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

/
/
g

Test String

Code Generator

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"<script.*src.*edge.*<\/script>").unwrap(); let string = "<!DOCTYPE html> <html> <head> <meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/> <meta http-equiv=\"X-UA-Compatible\" content=\"IE=Edge\"/> <title>Untitled</title> <!--Adobe Edge Runtime--> <meta http-equiv=\"X-UA-Compatible\" content=\"IE=Edge\"> <script src=\"//ad.adverticum.net/scripts/goa-helper.js\"></script> <script type=\"text/javascript\" charset=\"utf-8\" src=\"http://animate.adobe.com/runtime/5.0.0/edge.5.0.0.min.js\"></script> <style> .edgeLoad-EDGE-20744748 { visibility:hidden; } </style> <script> AdobeEdge.loadComposition('MM_Gyor_Huawei_1112-1114_HTML5_720x250', 'EDGE-20744748', { scaleToFit: \"none\", centerStage: \"both\", minW: \"0\", maxW: \"undefined\", width: \"720px\", height: \"250px\" }, {\"dom\":{}}, {\"dom\":{}}); </script> <!--Adobe Edge Runtime End--> </head> <body style=\"margin:0;padding:0;\"> <div id=\"Stage\" class=\"EDGE-20744748\"></div> </body> </html>"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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/