What are some alternative ways to merge arrays in JavaScript?

What are some alternative ways to merge arrays in JavaScript?

You can merge arrays in JavaScript using several methods, such as the concat() method, the spread operator, and the Array.prototype.push() method.

Can you explain how to use the spread operator to merge arrays?

Sure! You can use the spread operator by placing three dots before the arrays you want to merge. For example: const merged = [...array1, ...array2];.

What about using the concat() method?

The concat() method creates a new array by combining two or more arrays. For example: const merged = array1.concat(array2);.

Are there any performance differences between these methods?

Yes, performance can vary. The spread operator is generally more concise, while concat() may be slightly slower for large arrays due to creating a new array.