How to get 1 to n key value in an array of objects and push them to a new array?(Javascript)

Question

I have an array of objects,

[
 {trial1: 'a1', trial2: 'a2', trial3: 'a3'},
 {trial1: 'b1', trial2: 'b2', trial3: 'b3'},
 {trial1: 'c1', trial2: 'c2', trial3: 'c3'},
 ]

How do I get an array of arrays like this

[
 ['a1','a2','a3'],
 ['b1','b2','b3'],
 ['c1','c2','c3']
]

And also an array like this

[
 ['a1','b1','c1'],
 ['a2','b2','c2'],
 ['a3','b3','c3']
]

trincot · Answer 1 · 2021-12-15T06:58:11.780

2

Use .map(Object.values):

let data = [
 {trial1: 'a1', trial2: 'a2', trial3: 'a3'},
 {trial1: 'b1', trial2: 'b2', trial3: 'b3'},
 {trial1: 'c1', trial2: 'c2', trial3: 'c3'},
];

let result = data.map(Object.values);

console.log(result);

When you need to transpose:

let data = [
 {trial1: 'a1', trial2: 'a2', trial3: 'a3'},
 {trial1: 'b1', trial2: 'b2', trial3: 'b3'},
 {trial1: 'c1', trial2: 'c2', trial3: 'c3'},
];

let result = data.map(Object.values);
result = result[0].map((_, i) => result.map(row => row[i]));

console.log(result);

edited Dec 15 '21 at 06:58

answered Dec 15 '21 at 06:47

trincot

317,000
35
244
286

Thank you so much. – Nvv Dec 15 '21 at 06:51
How do i transpose this array – Nvv Dec 15 '21 at 06:54
1

See [Transposing a 2D-array](https://stackoverflow.com/questions/17428587/transposing-a-2d-array-in-javascript). Also added to my answer. – trincot Dec 15 '21 at 06:56

Saeed Shamloo · Answer 2 · 2021-12-15T07:03:00.443

1

You can do it by using map and Object.values like this:

const data = [
 {trial1: 'a1', trial2: 'a2', trial3: 'a3'},
 {trial1: 'b1', trial2: 'b2', trial3: 'b3'},
 {trial1: 'c1', trial2: 'c2', trial3: 'c3'},
 ];
const values = data.map(Object.values).map((item,i,self) => self.map(o => o[i]) );
console.log(values)

edited Dec 15 '21 at 07:03

answered Dec 15 '21 at 06:47

Saeed Shamloo

6,199
1
7
18

Thank you so much. How do i transpose this array? – Nvv Dec 15 '21 at 06:54
1

You're welcome, I edited my answer to transpose it. – Saeed Shamloo Dec 15 '21 at 07:03

How to get 1 to n key value in an array of objects and push them to a new array?(Javascript)

2 Answers2