Regular Expressions 101

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Learn to code interactively with bite-sized, hands-on programming challenges.

Community Library

83

Distinguish torrent files (series vs movies)

Created·2014-06-26 09:59
Updated·2023-07-20 15:08
Type·Match
Flavor·Python
A neat regex for finding out whether a given torrent name is a series or a movie. Returns the full name of the series with the separator needed to make it pretty (ie, replace it with space or what you want). Also returns the season number or the year for the movie/series, depending on what was previously matched.
Submitted by Firas Dib
3

phone

Created·2015-05-07 17:14
Type·Match
Flavor·Python
matches: + example: +52 33 3884 7720 +1 770 343 5788
Submitted by miqui
9

Extract Protocol, URL, URL Path, get parameters and hash from URI

Created·2014-05-22 23:34
Type·Match
Flavor·Python
This is simplified from my last submission.
Submitted by Dale O'Brien
1

Regular expression to remove all puncutation

Created·2014-06-20 07:18
Type·Match
Flavor·Python
Removes all of the puncutation present inlcuding \n,\t,\r
Submitted by Abhinav Gupta
7

CSS Import

Created·2014-05-03 00:51
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
9

domain - host

Created·2015-09-29 17:50
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-3

Matches percentage with any number of digits

Created·2015-06-10 19:26
Type·Match
Flavor·Python
Only captures value for converting percentage to decimal. Returns empty if percentage but no value. no match = no percentage found
Submitted by sharkey
-2

Between two strings

Created·2015-10-27 19:18
Type·Substitution
Flavor·Python
Awesome explanation of nested lookbacks
Submitted by OnlineCop
1

dd/mm/yyyy validation regexp

Created·2015-09-17 10:54
Type·Match
Flavor·Python
no description available
Submitted by uknnown
-1

woop

Created·2015-02-15 22:12
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-3

Match substitutions

Created·2014-07-26 13:32
Type·Match
Flavor·Python
Match regular expressions substitutions, I personally use this to perform my validate if it is a substitution, then call re.sub() on it.
Submitted by Zarthus
1

Parse a HTML URL

Created·2014-05-22 23:07
Type·Match
Flavor·Python
Break a URL into parts: protocol url path get parameters hash
Submitted by Dale O'Brien
-3

TD data from html table

Created·2015-12-24 10:15
Type·Match
Flavor·Python
no description available
Submitted by Deepak Bansal
-2

Email Validation

Created·2015-12-01 22:35
Type·Match
Flavor·Python
Full email validation with optional "." "-" "_"
Submitted by Jakub Stasiak
0

Get any word before specific string

Created·2015-09-05 06:41
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
2

postgesql

Created·2015-08-11 09:45
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
8

repeat group match

Created·2015-07-24 21:02
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
1

REGEX

Created·2015-04-04 13:58
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
4

Complete imgur link regex

Created·2015-03-13 11:26
Type·Match
Flavor·Python
This regex grabs all kinds of imgur links and groups them in meaningful names aswell. This way you have full flow-control in your python-scripts.
Submitted by Mio
-2

Basic grammar for regex matching of simplistic Makefiles

Created·2014-08-13 01:11
Type·Match
Flavor·Python
This expression should both normal and wildcard targets and rules wrapped in simple sub-shell or varriable substitution enclosures.
Submitted by Robert Butler <me@r-butler.net>
3

date time

Created·2014-01-29 03:45
Type·Match
Flavor·Python
1/Jul/2013 03:27:12
Submitted by himel
-1

Twitter #hashtags

Created·2013-10-17 17:40
Type·Substitution
Flavor·Python
Using the twitter API, take a tweet object and find & link #tags to embed in HTML
Submitted by @triplec1988
-3

IPv4 address

Created·2016-04-06 17:12
Type·Match
Flavor·Python
Matches any IPv4 address
Submitted by Anonymous
-2

adsf

Created·2015-11-01 11:11
Type·Match
Flavor·Python
adfadfad
Submitted by Anonymous
-2

finds the instance of two or more repeating letters

Created·2015-07-10 19:34
Type·Match
Flavor·Python
no description available
Submitted by cp0153
-2

IPv4

Created·2015-06-19 13:07
Type·Match
Flavor·Python
allows for all legal IPv4 addresses
Submitted by Anonymous
-2

Host and domains

Created·2015-06-10 18:44
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
3

Twitch URL Regex

Created·2015-03-15 12:53
Type·Match
Flavor·Python
Can grab all kinds of valid twitch URLs.
Submitted by Mio
-2

python bracketed text

Created·2015-01-27 21:53
Type·Substitution
Flavor·Python
why doesn't this match text in brackets?
Submitted by Anonymous
-1

text beetween text

Created·2015-01-23 10:35
Type·Match
Flavor·Python
no description available
Submitted by karol
-2

match only words consisting of 3 repeated letters, e.g. lllkkk

Created·2014-12-21 19:38
Type·Match
Flavor·Python
no description available
Submitted by kali
-2

five word capture

Created·2014-11-28 04:40
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-2

link

Created·2014-10-06 11:34
Type·Match
Flavor·Python
no description available
Submitted by NTP-[SADAS]
0

Find email address in a string.

Created·2014-06-11 17:57
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
1

quoted string in VB.net format

Created·2014-05-20 11:06
Type·Substitution
Flavor·Python
Get all strings in vb.net format (even nested quotes"
Submitted by Alan Moore (http://stackoverflow.com/questions/2148587/finding-quoted-strings-with-escaped-quotes-in-c-sharp-using-a-regular-expression) modified by j
1

IPv4 extraction

Created·2014-04-04 13:05
Type·Match
Flavor·Python
no description available
Submitted by Jacob
-2

match unescaped quotes

Created·2015-11-05 21:28
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-1

Integer or decimal number

Created·2015-10-30 12:30
Type·Match
Flavor·Python
no description available
Submitted by Rick de L
-2

match commas between sets or members, but not inside members.

Created·2015-10-23 16:41
Type·Match
Flavor·Python
matches only those commas that are between sets, or between members of a set. does not match commas that are inside members.
Submitted by Amrit Kohli
-1

xml

Created·2015-09-30 05:38
Type·Substitution
Flavor·Python
no description available
Submitted by Anonymous
-2

Prosed OFX DateTimeType pattern for v.2.1.1+

Created·2015-09-06 02:10
Type·Match
Flavor·Python
no description available
Submitted by Oleg Sakharov karpuscul@gmail.com
5

Find consecutive duplicate words

Created·2015-08-31 22:17
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-1

IP address

Created·2015-08-31 20:41
Type·Match
Flavor·Python
Looks for string formated like an IP address.
Submitted by Anonymous
-1

word_to_match

Created·2015-08-28 12:00
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-1

Java single line comment matcher

Created·2015-08-26 21:21
Type·Match
Flavor·Python
This regex matches java line end comments started with "//" and ignores such ones that are within String literals. (NO SUFFICIENT TESTING WAS DONE TO GUARANTEE 100% SAFETY)
Submitted by Janis Schöck
-1

bibtex entries

Created·2015-08-21 21:46
Type·Match
Flavor·Python
match bibtex entries
Submitted by Sixue Qin
-2

filter

Created·2015-07-18 07:55
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-2

twitter usernames

Created·2015-07-10 11:15
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-1

date format for year 2000 above

Created·2015-06-18 14:50
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
9

English date in "dd mmmm yyyy" format

Created·2015-05-18 19:41
Type·Match
Flavor·Python
Parse an English date following the "dd mmmm yyyy" format.
Submitted by Tantale

Community Library Entry

0

Regular ExpressionOpen Workspace

/
^cron\(([\W\w\D\d]+)\)$
/
gm

Description
Created·2022-04-26 20:50
Type·Match
Flavor·JavaScript

Matches the expression inside the "cron()" expression of a SSM Window.

Submitted by Jean Nussenzveig
Open Workspace