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Regular Expression Replace Full Matches

See more Regular Expressions Examples

Demonstrates replacing the full matches of a regular expression.

Note: Chilkat uses PCRE2. See PCRE2 Regular Expressions
Also see: PCRE2 Performance

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Local $bSuccess = False

$bSuccess = False

Local $subject = "John Anders, +_+_+ Mary Robins $$$$"
Local $sPattern = "\w+\s+\w+"

$oSb = ObjCreate("Chilkat.StringBuilder")
$oSb.Append($subject)

$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.EmitCompact = False

Local $iTimeoutMs = 2000
Local $iNumMatches = $oSb.RegexMatch($sPattern,$oJson,$iTimeoutMs)
If ($iNumMatches < 0) Then
    ; Probably an error in the regular expression.
    ; Suggestion: Use AI to help create and/or diagnose regular expressions.
    ConsoleWrite($oSb.LastErrorText & @CRLF)
    Exit
EndIf

; Examine the matches:
ConsoleWrite($oJson.Emit() & @CRLF)

; {
;   "match": [
;     {
;       "group": [
;         {
;           "cap": "John Anders",
;           "idx": 0,
;           "len": 11
;         }
;       ]
;     },
;     {
;       "group": [
;         {
;           "cap": "Mary Robins",
;           "idx": 19,
;           "len": 11
;         }
;       ]
;     }
;   ]
; }

$oSbTemp = ObjCreate("Chilkat.StringBuilder")

Local $i = 0
$iNumMatches = $oJson.SizeOfArray("match")
While $i < $iNumMatches

    $oJson.I = $i

    ; The full match is always in group 0.
    $oSbTemp.Clear 
    $oJson.StringOfSb("match[i].group[0].cap",$oSbTemp)

    ; Indicate that we wish to replace the full match with it's value converted to uppercase.
    $oSbTemp.ToUppercase()
    $oJson.UpdateSb("match[i].group[0].rep",$oSbTemp)

    $i = $i + 1
Wend

; The JSON now has replacement strings:
ConsoleWrite($oJson.Emit() & @CRLF)

; {
;   "match": [
;     {
;       "group": [
;         {
;           "cap": "John Anders",
;           "idx": 0,
;           "len": 11,
;           "rep": "JOHN ANDERS"
;         }
;       ]
;     },
;     {
;       "group": [
;         {
;           "cap": "Mary Robins",
;           "idx": 19,
;           "len": 11,
;           "rep": "MARY ROBINS"
;         }
;       ]
;     }
;   ]
; }

; Call RegexReplace to update the StringBuilder with the replacements.
$bSuccess = $oSb.RegexReplace($oJson)
If ($bSuccess = False) Then
    ConsoleWrite($oSb.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Result after doing replacements:" & @CRLF)
ConsoleWrite($oSb.GetAsString() & @CRLF)

; Result after doing replacements:
; JOHN ANDERS, +_+_+ MARY ROBINS $$$$