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

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?m)(?<=by\n)\w.+" Local $sString = "MIT Sample:" & @CRLF & _ "SOME ASPECTS OF RADIATION INDUCED NUCLEATION IN WATER" & @CRLF & _ "by" & @CRLF & _ "Chih-Ping Tso" & @CRLF & _ "B.Tech., Loughborough University of Technology, United Kingdom" & @CRLF & _ "(1968)" & @CRLF & _ "Submitted in Partial Fulfillment of" & @CRLF & _ "the Requirements for the Degree of" & @CRLF & _ "Master of Science" & @CRLF & _ "at the" & @CRLF & _ "Massachusetts Institute of Technology" & @CRLF & _ "August 1970" & @CRLF & _ "Signature of Author" & @CRLF & _ "Department of Nuclear Engineering" & @CRLF & _ "Certified by" & @CRLF & _ "Thesis Supervisor" & @CRLF & _ "Accepted by" & @CRLF & _ "Chairman, Departmental Committee" & @CRLF & _ "Archives on Graduate Students" & @CRLF & _ "MASS. INST. TECH." & @CRLF & _ "SEP 21 1970" & @CRLF & _ "LIBRARIES" & @CRLF & _ "" & @CRLF & _ "----------------------------------------------" & @CRLF & _ "Virginia Tech Sample:" & @CRLF & _ "FORMATTING VARIABLES AND TYPEFACE VARIATIONS" & @CRLF & _ "OF" & @CRLF & _ "DOT-MATRIX PRINT AND THEIR EFFECT" & @CRLF & _ "ON" & @CRLF & _ "READING COMPREHENSION AND READING SPEED" & @CRLF & _ "by" & @CRLF & _ "James A. Holmes" & @CRLF & _ "Dissertation submitted to the Faculty of the" & @CRLF & _ "Virginia Polytechnic Institute and State University" & @CRLF & _ "in partial fulfillment of the requirements for the degree of" & @CRLF & _ "DOCTOR OF EDUCATION" & @CRLF & _ "in" & @CRLF & _ "Vocational and Technical Education" & @CRLF & _ "March, 1986" & @CRLF & _ "Blacksburg, Virginia" 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