Converting an array of single object arrays, to an array of objects

Question

I currently have an array of arrays that looks like the following:

const writeable = [
  [{id: 1, name: "item1", write: true}],
  [{id: 3, name: "item3", write: true}]
]

I would like to convert the array of arrays (all of which contain a single object) to an array of objects.

I have tried mapping through the writeable array and pushing each item into a new array, but because .map returns a new array, I'm left with the same result. Is there a way to do this, or is this not possible?

The expected output:

const newArray = [
  {id: 1, name: "item1", write: true},
  {id: 3, name: "item3", write: true}
]

You'd need to use .flatMap instead of .map. Or just writeable.flat() :-) — Bergi
– Bergi, Commented Aug 10, 2020 at 17:03

Unmitigated · Accepted Answer · 2020-08-10 17:07:16Z

4

Just use Array#flat.

const writeable = [
  [{id: 1, name: "item1", write: true}],
  [{id: 3, name: "item3", write: true}]
]
const res = writeable.flat();//default depth is 1
console.log(res);

answered Aug 10, 2020 at 17:07

Unmitigated

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Comments

pmaroco · Accepted Answer · 2020-08-10 17:06:26Z

3

You need to return the object inside the element you are iterating

writeable.map(function (item) {
  return item[0];
});

answered Aug 10, 2020 at 17:06

pmaroco

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Comments

Sascha A. · Accepted Answer · 2020-08-10 17:07:23Z

1

const writeable =[
[{id: 1, name: "item1", write: true}],
[{id: 3, name: "item3", write: true}]
];

let result = writeable.flat();

console.log(result);

edited Aug 10, 2020 at 17:07

answered Aug 10, 2020 at 17:06

Sascha A.

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2 Comments

EugenSunic Over a year ago

overkill, just use .flat()

Sascha A. Over a year ago

yes you are right. I thought too complicated. Editted it.

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