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I have three same sized arrays, lat[], lon[], title[]. I need to create an object in this format

locations = [ { lat: 45.4654, lon: 9.1866, title: 'Milan, Italy' }, { lat: 47.36854, lon: 8.53910, title: 'Zurich, Switzerland' }, { lat: 48.892, lon: 2.359, title: 'Paris, France' } ];

And I have done this so far

 var locations = {}; var lat = [1, 2, 3]; var lon = [4, 5, 6]; var title = ['title 1', 'title 2', 'title 3']; var numLocation = $lat.length; for (var j=0; j < numLocation; j++) { locations[j] = {}; locations[j].lat = lat[j]; locations[j].lon = lon[j]; locations[j].title = title[j]; }

But I get an object like this Object { 0={...}, 1={...}, 2={...}, more...} when I need one like [Object { lat=45.4654, lon=9.1866, title="Milan, Italy", more...}, Object { lat=47.36854, lon=8.5391, title="Zurich, Switzerland", more...}, Object { lat=48.892, lon=2.359, title="Paris, France", more...}, Object { lat=48.13654, lon=11.57706, title="Munich, Germany", more...}]

Sorry if I don't use technical terminology but I don't really know a lot of javascript and I'm just learning it day by day. I hope someone can help.

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3 Answers 3

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11

Assuming all your lat[], lon[] and title[] arrays have all the same size, you could try to define the locations variable as an 0-based integer index array ([]), rather than a javascript object ({}):

var locations = []; for (var i = 0; i < lat.length; i++) { locations.push({ lat: lat[i], lon: lon[i], title: title[i] }); }

Of course you should check that all your 3 arrays have the same size, just to be sure, you know:

var length = lat.length; if (lon.length !== length || title.length !== length) { alert('Sorry, but the operation you are trying to achieve is not well defined'); }
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Thank you so much!! I've just learned another thing, really appreciate your help
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You've made locations an object instead of an array. You need [], not {}.

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I believe to have had the same problem, so here is my solution.

the problem: need to push array into javascript object.

the code:

function arrForm() { // initialize empty array let amsRes = [] // push objects into it amsRes.push({ "f1": "r1", "f2": "r2" }) // solution: create a object, by populating it with the array let poo = { amsRes } // log to make sure console.log(poo); } arrForm()

hope it helps you out, especially if you have to follow an specific method to return the data.

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