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 = #"^.*TELEPHONE NUMBER(.*)DATE ACCOUNT OPENED(.*)LANG CODE(.*)CHAIN CODE(.*)TRANSIT ROUTING NUM(.*)DATE OF LAST REVIEW(.*)DATE OF NEXT REVIEW(.*)ALT TRANSIT ROUTING NUM(.*)AVERAGE FLOAT DAYS(.*)SPECIAL CONTROL FLAGS(.*)SEASONAL MERCHANT(.*)STATEMENT HOLD CODE(.*)SEND ACQUIRER(.*)STATEMENT MAIL FLAG(.*)MONTHLY ACH FLAG(.*)MERCHANT NAME(.*)MERCHANT TYPE(.*)DDA NUMBER(.*)ALT DDA NUMBER(.*)AUTH INC GRID(.*)AUTH EXP GRID(.*)CROSS REFERENCE NO.(.*)ETC NON FDR FLAG(.*)ETC VENDOR ID(.*)SALES RESPONSIBILITY(.*)USER DEF INC GRID(.*)USER DEF EXP GRID(.*)TAXPAYER ID(.*)ACCOUNT1 FEE FLAG(.*)ACCOUNT1 START(.*)STOP(.*)MRCH ADV FLAG(.*)ACCOUNT2 FEE FLAG(.*)ACCOUNT2 START(.*)STOP(.*)TERMINAL START(.*)STOP(.*)ACCOUNT3 FEE FLAG(.*)ACCOUNT3 START(.*)STOP(.*)SPARK EXCLUSION CD(.*)ACCOUNT4 FEE FLAG(.*)ACCOUNT4 START(.*)STOP(.*)PAYEE FLAG CD(.*)ACCOUNT5 FEE FLAG(.*)ACCOUNT5 START(.*)STOP(.*)EIDS IND(.*)RECURRING FEE FLAG(.*)RECURRING FEE IND(.*)BUW INDICATOR(.*)TURF CD(.*)TURF EFF DT(.*)TAX EFF YEAR(.*)BANKCARD DBA(.*)TIMS ACCT ID(.*) RETAIL DBA(.*)CUST BUSINESS ID(.*)CUST BUS RELATIONSHIP CD(.*)DEPOSIT TYPE(.*)ETC ACCOUNT TYPE(.*)DEVICE TYPE(.*)EXCLUDE ADJ FLAG(.*)MC\/V POS(.*)DISCOUNT CALCULATION(.*)ROUND DISCOUNT(.*)REBATE DISTRIBUTE(.*)REBATE OPTION(.*)REBATE PERIOD(.*)"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #""" 0 TELEPHONE NUMBER 612-874-8702 DATE ACCOUNT OPENED 01/27/14 LANG CODE - EN CHAIN CODE TRANSIT ROUTING NUM 96001013 DATE OF LAST REVIEW 00/00 DATE OF NEXT REVIEW 01/15 ALT TRANSIT ROUTING NUM AVERAGE FLOAT DAYS 00-00 SPECIAL CONTROL FLAGS SEASONAL MERCHANT NO STATEMENT HOLD CODE Y - SEND ACQUIRER STATEMENT MAIL FLAG M - MERCH ADDRESS MONTHLY ACH FLAG 1 - MERCHANT NAME MERCHANT TYPE REGULAR DDA NUMBER 12000069001 ALT DDA NUMBER AUTH INC GRID P801 AUTH EXP GRID 000 CROSS REFERENCE NO. 0000326 ETC NON FDR FLAG N ETC VENDOR ID SALES RESPONSIBILITY 0001 USER DEF INC GRID 000 USER DEF EXP GRID 000 TAXPAYER ID 30-0016022 ACCOUNT1 FEE FLAG 3 ACCOUNT1 START 00/00 STOP 00/00 MRCH ADV FLAG 0 ACCOUNT2 FEE FLAG 1 ACCOUNT2 START 00/00 STOP 00/00 TERMINAL START 00/00 STOP 00/00 ACCOUNT3 FEE FLAG 1 ACCOUNT3 START 00/00 STOP 05/17 SPARK EXCLUSION CD N ACCOUNT4 FEE FLAG 0 ACCOUNT4 START 00/00 STOP 00/00 PAYEE FLAG CD S ACCOUNT5 FEE FLAG 1 ACCOUNT5 START 00/00 STOP 00/00 EIDS IND N RECURRING FEE FLAG RECURRING FEE IND BUW INDICATOR TURF CD A TURF EFF DT 00/00/0000 TAX EFF YEAR 0000 BANKCARD DBA - ACADIA CAFE /MINNEAPOLIS /MN TIMS ACCT ID O0529808390100022000 RETAIL DBA - ACADIA CAFE MINNEAPOLIS MN CUST BUSINESS ID CUST BUS RELATIONSHIP CD - - - - - - - - - - - - - - - - - - - - - - - - - - - - MERCHANT OPTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - DEPOSIT TYPE 3 - ETC ETC ACCOUNT TYPE 7 - RESERVED DEVICE TYPE NONE EXCLUDE ADJ FLAG Y - EXCL ADJ/CB MC/V POS 0922 DISCOUNT CALCULATION - 2 ROUND DISCOUNT - N REBATE DISTRIBUTE REBATE OPTION N - NO REBATE REBATE PERIOD """# 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