AutoIt

Check if Integer Exists at JSON Path

Demonstrates how to get an integer value at a JSON path, and how to check to see if it exists. AutoIt

Local $bSuccess = False

$oJson = ObjCreate("Chilkat.JsonObject")

;  First build simple JSON..
$oJson.UpdateInt("test.abc",100)

$oJson.EmitCompact = False
ConsoleWrite($oJson.Emit() & @CRLF)

;  This is our JSON:
;  {
;    "test": {
;      "abc": 100,
;    }
;  }

Local $sPath = "test.notHere"

;  The call to IntOf will return 0, because it's not present.
;  But how do we know if it really was present, and the value was truly 0?
Local $iVal = $oJson.IntOf($sPath)
ConsoleWrite("val = " & $iVal & @CRLF)

;  We cannot use LastMethodSuccess because LastMethodSuccess only applies
;  to methods that:
;  - return a string
;  - return a new Chilkat object, binary bytes, or a date/time.
;  - returns a boolean status where True = success and False = failed.
;  - returns an integer where failure is defined by a return value less than zero.
;  The IntOf method fits none of these requirements, and therefore the LastMethodSuccess 
;  is not a valid indicator..
Local $bWasFound = $oJson.LastMethodSuccess
ConsoleWrite("wasFound = " & $bWasFound & " (not a valid indicator)" & @CRLF)

;  Instead, if the returned value is 0, we can double-check to see if the member was truly there..
If ($iVal = 0) Then
    $bWasFound = $oJson.HasMember($sPath)
    ConsoleWrite("wasFound = " & $bWasFound & @CRLF)
    If ($bWasFound = True) Then
        ConsoleWrite("The value was present and is 0." & @CRLF)
    Else
        ConsoleWrite("no member is present at test.notHere" & @CRLF)
    EndIf

Else
    ConsoleWrite("val = " & $iVal & @CRLF)
EndIf

;  Alternatively, you could check to see if the member exists beforehand..
If ($oJson.HasMember($sPath) = True) Then
    ConsoleWrite("val = " & $oJson.IntOf($sPath) & @CRLF)
Else
    ConsoleWrite("no member at " & $sPath & @CRLF)
EndIf