Assistai DEV Tools

Pattern

//gm

Test String

JavaScript

//m
// Use with .match() or .matchAll() for global

Python

import re

pattern = re.compile(r'' | re.MULTILINE)
result = re.findall(pattern, text)

import "regexp"

re := regexp.MustCompile(`(?m)`)
result := re.FindAllString(text, -1)

PHP

$$pattern = '//m';
$$result = preg_match_all($$pattern, $$text, $$matches);

Rust

use regex::Regex;

let re = Regex::new(r"(?m)").unwrap();
let result = re.find_iter(text);

Character Classes

.Any char except newline

\dDigit (0–9)

\DNon-digit

\wWord (a-z, A-Z, 0-9, _)

\WNon-word

\sWhitespace

\SNon-whitespace

Quantifiers

*0 or more

+1 or more

?0 or 1

{n}Exactly n

{n,}n or more

{n,m}Between n and m

Anchors & Groups

^Start of string

$End of string

\bWord boundary

( )Capturing group

(?: )Non-capturing group

|Alternation (OR)

Lookaround

(?= )Positive lookahead

(?! )Negative lookahead

[abc]Character class

[^abc]Negated class

[a-z]Range