How Do I write multiple objects into Array using For Loop?

Question

I have following codes:

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);
}

Thereafter, I do not know how to continue to get the expected outcome.

Example of data on the API. I actually just need the latitude and longitude to plot a billboard on cesium.

[

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

Expected outcome:

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

Example of data on the API. I actually just need the latitude and longitude to plot a billboard on cesium. [{"description":"aaa","address":"bbb","latitude":"1.34791838898824","longitude":"103.8487501254"},{"description":"ddd","address":"ccc","latitude":"1.37026158388488","longitude":"103.839467898898"},....] — ywologist
– ywologist, Commented Oct 18, 2019 at 5:52

Kiran Shinde · Accepted Answer · 2019-10-18 05:43:04Z

1

Why are you converting all in strings?

You can simply do it like this

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

answered Oct 18, 2019 at 5:43

Kiran Shinde

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Comments

Mister Jojo · Accepted Answer · 2019-10-18 06:09:08Z

1

use 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 )

If you absolutely want a loop:

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 )

edited Oct 18, 2019 at 6:09

answered Oct 18, 2019 at 5:50

Mister Jojo

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Comments

Swapnil N · Accepted Answer · 2019-10-18 05:43:38Z

0

Try this :

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

answered Oct 18, 2019 at 5:43

Swapnil N

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Comments

shubham-gupta · Accepted Answer · 2019-10-18 05:44:12Z

0

Try this.

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

answered Oct 18, 2019 at 5:44

shubham-gupta

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Comments

NullDev · Accepted Answer · 2019-10-18 11:02:23Z

0

const newObjArr = []

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

edited Oct 18, 2019 at 11:02

NullDev

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answered Oct 18, 2019 at 6:03

Pen Lymeng

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