Javascript Pass Parameter To Callback Or Set Variable Value In Distancematrixstatus

I have been playing a little bit with Google's DistanceMatrixService. The code below works, but, how can I pass another parameter to the callback function or grab one of the values

Solution 1:

You can't change how Google calls the callback, but you can let it call your own locally function as the callback and then have that (via a closure) call another callback after adding the desired extra argument like this:

functionGoogleMapDistance(YourLatLong,DestLatLong, item)
{
    var service = new google.maps.DistanceMatrixService();
    service.getDistanceMatrix(
    {
    origins: [YourLatLong],
    destinations: [DestLatLong],
    travelMode: google.maps.TravelMode.DRIVING,
    unitSystem: google.maps.UnitSystem.IMPERIAL,
    avoidHighways: false,
    avoidTolls: false
    }, function(response, status) {callback(response, status, item)});
}

Or, you could just define your callback inline so it has access to the parent function variables directly:

function GoogleMapDistance(YourLatLong,DestLatLong, item)
{
    varservice=newgoogle.maps.DistanceMatrixService();
    service.getDistanceMatrix(
    {
    origins: [YourLatLong],
    destinations: [DestLatLong],
    travelMode: google.maps.TravelMode.DRIVING,
    unitSystem: google.maps.UnitSystem.IMPERIAL,
    avoidHighways: false,
    avoidTolls: false
    }, function callback(response, status)
    {
        // you can access the parent scope arguments like item hereif (status == google.maps.DistanceMatrixStatus.OK)
        {
        varorigins= response.originAddresses;
        vardestinations= response.destinationAddresses;
          for (vari=0; i < origins.length; i++)
          {
              varresults= response.rows[i].elements;
              for (varj=0; j < results.length; j++)
              {
                  varelement= results[j];
                  varfrom= origins[i];
                  varto= destinations[j];
                  vardistance= element.distance.text;
                  varduration= element.duration.text;
                  varResultStr= distance + "&nbsp; (<i>" + duration + "</i>)";
              }
          }
        document.getElementById("Results1").innerHTML = ResultStr;
        }
    }

)}