Regular Expressions 101

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2

Discord IP Blocker

Created·2025-01-24 23:48
Updated·2025-01-24 23:56
Type·Match
Flavor·Rust
Blocks IPs that are sent in discord. Will block any IP, even if the numbers aren't in valid ranges (like 327.19.8.79) Has basic protections against whitespace
Submitted by Bee3D
2

Discord emoji & Markdown links

Created·2024-12-14 18:33
Updated·2024-12-14 18:36
Type·Match
Flavor·Rust
NOTE The word text is used to substitute all alphanumeric characters as well as underscores (a-zA-Z0-9_]). Captures: [x] [text (the text in the parentheses doesn't get scanned) x] [text x] :text: Doesn't capture: [ ] [ ] [text] [ ] [text ] [ text ] [ text [ ] : text: [ ] :text : [ ] : text :
Submitted by Anonymous
2

Discord Anti-Advertisement 2

Created·2023-12-18 13:25
Updated·2024-01-23 15:38
Type·Match
Flavor·Rust
Pair this with my Discord AutoMod Anti Advertisement for full protection against invites. Use this with Discord's Built In AutoMod.
Submitted by dogknife
2

Discord Anti Advertisement

Created·2023-12-17 20:34
Updated·2024-01-23 17:37
Type·Match
Flavor·Rust
Discord AutoMod Regex Use this Regex with Discord's built-in automod to prevent all invite URLs. This will block discord.gg/ad but not .gg/ad Consider seeing my "strict" version otherwise.
Submitted by dogknife
2

Discord AutoMod Advert (Strict)

Created·2023-12-17 01:36
Updated·2024-01-23 17:37
Type·Match
Flavor·Rust
Use this with Discord automod. Bear in mind, this is "Strict" because it will block discord.gg/myad AND other links such as dsc.gg/myad
Submitted by dogknife
2

Rust Phone Number

Created·2023-10-23 21:47
Type·Match
Flavor·Rust
not fully featured, but simple.
Submitted by Jakersnell
1

Keep Talking and Nobody Explodes - Passwords

Created·2025-07-18 05:15
Type·Unit Tests
Flavor·Rust
See the chapter On the Subject of Passwords in Bomb Defusal Manual
Submitted by prprnya
1

AOC 2024 D3 regex

Created·2024-12-03 11:28
Type·Match
Flavor·Rust
The regex to be used in both parts of adventofcode.com 2024 day 3 puzzle
Submitted by dragmine149
1

Discord Server Invite, Rust RegEx

Created·2024-06-26 07:33
Type·Match
Flavor·Rust
A regular expression for Rust that matches against Discord server invite URLs, but not those without an actual code present. This may be used in Discord's AutoMod feature as it supports up to 10 Rust regular expressions per custom rule.
Submitted by sepruko
1

JS/TS imports of external dependencies

Created·2024-06-25 08:26
Type·Match
Flavor·Rust
This regex can be used on a JavaScript/TypeScript file to find imports from third-party packages. This is useful for determining what to put in dependencies/peerDependencies. This is a Rust regex, which makes it easy to use with rg (ripgrep). Pro tip: combine rg with sort -u to get a list of all packages for your JS/TS project! Based on a similar PCE2 regex
Submitted by Nikita Karamov
1

"fake" markdown link detection

Created·2024-04-25 18:42
Updated·2024-04-26 18:15
Type·Match
Flavor·Rust
This regex catches markdown links where the display text is also a link, like this: \example.com in order to prevent people getting tricked and clicking on a link that isn't what it says it is. See the test string for a much longer explanation with examples.
Submitted by Osh
1

Rust type-like ident casing

Created·2023-11-04 19:35
Type·Match
Flavor·Rust
Matches built-in primitives and identifiers with casing conventionally used for type/constant names.
Submitted by Neel Yadav
1

Prometheus Exposition metric line

Created·2023-05-30 09:41
Type·Match
Flavor·Rust
Prometheus exposition metric line format. Parses metric lines with named capture groups for metric name, labels, value, and timestamp. Excludes comment, type, and help lines. https://prometheus.io/docs/instrumenting/exposition_formats/#line-format
Submitted by james-jra
1

Get python function declaration

Created·2023-05-01 17:57
Type·Match
Flavor·Rust
Gets the python function declarations
Submitted by Anonymous
-2

rustyms: pro forma single modification

Created·2023-06-21 21:59
Type·Match
Flavor·Rust
The regex to match a single pro forma modification with all its intricacies.
Submitted by Douwe Schulte
0

Unicode Hexadecimal

Created·2023-05-17 21:24
Updated·2023-05-17 21:52
Type·Match
Flavor·Rust
Find hexadecimal numbers using Extended Unicode Support.
Submitted by Anonymous
-1

Grep from A to B

Created·2021-01-03 13:38
Updated·2023-07-25 15:34
Type·Match
Flavor·Rust
no description available
Submitted by Anonymous

Community Library Entry

0

Regular ExpressionOpen Workspace

/
\b (?!\p{Lu}+\b) # CaMeL can't be an ALLCAPS (remove to allow) (?=\p{L}*\p{Ll}) # CaMeL word should have at least 1 lowercase letter (?=\p{L}*\p{Lu}) # CaMeL word should have at least 1 uppercase letter (?!\p{Lu}\p{Ll}*\b) # CaMeL word can't be `Xxxx` or `X` \p{L}+ # CaMeL word should contain at least 1 letter \b
/
gx

Description
Created·2016-06-13 08:01
Type·Match
Flavor·PCRE (Legacy)

The PCRE (or any regex flavor supporting word boundaries, Unicode properties and lookaheads) \b(?!\p{Lu}+\b)(?=\p{L}\p{Ll})(?=\p{L}\p{Lu})(?!\p{Lu}\p{Ll}*\b)\p{L}+\b regex finds CaMeL words that:

  • Have at least 1 lowercase letter
  • Have at least 1 uppercase letter
  • Do not follow the X, XXX or Xxxx patterns

Author's SO profile: http://stackoverflow.com/users/3832970/wiktor-stribi%C5%BCew

Submitted by Wiktor Stribiżew
Open Workspace