Create a array of objects by grouping objects conditionally

January 10, 2023

I am trying to create a new array of objects by comparing two arrays.One array contains the ids to be compared and the other contains the dataset which should be compared with the first array are a new array of object must be created.

Let me explain this in detail

Consider array 1:

['1','2']

Array 2

[{name:'Linus',id:'1'},{name:'Anthony',id:'1'},{name:'Jake',id:'2'},{name:'Eva',id:'2'}]

What I am expecting as a output is:

[
{id:'1',users:[{name:'Linus',id:'1'},{name:'Anthony',id:'1'}]},
{id:'2',users:[{name:'Jake',id:'2'},{name:'Eva',id:'2'}
]

I am not sure what has to be done.

>Solution :

Something like this for example

const ids = ['1','2'];
const users = [{name:Linus,id:'1'},{name:Anthony,id:'1'},{name:Jake,id:'2'},{name:Eva,id:'2'}];

const groups = ids.map(id =>{
    return {
        id,
        users: users.filter(u => u.id === id)
    }
})