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

/
/
gixsmu

Test String

Code Generator

Language

Generated Code

const regex = /# Start defining (?(DEFINE) (?<XSEP>\s*[xх\*\-\s]?\s*) (?<MARGIN>(?:\.\d)?) (?<RADIUS>r?[12]\d(?&MARGIN)) (?<J>(?:1[01]|[4-9])(?&MARGIN)j?) (?<DIAM> \b (?: (?&RADIUS)(?:\s*\/\s*(?&J))? | (?&J)(?&XSEP)(?&RADIUS) ) \b ) (?<PCD>\b(?:[pb]cd\s*)?[34568](?&XSEP)(?:98|[12]\d{2})(?&MARGIN)\b) (?<ET>(?:(?:et|ет)\s*)?\-?\d+(?&MARGIN)\b) (?<CB>\b(?:(?:цо|cb|d(?:ia)?)\s*)?\d{2,3}(?&MARGIN)\b) ) # End defining (?: (?<diam>(?&DIAM)) | (?<pcd>(?&PCD)) | (?<et>(?&ET)) | (?<cb>(?&CB)) )/gismu; // Alternative syntax using RegExp constructor // const regex = new RegExp('# Start defining (?(DEFINE) (?<XSEP>\\s*[xх\\*\\-\\s]?\\s*) (?<MARGIN>(?:\\.\\d)?) (?<RADIUS>r?[12]\\d(?&MARGIN)) (?<J>(?:1[01]|[4-9])(?&MARGIN)j?) (?<DIAM> \\b (?: (?&RADIUS)(?:\\s*\\\/\\s*(?&J))? | (?&J)(?&XSEP)(?&RADIUS) ) \\b ) (?<PCD>\\b(?:[pb]cd\\s*)?[34568](?&XSEP)(?:98|[12]\\d{2})(?&MARGIN)\\b) (?<ET>(?:(?:et|ет)\\s*)?\\-?\\d+(?&MARGIN)\\b) (?<CB>\\b(?:(?:цо|cb|d(?:ia)?)\\s*)?\\d{2,3}(?&MARGIN)\\b) ) # End defining (?: (?<diam>(?&DIAM)) | (?<pcd>(?&PCD)) | (?<et>(?&ET)) | (?<cb>(?&CB)) )', 'gismu') const str = `r22 pcd 4x108 ET 45.5 ЦО 58.5 15 /5.0j 6*108 et45 ЦО 58.5 15/ 5.0j 4x108 -45.5 58.5 pcd 4x138 15/5.0j ET58.5 ЦО45 ЦО45.5 ET58.5 19 pcd 4x 108 r15/5.6j pcd 5х112 ET60 CB66 et50 r15/5 5х112 ET60 d66 r15/5 pcd 5*112 ET60 dia 66 5.6j x 15.5 pcd 5 х 112 ет -60 CB66 5x15.5 5х112.5 ET60 CB66 250/50 r16`; // 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