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 single character of: a, b, c or d
    [[ab][cd]]
  • 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]
  • Character class intersection
    [\w&&[^\d]]
  • 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

"
"
g

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#"{"id":"auth_payer_8gtx3241241UH0Y29zP7D931"}"#).unwrap(); let string = "\"\\r\\n```\\n[\\r\\n {\\r\\n \\\"tactic\\\": \\\"targeting\\\",\\r\\n \\\"targeting\\\": \\\"s=1167891 OR s=455871 OR s=455878 OR s=455872 OR s=455873 OR s=455874 OR s=455875 OR s=455876 OR s=455877 OR s=2077 OR s=110598 OR s=261857 OR s=4647 OR s=2042 OR s=2039 OR s=691 OR s=1398 OR s=447247 OR s=428051 OR s=446928 OR s=447359 OR s=225461 OR s=225618 OR s=447527 OR s=447486 OR s=446609 OR s=446767 OR s=447170 OR s=1442 OR s=1421 OR s=3894 OR s=261852 OR s=262377 OR s=633295 OR s=633274 OR s=633286 OR s=633288 OR s=633273 OR s=743155 OR s=743167 OR s=743207 OR s=743149 OR s=743162 OR s=739645\\\"\\r\\n }\\r\\n]\""; // 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/