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"
"
gm

Test String

Code Generator

Language

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?m)(?:\s*([a-zA-Z()+ ]+?)[ =]*)([-+]?\d+\.?\d*)" Local $sString = "Molecular weight = 43057.32 Residues = 391 " & @CRLF & _ "Average Residue Weight = 110.121 Charge = -10.0" & @CRLF & _ "Isoelectric Point = 4.8926" & @CRLF & _ "" & @CRLF & _ "Residue Number Mole% DayhoffStat" & @CRLF & _ "A = Ala 24 6.138 0.714 " & @CRLF & _ "B = Asx 0 0.000 0.000 " & @CRLF & _ "C = Cys 9 2.302 0.794 " & @CRLF & _ "" & @CRLF & _ "Property Residues Number Mole%" & @CRLF & _ "Tiny (A+C+G+S+T) 135 34.527" & @CRLF & _ "Small (A+B+C+D+G+N+P+S+T+V) 222 56.777" & @CRLF & _ "Aliphatic (A+I+L+V) 97 24.808" 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