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

/
/
ig

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = #"[NMS]\w+\-\w*BASE\w*\.AD\.DTI"# let regex = try! NSRegularExpression(pattern: pattern, options: .caseInsensitive) let testString = #""" MAVM-WLBASE1a.ad.dti. MAVM-WLBASE2a.ad.dti. MAVM-WLBASE3a.ad.dti. MAVM-WLBASE4a.ad.dti. MAVM-WLBASE5a.ad.dti. NJ-BASEQA2015.ad.dti. NJVM-BASEQA2014.ad.dti. NJVM-WLBASE6b.ad.dti. NJVM-WLBASE7a.ad.dti. NY2-BASEQA.ad.dti. NY2-DW5BASEQA01.ad.dti. SHVM-WLBASE1A.ad.dti. NJ-ODEV2015.ad.dti. NJ-ODEV2015b.ad.dti. NJVM-ODEV2014.ad.dti. NY2-ODEV2017.ad.dti. SH-ODEV2017.ad.dti. MOVM-WL12C.ad.dti. NJ-PASWL12c01.ad.dti. NJ-WL12cSVT01.ad.dti. NJVM-WL12CUST1.ad.dti. NJVM-wl12cust2.ad.dti. njvm-wl12cust4.ad.dti. njvm-wl12x64j7a.ad.dti. NY2-WL12asp01.ad.dti. NY2-WL12ASP02.ad.dti. NY2-WL12ASP03.ad.dti. NY2-WL12ASP04.ad.dti. SH-AutoITWL12.ad.dti. SH-PASWL12c02.ad.dti. SHVM-WL12-RE.ad.dti. SHVM-WL12CUST3.ad.dti. ASP-WL1213INT01.asp.ad.dti. ASP-WL12CEXT5.asp.ad.dti. ASPVM-WL12c10.asp.ad.dti. ASPVM-WL12c8.asp.ad.dti. ASPVM-WL12c9.asp.ad.dti. LT-MPROEKT.ad.dti. LT-jpo01.ad.dti LT-jpo01.adXdti """# 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