Make an array of objects from one object

Question

I am a bit lost in my functional programming game.

I have an object like this:

const answers = {1: 'first', 2:'second', 3:'third', 4:'fourth'}

I would like to reshape the object into an array of objects like this.

const arrayOfAnswers = [{1:'first'}, {2:'second'}, {3:'third'}, {4:'fourth'}]

What would be an easy solution to reach this?

`const answers = {1: first 2:second: 3:third 4:fourth}` is wrong. — Praveen Kumar Purushothaman, May 15 '18 at 08:42
@PraveenKumar maybe. It's also likely we're just missing the defined variables. — evolutionxbox, May 15 '18 at 08:44
Hint: Use something like `Object.keys` and map over the array. — evolutionxbox, May 15 '18 at 08:44
@PraveenKumar ok. The OP edited it before I opened the question. — evolutionxbox, May 15 '18 at 08:49
probably already answered: https://stackoverflow.com/questions/40259082/how-i-can-can-map-an-large-object-to-an-array-in-es6 — Alejandro, May 15 '18 at 08:53

score 6 · Answer 1 · answered May 15 '18 at 08:46

6

You could map with a destruction for key/value.

var answers = { 1: 'first', 2: 'second', 3: 'third', 4: 'fourth' },
    array = Object.entries(answers).map(([k, v]) => ({ [k]: v }));
    
console.log(array);

answered May 15 '18 at 08:46

Nina Scholz

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It's a great answer but the result type (asked by OP) is so strange that it begs the question how one would use such data... – Mulan May 15 '18 at 16:19

score 1 · Answer 2 · answered May 15 '18 at 08:44

1

Assuming you meant

answers = {1: "first", 2:"second" , 3:"third", 4:"fourth"};

Use Object.entries and map

var output = Object.entries(answers).map( s => ({[s[0]]: s[1]}) )

answered May 15 '18 at 08:44

gurvinder372

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score 0 · Answer 3 · answered May 15 '18 at 08:46

You can do it using iterating the object's keys. I'll give an ES5 solution, assuming:

Others would be giving ES6 solution.
You assumed answers = {1: "first", 2: "second" , 3: "third", 4: "fourth"}

var answers = {
  1: "first",
  2: "second",
  3: "third",
  4: "fourth"
};
var finalAnswers = [];
var ansKeys = Object.keys(answers);
for (var i = 0; i < ansKeys.length; i++) {
  obj = {};
  obj[ansKeys[i]] = answers[ansKeys[i]];
  finalAnswers.push(obj);
}
console.log(finalAnswers);

score 0 · Accepted Answer · answered May 15 '18 at 08:51

0

You can also use Array.prototype.reduce method.

const answers = {1: 'first', 2:'second', 3:'third', 4:'fourth'};

console.log(Object.entries(answers).reduce((acc, v) => acc.concat({[v[0]]: v[1]}), []));

answered May 15 '18 at 08:51

Matus Dubrava

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Make an array of objects from one object

4 Answers4