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

/
/
gmi

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

import Foundation let pattern = #"(?<=CN\=).*?(?=,)"# let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive]) let testString = #""" Computer Location = afp.local/EANG Description = RED_TXT Device Name = EANG04W Domain Name = afp.local Full Name = Admintech Hardware Monitoring Type = ASIC2 Last Blocked Application Scan Date = 1420558125 Last Custom Definition Scan Date = 1348087114 Last Hardware Scan Date = 1420533869 Last Policy Sync Date = 1420533623 Last Software Scan Date = 1420533924 Last Update Scan Date = 1420558125 Last Vulnerability Scan Date = 1420558125 LDAP Location = **CN=EANG04W**,OU=EANG,DC=afp,DC=local Login Name = ADMINTECH Main Board OEM Name = Dell Inc. Number of Files = 384091 Primary Owner = **CN= LOUHICHI anoir**,OU=EANG,DC=afp,DC=localenter code here """# let stringRange = NSRange(location: 0, length: testString.utf16.count) let substitutionString = #"Company"# 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