regex
Regular Expressions
Regex syntax, patterns, recipes, and cross-language reference.
Core Syntax
Character Classes
. Any character (except newline, unless s/dotall flag)
\d \D Digit [0-9] / Non-digit
\w \W Word char [a-zA-Z0-9_] / Non-word
\s \S Whitespace [ \t\n\r\f\v] / Non-whitespace
[abc] Character set (a, b, or c)
[^abc] Negated set (not a, b, or c)
[a-z] Range (a through z)
[a-zA-Z] Multiple ranges
\p{L} Unicode letter (PCRE/Java/JS with u flag/Rust)
\p{N} Unicode number
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