How to combine an array of unique objects into a single object? [duplicate]

Question

I have an array that looks like this:

const myArray = [
  { 'John': 50 },
  { 'Adam': 29 },
  { 'Jack': 40 }
]

How do I convert the array into an object that looks like this?

const convertedObject = {
  'John': 50,
  'Adam': 29,
  'Jack': 40
}

Start with an empty object and use Object.assign on it several times. — Ry-
– Ry- ♦, Commented Jul 24, 2018 at 7:21

Ori Drori · Accepted Answer · 2018-07-24 07:36:02Z

2

You can spread the array into Object.assign():

const myArray = [
  { 'John': 50 },
  { 'Adam': 29 },
  { 'Jack': 40 }
]

const convertedObject = Object.assign({}, ...myArray)

console.log(convertedObject)

answered Jul 24, 2018 at 7:36

Ori Drori

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1 Comment

Ry- Over a year ago

Note that this leads to a stack overflow on arrays that are large enough.

Ankit Agarwal · Accepted Answer · 2018-07-24 07:20:07Z

1

You can use Array.reduce() for that:

const myArray = [
    {'John':50},
    {'Adam':29},
    {'Jack':40}
]
var res = myArray.reduce((acc, item) => {
  var key = Object.keys(item)[0];
  acc[key] = item[key];
  return acc;
}, {});
console.log(res);

answered Jul 24, 2018 at 7:20

Ankit Agarwal

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