Regular Expressions 101

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Community Patterns

1

camelCase -> snake_case

PCRE2 (PHP >=7.3)
Works with many forms of alphanumeric camelCase camelCase camel camelCaseCaseCase... (with as many words as you want) ca65melCase (ca65mel_case) camelCCase (camel_c_case)...
Submitted by inesvar - 10 months ago
1

PascalCase -> snake_case

PCRE2 (PHP >=7.3)
Works with many forms of alphanumeric PascalCase PascalCase Pascal PascalCaseCase Pascal684Case (pascal684_case) Pas45calCase (pas45cal_case)...
Submitted by inesvar - 10 months ago
1

simple email validator

PCRE2 (PHP >=7.3)
Email address validator
Submitted by anil - 10 months ago
1

Python logs parser (Airflow)

Python
Parser for individual row of log pattern for parsing row in format: [2023-03-11 00:00:07,377] {taskinstance.py:1088} INFO - Starting attempt 1 where: - time_full: [2023-03-11 00:00:07,377]...
Submitted by anonymous - 10 months ago
1

homework 1

PCRE2 (PHP >=7.3)
this is the answer for question 1
Submitted by Christian Thrige Nielsen - 10 months ago
1

Remove multiple forward slash from url

PCRE2 (PHP >=7.3)
(): This is a capturing group that matches any character except a colon :, and it captures this character for later use in the replacement. (/ {2,}): This part matches two or more consecutive forward slashes. The replacement part $1/ uses the captured character from the first part (which is any char...
Submitted by Apon Ahmed - 10 months ago (Last modified 10 months ago)
1

IPv4 address with optional CIDR suffix

ECMAScript (JavaScript)
Matches any valid IPv4 address with, optionally, a CIDR suffix. 0.0.0.0 to 255.255.255.255 and 1.1.1.1/0 to 1.1.1.1/32. Use the following regex if you don't want to allow the CIDR suffix. ...
Submitted by MAZ01001 - 10 months ago
1

Credit card regex

PCRE2 (PHP >=7.3)
Credit card name and surname with turkish char
Submitted by anonymous - 10 months ago
0

PLP redirection

PCRE2 (PHP >=7.3)
PLP redirection
Submitted by anonymous - 10 months ago
1

Regex to Match Regular Expression in JS/TS

PCRE2 (PHP >=7.3)
Matches regular expressions in JS/TS (EcmaScript) code including none or one of the flags g, i`, m, u, y`.
Submitted by Redu - 10 months ago
1

Match Single Line (//) Comments in JSON

PCRE2 (PHP >=7.3)
Doesn't get confused by the url values like "https://www.example.com" or "file:///some.txt"
Submitted by Redu - 10 months ago (Last modified 10 months ago)
1

username_unix.gamesave

PCRE2 (PHP >=7.3)
TILE_WIDTH = 2 # Includes space for padding and one space between tiles formatted_board = "" for i in range(rows): formatted_row = "" for j in range(columns):...
Submitted by robert paulson - 10 months ago (Last modified 6 months ago)
1

Estract download speed from Ookla Speedtest output

PCRE2 (PHP >=7.3)
surely can be optimized more, but it does the job and the interested number of lines is fairly low.
Submitted by anonymous - 10 months ago
1

111

PCRE2 (PHP >=7.3)
((?:[零一二三四五六七八九十百]+))$
Submitted by anonymous - 10 months ago
1

IANA Media Type

Java 8
Parses an IANA Media Type value. Doesn't seem to capture repeating parameters, which is a bit of an edge case but valid I think - any suggestions on how to fix would be appreciated.
Submitted by scottbdr - 10 months ago
1

Mediawiki History Dump filenames

Python
Matches filenames of MediaWiki history dumps.
Submitted by CristianCantoro - 10 months ago
1

loyal

PCRE2 (PHP >=7.3)
loyal
Submitted by anonymous - 10 months ago
1

named capture

PCRE2 (PHP >=7.3)
simple named capture
Submitted by Gene - 10 months ago
1

ipmitool sensor

PCRE2 (PHP >=7.3)
Parse stdout from ipmitool sensor
Submitted by anonymous - 10 months ago (Last modified 10 months ago)
1

تمرین اول

PCRE2 (PHP >=7.3)
تمرین اول مبانی پردازش گفتار انتخاب شماره هایی که با صفر یا +98 شروع شده انذ.
Submitted by mabani. - 10 months ago (Last modified 10 months ago)
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Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/
(\b(?'first_word'[a-z](?!([[:alnum:]]*_)(?# the word doesn't contain underscores))(?:[a-z0-9]*)))|(\G(?'trailing_word'[A-Z][a-z0-9]*))
/
gm
Open regex in editor

Description

Works with many forms of alphanumeric camelCase

  • camelCase
  • camel
  • camelCaseCaseCase... (with as many words as you want)
  • ca65melCase (ca65mel_case)
  • camelCCase (camel_c_case)

What isn't matched

  • PascalCase
  • words with '_' underscores in them (camel_Snake_Case)

Remarks

  • all 'lowercase' words are matched... but they're not changed by the regex !
Submitted by inesvar - 10 months ago