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

@
@
ig

Test String

Code Generator

Generated Code

import Foundation let pattern = #"[("']\s*(?<url>(?:(?:https?:|)//clone\.watchpci\.com)\/(?:(?:(?:wp-content/|wp-content/uploads/|wp-includes/)[^"',)]+))|\/[^/](?:[^"')\s>]+\.[^"')\s>]+))\s*["')]"# let regex = try! NSRegularExpression(pattern: pattern, options: .caseInsensitive) let testString = #""" <script type="text/javascript">(function (undefined) {var _targetWindow ="prefer-popup"; window.NSLPopupCenter = function (url, title, w, h) { var userAgent = navigator.userAgent, mobile = function () { return /\b(iPhone|iP[ao]d)/.test(userAgent) || /\b(iP[ao]d)/.test(userAgent) || /Android/i.test(userAgent) || /Mobile/i.test(userAgent); }, screenX = window.screenX !== undefined ? window.screenX : window.screenLeft, screenY = window.screenY !== undefined ? window.screenY : window.screenTop, outerWidth = window.outerWidth !== undefined ? window.outerWidth : document.documentElement.clientWidth, outerHeight = window.outerHeight !== undefined ? window.outerHeight : document.documentElement.clientHeight - 22, targetWidth = mobile() ? null : w, targetHeight = mobile() ? null : h, V = screenX < 0 ? window.screen.width + screenX : screenX, left = parseInt(V + (outerWidth - targetWidth) / 2, 10), right = parseInt(screenY + (outerHeight - targetHeight) / 2.5, 10), features = []; if (targetWidth !== null) { features.push('width=' + targetWidth); } if (targetHeight !== null) { features.push('height=' + targetHeight); } features.push('left=' + left); features.push('top=' + right); features.push('scrollbars=1'); var newWindow = window.open(url, title, features.join(',')); if (window.focus) { newWindow.focus(); } return newWindow; }; var isWebView = null; function checkWebView() { if (isWebView === null) { function _detectOS(ua) { switch (true) { case /Android/.test(ua): return "Android"; case /iPhone|iPad|iPod/.test(ua): return "iOS"; case /Windows/.test(ua): return "Windows"; case /Mac OS X/.test(ua): return "Mac"; case /CrOS/.test(ua): return "Chrome OS"; case /Firefox/.test(ua): return "Firefox OS"; } return ""; } function _detectBrowser(ua) { var android = /Android/.test(ua); switch (true) { case /CriOS/.test(ua): return "Chrome for iOS"; case /Edge/.test(ua): return "Edge"; case android && /Silk\//.test(ua): return "Silk"; case /Chrome/.test(ua): return "Chrome"; case /Firefox/.test(ua): return "Firefox"; case android: return "AOSP"; case /MSIE|Trident/.test(ua): return "IE"; case /Safari\//.test(ua): return "Safari"; case /AppleWebKit/.test(ua): return "WebKit"; } return ""; } function _detectBrowserVersion(ua, browser) { switch (browser) { case "Chrome for iOS": return _getVersion(ua, "CriOS/"); case "Edge": return _getVersion(ua, "Edge/"); case "Chrome": return _getVersion(ua, "Chrome/"); case "Firefox": return _getVersion(ua, "Firefox/"); case "Silk": return _getVersion(ua, "Silk/"); case "AOSP": return _getVersion(ua, "Version/"); case "IE": return /IEMobile/.test(ua) ? _getVersion(ua, "IEMobile/") : /MSIE/.test(ua) ? _getVersion(ua, "MSIE ") : _getVersion(ua, "rv:"); case "Safari": return _getVersion(ua, "Version/"); case "WebKit": return _getVersion(ua, "WebKit/"); } return "0.0.0"; } function _getVersion(ua, token) { try { return _normalizeSemverString(ua.split(token)[1].trim().split(/[^\w\.]/)[0]); } catch (o_O) { } return "0.0.0"; } function _normalizeSemverString(version) { var ary = version.split(/[\._]/); return (parseInt(ary[0], 10) || 0) + "." + (parseInt(ary[1], 10) || 0) + "." + (parseInt(ary[2], 10) || 0); } function _isWebView(ua, os, browser, version, options) { switch (os + browser) { case "iOSSafari": return false; case "iOSWebKit": return _isWebView_iOS(options); case "AndroidAOSP": return false; case "AndroidChrome": return parseFloat(version) >= 42 ? /; wv/.test(ua) : /\d{2}\.0\.0/.test(version) ? true : _isWebView_Android(options); } return false; } function _isWebView_iOS(options) { var document = (window["document"] || {}); if ("WEB_VIEW" in options) { return options["WEB_VIEW"]; } return !("fullscreenEnabled" in document || "webkitFullscreenEnabled" in document || false); } function _isWebView_Android(options) { if ("WEB_VIEW" in options) { return options["WEB_VIEW"]; } return !("requestFileSystem" in window || "webkitRequestFileSystem" in window || false); } var options = {}; var nav = window.navigator || {}; var ua = nav.userAgent || ""; var os = _detectOS(ua); var browser = _detectBrowser(ua); var browserVersion = _detectBrowserVersion(ua, browser); isWebView = _isWebView(ua, os, browser, browserVersion, options); } return isWebView; } window._nsl.push(function ($) { var targetWindow = _targetWindow || 'prefer-popup'; $('a[data-plugin="nsl"][data-action="connect"],a[data-plugin="nsl"][data-action="link"]').on('click', function (e) { var $target = $(this), href = $target.attr('href'), success = false; if (href.indexOf('?') !== -1) { href += '&'; } else { href += '?'; } var redirectTo = $target.data('redirect'); if (redirectTo === 'current') { href += 'redirect=' + encodeURIComponent(window.location.href) + '&'; } else if (redirectTo && redirectTo !== '') { href += 'redirect=' + encodeURIComponent(redirectTo) + '&'; } if (targetWindow !== 'prefer-same-window' && checkWebView()) { targetWindow = 'prefer-same-window'; } if (targetWindow === 'prefer-popup') { if (NSLPopupCenter(href + 'display=popup', 'nsl-social-connect', $target.data('popupwidth'), $target.data('popupheight'))) { success = true; e.preventDefault(); } } else if (targetWindow === 'prefer-new-tab') { var newTab = window.open(href + 'display=popup', '_blank'); if (newTab) { if (window.focus) { newTab.focus(); } success = true; e.preventDefault(); } } if (!success) { window.location = href; e.preventDefault(); } }); var googleLoginButton = $('a[data-plugin="nsl"][data-provider="google"]'); if (googleLoginButton.length && checkWebView()) { googleLoginButton.remove(); } });})();</script> """# 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