JavaScript removes objects from list based on an array of key values

Question

I'm trying to remove objects from an array based on their keys by passing in an array of keys.

For example, I have an array of objects called "clients":

[
  { id: 1, name: Tim },
  { id: 2, name: Bob },
  { id: 3, name: Joe },
]

Then I have another array with the keys called "ids":

[1,3]

After I filter it, I should be left with just:

[
  { id: 2, name: Bob },
]

So far I've tried this, but it returns everything:

filteredClients = clients.filter(n.id => !ids.includes(n.id)

looks like it should work. But you need to only pass n in your lambda: filteredClients = clients.filter(n => !ids.includes(n.id) — Davin Tryon
– Davin Tryon, Commented Mar 24, 2020 at 16:03

vicpermir · Accepted Answer · 2020-03-24 16:08:08Z

1

Use n in your callback instead of n.id. In this case n will take the value of each object of the clients array on each iteration. More info here.

const clients = [
     {id:1,name:"Tim"},
     {id:2,name:"Bob"},
     {id:3,name:"Joe"}
];

const ids = [1, 3];

var filteredClients = clients.filter(n => !ids.includes(n.id));

console.log(filteredClients);

edited Mar 24, 2020 at 16:08

answered Mar 24, 2020 at 16:05

vicpermir

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Comments

Ram Sankhavaram · Accepted Answer · 2020-03-24 16:09:49Z

0

let arr = [
     {id:1,name:'Tim'},
     {id:2,name:'Bob'},
     {id:3,name:'Joe'},
]
let con = [1,3]


let updatedArr = arr.find((x)=> !con.includes(x.id));
console.log(updatedArr);

We can use .find along with includes function of array to filter out the unwanted objects from your array

answered Mar 24, 2020 at 16:09

Ram Sankhavaram

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Comments

matthias_h · Accepted Answer · 2020-03-24 17:48:27Z

0

Initial line of code:

filteredClients = clients.filter(n.id => !ids.includes(n.id)

The updated line of code should be:

filteredClients = clients.filter(n => !ids.includes(n.id))

Here instead of using n.id use n for callback in your lambda function. As in ES6 value of each object is taken by n in each iteration of given clients array

For more info here

edited Mar 24, 2020 at 17:48

matthias_h

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answered Mar 24, 2020 at 17:42

saurav

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