Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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

/
/
g

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = #".+AES:.+?:.+?!.+?,.+?,.+?,.+?,.+?,\d+"# let regex = try! NSRegularExpression(pattern: pattern) let testString = ##""" 00:16:0808-11-20AES:AE022AGES:022.60032S!20FINI/ID60032S,BLUE01,ZPR008A21308/MR1,2/AFLPLA,KPSM/TD071030,10325053 01:30:0808-11-20AES:AE20C7GES:442.77186A!H1G-#MDINI/ID77186A,RCH356,AAM18131E306/MR0,0/AFLPLA,KPSM/TD070705,113038C4 19:37:0708-11-20AES:AE1472GES:822.77180A!H1N-#MDINI/ID77180A,RCH871,AJRF3368F313/MR1,0/AFFJDG,OAIX/TD081130,1059997B 20:49:0908-11-20AES:AE123AGES:822.44128A!H1P-#MDINI/ID44128A,RCH836,AJZA3362C312/MR0,0/AFFJDG,OKAS/TD081245,1245C15B 04:16:0508-11-20AES:AE0580GES:D02.70035B!33F/AMCTACC.INI01081215INITIALIZERCH551MC0035ABR02Y5XD313KDOVLERT081400/ 22:33:0708-11-20AES:AE10BFGES:822.10196A!H1D-#MDINI/ID10196A,RCH873,JJRF3361F312/MR0,0/AFRODN,FJDG/TD071355,135525BA 22:47:0908-11-20AES:AE117EGES:822.21112A!H1C-#MDINI/ID21112A,RCH877,JJZA3363C312/MR0,0/AFFJDG,OKAS/TD081345,1345F5F3 07:32:0808-11-20AES:AE0243GES:022.80047S!20G01/Y/MC/0047/08/KIAB/KSVN/1701/0000/SNAP85//6A9E """## 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