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

Code Generator

Language

Generated Code

import Foundation let pattern = #"NewProcessName.*?Teams\.exe<\/Data>.*?ParentProcessName"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #""" <Event xmlns='http:// schemas .microsoft .com/win/2004/08/events/event '><System><Provider Name='Microsoft-Windows-Security-Auditing' Guid='{54849625-5478-4994-a5ba-3e3b0328c30d}'/><EventID>4688</EventID><Version>2</Version><Level>0</Level><Task>13312</Task><Opcode>0</Opcode><Keywords>0x8020000000000000</Keywords><TimeCreated SystemTime='2024-02-21T22:11:25.7542758Z'/><EventRecordID>4096881</EventRecordID><Correlation/><Execution ProcessID='4' ThreadID='1124'/><Channel>Security</Channel><Computer>{Device_FQDN}</Computer><Security/></System><EventData><Data Name='SubjectUserSid'>S-1-1-11-111111111-111111111-1111111111-111111</Data><Data Name='SubjectUserName'>{user}</Data><Data Name='SubjectDomainName'>{Domain}</Data><Data Name='SubjectLogonId'>0x11111111</Data><Data Name='NewProcessId'>0x5864</Data><Data Name='NewProcessName'>C:\Users\{user}\AppData\Local\Microsoft\Teams\current\Teams.exe</Data><Data Name='TokenElevationType'>%%1936</Data><Data Name='ProcessId'>0x4604</Data><Data Name='CommandLine'></Data><Data Name='TargetUserSid'>S-1-0-0</Data><Data Name='TargetUserName'>-</Data><Data Name='TargetDomainName'>-</Data><Data Name='TargetLogonId'>0x0</Data><Data Name='ParentProcessName'>C:\Users\{user}\AppData\Local\Microsoft\Teams\current\Teams.exe</Data><Data Name='MandatoryLabel'>S-1-11-1111</Data></EventData></Event> <Event xmlns='http:// schemas .microsoft .com/win/2004/08/events/event '><System><Provider Name='Microsoft-Windows-Security-Auditing' Guid='{54849625-5478-4994-a5ba-3e3b0328c30d}'/><EventID>4688</EventID><Version>2</Version><Level>0</Level><Task>13312</Task><Opcode>0</Opcode><Keywords>0x8020000000000000</Keywords><TimeCreated SystemTime='2024-02-21T22:33:19.5932251Z'/><EventRecordID>4212468</EventRecordID><Correlation/><Execution ProcessID='4' ThreadID='31196'/><Channel>Security</Channel><Computer>{Device_FQNDN</Computer><Security/></System><EventData><Data Name='SubjectUserSid'>S-1-1-11-111111111-111111111-1111111111-111111</Data><Data Name='SubjectUserName'>{user}</Data><Data Name='SubjectDomainName'>{Domain}</Data><Data Name='SubjectLogonId'>0x1111111</Data><Data Name='NewProcessId'>0x7664</Data><Data Name='NewProcessName'>C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe</Data><Data Name='TokenElevationType'>%%1936</Data><Data Name='ProcessId'>0x4238</Data><Data Name='CommandLine'></Data><Data Name='TargetUserSid'>S-1-0-0</Data><Data Name='TargetUserName'>-</Data><Data Name='TargetDomainName'>-</Data><Data Name='TargetLogonId'>0x0</Data><Data Name='ParentProcessName'>C:\Users\{user}\AppData\Local\Microsoft\Teams\current\Teams.exe</Data><Data Name='MandatoryLabel'>S-1-11-1111</Data></EventData></Event> """# 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