Regular Expressions 101

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Community Patterns

1

look ahead and look behind

ECMAScript (JavaScript)
find number in string with look behind and look ahead
Submitted by anonymous - 5 years ago
1

Python:Match paragraphs separated by URL

Python
no description available
Submitted by anonymous - 5 years ago
1

Modern Chrome User Agent

PCRE (PHP <7.3)
Detects modern Chromium-based browsers Chrome >= 67 YaBrowser >= 18.7 Opera >= 54 Samsung Internet >= 9.2...
Submitted by slavafomin - 5 years ago
1

Modern Firefox User Agent

PCRE (PHP <7.3)
Detects modern Firefox browser versions Firefox >= 60 These versions require only ~29.33 KB of core-js polyfills.
Submitted by slavafomin - 5 years ago
1

Modern Safari versions User Agent

PCRE (PHP <7.3)
Detects modern Safari versions by User Agent string Safari & iOS Safari >= 10 These browsers require ~62 KB of core-js polyfills.
Submitted by slavafomin - 5 years ago
1

22 Jimmy

PCRE (PHP <7.3)
.+\.{a-z}+$ / .+\.{a-z}+$...
Submitted by anonymous - 5 years ago
1

Replace many spaces to one

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 5 years ago
1

Another X / Extra X / X more

Python
Extract phrases meaning "add X more of the previous item"
Submitted by anonymous - 5 years ago
1

Wordless Date Validation

PCRE (PHP <7.3)
Validate and capture different dates without words for example: dd/mm/yyyy, d/m/yy, yyyy-mm-dd, yy-mm-dd
Submitted by anonymous - 5 years ago
1

URL with port and hash

PCRE (PHP <7.3)
URL with port and hash
Submitted by anonymous - 5 years ago
1

Exclude extension from file basename

PCRE (PHP <7.3)
Description Exclude extension from file basename - get filename only! BASENAME = FILENAME.EXTENSION
Submitted by Cober@Axterbach - 5 years ago
1

IPv4 private CIDR range RFC1918

Golang
Validates that you provide a CIDR in one of the following valid ranges. 0.0.0 – 127.255.255.255 127.0.0.0/8 0.0.0 – 10.255.255.255 10.0.0.0/8 16.0.0 – 172. 31.255.255 172.16.0.0/12 192.168.0.0 – 192.168.255.255 192.168.0.0/16...
Submitted by David Stockton - 5 years ago
1

Exclude subdirs from URL

PCRE (PHP <7.3)
Excludes certain subdirs unless they contain specific valid patterns
Submitted by anonymous - 5 years ago
1

Iranian Mobile Numbers

PCRE (PHP <7.3)
Iranian Mobile Numbers By: EmIT (Seyed Emad Armoun) www.EmadArmoun.ir
Submitted by anonymous - 5 years ago
1

Audio filename splitter

Python
This Python regex allows you to split an audio filename with the sintax Authors - Title (Text1) [Text2].extension into: Group 1: Authors Group 2: Title Group 3: Text1 Group 4: Text2 Group 5: .extension...
Submitted by Eche L.A. - 5 years ago
1

Match what we don't want, to replace with empty

PCRE (PHP <7.3)
This was necessary for cases such as the Amazon Settlements reports To import these, we concatenate many file into one. The header in this concatenated file is reapeated as many times as files were concatenated. We have seen that is there are no sales with a promotion for a determined period, the fi...
Submitted by anonymous - 5 years ago
1

Name,last name, first name, full name

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 5 years ago
1

H codes in string PHP

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 4 years ago
1

capture production

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 5 years ago
1

Capture digits and extension of North American phone number (North American Numbering Plan)

PCRE (PHP <7.3)
strips Country Code 1 &/or token **strips separators **strips separators **strips extra digits in vanity phone numbers strips extension delimiter ${ext} or ${4} captures n-digit extension
Submitted by anonymous - 5 years ago
1...768769770771772...902

Community Library Entry

1

Regular Expression
Python

r"
(([-+])?[.,]\b(\d+)(?:[Ee]([+-])?(\d+)?)?\b)|(?:([+-])?\b(\d+)(?:[.,]?(\d+))?(?:[Ee]([+-])?(\d+)?)?\b)
"
gm
Open regex in editor

Description

Matches:

  • integers [+-]?\d+([Ee][+-]?\d+)? like +45 or 96E-3 or -12e+24
  • floats starting from "." or "," like -.45e-3
  • floats starting from \d like 3.14 or -0.67E12
Submitted by anonymous - 5 years ago