by jgeofil - 10 days ago
1

CIMTS business situation

PCRE2 (PHP >=7.3)
just playing around
Submitted by Jeremiah - 11 days ago
1

Any Unicode dash or its HTML escaped version

ECMAScript (JavaScript)
Match any of the weird dashes people figure out how to put in their data
Submitted by anonymous - 14 days ago (Last modified 14 days ago)
1

simple email checker

PCRE2 (PHP >=7.3)
sees if it is a proper email or not
Submitted by anonymous - 15 days ago
1

Finite automata Definition

PCRE2 (PHP >=7.3)
Parses and groups elements inside the definition of a finite automaton, defined by the following backus naur form state ::= [a-zA-Z]+ set_of_final_states ::= "final states" = {state} simbol ::= [a-zA-Z]...
Submitted by viktorashi - 15 days ago
1

Finite automata definition

PCRE2 (PHP >=7.3)
parses and groups elements inside the definition of a finite automaton, defined by the following backus naur form state ::= [a-zA-Z]+ set_of_final_states ::= "final states" = {state} simbol ::= [a-zA-Z]...
Submitted by anonymous - 15 days ago
1

Set of Finite Automata final states

PCRE2 (PHP >=7.3)
it parses and groups the final states of a finate automaton
Submitted by viktorashi copil borfashi - 15 days ago
123...901

Community Library Entry

1

Regular Expression
PCRE (PHP <7.3)

/
(?:X-)?QSO:\s+([0-9]*)\s+(DG|RY|PH|CW|FM)\s+(\d\d\d\d-\d\d-\d\d)\s+(\d\d\d\d)\s+[A-Z0-9\/]{3,15}\s+(.*)\s*([A-Z0-9\/]{3,15})\s+(.*)\s{1,}[0|1]
/
gm
Open regex in editor

Description

Parses the QSO line of the Amateur radio contest log file format called Cabrillo. This handles the CQ World-wide contest exchange format of RS[T] and a zone. It would be a starting point for other exchanges like ARRl Field Day or another one with spaces in the exchange. This does handle either a QSO: tag or an X-QSO: tag for deleted X-QSO entries.

Submitted by NY4I - a day ago (Last modified a day ago)