I have an issue to find a routing service for each user in here map

Question

i'm using here map to find a Route of multiple users and destination. I type new york in search bar and hit search button, let suppose api return array of ten users. Now i want to get routing service for each users.

for(var i=0; i< aws_data.length; i++)
{

    aws_possition = 
    {
        lat: aws_data[i].lat,
        lng: aws_data[i].lng
    };
    lat2 = aws_possition.lat;
    lng2 = aws_possition.lng;

    var router = platform.getRoutingService(),
        parameters = {
                waypoint0: lat1+","+lng1,
                waypoint1: lat2+","+lng2,
                mode: 'fastest;car;traffic:enabled',
                departure: 'now'
        };
}

Now when i run this code platform.getRoutingService is run 10 times before giving me result of each user. here is my complete for loop code.

   for(var i=0; i< aws_data.length; i++)
{

    aws_possition = 
    {
        lat: aws_data[i].lat,
        lng: aws_data[i].lng
    };
    lat2 = aws_possition.lat;
    lng2 = aws_possition.lng;

    var router = platform.getRoutingService(),
        parameters = {
                waypoint0: lat1+","+lng1,
                waypoint1: lat2+","+lng2,
                mode: 'fastest;car;traffic:enabled',
                departure: 'now'
        };
        console.log(parameters);
        //debugger;
    router.calculateRoute(parameters,
            function (result) {

            }


}

Answer 1

Hello Farrakh and welcome to Stack Overflow. If you are using this API then you can map your data to promises (note that promises need to be polifilled for IE and (very) old browsers)

const router = platform.getRoutingService(),
  waypoint1 = aws_possition.lat + ',' + aws_possition.lng,
  mode = 'fastest;car;traffic:enabled',
  departure = 'now';
Promise.all(
  aws_data.map(
    ({ lat, lng, id }) =>
      console.log(`processing ${id}`) ||
      new Promise((resolve, reject) =>
        router.calculateRoute(
          {
            waypoint0: lat + ',' + lng,
            waypoint1,
            mode,
            departure,
          },
          (result)=>resolve([id,result]),
          reject,
        ),
      ),
  ),
).then(
  (results) => console.log('I have results:', results),
  (error) => console.log('something went wrong:', error),
);