When should I use the map function in JavaScript?

When should I use the map function in JavaScript?

You should use the map function when you want to transform each element in an array and create a new array with the results.

Can you give me an example of using map?

Sure! If you have an array of numbers and want to double each number, you can use map like this: const doubled = numbers.map(num => num * 2);.

What if I just want to filter the array instead?

In that case, you should use the filter function. Map is for transforming elements, while filter is for selecting elements based on a condition.

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 and concise.