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

/
/
ig

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#"(?i)(?:.*?:(".*?"))|(.*)"#).unwrap(); let string = "{\"maps\":{\"idOthers\":{\"label\":\"Others\",\"state\":1,\"bkmrk\":{}}},\"portals\":{\"id1472374017624\":{\"label\":\"Teslin, YT\",\"state\":1,\"bkmrk\":{\"id1471384290640\":{\"guid\":\"1c742997732a404190ad947a1e2ad1f1.12\",\"latlng\":\"60.176809,-132.790461\",\"label\":\"Teslin Heritage Centre, Yt - j\"},\"id1471384292759\":{\"guid\":\"0ff8105df28b4291bb388bb3169992b0.16\",\"latlng\":\"60.167183,-132.707912\",\"label\":\"Moose And Caribou Replica\"},\"id1471384291685\":{\"guid\":\"80e38740843f43489e5c3b9bcb4017e6.16\",\"latlng\":\"60.16109,-132.693209\",\"label\":\"Village of Teslin Gazebo\"},\"id1471384293782\":{\"guid\":\"71e8bd86f50c4fd9844f3d4091b92325.16\",\"latlng\":\"60.167443,-132.707359\",\"label\":\"Wildlife Gallery\"}}},\"id1472374213379\":{\"label\":\"Watson Lake, YT\",\"state\":1,\"bkmrk\":{\"id1472374223764\":{\"guid\":\"32b7435123914d6d8c470f1c9c3d03b2.16\",\"latlng\":\"60.066292,-128.704744\",\"label\":\"Wye Lake Gazebo\"},\"id1472374224152\":{\"guid\":\"52f7f7cbac894342a5e83a97a46c7422.16\",\"latlng\":\"60.065734,-128.705368\",\"label\":\"Wye Lake Park\"},\"id1472374224529\":{\"guid\":\"04b586b6c30c42ce84bdb7f85d9f2d16.16\",\"latlng\":\"60.065442,-128.704187\",\"label\":\"Horned & Common Dandelions\"},\"id1472374225092\":{\"guid\":\"f657a17af2dc48c6966aa32a83f2b1f9.16\",\"latlng\":\"60.062886,-128.7068\",\"label\":\"First Wye Lake Park\"},\"id1472374225511\":{\"guid\":\"33498408d348447d9cde3fdb180dc038.16\",\"latlng\":\"60.064183,-128.714208\",\"label\":\"Watson Lake Information Center\"},\"id1472374225978\":{\"guid\":\"da5df8fb86d44476b4372ba0295ae2af.12\",\"latlng\":\"60.063748,-128.715488\",\"label\":\"Watson Lake Sign Post Forest -\"},\"id1472374226806\":{\"guid\":\"33f693fa6735446a8d848300487b46f0.16\",\"latlng\":\"60.065042,-128.713877\",\"label\":\"Watson Lake Recreation Centre\"},\"id1472374227184\":{\"guid\":\"e968d06b86264aae882b41038e6c19c1.16\",\"latlng\":\"60.06444,-128.715315\",\"label\":\"Robert Campbell Highway Information\"},\"id1472374223273\":{\"guid\":\"84d9bc723f7c4d7e98a7a62ec86f7a68.16\",\"latlng\":\"60.062733,-128.704699\",\"label\":\"Watson Lake Library\"}}},\"idOthers\":{\"label\":\"Others\",\"state\":1,\"bkmrk\":{\"id1472374171311\":{\"guid\":\"445808e24dd840d5b24b407edd8f664b.16\",\"latlng\":\"60.027705,-129.080566\",\"label\":\"Native Outlook\"},\"id1472374176673\":{\"guid\":\"184a20a3b1694bf68c89354680d7b674.16\",\"latlng\":\"60.027904,-129.080963\",\"label\":\"Nugget Totem\"}}}}} "; let substitution = "$1"; // 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/