How to make the n-th number of arrays from an array of objects by value in the object?

Question

JavaScript

There is an array of objects, for example:

let h = [
                {
                    name: 'Petya',
                    id: 1
                },
                {
                    name: 'Vasya',
                    id: 2
                },
                {
                    name: 'Kolya',
                    id: 3
                },
                {
                    name: 'Sveta',
                    id: 1
                }
            ];

            let h1 = [
                {
                    name: 'Petya',
                    id: 1
                },
                {
                    name: 'Sveta',
                    id: 1
                }
            ];

            let h2 = [
                {
                    name: 'Vasya',
                    id: 2
                }
            ];

            let h3 = [
                {
                    name: 'Kolya',
                    id: 3
                }
            ];

The h array contains everything. I would like to divide into the n-th number of arrays, for example, by id, where unique ids will be collected in each array, and all the elements that are there. Those. as a result, I want to get arrays h1, h2, h3

Answer 1

as a result, I want to get arrays h1, h2, h3

In general, you don't know how many different id's there will be and what their values ​​will be. So you don't just need arrays, they should be folded into an object (or Map):

const grouped = arr.reduce((acc, n) => ((acc[n.id] ??= []).push(n), acc), {});