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How to use push() Method In Javascript

Method 2: Using concat() Method

We create the N arrays and then concatenate the array by using the push() method. In this, we also use the spread operator(…) which iterates over each of the values.

Javascript 
const arr1 = [11, 12, 13];
const arr2 = [14, 15, 16];
arr1.push(...arr2);
console.log(arr1);

Output
[ 11, 12, 13, 14, 15, 16 ]

What is the most efficient way to concatenate N arrays in JavaScript ?

In this article, we will see how to concatenate N arrays in JavaScript. The efficient way to concatenate N arrays can depend on the number of arrays and the size of arrays.

To concatenate N arrays, we use the following methods:

Table of Content

  • Using push() Method
  • Using concat() Method
  • Using Spread Operator
  • Using Array.from with Mapping Function:

Similar Reads

Method 1: Using push() Method

We create the N arrays and then concatenate the array by using the push() method. In this, we also use the spread operator(…) which iterates over each of the values....

Method 2: Using concat() Method

First, we will create N arrays and then apply the concat() method to concatenate N arrays. The concat() method is used to merge N arrays together. This method does not alter the original arrays and returns the new Array....

Method 3: Using Spread Operator

You can also use Spread Operator to concatenate N arrays. For this, first, we will create N arrays and then apply Spread Operator to concatenate N arrays....

Method 4: Using Array.from with Mapping Function:

Using Array.from with a mapping function efficiently concatenates arrays. The mapping function combines multiple arrays into a single array by spreading them within Array.from, resulting in a concatenated array with concise syntax and good performance...

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#javascript-array #JavaScript-DSA #JavaScript-Questions #JavaScript #Web Technologies

Method 2: Using concat() Method