Regular Expressions 101

Order By

Sponsors
There are currently no sponsors. Become a sponsor today!

Community Patterns

1

advent of code 2024 day3

Golang
regex of challenge
Submitted by Marcell Martini - 25 days ago (Last modified 24 days ago)
1

Paragraph Delimiter Counter (Unicode-Aware)

.NET 7.0 (C#)
Finds all paragraphs in the input text, where a paragraph is defined as any occurrence of a non-whitespace character immediately following any of the following and any other preceding whitespace: 2 or more consecutive CRLF sequences 2 or more consecutive CR characters 2 or more consecutive LF cha...
Submitted by dodexahedron - 24 days ago (Last modified 24 days ago)
1

Imiona i nazwiska

PCRE2 (PHP >=7.3)
Imiona i nazwiska
Submitted by anonymous - 20 days ago (Last modified 17 days ago)
1

quote-OBprefix

ECMAScript (JavaScript)
Frequently-used prefix regex expressions with quote form in Obsidian plugins.
Submitted by YaoYYoung - 19 days ago (Last modified 19 days ago)
1

OBprefix

ECMAScript (JavaScript)
Frequently-used prefix regex expressions without quote form in Obsidian plugins.
Submitted by anonymous - 19 days ago (Last modified 19 days ago)
1

prevent double zeros

ECMAScript (JavaScript)
prvent double zeros also decimals
Submitted by bilal - 18 days ago
1

Parse EPICS Substitution files

PCRE2 (PHP >=7.3)
Extracts the file name and substitution pattern for each entry in an EPICS substitution file. See https://docs.epics-controls.org/projects/base/en/latest/msi.html#dbloadtemplate-format for a description of the file format being parsed
Submitted by Giles Knap - 18 days ago
1

js-br

ECMAScript (JavaScript)
teste
Submitted by anonymous - 16 days ago
1

Discord emoji & Markdown links

Rust
NOTE The word text is used to substitute all alphanumeric characters as well as underscores ([a-zA-Z0-9_]). Captures: ...
Submitted by anonymous - 14 days ago (Last modified 14 days ago)
1

Hexadecimal

ECMAScript (JavaScript)
Only matches if the entire string is in hexadecimal format
Submitted by anonymous - 13 days ago
1

punctuation detector

PCRE2 (PHP >=7.3)
removes punctuation
Submitted by anonymous - 11 days ago
1

Regex for Validating Egyptian Mobile Numbers with Specific Operator Codes

PCRE2 (PHP >=7.3)
This regular expression is designed to validate Egyptian mobile phone numbers by ensuring they conform to the following format: Country Code: The number must start with +20, representing Egypt's international dialing code. Mobile Networks: (Vodafone: 10, e&:11, Orange:12, we:15) Operator Code: The ...
Submitted by Mohamed Amir - 10 days ago
1

[React TypeScript] - Unnecessary backticks

ECMAScript (JavaScript)
Matches string properties that unnecessarily use backticks in React components. NOTE: This regex ignoes backtick strings that contain BOTH quotes (") AND single quotes (') but it WILL match backtick strings with ONLY quotes or ONLY single quotes! Keep this in mind if you want to use substitution! ...
Submitted by Nathanthanthan - 9 days ago (Last modified 9 days ago)
1

[React TypeScript] - Unnecessary brackets around strings

ECMAScript (JavaScript)
Matches string properties that unnecessarily use brackets in React components. NOTE: If you're looking to harmonise your quote usage, use this substitution input: $1"$3$4" ...
Submitted by Nathanthanthan - 9 days ago (Last modified 9 days ago)
1

Quality Value, RFC 9110 HTTP Semantics.

ECMAScript (JavaScript)
To extract the Quality Value (qvalue) according the RFC 9110 HTTP Semantics specifications from the weight of HTTP headers elements, like: Accept-Language Accept Accept-Charset Accept-Encoding TE...
Submitted by Daniel D'Leon - 8 days ago
1

Comprehensive URL Validation Regex

Python
This regex pattern is designed to validate URLs with the following key features: Protocol Support: Optionally matches http:// or https://. Subdomain Handling: Supports optional www. and valid subdomains. Domain Name Validation: Ensures proper formatting of domain names: Prevents double hyphe...
Submitted by Hadi Mousavi - 5 days ago
1

Mermaid brackets

Python
Mermaid brackets are enclosed in inverted commas for validity
Submitted by myaitree - a day ago
1

Markdown Titles

Python
increase the head level of the markdown titles - that is add extra #.
Submitted by myaitree - a day ago
1

ChatGPT multiline expressions for Obsidian Latex

Python
convert the multiline expressions into obsidian latex compatible. That is add - $$...$$
Submitted by myaitree - a day ago
-3

Select a HTML table and all its innerHTML

PCRE (PHP <7.3)
no description available
Submitted by @ixzy24 - 10 years ago
1...323324325326327...902

Community Library Entry

1

Regular Expression
ECMAScript (JavaScript)

/
\s*;\s*[qQ]=(?<qvalue>(?:0(?:\.\d{1,3})?)|(?:1(?:\.0{1,3})?))\b
/
g
Open regex in editor

Description

To extract the Quality Value (qvalue) according the RFC 9110 HTTP Semantics specifications from the weight of HTTP headers elements, like:

  • Accept-Language
  • Accept
  • Accept-Charset
  • Accept-Encoding
  • TE
  weight = OWS ";" OWS "q=" qvalue
  qvalue = ( "0" [ "." 0*3DIGIT ] )
         / ( "1" [ "." 0*3("0") ] )
Submitted by Daniel D'Leon - 8 days ago