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

const regex = /(.*Device:\s*(.*?)\s*Serial Number.*)|(.*Gerät:\s*(.*?)\s*Seriennummer.*)|(.*ICD-Model:\s*(.*?)\s*Serial Number:.*)|(.*ICD-Modell:\s*(.*?)\s*Seriennummer.*)|(.*Pacemaker Model:\s*(.*?)\s*Serial Number.*)|(.*Schrittmachermodell:\s*(.*?)\s*Seriennummer:.*)/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('(.*Device:\\s*(.*?)\\s*Serial Number.*)|(.*Gerät:\\s*(.*?)\\s*Seriennummer.*)|(.*ICD-Model:\\s*(.*?)\\s*Serial Number:.*)|(.*ICD-Modell:\\s*(.*?)\\s*Seriennummer.*)|(.*Pacemaker Model:\\s*(.*?)\\s*Serial Number.*)|(.*Schrittmachermodell:\\s*(.*?)\\s*Seriennummer:.*)', 'gm') const str = `Device:REVEAL LINQ LNQ11 Serial Number:RLA087267G Date of Visit:03-Jul-2019 08:10:51 Gerät:Viva Quad XT CRT-D DTBA2QQ Seriennummer:BLG613658S Untersuchungsdatum:27-Apr-2018 12:34:06 ICD-Modell: Marquis VR 7230 Seriennummer: PKD616419S Untersuchungsdatum:12, Mai 2015 ICD-Model: Marquis VR 7230 Serial Number: PKD616419S Untersuchungsdatum:12, Mai 2015 Pacemaker Model: Medtronic Adapta ADSR01 Serial Number: NWM851790 Date of Visit: 12/08/17 Schrittmachermodell: Medtronic Adapta ADVDD01 Seriennummer: NWG618042 Nachsorgedatum: 05.12.1`; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions