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

/
/
gmD

Test String

Substitution

Processing...

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)([0-9a-z_]+\()(.*)(\);)").unwrap(); let string = "x_42951_y_20871_z_16_l_phj_tm_0_28_1_0_1_3_3_0_2018_08_31_17_00({\"data\":{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495920\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[253,219],[269,219],[269,235],[253,235],[253,219]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.942494,54.728433]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_162032352:650834\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[226,232],[242,232],[242,248],[226,248],[226,232]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.941914,54.728271]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_56986799:69042\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[252,181],[268,181],[268,197],[252,197],[252,181]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.942479,54.728907]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3749044\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[3,-14],[19,-14],[19,2],[3,2],[3,-14]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.937134,54.731335]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_127125543:2960252\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[17,39],[33,39],[33,55],[17,55],[17,39]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.93743,54.730676]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_114573906:914652\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[152,107],[168,107],[168,123],[152,123],[152,107]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.940333,54.729833]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3893830\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[227,128],[243,128],[243,144],[227,144],[227,128]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.941943,54.729564]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3784273\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[109,179],[125,179],[125,195],[109,195],[109,179]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.939411,54.728931]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495769\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[75,65],[91,65],[91,81],[75,81],[75,65]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.938676,54.730347]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495758\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-15,-11],[1,-11],[1,5],[-15,5],[-15,-11]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.936745,54.731297]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495759\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-10,22],[6,22],[6,38],[-10,38],[-10,22]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.936863,54.730887]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495771\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[117,77],[133,77],[133,93],[117,93],[117,77]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.939588,54.730198]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3786340\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[210,124],[226,124],[226,140],[210,140],[210,124]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.94157,54.729618]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3863250\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[219,17],[235,17],[235,33],[219,33],[219,17]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.941774,54.730943]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495882\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[149,129],[165,129],[165,145],[149,145],[149,129]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.940262,54.72955]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3901984\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[1,118],[17,118],[17,134],[1,134],[1,118]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.937102,54.729697]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3809142\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[56,126],[72,126],[72,142],[56,142],[56,126]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.938281,54.729597]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3749208\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[92,0],[108,0],[108,16],[92,16],[92,0]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.939054,54.731161]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3749018\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[160,193],[176,193],[176,209],[160,209],[160,193]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.940506,54.728756]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495984\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[227,205],[243,205],[243,221],[227,221],[227,205]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.941936,54.728613]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_100504911:279347\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[107,227],[123,227],[123,243],[107,243],[107,227]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.939377,54.728343]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495879\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[249,28],[265,28],[265,44],[249,44],[249,28]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.942408,54.730811]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495873\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[244,146],[260,146],[260,162],[244,162],[244,146]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.942301,54.729339]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495916\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[195,196],[211,196],[211,212],[195,212],[195,196]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.941265,54.728719]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_256910444:20878\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[107,152],[123,152],[123,168],[107,168],[107,152]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.939372,54.729272]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_256910444:20909\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[133,48],[149,48],[149,64],[133,64],[133,48]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.939926,54.730554]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_256910444:20891\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[118,108],[134,108],[134,124],[118,124],[118,108]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.939602,54.729821]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_256910444:20728\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[33,63],[49,63],[49,79],[33,79],[33,63]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.937783,54.730373]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_100504911:278356\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[127,156],[143,156],[143,172],[127,172],[127,156]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.93979,54.729221]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_256910444:20845\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[89,213],[105,213],[105,229],[89,229],[89,213]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.938979,54.728515]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_256910444:20918\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[141,19],[157,19],[157,35],[141,35],[141,19]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.940105,54.730922]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_256910444:20827\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[80,242],[96,242],[96,258],[80,258],[80,242]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.938799,54.728147]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_135873305:495906\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[187,113],[203,113],[203,129],[187,129],[187,113]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.941083,54.729749]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_407789202:3749044\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-12,-29],[34,-29],[34,17],[-12,17],[-12,-29]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.937134,54.731335]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_114573906:914652\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[137,92],[183,92],[183,138],[137,138],[137,92]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.940333,54.729833]}},{\"type\":\"Feature\",\"properties\":{\"HotspotMetaData\":{\"id\":\"img_256910444:20950\",\"provider\":\"fotki\",\"RenderedGeometry\":{\"type\":\"Polygon\",\"coordinates\":[[[142,-40],[188,-40],[188,6],[142,6],[142,-40]]]}},\"name\":\"\",\"description\":\"\"},\"geometry\":{\"type\":\"Point\",\"coordinates\":[55.940432,54.731472]}}]}});"; let substitution = "$2"; // result will be a String with the substituted value let result = regex.replace_all(string, substitution); println!("{}", result); }

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/