Javascript function using given argument & object sent from Geolocation

Question

I'm trying to make a function that takes in a users location and then loops through a JSON file of station locations to determine which is the closest station. The issue I am having is with how to include both the location object and the JSON file as arguments in the function.

I am getting the location by using:

function getLocation() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(findNearestStation);
    } else {
        return "James Street";
    }
}

I then want to use the function findNearestStation to take in a JSON as an argument and use the location passed by getLocation to find the nearest station. Something like this:

function findNearestStation(position, json) {
    var UserLat = position.coords.latitude;
    var UserLong = position.coords.longitude;
    for (var i = 0; i < json.stations.length; i++) {
        compare and find the min distance...
    }
}

Any help would be hugely appreciated. Thanks.

Answer 1

Try an anonymous function:

function getLocation() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(function(pos) {
            findNearestStation(pos, json);
        });
    } else {
        return "James Street";
    }
}