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

/
/
gm

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#"(?m)<td data-table-header="The bank [^"]+">([\d|,|.\+]+)<\/td>"#).unwrap(); let string = "<div class='index-currency-table'> <!--http://1000hz.github.io/bootstrap-validator/#validator-usage--> <div class=\"row\"> <div class=\"col-xs-12\"> <table class=\"table--exchange table--exchange--responsive\"> <thead> <tr> <th scope=\"col\">Currency</th> <th scope=\"col\">Nominal</th> <th scope=\"col\">The bank buys</th> <th scope=\"col\">The bank sells</th> <th scope=\"col\">BNB</th> </tr> </thead> <tbody> <tr> <td data-table-header=\"Currency\"> <a href=\"/en/rates-indexes/currency-rates/USD/\" target=\"_self\" title=\"United States Dollar\"> <span class=\"flag-icon flag-icon-us\"></span> USD </a> </td> <td data-table-header=\"Nominal\">1</td> <td data-table-header=\"The bank buys\">1.581200</td> <td data-table-header=\"The bank sells\">1.646100</td> <td data-table-header=\"BNB\">1.614390</td> </tr> </tbody> </table> </div> <!--col--> </div> <!--row--> </div>"; // 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/