Question

我有以下代码：

for (lo = 0; lo < newobj.length; lo++) {
  lon = '{"lons":' + newobj[lo].longitude;
  lat = ',"lats":' + newobj[lo].latitude + '}';
  var string = '[' + lon + lat + ']';
  var obj = JSON.parse(string);
}

此后，我不知道如何继续获得预期的结果。

API上的数据示例。实际上，我只需要在纬度和经度上在铯上绘制广告牌即可。

[

    {"description": "aaa", "address": "bbb", "latitude": "1.34791838898824", "longitude": "103.8487501254"},
    {"description": "ddd", "address": "ccc", "latitude": "1.37026158388488", "longitude": "103.839467898898"},
    ....
]

预期结果：

var dots=[{lon:103.84606,lat:1.3694},{lon:103.8447,lat:1.3697},…]

Answer 1

为什么要全部转换成字符串？

您可以这样简单地完成

var dots = [];
for (lo = 0; lo < newobj.length; lo++) {
  dots.push({
    'lons': newobj[lo].longitude,
    'lats': newobj[lo].latitude
  });
}

Answer 2

使用Array.map：https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map

var newobj = [ {longitude : 103.84606 , latitude: 1.3694 }
             , {longitude : 103.8447 , latitude: 1.3697 }
             ]
         
var dots = newobj.map(elm=>({ lon: elm.longitude, lat: elm.latitude }) )

console.log( dots )

如果您绝对要循环：

var newobj = [ {longitude : 103.84606 , latitude: 1.3694 }
             , {longitude : 103.8447 , latitude: 1.3697 }
             ]
             
var dots = []
for (let elm of newobj) {
  dots.push({ lon: elm.longitude, lat: elm.latitude })
}

console.log( dots )

Answer 3

尝试一下：

let dots= [];
for (lo = 0; lo < newobj.length; lo++) {
        lon= {
          "lons":newobj[lo].longitude,
        "lats":newobj[lo].latitude
};
dots.push(lon);
}

Answer 4

尝试一下。

var dots = [];
for (lo = 0; lo < newobj.length; lo++) {
    var obj = {};
    obj.lon = newobj[lo].longitude;
    obj.lat = newobj[lo].latitude;
    dots.push(obj);
}

Answer 5

const newObjArr = []

for (lo = 0; lo < newobj.length; lo++) {
    newObjArr.push([{lons: newobj[lo].longitude, lat: newobj[lo].latitude}])
}

如何使用For Loop将多个对象写入Array？

5 个答案: