Regular Expressions 101

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Community Patterns

-3

Match substitutions

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 - 10 years ago
-3

Matches percentage with any number of digits

Python
Only captures value for converting percentage to decimal. Returns empty if percentage but no value. no match = no percentage found
Submitted by sharkey - 9 years ago
-3

TD data from html table

Python
no description available
Submitted by Deepak Bansal - 9 years ago
-3

IPv4 address

Python
Matches any IPv4 address
Submitted by anonymous - 9 years ago
-2

example

Python
match
Submitted by anonymous - 10 years ago
-2

Basic grammar for regex matching of simplistic Makefiles

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> - 10 years ago
-2

eee

Python
no description available
Submitted by anonymous - 10 years ago
-2

link

Python
no description available
Submitted by NTP-[SADAS] - 10 years ago
-2

five word capture

Python
no description available
Submitted by anonymous - 10 years ago
-2

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

Python
no description available
Submitted by kali - 10 years ago
-2

python bracketed text

Python
why doesn't this match text in brackets?
Submitted by anonymous - 10 years ago
-2

Host and domains

Python
no description available
Submitted by anonymous - 9 years ago
-2

IPv4

Python
allows for all legal IPv4 addresses
Submitted by anonymous - 9 years ago
-2

twitter usernames

Python
no description available
Submitted by anonymous - 9 years ago
-2

finds the instance of two or more repeating letters

Python
no description available
Submitted by cp0153 - 9 years ago
-2

checklists item

Python
checklists item
Submitted by Tobias Hochgürtel - 9 years ago
-2

filter

Python
no description available
Submitted by anonymous - 9 years ago
-2

Validation of code ATECO Italian

Python
/* -- This is a RegEx for validating one Italian ATECO code. -- For original specification visit: http://www.istat.it/it/archivio/17888 -- Valid: */ 1...
Submitted by Marco Tonchella with the help of this Comunity that thanks a lot. - 9 years ago
-2

Prosed OFX DateTimeType pattern for v.2.1.1+

Python
no description available
Submitted by Oleg Sakharov karpuscul@gmail.com - 9 years ago
-2

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

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 - 9 years ago
123...105

Community Library Entry

1

Regular Expression
.NET 7.0 (C#)

@"
^(?:(?<Number>)(?<Prime>(?<SmallestFactor>(?<char>.)\<char>+?))(?:\<SmallestFactor>+(?<-Prime>(?=)))?(?!\<char>)(?<-char>)(?(Prime)(?<-SmallestFactor>)(?<-Number>)|(?<Composite-Number>))|(?<Unit>.)|(?<MustUseTheSameCharacter>.+))$|(?<Zero>^$)
"
gm
Open regex in editor

Description

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

Removing the outermost anchors ^ and $ from the first (and very large) alternate group will do the same but, instead of inspecting per line, it will inspect any repetition of a character (line breaks, obviously, stop repetitions).

^(?: ...... )$|(?<Zero>^$)

to

(?: ...... )|(?<Zero>^$)
Submitted by kevinhp - a month ago