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I need some regex help

I inherited some data :)

The data is massive and I need a clean, fast solution :mad:

source is text and complex.  

I need to find dates such as "31-01-2018" and replace with "31-JAN-2018"

Problem is that my regex "31-01-2018" takes for ever and replaces all.

The ideal would be to search like this, but I am not managing

\d{2}-(01)-\d{4} replace (01) with JAN

But if I do it that way, the entire search string gets replaced by JAN.  This is not an error, but typically regex behaviour.  Any ideas?



Why is the snake in the sky?

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Another possible solution :)

#include <Date.au3>
#include <DateTimeConstants.au3>
#include <StringConstants.au3>

Global $arrDates[12] = ["31-01-2019", "01-02-2019", "02-03-2019", "03-04-2019", "04-05-2019", "05-06-2019", _
                        "06-07-2019", "07-08-2019", "08-09-2019", "09-10-2019", "10-11-2019", "11-12-2019"]

For $i = 0 To UBound($arrDates) - 1 Step 1
    ConsoleWrite("Old Date: " & $arrDates[$i] & @CRLF & _
                 "New Date: " & _MonthDigit2String($arrDates[$i]) & @CRLF & @CRLF)

Func _MonthDigit2String($strDate)

    Local $arrResult = StringRegExp($strDate, "\d{2}\-(\d{2})\-\d{4}", $STR_REGEXPARRAYMATCH), _
          $strMonth = (IsArray($arrResult) ? $arrResult[0] : 0)

    If $strMonth > 0 Then Return StringRegExpReplace($strDate, "(\d{2}\-)\d{2}(\-\d{4})", "$1" & _DateToMonth($strMonth, $DMW_SHORTNAME) & "$2")

    ; Executed only if $strMonth <= 0
    Return False



Edited by FrancescoDiMuro

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This might work.

Local $str = 'I need to find dates such as "31-01-2018" and "21-02-2018"' & @CRLF & _
        ' 13-3-2018 and "1-4-2018"'

Local $aMnth[13] = [12, "JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"]

Local $sModifiedStr = Execute("'" & StringRegExpReplace($str, "(\d{1,2}).(\d{1,2}).(\d{2,4})", "'&$1&'-'&$aMnth[$2]&'-$3") & "'")

; Or
;Local $sModifiedStr = Execute("'" & StringRegExpReplace($str, "(\d{1,2}).(\d{1,2}).(\d{2,4})", "'&StringRight('00'&$1,2)&'-'&$aMnth[$2]&'-$3") & "'") ; One digit day (n) to two digit day (0n).

ConsoleWrite($sModifiedStr & @CRLF)


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