How to Remove Null from an Array in Lodash ?

Removing null values from Array is important because it improves data cleanliness and ensures accurate processing.

Below are the approaches to Remove null from an Array in Lodash:

Run the below command to install Lodash:

npm i lodash

Using compact Function

In this approach, we are using the compact function from Lodash to remove null values from the array arr, resulting in a new array res containing only non-null elements.

Example: The below example uses a compact function to Remove null from an Array in Lodash.

const _ = require('lodash');
let arr = [1, null, 3, null, 5];
let res = _.compact(arr);
console.log(res);

Output:

[ 1, 3, 5 ]

Using filter Function

In this approach, we are using the filter function from Lodash with a predicate that filters out null values, creating a new array res with elements that are not null from the array arr.

Example: The below example uses a filter function to Remove null from an Array in Lodash.

const _ = require('lodash');
let arr = [null, 2, null, 4, null];
let res = _.filter(arr, item => item !== null);
console.log(res);

Output:

[ 2, 4 ]

Using reject Function

In this approach, we are using the reject function from Lodash with the _.isNull predicate to exclude null values from the array arr, resulting in a new array res containing only non-null elements.

Example: The below example uses a reject function to Remove null from an Array in Lodash.

const _ = require('lodash');
let arr = [null, null, 3, null, 5];
let res = _.reject(arr, _.isNull);
console.log(res);

Output:

[ 3, 5 ]