Best way to convert array of objects into Object?

Question

I need to convert the array of objects into object. I've done with the below logic. Is there is a best way to handle this?

Fiddler Version

var before = [{
  "x": ["2015-10-14T01:59:59.999+05:30", "2015-10-14T03:59:59.998+05:30", "2015-10-14T05:59:59.997+05:30", "2015-10-14T07:59:59.996+05:30", "2015-10-14T09:59:59.995+05:30", "2015-10-14T11:59:59.994+05:30", "2015-10-14T13:59:59.993+05:30", "2015-10-14T15:59:59.992+05:30", "2015-10-14T17:59:59.991+05:30", "2015-10-14T19:59:59.990+05:30", "2015-10-14T21:59:59.989+05:30", "2015-10-14T23:59:59.988+05:30"]
}, {
  "CleanCoal": ["0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00"]
}, {
  "Middelings": ["0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00"]
}, {
  "Prime": ["0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00"]
}, {
  "SpiralProd": ["0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00"]
}];

var after = {};

for (var i = 0; i < before.length; i++) {
  var keys = Object.keys(before[i]);

  after[keys] = before[i][keys];
}

console.log(after)
document.writeln(JSON.stringify(after))

Answer 1

You can use forEach to iterate over an array, and you forgot to iterate over the nested array if there are multiple elements inside of an object.

So, the code in question will not work for

var arr = [{'a': 'b', 'c': 'd'}];

Demo

var before = [{
  "x": ["2015-10-14T01:59:59.999+05:30", "2015-10-14T03:59:59.998+05:30", "2015-10-14T05:59:59.997+05:30", "2015-10-14T07:59:59.996+05:30", "2015-10-14T09:59:59.995+05:30", "2015-10-14T11:59:59.994+05:30", "2015-10-14T13:59:59.993+05:30", "2015-10-14T15:59:59.992+05:30", "2015-10-14T17:59:59.991+05:30", "2015-10-14T19:59:59.990+05:30", "2015-10-14T21:59:59.989+05:30", "2015-10-14T23:59:59.988+05:30"]
}, {
  "CleanCoal": ["0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00"]
}, {
  "Middelings": ["0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00"]
}, {
  "Prime": ["0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00"]
}, {
  "SpiralProd": ["0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00", "0.00"]
}];

var after = {};

before.forEach(function(obj) {
  // obj here is the element of the array, i.e. object

  // Looping over all the keys of the object
  Object.keys(obj).forEach(function(key) {
    // key here is the key of the object
    after[key] = obj[key];
  });
});

console.log(after);
document.writeln('<pre>' + JSON.stringify(after, 0, 2) + '</pre>');