javascript - Google Maps DirectionsService multiple calls -

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does know why giving me directions n+1 routes. example a-b-c-d-e-f, give me following routes:

a-b

b-c (empty result)

c-d

d-e (empty result)

e-f

here's google maps code, , i'm calling (inside uiwebview):

showdirections([a, b, c, d, e], true);

var directionsservice = new google.maps.directionsservice();  function showdirections(locations, metric) {  var units = metric ? google.maps.unitsystem.metric : google.maps.unitsystem.imperial;  (i=0; i<locations.length-1; i++) {       console.log('navigating: '+locations[i].title+' '+locations[i+1].title);      var request = {         origin: new google.maps.latlng(locations[i].location.lat, locations[i].location.lng),         destination: new google.maps.latlng(locations[i+1].location.lat, locations[i+1].location.lng),         travelmode: google.maps.directionstravelmode.driving,         avoidhighways: !!(locations[i].avoidhighway),         unitsystem: units     };      settimeout(function() { getdirections(request); }, 2000);  }  window.location = 'directionsstatus://loaded';  }  function renderdirections(directions) {     var directionsdisplay = new google.maps.directionsrenderer;     directionsdisplay.setpanel(document.getelementbyid('panel'));     directionsdisplay.setdirections(directions); }  function getdirections(request) {     directionsservice.route(request, function(response, status) {         if (status == google.maps.directionsstatus.ok) {             renderdirections(response);         } else {             alert(status);             window.location = 'directionsstatus://' + status;         }     }); }


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