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

/
/
mg

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)(?:[a-z0-9!#$%&'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+\/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])"#).unwrap(); let string = "{\"_id\":{\"$oid\":\"572a5b82ae5174d3c4177d6b\"},\"email\":\"dj292023@gmail.com\",\"gender\":\"F\",\"zip\":\"29203\",\"state\":\"SC\",\"city\":\"Columbia\",\"address1\":\"5137 LINDELLA ST\",\"last_name\":\"Jones\",\"first_name\":\"Debra\",\"updatedAt\":{\"$date\":\"2016-09-28T12:17:21.610Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:37.860Z\"},\"job\":\"Cashier\"} {\"_id\":{\"$oid\":\"572a5b82ae5174d3c4177d6c\"},\"email\":\"killaswag2345@gmail.com\",\"updatedAt\":{\"$date\":\"2016-05-04T20:28:38.123Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:38.123Z\"}} {\"_id\":{\"$oid\":\"572a5b83ae5174d3c4177d6d\"},\"email\":\"crandall656@gmail.com\",\"gender\":\"M\",\"last_name\":\"Crandall\",\"first_name\":\"Andrew\",\"updatedAt\":{\"$date\":\"2016-09-20T02:28:58.710Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:39.175Z\"},\"zip\":\"37738\",\"state\":\"TN\",\"city\":\"Gatlinburg\",\"address1\":\"1048 LANCEWOOD DR\"} {\"_id\":{\"$oid\":\"572a5b85ae5174d3c4177d6e\"},\"email\":\"bre7117@gmail.com\",\"gender\":\"F\",\"zip\":\"75962\",\"state\":\"TX\",\"city\":\"NACOGDOCHES\",\"address1\":\"19942 CRESTED HILL\",\"last_name\":\"HEARD\",\"first_name\":\"BRIANA\",\"updatedAt\":{\"$date\":\"2016-08-30T11:02:57.810Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:40.650Z\"},\"job\":\"membership sales associate\"} {\"_id\":{\"$oid\":\"572a5b85ae5174d3c4177d6f\"},\"email\":\"35ellie@gmail.com\",\"zip\":\"83402\",\"state\":\"ID\",\"city\":\"EAGLE ROCK\",\"address1\":\"416N 3900E\",\"last_name\":\"STAUFFER\",\"first_name\":\"ELLIZABETH\",\"updatedAt\":{\"$date\":\"2016-05-04T20:28:41.218Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:41.218Z\"}} {\"_id\":{\"$oid\":\"572a5b7992338558326a9355\"},\"updatedAt\":{\"$date\":\"2016-05-30T13:44:05.943Z\"},\"createdAt\":{\"$date\":\"2016-05-04T20:28:41.745Z\"},\"email\":\"silshadow@yahoo.com\",\"ip\":\"76.2.67.68\",\"first_name\":\"Del\",\"last_name\":\"Soltis\",\"address1\":\"\",\"city\":\"\",\"state\":\"\",\"zip\":\"44417\",\"phone\":\"\",\"dob\":\"\",\"inAccountName\":\"IA_EDU1\",\"__v\":0} {\"_id\":{\"$oid\":\"572a5b86ae5174d3c4177d70\"},\"email\":\"travistalbert645@yahoo.com\",\"gender\":\"M\",\"zip\":\"20001\",\"state\":\"DC\",\"city\":\"WASHINGTON\",\"address1\":\"1703 2ND ST NW\",\"last_name\":\"TALBERT\",\"first_name\":\"TRAVIS\",\"updatedAt\":{\"$date\":\"2016-09-21T14:56:31.811Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:42.103Z\"},\"job\":\"Inventory Stocker\"} {\"_id\":{\"$oid\":\"572a5b7a92338558326a9358\"},\"updatedAt\":{\"$date\":\"2016-05-04T20:28:42.508Z\"},\"createdAt\":{\"$date\":\"2016-05-04T20:28:42.508Z\"},\"email\":\"mark_88_11@yahoo.com\",\"ip\":\"174.124.192.43\",\"first_name\":\"Mark\",\"last_name\":\"Jenkins\",\"address1\":\"\",\"city\":\"\",\"state\":\"\",\"zip\":\"\",\"phone\":\"\",\"dob\":\"\",\"inAccountName\":\"IA_EDU1\",\"__v\":0} {\"_id\":{\"$oid\":\"572a5b7b741c393b3257df25\"},\"updatedAt\":{\"$date\":\"2016-05-04T20:28:43.109Z\"},\"createdAt\":{\"$date\":\"2016-05-04T20:28:43.109Z\"},\"first_name\":\"Oliver\",\"last_name\":\"Dawanda\",\"zip\":\"28012\",\"email\":\"dawanda28@yahoo.com\",\"ip\":\"127.0.0.1\",\"inAccountName\":\"MPM_EDU2\",\"gender\":\"M\",\"__v\":0} {\"_id\":{\"$oid\":\"572a5b88ae5174d3c4177d71\"},\"email\":\"greene015@gmail.com\",\"gender\":\"M\",\"zip\":\"33102\",\"state\":\"FL\",\"city\":\"MIAMI\",\"address1\":\"995 MASON TURNER RD\",\"last_name\":\"GREENE\",\"first_name\":\"JOHNATHAN\",\"updatedAt\":{\"$date\":\"2016-05-11T08:30:22.287Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:43.620Z\"},\"job\":\"Warehouse\"} {\"_id\":{\"$oid\":\"572a5b88ae5174d3c4177d72\"},\"email\":\"kadance30@gmail.com\",\"gender\":\"M\",\"zip\":\"27536\",\"state\":\"NC\",\"city\":\"HENDERSON\",\"address1\":\"357 SOUTHALL ST\",\"last_name\":\"MARROW\",\"first_name\":\"QUENTIN\",\"updatedAt\":{\"$date\":\"2016-05-04T20:32:29.702Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:44.404Z\"}} {\"_id\":{\"$oid\":\"572a5b89ae5174d3c4177d73\"},\"email\":\"kanalou76@gmail.com\",\"zip\":\"37217\",\"state\":\"TN\",\"city\":\"Nashville-Davidson metropolitan gove\",\"address1\":\"491 millwood dr\",\"last_name\":\"kane\",\"first_name\":\"alassane\",\"updatedAt\":{\"$date\":\"2016-06-18T06:47:00.719Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:44.790Z\"}} {\"_id\":{\"$oid\":\"572a5b89ae5174d3c4177d74\"},\"email\":\"gereperez1040@gmail.com\",\"zip\":\"78574\",\"state\":\"TX\",\"city\":\"Mission\",\"address1\":\"6001 Elise Dr.\",\"last_name\":\"Perez\",\"first_name\":\"Geremias\",\"updatedAt\":{\"$date\":\"2016-08-11T20:32:52.988Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:45.033Z\"},\"job\":\"Sales\",\"dob\":\"10-17-1996\",\"gender\":\"M\",\"phone\":\"9566413280\"} {\"_id\":{\"$oid\":\"572a5b89ae5174d3c4177d75\"},\"email\":\"cayman64@hotmail.com\",\"gender\":\"M\",\"zip\":\"29323\",\"state\":\"SC\",\"city\":\"CHESNEE\",\"last_name\":\"ROBINSON\",\"first_name\":\"DEBBIE\",\"updatedAt\":{\"$date\":\"2016-07-13T01:03:34.129Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:45.189Z\"},\"address1\":\"1058 BUCK CREEK RD\",\"job\":\"Marketing\",\"dob\":\"5/25/1951\",\"phone\":\"8644617766\"} {\"_id\":{\"$oid\":\"572a5b89ae5174d3c4177d76\"},\"email\":\"shataviasadler@gmail.com\",\"zip\":\"77084\",\"state\":\"TX\",\"city\":\"HOUSTON\",\"address1\":\"1227 HELMS RD\",\"last_name\":\"SADLER\",\"first_name\":\"SHATAVIA\",\"updatedAt\":{\"$date\":\"2016-05-23T20:13:19.725Z\"},\"__v\":0,\"createdAt\":{\"$date\":\"2016-05-04T20:28:45.227Z\"}} {\"_id\":{\"$oid\":\"572a5b7dac39fe75320e5f83\"},\"updatedAt\":{\"$date\":\"2016-06-18T18:54:49.336Z\"},\"createdAt\":{\"$date\":\"2016-05-04T20:28:45.299Z\"},\"email\":\"hwatso@aol.com\",\"ip\":\"65.15.99.190\",\"first_name\":\"Joyce\",\"last_name\":\"Watson\",\"city\":\"TERRY\",\"state\":\"MS\",\"zip\":\"39170\",\"inAccountName\":\"R3I_FYDN\",\"gender\":\"F\",\"__v\":0} {\"_id\":{\"$oid\":\"572a5b7d741c393b3257df2c\"},\"updatedAt\":{\"$date\":\"2016-05-04T20:28:45.496Z\"},\"createdAt\":{\"$date\":\"2016-05-04T20:28:45.496Z\"},\"email\":\"staciechess@yahoo.com\",\"ip\":\"107.77.106.92\",\"first_name\":\"Stacie\",\"last_name\":\"CHESS\",\"city\":\"Meadville\",\"state\":\"PA\",\"zip\":\"16335\",\"inAccountName\":\"R3I_FYDN\",\"gender\":\"F\",\"__v\":0} {\"_id\":{\"$oid\":\"572a5b7d92338558326a9361\"},\"updatedAt\":{\"$date\":\"2016-05-27T12:34:51.274Z\"},\"createdAt\":{\"$date\":\"2016-05-04T20:28:45.700Z\"},\"email\":\"robert.siler@att.net\",\"ip\":\"108.89.195.49\",\"first_name\":\"Robert\",\"last_name\":\"Siler\",\"city\":\"Cypress\",\"state\":\"CA\",\"zip\":\"90630\",\"inAccountName\":\"R3I_FYDN\",\"gender\":\"M\",\"__v\":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/