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]
  • Character class intersection
    [\w&&[^\d]]
  • 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 = "(.+):(\d+):\s*(syntax\serror,\s)?(.+)" Local $sString = "C:/Users/Landon/Desktop/bad.rb:2: syntax error, unexpected =>, expecting '}'" & @CRLF & _ " 'key' => 'value'," & @CRLF & _ " ^" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:2: syntax error, unexpected ',', expecting '}'" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: syntax error, unexpected =>, expecting '}'" & @CRLF & _ " 'other key' => 'value missing closing tick" & @CRLF & _ " ^" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: unterminated string meets end of file" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: can't find string "asdf" anywhere before EOF" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: unknown regexp optionwxyz - asdf" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: invalid multibyte char (asdf)" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: unterminated regexp meets end of file" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: unterminated here document identifier" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: incomplete character syntax" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: unterminated quoted string meets end of file" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: `$' without identifiers is not allowed as a global variable name" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: `$asdf' is not allowed as a global variable name" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: `@' without identifiers is not allowed as an instance variable name" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: `@@' without identifiers is not allowed as a class variable name" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: `@asdf' is not allowed as an instance variable name" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: `@@asdf' is not allowed as a class variable name" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: embedded document meets end of file" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: Invalid char `\\x%02X' in expression" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: string literal encodings differ (asdf / wxyz)" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: identifier %"PRIsVALUE" is not valid to get" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: identifier asdf is not valid to get" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: identifier %"PRIsVALUE" is not valid to set" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: invalid local variable - asdf" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: both block arg and actual block given" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: Can't set variable $asfd" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: block argument should not be given" & @CRLF & _ "C:/Users/Landon/Desktop/bad.rb:3: regexp encoding option 'asdf' differs from source encoding 'wxyz'" 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