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

/
/
g

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = #"({((\\?\".*?\\?\")*?)})"# let regex = try! NSRegularExpression(pattern: pattern) let testString = #"{\"active_ad_id\":\"789915\",\"publisher_id\":\"728\",\"publisher_data1\":\"225_192_99_bf56c9012a1d810f2ab52\",\"placement_id\":\"212_WDfTkctyUHoYbXDU\",\"device_os\":\"android\",\"device_os_version\":\"5.1\",\"ip\":\"78.26.216.249\",\"request\":\"/tracking?offer_id=789915\\u0026publisher_id=728\\u0026placement_id=212_WDfTkctyUHoYbXDU\\u0026publisher_data1=225_192_99_bf56c9012a1d810f2ab52\\u0026ios_ifa=\\u0026google_aid=\",\"agent\":\"Mozilla%2F5.0+%28Linux%3B+Android+5.1%3B+m2+Build%2FLMY47D%29+AppleWebKit%2F537.36+%28KHTML%2C+like+Gecko%29+Version%2F4.0+Chrome%2F40.0.2214.124+Mobile+Safari%2F537.36\",\"host\":\"tracking.cph-media.com\",\"country\":\"ua\",\"state\":\"51\",\"city\":\"odesa\",\"network_id\":7,\"tracking_id\":\"007C1531432355PyAgF1NWwW9fMhSgNrn9TA\",\"source_id\":471,\"clicked_at\":\"2018-07-12 21:52:35.989354\",\"created_at\":\"2018-07-12 21:52:36.002024\",\"updated_at\":\"2018-07-12 21:52:36.002054\",\"unix_clicked_at\":1531432355,\"unix_clicked_at_date\":1531353600,\"unix_clicked_at_hour\":1531429200,\"unix_clicked_at_minute\":1531432320,\"ip_gdpr\":\"78.26.216.248\"}{\"active_ad_id\":\"1350798\",\"publisher_id\":\"804\",\"publisher_data1\":\"18071223_08_292289_a5d2f506c041e\",\"placement_id\":\"a292289s92520128_7086\",\"device_os\":\"android\",\"device_os_version\":\"6.0\",\"ip\":\"182.232.100.114\",\"request\":\"/tracking?offer_id=1350798\\u0026publisher_id=804\\u0026placement_id=a292289s92520128_7086\\u0026publisher_data1=18071223_08_292289_a5d2f506c041e\\u0026affe=fl\",\"agent\":\"Mozilla%2F5.0+%28Linux%3B+Android+6.0%3B+BLL-L22+Build%2FHUAWEIBLL-L22%3B+wv%29+AppleWebKit%2F537.36+%28KHTML%2C+like+Gecko%29+Version%2F4.0+Chrome%2F66.0.3359.158+Mobile+Safari%2F537.36\",\"host\":\"tracking.stroeermp.com\",\"country\":\"th\",\"state\":\"10\",\"city\":\"bangkok\",\"network_id\":6,\"tracking_id\":\"006C1531432356dR4xiu2gcRDY4V7NfRVJhg\",\"source_id\":623,\"clicked_at\":\"2018-07-12 21:52:36.002165\",\"created_at\":\"2018-07-12 21:52:36.010711\",\"updated_at\":\"2018-07-12 21:52:36.014774\",\"unix_clicked_at\":1531432356,\"unix_clicked_at_date\":1531353600,\"unix_clicked_at_hour\":1531429200,\"unix_clicked_at_minute\":1531432320,\"ip_gdpr\":\"182.232.100.112\"}"# let stringRange = NSRange(location: 0, length: testString.utf16.count) let matches = regex.matches(in: testString, range: stringRange) var result: [[String]] = [] for match in matches { var groups: [String] = [] for rangeIndex in 1 ..< match.numberOfRanges { let nsRange = match.range(at: rangeIndex) guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue } let string = (testString as NSString).substring(with: nsRange) groups.append(string) } if !groups.isEmpty { result.append(groups) } } 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