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
No Match

r"
"
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 = "([\w*-′]*([\[(]([\[(]?[a-zA-Zα-ωΑ-Ωµ\-′,:]+\d?[+-]?[\])]?)+[\])\d+-]{1,})[\w*-′]*)|(([A-z]+[a-z]*\d)+([A-z]+[a-z]*\d?)*)" Local $sString = ""Fe(iii) or iron(iii) [Fe(Rtpen)X](A)n, n = 1, 2; X = Cl, Br; Rtpen = N-alkyl-N,N′,N′-tris(2-pyridylmethyl)ethane-1,2-diamine, alkyl = R = CH3CH2, CH3CH2CH2, HOCH2CH2, (CH3)2CH, C6H5, and C6H5CH2; A = ClO4, PF6."" & @CRLF & _ ""iron(iii) " & @CRLF & _ "[Fe(Rtpen)(η1-OCH3)]2+ " & @CRLF & _ "[Fe(Rtpen)(η1-OOH)]2+ from iron(ii)"" & @CRLF & _ ""[FeIIIOOH]2+ rather than [FeIIIOO]+ species are the p"" & @CRLF & _ "[(Rtpen)Fe(µ,η2:η2-O2)Fe(Rtpen)]4+" & @CRLF & _ "iron(iii)" & @CRLF & _ "Fe(iii)" & @CRLF & _ "[FeIIIOOH]2+" & @CRLF & _ "[Fe(Rtpen)Cl]+" & @CRLF & _ "[Fe(Rtpen)(η1-OOH)]2+" & @CRLF & _ "[Fe(Rtpen)X](A)n" & @CRLF & _ "[(Rtpen)Fe(µ,η2:η2-O2)Fe(Rtpen)]4+" & @CRLF & _ " Fe(Rtpen)(η2-OO)]+," & @CRLF & _ "N′-tris(2-pyridylmethyl)ethane-1,2-diamine" & @CRLF & _ "of [Fe(Rtpen)(η1-OOH)]2+ pro" & @CRLF & _ " (ESR, UV-vis, ESI MS) " & @CRLF & _ " [Fe(Rtpen)(η1-OOH)]2+, R = CH3CH2, CH3CH2CH2, HOCH2CH2, (CH3)2CH, C6H5, and C6H5CH2." & @CRLF & _ "f [Fe(ettpen)Cl]ClO4 instead of [Fe(bztpen)Cl]ClO4 " & @CRLF & _ "[Fe(Rtpen)Cl]A, A = ClO4, PF6, are as expected ESR silent." & @CRLF & _ "[Fe(Rtpen)Cl](PF6) and [Fe(Rtpen)Cl](PF6)2" & @CRLF & _ "e µ-oxo complex [(bztpen)ClFe(µ-O)FeCl(bztpen)](PF6)2 which could be isolated." & @CRLF & _ "H2O" & @CRLF & _ "[Fe(bztpen)Cl](ClO4)2" & @CRLF & _ " solution at 100 K, a rhombic low-spin signal (g = 2.32, 2.14, 1.93) is present in the spectra of the Fe(iii) complexes (Fig. 3a)" & @CRLF & _ ")." & @CRLF & _ "" & @CRLF & _ "metpen–Fe(iii)–peroxide complexes, lead to assignment of end-on coordination for the hydroperoxide species, e.g., [Fe(Rtpen)(η1-OOH)]2+, and side-on (η2) peroxide coordination in their deprotonated derivatives, e.g., [Fe(Rtpen)(η2-OO)]+ (Scheme 1)" 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