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