JS - Filtering nested array

Question

is in JS any way to filter nested array values?

The desired result is to filter null values in nested array.

I tried the code below, but it is not correct.

const test = [
  [
    null,
    {
        "start_time": "2022-08-25T08:45:00.000Z",
        "end_time": "2022-08-25T09:45:00.000Z"
    },
    null,
    null,
    null,
    null,
    {
        "start_time": "2022-08-25T10:00:00.000Z",
        "end_time": "2022-08-25T11:00:00.000Z"
    },
  ]
]

let arr = test.filter(item => {
  return item != null;
})

console.log(arr);

What is your desired result?

PeterKA
– PeterKA

2022-08-24 23:11:08 +00:00
Commented Aug 24, 2022 at 23:11 — PeterKA
– PeterKA, Commented Aug 24, 2022 at 23:11

PeterKA · Accepted Answer · 2022-08-24 23:13:31Z

1

You can use Array#map before Array#filter as follows:

const test = [
  [
    null,
    {
        "start_time": "2022-08-25T08:45:00.000Z",
        "end_time": "2022-08-25T09:45:00.000Z"
    },
    null,
    null,
    null,
    null,
    {
        "start_time": "2022-08-25T10:00:00.000Z",
        "end_time": "2022-08-25T11:00:00.000Z"
    },
  ]
]

const arr = test.map(
    items => items.filter(item => {
      return item !== null;
    })
);

console.log(arr);

answered Aug 24, 2022 at 23:13

PeterKA

24.7k5 gold badges28 silver badges52 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

A1exandr Belan · Accepted Answer · 2022-08-25 05:23:46Z

0

Of course, you can reduce the amount of code

const test = [[null,{"start_time": "2022-08-25T08:45:00.000Z","end_time": "2022-08-25T09:45:00.000Z"},null,null,null,null,{"start_time": "2022-08-25T10:00:00.000Z","end_time": "2022-08-25T11:00:00.000Z"}]];

const arr = test.map(e => e.filter(Boolean));

console.log(arr);

.as-console-wrapper { max-height: 100% !important; top: 0 }

answered Aug 25, 2022 at 5:23

A1exandr Belan

4,7803 gold badges30 silver badges53 bronze badges

Collectives™ on Stack Overflow

JS - Filtering nested array

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related