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 = #"\S.\w+"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #""" 3 behnnam 12 157 282 55 308 159 4 qmohu 12 035 048 112 050 92 5 yufi71 4 637 190 66 488 366 6 Rohirrim_16 3 026 111 88 140 500 7 Nelliell 2 408 324 37 561 322 8 Knighteer 2 225 014 111 877 445 9 -suvari- 2 200 538 96 095 498 10 farukcakir 1 896 439 47 117 173 11 bobo342 1 767 789 133 470 479 12 Nawaf2u 1 701 184 11 020 171 13 korkuteke 1 646 584 18 821 376 14 aslkrslan 1 213 415 3 451 204 15 cinek31 1 157 463 7 912 230 16 61pusat61 1 152 810 17 215 104 17 sladdin 1 031 630 19 556 312 18 devilsblade 908 424 37 133 375 19 krzychu4321 869 630 45 454 475 20 lacivertly1 868 405 30 795 457 21 orklar-tr 635 614 9 142 449 22 Doganbey1993 623 343 9 409 62 23 eagle_37800 592 185 25 424 389 24 cavidov 570 925 37 045 79 25 mbardakci 541 223 9 903 169 26 karasahin55tr 538 393 19 545 291 27 salvatordemon 517 475 2 248 127 28 secooooooo 401 102 12 641 236 29 synfrkn 360 119 14 243 375 30 gingso 218 393 5 373 355 """# 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