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

import Foundation let pattern = #"^(drv:\d+)(?:[\s\S]+?(?:Name|Serial|Port):.*$){3}\n\h*(\[[^\]]+?])"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #""" HDClone 6 Enterprise Edition Serial: 1111111111 Miray Software AG Gaissacher Str. 18 81371 Munich Germany Detecting drives. drv:0 Name: WDC WD40EZRZ-00WN9B0 (4,000,754 MB) Serial: WD-WCC4E0ESU7YK Port: 0/1/1/0 [ -, M:, X: ] To specify this drive, use the following parameters: -srcdrv:/-dstdrv:0 -srcdrvn:/-dstdrvn:"WDC WD40EZRZ-00WN9B0" -srcdrvn:/-dstdrvn:"WDC WD40EZRZ-00WN9B0WD-WCC4E0ESU7YK" -srvdrvp:/-dstdrvp:0/1/1/0 drv:1 Name: ST2000DM001-1CH164 (2,000,399 MB) Serial: S1E1GA0V Port: 0/1/1/1 [ S:, T: ] To specify this drive, use the following parameters: -srcdrv:/-dstdrv:1 -srcdrvn:/-dstdrvn:ST2000DM001-1CH164 -srcdrvn:/-dstdrvn:ST2000DM001-1CH164S1E1GA0V -srvdrvp:/-dstdrvp:0/1/1/1 drv:2 Name: ST2000DM001-1CH164 (2,000,399 MB) Serial: S1E1GC0Z Port: 0/0/0/1 [ B:, P: ] To specify this drive, use the following parameters: -srcdrv:/-dstdrv:2 -srcdrvn:/-dstdrvn:ST2000DM001-1CH164 -srcdrvn:/-dstdrvn:ST2000DM001-1CH164S1E1GC0Z -srvdrvp:/-dstdrvp:0/0/0/1 drv:3 Name: WDC WD10EADS-11M2B2 (1,000,205 MB) Serial: WD-WCAV5D430071 Port: 0/0/2/0 [ -, V: ] To specify this drive, use the following parameters: -srcdrv:/-dstdrv:3 -srcdrvn:/-dstdrvn:"WDC WD10EADS-11M2B2" -srcdrvn:/-dstdrvn:"WDC WD10EADS-11M2B2WD-WCAV5D430071" -srvdrvp:/-dstdrvp:0/0/2/0 drv:4 Name: KINGSTON SMS200S360G (60,023 MB) Serial: 50026B72440A6EE7 Port: 0/1/3/0 [ C: ] To specify this drive, use the following parameters: -srcdrv:/-dstdrv:4 -srcdrvn:/-dstdrvn:"KINGSTON SMS200S360G" -srcdrvn:/-dstdrvn:"KINGSTON SMS200S360G50026B72440A6EE7" -srvdrvp:/-dstdrvp:0/1/3/0 """# let stringRange = NSRange(location: 0, length: testString.utf16.count) let substitutionString = #""# let result = regex.stringByReplacingMatches(in: testString, range: stringRange, withTemplate: substitutionString) print(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 Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression