How can I filter certain items out of an array of objects using values from a different array in JavaScript?

Question

For example, if I begin with this array in JavaScript:

Array Persons:
[0]: { Name: Henry, Age: 20, Height: 68, Weight: 150}
[1]: { Name: Tom, Age: 34, Height: 69, Weight: 140}
[2]: { Name: Jerry, Age: 45 Height: 63, Weight: 175}

and then I have the array of the fields I want to pull

Array Filter:
[0]: "Name"
[1]: "Weight"

How can I filter the first array using the second to then return only those fields stated in the second array?

Expected return:

Array Persons2:
[0]: { Name: Henry, Weight: 150}
[1]: { Name: Tom, Weight: 140}
[2]: { Name: Jerry, Weight: 175}

Thanks! Please let me know if I can clarify anything.

From the duplicate, see [this answer](https://stackoverflow.com/a/56592365/283366) — Phil, Oct 14 '22 at 00:09

PeterKA · Accepted Answer · 2022-10-14T01:57:21.900

1

You can use Array#map and Array#reduce methods as follows:

const persons = [{ Name: "Henry", Age: 20, Height: 68, Weight: 150},{ Name: "Tom", Age: 34, Height: 69, Weight: 140},{ Name: "Jerry", Age: 45, Height: 63, Weight: 175}],

filter = ["Name","Weight"],

persons2 = persons.map(
  person => filter.reduce(
    (acc, prop) => ({...acc, [prop]: person[prop]}),
  {})
);

console.log( persons2 );

edited Oct 14 '22 at 01:57

answered Oct 14 '22 at 00:27

PeterKA

24,158
5
26
48

1

Thanks! This is what I was trying to get to – Taylor Oct 16 '22 at 16:39

How can I filter certain items out of an array of objects using values from a different array in JavaScript?

1 Answers1