What is the map function in JavaScript?

Can you explain what the map function does in JavaScript?

Sure! The map function creates a new array by applying a provided function to each element of the original array.

Can you give me an example of how to use the map function?

Of course! Here's a simple example:

const numbers = [1, 2, 3, 4];
const doubled = numbers.map(num => num * 2);
console.log(doubled); // Output: [2, 4, 6, 8]

What happens if the original array is empty?

If the original array is empty, the map function will return an empty array as well.

Are there any performance considerations when using map?

Yes, using map can be less performant than a for loop for very large arrays, but it's often more readable.