Regular Expressions 101

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Regular Expressions 101

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-1
javascript

North America - US - N11 Service Number - e.164 compliant/non-compliant

This expression can be used for identifying if a string (such as a dialed number using a cloud based telephony service) matches one of the known North American US N11 Service Numbers. It will match if the number is in e.164 format or not, and only matches when the string begins and ends with the des...
Submitted by Benjamin Dean - 6 years ago
-1
javascript

get only ids

no description available
Submitted by anonymous - 6 years ago
-1
javascript

Passwords

no description available
Submitted by anonymous - 6 years ago
-1
javascript

Discord Emojis

no description available
Submitted by anonymous - 6 years ago
-1
javascript

balanced parenthesis match

break the code to first opening parenthesis and then closing use the groups individually not entirely . This is 40% correct online pattern but mixing it with first open then close groups in two different matches result in 100% success
Submitted by Muhammed - 5 years ago
-1
javascript

sorry guys - uploaded by fat fingers and can't delete

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

Email validation

no description available
Submitted by anonymous - 5 years ago
-2
python

phone number

An extremely complete regex, that... Accepts international phones and most of regional phone numbers; Accepts phone numbers with/without "+", with/without space or "-" in the middle of the phone, and more. Gets groups of all important data of the phone number (local code, country code and the phone ...
Submitted by @thegamerbr1 - 7 years ago
-2
javascript

email regexp

no description available
Submitted by anonymous - 6 years ago
-2
javascript

non-negative integer

repeat ... refactor
Submitted by jay johnson - 9 years ago
-2
javascript

email

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

Select ID from regex101 URL

no description available
Submitted by Vinay - 9 years ago
-2
javascript

Regex to select text withing square brackets.

no description available
Submitted by Dhrubajyoti Gogoi - 9 years ago
-2
javascript

Header `Link` validator

no description available
Submitted by Vaseker - 9 years ago
-2
javascript

Matching HTML attributes

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

example

match
Submitted by anonymous - 9 years ago
-2
python

Basic grammar for regex matching of simplistic Makefiles

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> - 9 years ago
-2
javascript

Regex for 1 to 100 with or without decimal values

no description available
Submitted by Ved - 9 years ago
-2
python

eee

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

valid windows file name

no description available
Submitted by Mitacha - 8 years ago
1...269270271272273274275...277

Username with "_" "-"

Vote

12

Regular Expression
javascript

/
^(?=.{3,20}$)(?![_.-])(?!.*[_.-]{2})[a-zA-Z0-9_-]+([^._-])$
/
Open regex in editor

Description

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Submitted by Gianvy - 7 years ago