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

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)^(.*->)( *(-)?\d*(\.)?\d*: ('\d{1,}\'))*$").unwrap(); let string = "2022-01-11 09:52:35.65 -> TimingLog -> 1: '69' -2: '434' -3: '434' -4: '434' -5: '509' -6: '509' -6.1: '509' -7: '588' -19: '588' -20: '588' -21: '5145' -22: '5202' -23: '5224' -24: '5233' -25: '5233' 2022-01-11 09:52:48.82 -> TimingLog -> 1: '47' -2: '213' -3: '213' -4: '213' -5: '269' -6: '269' -6.1: '269' -7: '298' -8: '298' -12: '380' -13: '380' -14: '6270' -15: '6328' -16: '6347' -17: '6356' -18: '6356' 2022-01-11 09:53:02.68 -> TimingLog -> 1: '23' -2: '54' -3: '54' -4: '54' -5: '65' -6: '65' -6.1: '65' -7: '76' -19: '76' -20: '76' -21: '4916' -22: '4982' -23: '5010' -24: '5015' -25: '5015' 2022-01-11 09:53:06.57 -> HandleArticleWarningOnOrder -> -1: '160' -2: '223' -1: '223' -2: '285' -1: '285' -2: '671' -1: '671' -2: '816' -1: '816' -2: '970' -1: '970' -2: '1122' -3: '1122' -4: '1312' -5: '17766' -6: '17766' 2022-01-11 09:53:17.01 -> TimingLog -> 1: '140' -2: '527' -3: '527' -4: '527' -5: '671' -6: '671' -6.1: '671' -7: '737' -19: '737' -20: '737' -21: '5984' -22: '6163' -23: '6307' -24: '6339' -25: '6339' 2022-01-11 09:53:25.12 -> TimingLog -> 1: '25' -2: '85' -3: '85' -4: '85' -5: '108' -6: '108' -6.1: '108' -7: '117' -19: '117' -20: '117' -21: '7706' -22: '7880' -23: '8018' -24: '8110' -25: '8110' 2022-01-11 09:53:31.90 -> TimingLog -> 1: '51' -2: '210' -3: '210' -4: '210' -5: '269' -6: '269' -6.1: '269' -7: '324' -19: '324' -20: '324' -21: '6641' -22: '6675' -23: '6704' -24: '6711' -25: '6711' 2022-01-11 09:53:44.04 -> TimingLog -> 1: '27' -2: '121' -3: '121' -4: '121' -5: '202' -6: '202' -6.1: '202' -7: '215' -19: '215' -20: '215' -21: '6520' -22: '6566' -23: '6594' -24: '6604' -25: '6604' 2022-01-11 09:53:53.51 -> TimingLog -> 1: '72' -2: '275' -3: '275' -4: '275' -5: '302' -6: '302' -6.1: '302' -7: '327' -8: '327' -12: '413' -13: '413' -14: '7408' -15: '7571' -16: '7725' -17: '7731' -18: '7731' 2022-01-11 09:54:04.27 -> TimingLog -> 1: '22' -2: '72' -3: '72' -4: '72' -5: '86' -6: '86' -6.1: '86' -7: '105' -8: '105' -12: '147' -13: '147' -14: '5192' -15: '5223' -16: '5251' -17: '5269' -18: '5269' 2022-01-11 09:54:09.16 -> HandleArticleWarningOnOrder -> -1: '91' -2: '188' -2.1: '188' -3: '188' -4: '351' -5: '18276' -6: '18276' 2022-01-11 09:54:12.80 -> TimingLog -> 1: '13' -2: '43' -3: '43' -4: '43' -5: '51' -6: '51' -6.1: '51' -7: '57' -8: '57' -12: '86' -13: '86' -14: '8024' -15: '8263' -16: '8430' -17: '8524' -18: '8524' 2022-01-11 09:54:21.30 -> TimingLog -> 1: '105' -2: '353' -3: '353' -4: '353' -5: '414' -6: '414' -6.1: '414' -7: '470' -8: '470' -12: '814' -13: '814' -14: '8172' -15: '8336' -16: '8449' -17: '8480' -18: '8480' 2022-01-11 09:54:34.02 -> HandleArticleWarningOnOrder -> -1: '102' -2: '154' -2.1: '154' -3: '154' -4: '202' -5: '20106' -6: '20106' ..."; let substitution = "$1$5"; // 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/