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)RJ.currentMP3Url = \'([\w\\\/-]+)'").unwrap(); let string = " </div> </div> </div> </div> </section> <script> RJ.currentMP3Url = 'mp3/Arian-Band-To-Ke-Ba-Man-Baashi'; RJ.currentMP3 = '40008'; RJ.currentMP3Type = 'mp3'; RJ.playingIndex = '0'; RJ.currentMP3Perm = 'Arian-Band-To-Ke-Ba-Man-Baashi'; RJ.currentAlbum = null; RJ.currentPlaylist = null; RJ.relatedMP3 = [{\"next\":\"Arian-Band-To-Ke-Ba-Man-Baashi\",\"index\":0},{\"next\":\"Arian-Band-Bargard\",\"index\":1},{\"next\":\"Arian-Band-Bishtar\",\"index\":2},{\"next\":\"Arian-Band-Deltangiha\",\"index\":3},{\"next\":\"Arian-Band-Faseleh\",\"index\":4},{\"next\":\"Arian-Band-Delam-Barat-Tang-Shodeh\",\"index\":5},{\"next\":\"Arian-Band-To-Moondi-o-Man\",\"index\":6},{\"next\":\"Arian-Band-Nemidoonam\",\"index\":7},{\"next\":\"Arian-Band-Baade-To\",\"index\":8},{\"next\":\"Arian-Band-Too-Cheshaye-Man-Negah-Kon\",\"index\":9},{\"next\":\"Arian-Band-Ta-Abaad\",\"index\":10},{\"next\":\"Arian-Band-Gole-Man\",\"index\":11},{\"next\":\"Arian-Band-Parvaz\",\"index\":12},{\"next\":\"Arian-Band-Gole-Aftab-Gardoon\",\"index\":13},{\"next\":\"Arian-Band-Parvaz-(Club-Mix)\",\"index\":14},{\"next\":\"Arian-Band-Ghasedak\",\"index\":15},{\"next\":\"Arian-Band-Baroon\",\"index\":16},{\"next\":\"Arian-Band-Panjereh\",\"index\":17},{\"next\":\"Arian-Band-Setareh\",\"index\":18},{\"next\":\"Arian-Band-Ey-Javidan-Iran\",\"index\":19},{\"next\":\"Arian-Band-Tab\",\"index\":20},{\"next\":\"Arian-Band-Gole-Hamishe-Bahar\",\"index\":21},{\"next\":\"Arian-Band-Afsoongar\",\"index\":22},{\"next\":\"Arian-Band-Iran\",\"index\":23},{\"next\":\"Arian-Band-The-Words-I-Love-You-(Feat-Chris-de-Burgh)\",\"index\":24},{\"next\":\"Arian-Band-Bi-To-Ba-To\",\"index\":25},{\"next\":\"Arian-Band-Aroom-Aroom\",\"index\":26},{\"next\":\"Arian-Band-Lahzeh-ha\",\"index\":27},{\"next\":\"Arian-Band-Bahooneh\",\"index\":28},{\"next\":\"Arian-Band-Na-Mehraboon\",\"index\":29},{\"next\":\"Arian-Band-Farda-Male-Mast\",\"index\":30}]; RJ.nextMp3Base = '/mp3s/mp3/'; RJ.nextMp3AlbumBase = '/mp3s/album/'; RJ.playerVolume = 75; setupMP3Ping(); </script> "; // 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/