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Smart RegEx - MultiPattern

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Hello ,
can you please advise a regex to handle any of the following


Input :
" march30 ,2013"
"March 30 ,2013"
"March 30, 2013"
"March 30, 2013 "
"March30 ,2013"
" March 6 , 2013 "
" March8,2013"

Basically all imaginable combinations of lowercase-uppercase , position-of-space , number-of-spaces , position-of-comma , comma-can-be-dot sometimes.
So it should read within quotes , search for word "march" (in any case) two|one digit occurrence together would be the date , 4 digit together would be year.

Output Consistent :
|"March 3, 2013"|

This works , however , there will be too many combinations to do,

$line_read = StringRegExpReplace($line_read, '["]March((\d{1})|(\d{2}))[,][\h](\d{4})["]', '|March $1, $4|')

A slightly advanced ask would be to also use similarity , function from here :

to check for close spellings to march and finally output as a consistent "march".

Side Question 1 : 
Simplest method to return the position of occurence of regex.
This works , but how to search from right.

Local $string = "abcdefghijklmn555opqrstuvmxyz"

MsgBox(0, "", _StringPos($string, "\d\d\d") )

Func _StringPos($sString, $sSearch)
    StringRegExp($string, "(?=" & $sSearch & ")", 1)
    Return @error ? 0 : @extended


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When it comes to really complex regex, first thing I'd do is strip out as many variables as I can.


  • StringStripWS($line_read, $STR_STRIPALL) to remove having to deal with whitespace
  • StringReplace($line_read, ".", ",") to remove any chance of a period being used
  • StringLower($line_read) OR StringUpper($line_read) to remove having to deal with both upper and lower case

Once all that is done then do your regex


My UDFs are generally for me. If they aren't updated for a while, it means I'm not using them myself. As soon as I start using them again, they'll get updated.


Active: IRC UDF, WindowEx UDF
Discontinued: GithubBubbleSort UDF

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This seems to work quite well on your examples:

#include <Array.au3>

Global $aDates[] = [" march30 ,2013", _
                    "March 30 ,2013", _
                    "March 30, 2013", _
                    "March 30, 2013 ", _
                    "March30 ,2013", _
                    " March 6 , 2013 ", _
                    " March8,2013"]

For $i = 0 To UBound($aDates) - 1

    $aDates[$i] = StringRegExpReplace($aDates[$i], "(?iU)^.*(march).*(\d{1,2}?).*[\,\.].*(\d\d\d\d).*$", "$1 $2, $3")


_ArrayDisplay($aDates, "", Default, 8)
(?iU)         case insensitive and greedy
^.*           start at the beginning of the string
(march)       capture "march"
.*            possible characters until
(\d{1,2}?)    capture either one or 2 digits
.*            possible characters
[\,\.]        but at least a comma or period
.*            possible characters
(\d\d\d\d)    capture 4 digits
.*$           possible characters util the end of the string

$1 $2, $3     write the captured groups in the required format


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:


ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area


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Try this one :

Local $aString = [" march30 ,2013", _
                    "March 30 ,2013", _
                    "March 30, 2013", _
                    "March 30, 2013 ", _
                    "March30 ,2013", _
                    " March 6 , 2013 ", _
                    " March8,2013"]

For $i = 0 To UBound($aString) - 1
    $date = StringRegExpReplace($aString[$i], "(?i)\s*march\s*(\d\d?)\s*.\s*(\d{4})\s*", "|""March $1, $2""|")
    ConsoleWrite($date & @CRLF)


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About typing errors you can benefit reading this:


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Here is another example, where the function _FormatDates() reformats one or more dates in a string.

" january30 ,2013"
"February 28 ,2014"
"March 27, 2015"
"april 26, 2016 "
"May 5 ,2017"
" June6 , 2018 "
" july8,2019"

Global $sDates = StringRegExpReplace(FileRead(@ScriptFullPath), "(?s)^.*?#cs\v+|\v+#ce.*", "")
ConsoleWrite(_FormatDates($sDates) & @CRLF)

Func _FormatDates($sString) ; Month dd, YYYY
    Local $a = StringRegExp($sString, '(?i)"\h*([a-z]+)\h*(\d{1,2})\h*[\,\.]?\h*(\d{4})\h*"', 3)
    Local $sRet
    For $i = 0 To UBound($a) - 1 Step 3
        $sRet &= StringUpper(StringLeft($a[$i], 1)) & StringTrimLeft($a[$i], 1) & " " & StringRight("00" & $a[$i + 1], 2) & ", " & $a[$i + 2] & @CRLF
    Return StringTrimRight($sRet, 2) ; Remove trailing @CRLF
EndFunc   ;==>_FormatDates


Edited by Malkey

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And another one...  :)

$string = " jaNuary30 ,2013  "

$res = '|"' & Execute(StringRegExpReplace($string, _ 
        '\h*(\w)([[:alpha:]]+)\h*(\d+)\h*[,.]\h*(\d{4})\h*', _ 
        "StringUpper('$1') & StringLower('$2') & ' $3, $4' & ") & "''") & '"|'

Msgbox(0,"", $res)


Edit for side question

Local $string = "abcdefa555gh"

MsgBox(0, "", _StringPos($string, "\d\d\d") )

Func _StringPos($sString, $sSearch)
    StringRegExp($string, "(?=" & $sSearch & ")", 1)
    $pos1 = @error ? 0 : @extended
    Return StringLen($sString)-$pos1+1


Edited by mikell

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