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

/
/
gm

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 = "(?m)(?P<release>(?:0|[1-9])\d*(?:\.(?:0|[1-9]\d*)){2})(?:-(?P<pre>(?P<prel>a|b|rc)(?P<pren>(?:0|[1-9])\d*)))?(?:\+(?P<local>[a-z\d]+(?:[-_\.][a-z\d]+)*))?" Local $sString = "Valid PEP440 Verions" & @CRLF & _ "" & @CRLF & _ "Final versions" & @CRLF & _ "0.9" & @CRLF & _ "0.9.1" & @CRLF & _ "0.9.2" & @CRLF & _ "0.9.10" & @CRLF & _ "0.9.11" & @CRLF & _ "1.0.1" & @CRLF & _ "2.0.1" & @CRLF & _ "" & @CRLF & _ "Version epochs" & @CRLF & _ "1.0" & @CRLF & _ "1.1" & @CRLF & _ "2.0" & @CRLF & _ "2013.10" & @CRLF & _ "2014.04" & @CRLF & _ "2013.10" & @CRLF & _ "2014.04" & @CRLF & _ "1!1.0" & @CRLF & _ "1!1.1" & @CRLF & _ "1!2.0" & @CRLF & _ "" & @CRLF & _ "Examples of compliant version schemes" & @CRLF & _ "Simple "major.minor" versioning:" & @CRLF & _ "0.1" & @CRLF & _ "0.2" & @CRLF & _ "0.3" & @CRLF & _ "1.0" & @CRLF & _ "1.1" & @CRLF & _ "Simple "major.minor.micro" versioning:" & @CRLF & _ "1.1.0" & @CRLF & _ "1.1.1" & @CRLF & _ "1.1.2" & @CRLF & _ "1.2.0" & @CRLF & _ ""major.minor" versioning with alpha, beta and candidate pre-releases:" & @CRLF & _ "0.9" & @CRLF & _ "1.0-a1" & @CRLF & _ "1.0-a2" & @CRLF & _ "1.0.7-b1" & @CRLF & _ "1.0.34-rc1" & @CRLF & _ "1.0" & @CRLF & _ "1.1.0-a1" & @CRLF & _ ""major.minor" versioning with developmental releases, release candidates and post-releases for minor corrections:" & @CRLF & _ "0.9" & @CRLF & _ "1.0.dev1" & @CRLF & _ "1.0.dev2" & @CRLF & _ "1.0.dev3" & @CRLF & _ "1.0.dev4" & @CRLF & _ "1.0c1" & @CRLF & _ "1.0c2" & @CRLF & _ "1.0" & @CRLF & _ "1.0.post1" & @CRLF & _ "1.1.dev1" & @CRLF & _ "Date based releases, using an incrementing serial within each year, skipping zero:" & @CRLF & _ "2012.1" & @CRLF & _ "2012.2" & @CRLF & _ "2012.3" & @CRLF & _ "2012.15" & @CRLF & _ "2013.1" & @CRLF & _ "2013.2" & @CRLF & _ "The following example covers many of the possible combinations:" & @CRLF & _ "1.0.dev456" & @CRLF & _ "1.0a1" & @CRLF & _ "1.0a2.dev456" & @CRLF & _ "1.0a12.dev456" & @CRLF & _ "1.0a12" & @CRLF & _ "1.0b1.dev456" & @CRLF & _ "1.0b2" & @CRLF & _ "1.0b2.post345.dev456" & @CRLF & _ "1.0b2.post345" & @CRLF & _ "1.0rc1.dev456" & @CRLF & _ "1.0rc1" & @CRLF & _ "1.0" & @CRLF & _ "1.0+abc.5" & @CRLF & _ "1.0+abc.7" & @CRLF & _ "1.0+5" & @CRLF & _ "1.0.post456.dev34" & @CRLF & _ "1.0.post456" & @CRLF & _ "1.1.dev1" 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