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

/
/
g

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 = "(?<=[:=!?&,;|{\[\(\n])[\x09\x20]*(?:\/(?![*+?])(?:(?:[^\n\[\\\/]*+(?:\\\\)*+(?:\\\[|\\\/|\\(?!\[))?(\[)?)+(?(1)([^\n\]\\]*+(\\\\)*+(\\\]|\\(?!\]))?)*((?<!\\)\])?))*[^\n]*?(?<![^\\]\/)(?<![^\\]\\)\/)[gim]{0,3}[\x09\x20]*+(?![^}\]\),;:.\n])" Local $sString = "// Regular expressions " & @CRLF & _ " r = /([\\/])?([^\\/]*)$/; " & @CRLF & _ " r = /([\\/])?([^\\:/]*)$/; // коммент " & @CRLF & _ " /abc\[def\[^\s[\]/]ghi/g.test(s);// здесь одна пара квадратных скобок! " & @CRLF & _ "r = /\//i; " & @CRLF & _ " r = /[/\*]/img; // коммент " & @CRLF & _ " r = /[a-z]{5}/; " & @CRLF & _ " r = /[a-z]{1,5}/; " & @CRLF & _ " r = /([a-z])+/; " & @CRLF & _ " r = /([a-z]{1,5})+/; " & @CRLF & _ "r = /f([a-z])/; " & @CRLF & _ "r = /f([a-z]+)*/; " & @CRLF & _ "r = /a(b)c(d)/; " & @CRLF & _ "r = /a(b)?c(d)+?/; " & @CRLF & _ "r =(t|/\*/.test(s)); " & @CRLF & _ " r =(t|/\*/); // коммент " & @CRLF & _ "r =/./.test(s) && f(); " & @CRLF & _ "r=/[a-z]/.test(s) && f(); " & @CRLF & _ "var a = [/a\/, \/b/]; " & @CRLF & _ " a=[/a/,/b/]; " & @CRLF & _ "var o = { r: /./, x: 2 }; // коммент " & @CRLF & _ " o={r:/./,x:2}; " & @CRLF & _ "var x = a && /b/.test(s); " & @CRLF & _ " x = a ? /b/ : /c/;// коммент " & @CRLF & _ " x=a?/b/:/c/; " & @CRLF & _ " x=a?/b\\/:/c\/\\/; // коммент " & @CRLF & _ " x=a?/b\\/:/c\/\\/; // коммент " & @CRLF & _ " x = !/a/.test(s); " & @CRLF & _ " x = f(/./i); " & @CRLF & _ " x=1*s.replace(/^[^\d]*(\d+).*$/,'$1')/2; " & @CRLF & _ " /\s\n\s+\/\/\\\\/.test(s)?f(null):f(/\\/); " & @CRLF & _ " /\s\n\s+\/\/\\\\/.test(s)?f(null):f(/\\fghj[\[fghj\]]kl/), /fght/; " & @CRLF & _ " a=s.search(/\s\n\s+\/f\//gi); " & @CRLF & _ " r=/>\.jjj\n<\s\</ " & @CRLF & _ " .exec(s); " & @CRLF & _ " r=/ \n \s/g, " & @CRLF & _ " t=/'/g " & @CRLF & _ " ; " & @CRLF & _ " " & @CRLF & _ "// Not a regular expressions " & @CRLF & _ "var n = 1/2;// коммент " & @CRLF & _ " n = 1/2/3; " & @CRLF & _ " n = 1/2/p; " & @CRLF & _ " n = 1/(2/p); // коммент " & @CRLF & _ " n = 1/this.n/3; " & @CRLF & _ " n = 1/this.f(5+4)/3; " & @CRLF & _ " n = 1/this.f(2/3); " & @CRLF & _ " n = 1/2 + (function() { return 3/4; })(); " & @CRLF & _ " n = 1/2*(this.x/3 + 2); " & @CRLF & _ " n = 1/2*(this.x + 2/3); " & @CRLF & _ " n =p/2,t=3/p; " & @CRLF & _ " n = f(1/2) + f(3/2);" 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