Regular Expressions 101

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Function

  • Match
  • Substitution
  • List
  • Unit Tests (4)
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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
Processing...

Test String

Code Generator

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?<=\bimport)(\s*(?:[a-z0-9A-Z]+(\s)+)*)((([a-zA-Z0-9]+\.)+)[a-zA-Z0-9]*\*?);" Local $sString = "/*" & @CRLF & _ "* Copyright 2009 Brian Pellin." & @CRLF & _ "*" & @CRLF & _ "* This file is part of KeePassDroid." & @CRLF & _ "*" & @CRLF & _ "* KeePassDroid is free software: you can redistribute it and/or modify" & @CRLF & _ "* it under the terms of the GNU General Public License as published by" & @CRLF & _ "* the Free Software Foundation, either version 2 of the License, or" & @CRLF & _ "* (at your option) any later version." & @CRLF & _ "*" & @CRLF & _ "* KeePassDroid is distributed in the hope that it will be useful," & @CRLF & _ "* but WITHOUT ANY WARRANTY; without even the implied warranty of" & @CRLF & _ "* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the" & @CRLF & _ "* GNU General Public License for more details." & @CRLF & _ "*" & @CRLF & _ "* You should have received a copy of the GNU General Public License" & @CRLF & _ "* along with KeePassDroid. If not, see <http://www.gnu.org/licenses/>." & @CRLF & _ "*" & @CRLF & _ "*/" & @CRLF & _ "package com.keepassdroid.tests.crypto;" & @CRLF & _ "" & @CRLF & _ "import " & @CRLF & _ "static " & @CRLF & _ "test " & @CRLF & _ "test2 " & @CRLF & _ "org.junit.Assert.assertArrayEquals.*;" & @CRLF & _ "" & @CRLF & _ "import " & @CRLF & _ "java.io.IOException;" & @CRLF & _ "import java.util.Random;" & @CRLF & _ "" & @CRLF & _ "import junit.framework.TestCase;" & @CRLF & _ "" & @CRLF & _ "import com.keepassdroid.crypto.finalkey.AndroidFinalKey;" & @CRLF & _ "import com.keepassdroid.crypto.finalkey.NativeFinalKey;" & @CRLF & _ "" & @CRLF & _ "public class FinalKeyTest extends TestCase {" & @CRLF & _ " private Random mRand;" & @CRLF & _ " " & @CRLF & _ " @Override" & @CRLF & _ " protected void setUp() throws Exception {" & @CRLF & _ " super.setUp();" & @CRLF & _ " " & @CRLF & _ " mRand = new Random();" & @CRLF & _ " }" & @CRLF & _ " " & @CRLF & _ " public void testNativeAndroid() throws IOException {" & @CRLF & _ " // Test both an old and an even number to test my flip variable" & @CRLF & _ " testNativeFinalKey(5);" & @CRLF & _ " testNativeFinalKey(6);" & @CRLF & _ " }" & @CRLF & _ " " & @CRLF & _ " private void testNativeFinalKey(int rounds) throws IOException {" & @CRLF & _ " byte[] seed = new byte[32];" & @CRLF & _ " byte[] key = new byte[32];" & @CRLF & _ " byte[] nativeKey;" & @CRLF & _ " byte[] androidKey;" & @CRLF & _ " " & @CRLF & _ " mRand.nextBytes(seed);" & @CRLF & _ " mRand.nextBytes(key);" & @CRLF & _ " " & @CRLF & _ " AndroidFinalKey aKey = new AndroidFinalKey();" & @CRLF & _ " androidKey = aKey.transformMasterKey(seed, key, rounds);" & @CRLF & _ " " & @CRLF & _ " NativeFinalKey nKey = new NativeFinalKey();" & @CRLF & _ " nativeKey = nKey.transformMasterKey(seed, key, rounds);" & @CRLF & _ " " & @CRLF & _ " assertArrayEquals("Does not match", androidKey, nativeKey);" & @CRLF & _ " " & @CRLF & _ " }" & @CRLF & _ "}" & @CRLF & _ "" Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH) Local $aFullArray[0] For $i = 0 To UBound($aArray) -1 _ArrayConcatenate($aFullArray, $aArray[$i]) Next $aArray = $aFullArray ; Present the entire match result _ArrayDisplay($aArray, "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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm