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)\bnew\s+Array\s*[(]\s*(".*?)(?=[)]\s*,\s*new\s+Array|\s*[)]\s*[)]\s*[^(]+$)"#).unwrap(); let string = " mmSuggestDeliver(0, new Array(\"Name\", \"Category\", \"Keywords\", \"Bias\", \"Extension\", \"IDs\"), new Array(new Array(\"HSBC Holdings plc (Spons. ADRs)\", \"Stocks\", \"HSBC|US4042804066|HSBC||\", \"75\", \"\", \"hsbc|HSBC|1|4917\"),new Array(\"HSBC Holdings plc\", \"Stocks\", \"|GB0005405286|||HSBA\", \"75\", \"\", \"hsbc-gb0005405286||1|1046\"),new Array(\"HSBC Trinkaus & Burkhardt AG\", \"Stocks\", \"|DE0008115106|||TUBG\", \"75\", \"\", \"hsbc_trinkausburkhardt||1|3774\"),new Array(\"HSBC Bank Malta Plc Registered Shs\", \"Stocks\", \"|MT0000030107|||\", \"75\", \"\", \"hsbc_bank_malta||1|16831644\"),new Array(\"HSBC-D7 SA de CV SIID (A)\", \"Stocks\", \"|MX51HS0Q00E8|||\", \"75\", \"\", \"hsbc-d7||1|5125971\"),new Array(\"HSBC US Buy-Out GmbH & Co. KGaA\", \"Stocks\", \"|DE000A0MM6H7|||\", \"75\", \"\", \"hsbc_us_buy-out_gmbhco||1|23145\"),new Array(\"HSBC Holdings PLC ADR Cert Deposito Arg Repr 0.5 ADRs\", \"Stocks\", \"|ARDEUT112257|||\", \"75\", \"\", \"hsbc_2||1|1399269\"),new Array(\"HSBC Holdings PLC6.2 % Pfd Shs Sponsored American Deposit Repr 1/40th 6.2 % PfdShs Ser -A-\", \"Stocks\", \"HSBC.PA|US4042806046|HSBC.PA||\", \"75\", \"\", \"hsbc-pa|HSBC.PA|1|19327\"),new Array(\"HSBC Holdings PLC 8 % Perp Sub Cap Secs 2010-Without Fixed Maturity Series -2-\", \"Stocks\", \"HSEB|US4042808026|HSEB||\", \"75\", \"\", \"hseb|HSEB|1|5083319\"),new Array(\"HSBC Holdings PLC 8 1-8 % Perpetual Sub Cap Secs 2008-Exch into Non-Cum Dollar Pref Shs\", \"Stocks\", \"HSEA|US4042807036|HSEA||\", \"75\", \"\", \"hsea|HSEA|1|3782270\")), 10, 0);"; // 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/