Regular Expressions 101

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Regular Expressions 101

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1
pcre

Polynomials regex

Decompose polynomials of type +/- NUMBERx ^ NUMBER
Submitted by anonymous - 7 years ago
1
pcre

Positive lookahead

finds the first bar (Find "bar" which has "bar" after it)
Submitted by anonymous - 7 years ago
1
pcre

positive lookahead and positive lookbehind

Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...
Submitted by anonymous - 7 years ago
1
pcre

POSITIVE LOOK AHEAD AND POSITIVE LOOK BEHIND

Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...
Submitted by anonymous - 7 years ago
1
pcre

Positive Look ahead and Look Behind

Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...
Submitted by Rajesh - 7 years ago
1
pcre

Atomic group

Atomic Groups are non-capturing and once a match is made will exit the atomic group and throw away all backtracks. Use Atomic Groups for optimising performance. A non-atomic expression \b(foobar|foot|foo)\b and a test string of foots will: match foo of foobar => fail and backtrack to the 2nd alter...
Submitted by anonymous - 7 years ago
1
pcre

hastags shortcuts

This regexp is used in the SPIP cms for create tags fastly when you are writting a post.
Submitted by pierre.laszczak@gmail.com - 7 years ago
1
python

ConnectionStringServerDatabase

Extract the server and database name from SQL Server connection string
Submitted by Davos - 7 years ago
1
pcre

Lines file First and Last Node

no description available
Submitted by anonymous - 7 years ago
1
pcre

Java

no description available
Submitted by anonymous - 7 years ago
1
pcre

pohe no nubmer valdiation

no description available
Submitted by anonymous - 7 years ago
1
pcre

CR with no LF or PG at the end

Match lines with CR (Carriege Return) with no LF (Line Feed - New Line) or PG (Page Break) next to it.
Submitted by Hans Mauricio Burbano E - 7 years ago
1
python

Find label

Find label in MIPS assembly
Submitted by Dlavoieb - 7 years ago
1
pcre

Non Capturing Group

It won't capture in the group.we can't back refrence A(?:nt|pple)\sA\1
Submitted by anonymous - 7 years ago
1
pcre

Empty ini section title

kust like [*]
Submitted by CWFF - 7 years ago
1
pcre

asd

no description available
Submitted by anonymous - 7 years ago
1
pcre

DD Addresses

no description available
Submitted by anonymous - 7 years ago
1
pcre

Panel Mark

no description available
Submitted by Hoss - 7 years ago
1
python

kalem pattern 2

no description available
Submitted by anonymous - 7 years ago
1
pcre

bitcoin 1.00000000 minimum

no description available
Submitted by anonymous - 7 years ago
1...454455456457458459460...572

How to document a Regex? Example 2

Vote

1

Regular Expression
pcre

/
((?# Capturing group for the type name) \/+(?# Start with / or // ) [^\/\[\]]+(?# Type name exclusing start of attribute and next type) (?:(?# Non-capturing group for the attribute) \[(?# Start of an attribute) [^\]']*(?# Anything but end of attribute or start of string) (?:(?# non-capturing group for string) '(?# string start) [^']*(?# anything inside the string, except end of string) '(?# string end) )(?# end of string group) \](?# end of attribute) )?(?# Attribute can occur 0 or one time) )+(?# Type can occur once or many times)
/
Open regex in editor

Description

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Submitted by Thomas - 8 years ago