Question

我使用google api中的一个功能在地图上绘制一个方法，它可以很好地支持mehode：

calculateAndDisplayRoute(directionsService, directionsDisplay) {

var waypts = [];
// var jsonData = JSON.parse(this.city);

if (!this.isArrayEmpty(this.stations)) {

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

    waypts.push({
      location: this.stations[i].station,
      stopover: true
    });

  }
}

directionsService.route({
  origin: this.depart,
  destination: this.arrivee,
  waypoints: waypts,
  optimizeWaypoints: false,
  travelMode: 'DRIVING'
}, function (response, status) {
  if (status === 'OK') {
    directionsDisplay.setDirections(response);
    var route = response.routes[0];

     let momo;

    // For each route, display summary information.
    for (var i = 0; i < route.legs.length; i++) {
      var routeSegment = i + 1;
    alert('coco');

       let dt = new Date(route.legs[i].duration.value*1000);
       let hr = dt.getHours();
       let m = "0" + dt.getMinutes();
       let s = "0" + dt.getSeconds();
      let durationn= hr+ ':' + m.substr(-2) + ':' + s.substr(-2); //this gives 02:35:45 for exemple
      /*
      //I tried this this code in comment but it doesnt work.
       let time1=durationn;
       momo=time1;

         let [hours1, minutes1, seconds1] = time1.split(':');
         let [hours2, minutes2, seconds2] = momo.split(':');
      momo=moment({ hours: hours1, minutes: minutes1, seconds: seconds1 })
   .add({ hours: hours2, minutes: minutes2, seconds: seconds2 })
   .format('h:mm:ss')
   */

       console.log('mm'+ route.legs[i].start_address + '  '+route.legs[i].end_address +' '+route.legs[i].distance.text+' '+route.legs[i].duration.text);


      console.log( momo);


    }
  } else {
    window.alert('Directions request failed due to ' + status);
  }
});

  }

但我的问题在于持续时间，我会解释，我希望每次这个功能被调用，我需要持续时间被起诉（持续时间的总和）。我在评论中尝试了这个代码，但它不起作用。 PS：请不要浪费时间去理解代码，只关注第二个for loop block中的内容。

Answer 1

你可以这样做：

var sum = {h: 0, m: 0, s: 0};
var allTimes = ["02:35:45", "11:40:30", "12:55:39"];

allTimes.forEach(time => sum = sumUp(sum, time)); // Just sum up hour, minute and second
console.log(parseSum(sum));  // Do formatting in the end

function sumUp(sum, time) { 
    var times = time.split(":");
    sum.h += +times[0];
    sum.m += +times[1];
    sum.s += +times[2];
    return sum;
}

function parseSum(sum) {
    var totSec = sum.s;
    var s = totSec % 60;
    var totMin = sum.m + parseInt(totSec/60);
    var m = totMin % 60;
    var totHour = sum.h + parseInt(totMin/60);
    var h = totHour;
    return `${h}:${m}:${s}`;
}

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1 个答案: