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

/
/
gi

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#"(?i)src[ *= *]['"](.*\.js[^'"]*)"#).unwrap(); let string = "<!DOCTYPE html> <html xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"es\"><head><script src=\"https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.uk.8Wsso_8ylQo.O/m=auth/exm=plus,plusone/rt=j/sv=1/d=1/ed=1/am=AQ/rs=AItRSTNfGdKjky6Lry6QDOZ198k58lZp_A/cb=gapi.loaded_2\" async=\"\"></script><script src=\"https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.uk.8Wsso_8ylQo.O/m=plus/exm=plusone/rt=j/sv=1/d=1/ed=1/am=AQ/rs=AItRSTNfGdKjky6Lry6QDOZ198k58lZp_A/cb=gapi.loaded_1\" async=\"\"></script> <meta content=\"text/html; charset=utf-8\" http-equiv=\"content-type\" /> <title>¡Venta de año nuevo en MacPaw! Consigue CleanMyMac con 50% de descuento.</title> <meta content=\"Oferta de Año Nuevo: CleanMyMac 2 con 50% de descuento\" property=\"og:title\" /> <meta content=\"http://macpaw.com/images/products/CleanMyMac_small.png\" property=\"og:image\" /> <meta content=\"Hagamos del 2014 &quot;El año de la Mac limpia&quot;. Compre CleanMyMac con 50% de descuento ahora. Oferta válida hasta el 2 de Enero del 2014.\" property=\"og:description\" /> <meta content=\"http://macpaw.com/holiday13_es\" property=\"og:url\" /> <meta content=\"CleanMyMac es una solución todo en uno para limpiar de una manera segura tu Mac. ¡Ahora con 50% de descuento!\" name=\"description\" /> <meta content=\"width=device-width\" name=\"viewport\" /> <script src=\"http://dnn506yrbagrg.cloudfront.net/pages/scripts/0011/1236.js?388910\" async=\"\" type=\"text/javascript\"></script><script async=\"\" src=\"//connect.facebook.net/en_US/fp.js\"></script><script type=\"text/javascript\" async=\"\" src=\"http://mc.yandex.ru/metrika/watch.js\"></script><script src=\"http://edge.quantserve.com/quant.js\" async=\"\" type=\"text/javascript\"></script><script type=\"text/javascript\" async=\"\" src=\"http://stats.g.doubleclick.net/dc.js\"></script><script id=\"twitter-wjs\" src=\"http://platform.twitter.com/widgets.js\"></script><script type=\"text/javascript\" async=\"\" src=\"https://apis.google.com/js/platform.js\" gapi_processed=\"true\"></script><script id=\"facebook-jssdk\" src=\"//connect.facebook.net/es_ES/all.js#xfbml=1\"></script><script src=\"https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.uk.8Wsso_8ylQo.O/m=plusone/rt=j/sv=1/d=1/ed=1/am=AQ/rs=AItRSTNfGdKjky6Lry6QDOZ198k58lZp_A/cb=gapi.loaded_0\" async=\"\"></script><script src=\"http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js\"></script> <script src=\"/js/jstracker/jstracker.js\" type=\"text/javascript\"></script> <script src=\"/js/landings/land176/script.js\" type=\"text/javascript\"></script> <link type=\"image/x-icon\" href=\"/images/favicon.png\" rel=\"icon\" /> <link media=\"screen\" type=\"text/css\" href=\"/css/landings/land176/style_es.css\" rel=\"stylesheet\" /> <link type=\"text/css\" rel=\"stylesheet\" href=\"http://fonts.googleapis.com/css?family=Open+Sans:400,300,600,700&amp;subset=latin,cyrillic\" /> <!-- <link href='http://fonts.googleapis.com/css?family=Lobster' rel='stylesheet' type='text/css'> --> <!-- Start Visual Website Optimizer Asynchronous Code --> <script type=\"text/javascript\"> var _vwo_code=(function(){ var account_id=31766, settings_tolerance=2000, library_tolerance=2500, use_existing_jquery=false, // DO NOT EDIT BELOW THIS LINE f=false,d=document;return{use_existing_jquery:function(){return use_existing_jquery;},library_tolerance:function(){return library_tolerance;},finish:function(){if(!f){f=true;var a=d.getElementById('_vis_opt_path_hides');if(a)a.parentNode.removeChild(a);}},finished:function(){return f;},load:function(a){var 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arial, sans-serif !important;font-size:13px !important;font-style:normal !important;font-variant:normal !important;font-weight:normal !important;letter-spacing:normal !important;line-height:1 !important;text-decoration:none !important;text-indent:0 !important;text-shadow:none !important;text-transform:none !important;white-space:normal !important;word-spacing:normal !important}.fb_connect_bar a:hover{color:#fff}.fb_connect_bar .fb_profile img{height:30px;width:30px;vertical-align:middle;margin:0 6px 5px 0}.fb_connect_bar div a,.fb_connect_bar span,.fb_connect_bar span a{color:#bac6da;font-size:11px;text-decoration:none}.fb_connect_bar .fb_buttons{float:right;margin-top:7px} .fbpluginrecommendationsbarleft,.fbpluginrecommendationsbarright{position:fixed !important;bottom:0;z-index:999}.fbpluginrecommendationsbarleft{left:10px}.fbpluginrecommendationsbarright{right:10px}</style><script async=\"true\" type=\"text/javascript\" src=\"http://a.adroll.com/j/roundtrip.js\"></script><script 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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/