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(AutoIt) Check if Integer Exists at JSON PathDemonstrates how to get an integer value at a JSON path, and how to check to see if it exists.
$oJson = ObjCreate("Chilkat.JsonObject") Local $bSuccess ; 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 |
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