Regular Expressions 101

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Community Patterns

3

Hostname validation

Golang
Validates subdomain, root domain, and wild card domains
Submitted by AnonymousDapper - 8 years ago
3

Extract URL parts only named capturing groups

Golang
Extract URL parts only named capturing groups
Submitted by dixanms - 3 years ago
2

domain for Google Data Studio (re2 dialect)

Golang
Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want
Submitted by anonymous - 8 years ago
2

Mikrotik firewall logs

Golang
Matching for mikrotik ROS 7 Used in promtail and grafana
Submitted by anonymous - a year ago (Last modified a year ago)
1

get video id from youtube link

Golang
no description available
Submitted by RyuaNerin - 9 years ago (Last modified a year ago)
1

Siebel Id

Golang
no description available
Submitted by anonymous - 8 years ago
1

Domain validation regex suitable for user input

Golang
This regexp can be used to validate domain names in Golang. While it cannot enforce the 253 character limit (with optional trailing period not included) that can be easily done by a simple len(domain) <= 253 check as well. This can be used as-is in other languages, even with RE2 regex engine. If po...
Submitted by Alexander Dupuy - 5 years ago
1

Extract columns names from any select query

Golang
This regex can capture any column name from a select query. Be the original name, like are named on table, renamed with a reserved word AS or even without explicit AS. Go on, and test with your query ;)
Submitted by Jefferson Gouveia - 6 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

Traefik stripprefixregex for web apps

Golang
Notes: Do not forget to escape the $ by an additional $. Escaping ? like \? does not work. But you could use [?] instead End result should be like this: "traefik.http.middlewares.r6tt-dev-web.stripprefixregex.regex=^/[a-z0-9/]+[a-z0-9]+([?]+.*)?$$"...
Submitted by anonymous - 4 years ago
1

Flexible box

Golang
no description available
Submitted by anonymous - 4 years ago
1

Lxx Wurzel

Golang
no description available
Submitted by anonymous - 4 years ago
1

windows file name from full path

Golang
Find all string matches with dir, one or more subdir, file name with optional extension. Common example with all capturing groups included: C://ProgramFiles/MyDir1/myDir2/file.ext
Submitted by anonymous - 4 years ago
1

Unix file with full path

Golang
Find all string matches with dir, one or more subdir, file name with optional extension. Common example with all capturing groups included: ../../dir/SubDir1/SubDir2/file.ext ...
Submitted by anonymous - 4 years ago
1

^(?:\d+[a-z]|[a-z])(?:\^\d+)(?:[\+|\-])(?:\d+[a-z])(?:[\+|\-])(?:\d+\=\d+)

Golang
for quadratic equations ||ax^2+bx+c=d||
Submitted by anonymous - 4 years ago
1

Valid email regexp in Go

Golang
A regexp to validate an email address according to https://html.spec.whatwg.org/#valid-e-mail-address . Note that the backslash in the name part of the regexp on that site is there to escape the forward slash, which is not needed in Go.
Submitted by markus@maragu.dk - 3 years ago
1

utf-8 char in imap mail

Golang
Check golang for presence of utf-8 char in rawEmail e.g. ?= =?UTF-8?Q? or =?3D?UTF-8?Q?
Submitted by oscarunix - 3 years ago
1

Traefik - MDW to add slash

Golang
Used in Traefik to add slash
Submitted by juranir.santos@gmail.com - 3 years ago
1

lsblk-output-regex

Golang
Trying to adapt this regex to support LVM.
Submitted by anonymous - 3 years ago
1

yyyy/mm/dd

Golang
^(((\d{3}[1-9]|\d{2}[1-9]\d|\d[1-9]\d{2}|[1-9]\d{3})(\/)(((0[13578]|1[02])(\/)(0[1-9]|[12]\d|3[01]))|((0[469]|11)(\/)(0[1-9]|[12]\d|30))|(02(\/)(0[1-9]|[1]\d|2[0-8]))))|(((\d{2})(0[48]|2468|13579)|((0[48]|2468|3579)00))(\/)02(\/)29))$ Match year/month/day format. e.g: 2020/02/29 [match] 2021/02/29 ...
Submitted by mayl0421 - 3 years ago
123...10

Community Library Entry

0

Regular Expression
ECMAScript (JavaScript)

/
^[A-Z](([A-Z]{1,2}[a-z0-9]+)+([A-Z]{1,3}[a-z0-9]+)*[A-Z]{0,3}|([a-z0-9]+[A-Z]{0,3})*|[A-Z]{1,2})$
/
gm
Open regex in editor

Description

To be proper pascal case a word with digits allowed and with upto 3 upper case letters, a word:

  • MUST start with an upper case alphabet (A through Z)
  • MUST have no spaces, punctuation or special characters
  • CAN have at most 3 uppercase alphabets in a row
  • CAN end in an uppercase alphabet

Notable examples

  • Camel01CC01 is valid pascal case with digits allowed and with upto 3 upper case letters
Submitted by anonymous - 2 years ago