Regular Expressions 101

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Community Patterns

1

Factorization: Zero, Unit, Primes, or Composite?

.NET 7.0 (C#)
Description Inspects lines that contain only a character, let's say c, repeated n times. The name of the matching groups will tell you if n is 0, the unit 1, a prime number, or a composite number. Alternative ...
Submitted by kevinhp - a month ago
2

Command line parser

.NET 7.0 (C#)
Supports parameters such as keys and values, also parameters enclosed in quotes.
Submitted by Pavel Bashkardin - 3 months ago (Last modified 3 months ago)
1

.NET CSV parser

.NET 7.0 (C#)
Parses CSV files using comma (,) as delimiter and double quote (") as quoted-field tag. Features: Respects empty fields, including at the beginning and at the end of the line Respects line breaks in quoted fields
Submitted by kevinhp - 3 months ago
1

IP address without local

.NET 7.0 (C#)
Matches IP addresses excluding local addresses
Submitted by pvl_zh - 4 months ago
1

Multiline CSS to one line CSS example (C#)

.NET 7.0 (C#)
Regex that will match/replace unnecessary whitespaces in CSS code.
Submitted by Puchkov Eugene - 5 months ago (Last modified 5 months ago)
1

Email Validation

.NET 7.0 (C#)
Basic email address validation example
Submitted by Jeff Mills - 6 months ago
1

password

.NET 7.0 (C#)
password validator
Submitted by anonymous - 6 months ago
1

Entity framework mappers

.NET 7.0 (C#)
This expression converts a modelbuilder to an IEntityTypeConfiguration class. Useful for tidying up the result of a scaffold operation.
Submitted by MK - 7 months ago (Last modified 7 months ago)
1

Госуслуги - сопроводительное письмо (недопустимые символы)

.NET 7.0 (C#)
Если вы подаёте электронное заявление через портал Госуслуг и набираете текст в стороннем редакторе, то при попытке отправить такое заявление может появиться ошибка о наличии недопустимых символов. С помощью этого регулярного выражения вы сможете найти недопустимые символы и скорректировать текст с...
Submitted by NG256 - 7 months ago
1

T-SQL find comments in script

.NET 7.0 (C#)
Finds the comments in a t-sql (tsql) script
Submitted by Paw Jershauge - 8 months ago
1

INI Parser

.NET 7.0 (C#)
This regular expression has the following features that make it a convenient tool for working with text data. (?=\S) Positive lookahead, trims leading whitespace in text block. (? ... ) Group for text block, which can be comment, section, entry, or undefined string. (? ... ) Group for comment. Incl...
Submitted by Pavel Bashkardin - 8 months ago (Last modified 3 months ago)
1

PrivtBank Receipt Parser

.NET 7.0 (C#)
PrivtBank Receipt Parser
Submitted by anonymous - 8 months ago (Last modified 8 months ago)
1

PrivtBank Receipt Parser vx520

.NET 7.0 (C#)
PrivtBank Receipt Parser vx520
Submitted by anonymous - 8 months ago (Last modified 8 months ago)
1

GS1 Transport Label (EAN-128) and parse the application identifiers datafields

.NET 7.0 (C#)
A regex to parse the GS1-128 transport / shipping label from multiple EAN-128. The Regex is generated from the offical GS1 specification will identify all datafields Like for example AI 00: Serial Shipping Container Code (SSCC) AI 01: Global Trade Item Number (GTIN) AI 02: Identification of trade i...
Submitted by anonymous - 8 months ago (Last modified 8 months ago)
1

.*(EXCEL[.]EXE).*(?i)(Maxicredito).*([.]xlsx - Excel)

.NET 7.0 (C#)
.(EXCEL[.]EXE).(?i)(Maxicredito).*([.]xlsx - Excel)
Submitted by anonymous - 10 months ago
1

ActivityWatcher

.NET 7.0 (C#)
sda
Submitted by anonymous - 10 months ago
1

Match all HTML heading elements and capture their titles

.NET 7.0 (C#)
Useful for matching/finding and capturing/extracting the titles of HTML heading elements. This was used to identify all heading elements within the body of a web page for the purposes of generating a Table of Contents for the page. Note: This expression could be altered for different HTML element ta...
Submitted by Darius Liktorius - 10 months ago
1

Initializing identifiers

.NET 7.0 (C#)
Initializing identifiers
Submitted by anonymous - a year ago
1

Simple URL validation

.NET 7.0 (C#)
Validates protocol, sub-domain, domain, and top-level domain. No port number and query string parameters validation is made.
Submitted by anonymous - a year ago
3

Placeholder resolving

.NET 7.0 (C#)
.Net regular expression for resolving placeholders in the format of ${rewriter(multilevel:key)?fallback} (+ variations)
Submitted by anonymous - a year ago
123...6

Community Library Entry

1

Regular Expression
Golang

`
^(?:(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\/(?:3[0-2]|[12]*\d)){0,1}[,|-])*(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\/(?:3[0-2]|[12]*\d)){0,1}$
`
gm
Open regex in editor

Description

Simple Regex to **validate ** (no extraction!) an IPv4 Range which can be a comma separated mixture of

  • IPv4 addresses
  • IPv4 CIDRs
  • IPv4 Ranges like 1.1.1.1-1.1.1.10

Examples :

192.168.1.1,255.255.255.255/32,10.10.10.10/24,0.0.0.0/24 192.168.1.1/32 192.168.1.1 192.168.1.1/32 192.168.1.1/12 192.168.1.1/24 192.168.1.1/24 192.168.1.1/0,192.168.1.1/0 10.0.0.0/24 172.16.0.1-172.16.0.255 192.168.1.1,10.0.0.1/24,172.16.0.1-172.16.0.10 64.33.232.212 64.33.232.210/24

Submitted by alucab - 22 days ago