How to Use Flatten in Node JS Example?

Aug 08, 2022

Hi Friends,

Today our leading topic is how to use flatten in node js. We will use flat() in node.js. you can understand the concept of add sub-array contact to arry in node js. if you want to see an example of node js concate to array in sub array, then you are in the right place.

There are many ways to use flatten in node js. I will give you two examples using flat() in node js. The flat() method creates a new array with all sub-array elements concatenated recursively up to the specified depth.

let's see below a simple example with output:

Install Node JS

This step is not required; however, if you have not created the node js app, then you may go ahead and execute the below command:

mkdir my-app
cd my-app

 
npm init

Example: 1

index.js

//create array list
myArr = [0, 1, 2, [3, 4]];
console.log(myArr.flat());

Output:

[ 0, 1, 2, 3, 4 ]

Example: 2

index.js

//create array list
myArr = [0, 1, 2, [[[3, 4]]]];
console.log(myArr.flat(2));

Output:

[ 0, 1, 2, [ 3, 4 ] ]