Regular Expressions 101

Save & Share

  • Regex Version: ver. 5
  • 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

/
/
gm

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = #"^(.*?)(?:\'s.*)?(?:\s*(?:Original|Extended|Club|Vocal|Dub|DJ|Tech|Summer of Love|12\"))*\s+(?:Remix|Rework|Remake|Reboot|Mix|Bootleg|Version|Edit)$"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #""" Original Mix Vocal Club Mix Vocal Mix Arbe & Dann Rework Protoculture Remix Extended Mix Club Mix Above & Beyond Extended Club Mix Above & Beyond Mix Daniel Kandi Extended Mix Myon Extended Summer of Love Reboot Above & Beyond Club Mix Mike Shiver's Catching Sun Mix Millennial's On Full Force Extended Remix DJ Tiesto's Magikal Remake Dustin Husain Bootleg Extended Version Daniel Kandi Mix Above & Beyond Club Mix Cosmic Gate Vocal Mix Armin van Buuren Remix Above & Beyond Extended Club Mix Maor Levi Extended Mix gardenstate Extended Mix RYDEX Remix Extended Mix Stratos Kokotas Extended Mix Niko Zografos Extended Remix Simon Bostock Remix Extended Mix Extended Mix Original Mix Cold Blue Extended Remix Extended Mix Original Mix Original Mix Extended Mix Extended Mix Judah Remix Extended Mix Extended Mix Original Mix Hybrid's Supersonic Remix Original Mix Extended Mix Activa Extended Rework DJ Version Extended Version Original Mix Extended Tech Mix Original Mix Original Mix Extended Mix Talla 2XLC Extended Remix Extended Mix Extended Mix Extended Mix Extended Mix Extended Mix Extended Mix Audien Remix Extended Mix Original Mix Original Mix """# 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