Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/

Test String

Code Generator

Language

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?s)<div>.*?<\/div>").unwrap(); let string = "<div class=\"scrollable \" style=\"height: 200px;\"> <div> <p>CO-Schrank: nicht ben&ouml;tigtes ausbauen</p> <p><strong>________________________________________________________________________</strong></p> <p><strong>==&gt;&nbsp; wird nicht mehr ben&ouml;tigt!<br /></strong>z-B.: IUC</p> <p>CO-Management in Gen. 2 implementieren</p> <ol> <li>Ausbau der PCI-Karten aus ZKA-PC in CO-PC- PC-Sys 02 TP 55, 56, 61 sind noch Profibus im ZKA-PC ==&gt; in CO-PC- PC-Sys 02 greift dann auf CO-PC f&uuml;r Datenaufzeichnung =&gt; Betrieb wieder aufnehmen</li> <li>Ausbau der IUC</li> <li>Testaufbau am CO-PC f&uuml;r den CO-Algorithmus und Datenspeicherung</li> <li>Gen. 2 in CO-Management implementieren- pro Pr&uuml;fling 3 Min. (3 Min. x 48 HG x 10 Messungen)&nbsp;= 1440 Min. = 24 h- Messzeit 1-2 Min.</li> </ol> </div></div>"; // result will be a tuple containing the start and end indices for the first match in the string let result = regex.captures(string); let (start, end) = match result { Some((s, e)) => (s, e), None => { // ... } }; println!("{}", &string[start, end]); }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/