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 = #"^t=(.* .*) p=(\d+) h=(.*) db=(\w+) u=(\w+) x=(\d+) (\w+:) (.*)"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #""" t=2020-08-25 15:00:00.000 +03 p=16205 h=127.0.0.1 db=test u=test_app x=0 LOG: duration: 0.011 ms execute S_40: SELECT ID, EKLEME_ZAMANI, EKLEYEN_KULLANICI_ID, GORULME_DURUMU, GUNCELLEME_ZAMANI, GUNCELLEYEN_KULLANICI_ID, IP_ADRESI, ISLEM_ZAMANI, ISLEMI_YAPAN_KULLANICI_ID, METOD, PARAMETRE_JSON, UYGULAMA_ID, VERSIYON, DURUM_ID FROM DB_LOG WHERE (ID = $1) t=2020-08-25 15:00:00.000 +03 p=16205 h=127.0.0.1 db=test u=test_app x=0 DETAIL: parameters: $1 = '9187372' t=2020-08-25 15:00:00.001 +03 p=36001 h=127.0.0.1 db=test u=test_app x=0 LOG: duration: 0.005 ms bind S_1: COMMIT t=2020-08-25 15:00:00.001 +03 p=36001 h=127.0.0.1 db=test u=test_app x=0 LOG: duration: 0.004 ms execute S_1: COMMIT t=2020-08-25 15:00:00.001 +03 p=16205 h=127.0.0.1 db=test u=test_app x=0 LOG: duration: 0.018 ms bind S_41: INSERT INTO DB_LOG (ID, EKLEME_ZAMANI, EKLEYEN_KULLANICI_ID, GORULME_DURUMU, GUNCELLEME_ZAMANI, GUNCELLEYEN_KULLANICI_ID, IP_ADRESI, ISLEM_ZAMANI, ISLEMI_YAPAN_KULLANICI_ID, METOD, PARAMETRE_JSON, UYGULAMA_ID, VERSIYON, DURUM_ID) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14) t=2019-12-19 17:00:00.102 +03 p=58042 h= db= u= x=0 LOG: automatic vacuum of table "postgres.pgagent.pga_job": index scans: 0 pages: 0 removed, 9 remain, 0 skipped due to pins, 0 skipped frozen tuples: 0 removed, 493 remain, 472 are dead but not yet removable, oldest xmin: 20569983 buffer usage: 90 hits, 0 misses, 0 dirtied avg read rate: 0.000 MB/s, avg write rate: 0.000 MB/s system usage: CPU: user: 0.00 s, system: 0.00 s, elapsed: 0.00 s """# let stringRange = NSRange(location: 0, length: testString.utf16.count) let substitutionString = #""\1","\2","\3","\4","\5","\6","\7","\8""# 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