Javascript - convert array of arrays into array of objects with prefilled values

Question

I have following array:

[
    [val1, val2]
    [val1, val2]
    [val1, val2]
    [valN, valN]
]

N represents the fact that the

Answer 1

You can simply use Array.prototype.map to project an array into another one by applying a projection function:

var arrs = [
    [1, 2],
    [3, 4],
    [5, 6],
    [7, 8]
];

var objs = arrs.map(function(x) { 
  return { 
    lat: x[0], 
    lng: x[1] 
  }; 
});
console.log(objs);

Answer 2

Using ES6 you can write this in a very concise way:

var arrs = [
    [1, 2],
    [3, 4],
    [5, 6],
    [7, 8]
];
const locations = arrs.map(([lat, lng]) => ({lat, lng}));
console.log(locations);

Answer 3

var array = [
    ['val1', 'val2'],
    ['val1', 'val2'],
    ['val1', 'val2'],
    ['valN', 'valN']
];

var arrayObject = array.map(function(item){ 
  return { lat: item[0], lng: item[1]};
});

console.log(arrayObject);

Answer 4

You can use Array#map to achieve this. Array#map passes each array element through a projection function and returns the values in a new array.

var data= [
    ['val1', 'val2'],
    ['val1', 'val2'],
    ['val1', 'val2'],
    ['valN', 'valN'],
];

var result = data.map(function(row) {
  return {
    lat: row[0],
    lng: row[1]
  };
});

console.log(result);