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)\\"(title|url)\\": \\"[^"]*\\""#).unwrap(); let string = "1. Есть строки в текстовом файле: \"title\": \"разный текст\" Найти всё в этом файле. 2. Есть строки в текстовом файле: \"url\": \"разный текст\" Найти всё в этом файле. 3. Есть всё в общей строке в текстовом файле: \"title\": \"разный текст\", \"url\": \"разный текст\" [{\"hostName\": \"youtube\", \"name\": \"Rock & Roll 50's Mix\", \"type\": \"VIDEO\", \"iconimage\": \"https://i.ytimg.com/vi/gLzn8nDVSo8/hq720.jpg?sqp=-...\", \"resolver\": \"youtube\", \"data\": \"{\\\"category\\\": \\\"video\\\", \\\"name\\\": \\\"category\\\", \\\"title\\\": \\\"Rock & Roll 50's Mix\\\", \\\"url\\\": \\\"http://www.youtube.com/watch?v=gLzn8nDVSo8\\\", \\\"time\\\": \\\"9 \\\\u043b\\\\u0435\\\\u0442 \\\\u043d\\\\u0430\\\\u0437\\\\u0430\\\\u0434\\\", \\\"desc\\\": \\\"Duration: 11:38 | 71\\\\u00a0528\\\\u00a0835 \\\\u043f\\\\u0440\\\\u043e\\\\u0441\\\\u043c\\\\u043e\\\\u0442\\\\u0440\\\\u043e\\\\u0432 | 9 \\\\u043b\\\\u0435\\\\u0442 \\\\u043d\\\\u0430\\\\u0437\\\\u0430\\\\u0434\\\\ndjdirtybeat\\\\nPLEASE LIKE MY FACEBOOK PAGE, Download Here https://soundcloud.com/mauricio-villegas-12\\\\u00a0...\\\", \\\"type\\\": \\\"video\\\", \\\"icon\\\": \\\"https://i.ytimg.com/vi/gLzn8nDVSo8/hq720.jpg?sqp=-...\"}\", \"description\": \"Duration: 11:38 | 71\\u00a0528\\u00a0835 \\u043f\\u0440\\u043e\\u0441\\u043c\\u043e\\u0442\\u0440\\u043e\\u0432 | 9 \\u043b\\u0435\\u0442 \\u043d\\u0430\\u0437\\u0430\\u0434\\ndjdirtybeat\\nPLEASE LIKE MY FACEBOOK PAGE, Download Here https://soundcloud.com/mauricio-villegas-12\\u00a0...\"}, {\"hostName\": \"youtube\", \"name\": \"Free - All Right Now\", \"type\": \"VIDEO\", \"iconimage\": \"https://i.ytimg.com/vi/YExuLkIaQ7U/hq720.jpg?sqp=-...\", \"resolver\": \"youtube\", \"data\": \"{\\\"category\\\": \\\"video\\\", \\\"name\\\": \\\"category\\\", \\\"title\\\": \\\"Free - All Right Now\\\", \\\"url\\\": \\\"http://www.youtube.com/watch?v=YExuLkIaQ7U\\\", \\\"time\\\": \\\"11"; // 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/