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

/
/
ism

Test String

Code Generator

Generated Code

import Foundation let pattern = #"Date:\n(.*)\n\nNumber"# let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive, .dotMatchesLineSeparators]) let testString = #""" Voice Mail Message: Double click on the attachment to play the voice mail file. Date: 12/01/2014 01:28:36 PM Number: 800-123-4567, JOHN SMITH CallerID: 123-456-7890, JANE DOE Destination: Voice Mail File Duration: 00:00:37 ====================== Name : Jane Doe Address : 123 Fake Street , Miami , Florida Phone : 123-456-7890 Ye, my name is Jane Doe. I own the property at 123 Fake Street , Miami , Florida. You sent me a couple of postcards. Let me know if you're interested in making an offer. it's a single family home.3 bedrooms, 2 baths. Has a single efficiency in the back, that's an additional rental income. Again, Jane Doe and that's 123 Fake Street and my phone number is 123-456-7890. Thanks ! """# let stringRange = NSRange(location: 0, length: testString.utf16.count) if let firstMatch = regex.firstMatch(in: testString, range: stringRange) { let result: [String] = (1 ..< firstMatch.numberOfRanges).map { (testString as NSString).substring(with: firstMatch.range(at: $0)) } print(result) } else { print("No matches were found.") }

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