Short Answer
Yes, arrays in JavaScript can be extended with other arrays without creating new arrays.
How can we extend arrays with other arrays without creating new arrays in javascript
Using the push function with spread (…) operator we can extend arrays in javascript. The code snippet for specific task is
arr2.push(...arr1);let’s see the complete code
const arr1 = [6,3,"javascript"];
const arr2 = [4,3];
arr2.push(...arr1);
console.log(arr2);The output of the program is
[4,3,6,3,"javascript"]Explanation of the above code
First, let’s create two arrays and name them arr1 and arr2.
In line number 4 the spread operator expands the arr1 so the equivalent code will look like this
const arr1 = [6,3,"javascript"];
const arr2 = [4,3];
arr2.push(6,3,"javascript");
console.log(arr2);Then it pushed all the elements at the end of the arr2. The elements will be pushed in the order as it is placed inside the push function.
