Question

如果我有一个从JSON解析的对象数组，例如：

 var results =  [
  {
  "time": 1478542485,
  "lat": 50.64470631082,
  "lng": 13.9902814650912
   },
   {
  "time": 1479542485,
  "lat": 50.64570631082,
  "lng": 13.9902814650912
   },
   {
  "time": 1578542485,
  "lat": 50.64473631082,
  "lng": 13.9902814650912
   }
 }
]

如何将它们推入数组，以便每个数组对象看起来像：

 var marker = L.marker([50.64470631082, 13.9902814650912], {time: 1478542485});

这是我到目前为止所做的事情

var markers = [];
    for (var i = 0; i < results.length; i++){
        var latln = new L.LatLng(results[i].lat, results[i].lng);
        var time =   results[i].time;
        var t = '{time: ' + time + '}';
        var mark = L.marker(latln, t.replace("\'",""));
        markers.push(mark);
    }

我有LatLng权利，但时机不对。我正在尝试使用Leaflet Slider并将数据显示在地图上。

Answer 1

结合Mahi和Tibrogargan的答案，我使用此

使其工作

   var markers = results.map( function(b){
        return (L.marker(new L.LatLng(b.lat, b.lon), { time: b.time}))
    });

谢谢你们，伙计们

Answer 2

这是对Array.prototype.map的直接使用。使用函数（在本例中为箭头函数）调用.map()，该函数生成基于现有元素（传递给函数的参数）的新元素。 map的返回值是一个包含新元素的新数组。

// ------------------8<----------------------
// LeafletStub is just here to provide mock ups of the functions called in the `L` object 
function LeafletStub() {
}
LeafletStub.prototype.LatLng = function(lat, lng) {
  return `lat: ${lat}, lng: ${lng}`; }
LeafletStub.prototype.marker = function(latlng, time) {
  return `latlng: {${latlng}}, time: ${time.time}`; }
var L = new LeafletStub();
// ------------------8<----------------------

var inputObj = [{
  "time": 1478542485,
  "lat": 50.64470631082,
  "lng": 13.9902814650912
}, {
  "time": 1479542485,
  "lat": 50.64570631082,
  "lng": 13.9902814650912
}, {
  "time": 1578542485,
  "lat": 50.64473631082,
  "lng": 13.9902814650912
}]

// answer really starts here.
var markers = inputObj.map( element => L.marker(L.LatLng(element.lat, element.lng), { time: element.time } ) );

console.log(markers);

Answer 3

＆＃13;

 var results =  [
  {
  "time": 1478542485,
  "lat": 50.64470631082,
  "lng": 13.9902814650912
   },
   {
  "time": 1479542485,
  "lat": 50.64570631082,
  "lng": 13.9902814650912
   },
   {
  "time": 1578542485,
  "lat": 50.64473631082,
  "lng": 13.9902814650912
   }
 
]
var a= results.map(function(b){
return [[b.lat,b.lng],{"time":b.time}];
});


console.log(a);

＆＃13;

LeafLet：将数组对象添加到滑块中

3 个答案: