What are some advanced uses of map and filter in JavaScript?

What are some advanced uses of map and filter in JavaScript?

You can use map and filter for complex data transformations, like chaining them to process arrays efficiently.

Can you give me an example of chaining map and filter?

Sure! You can first filter an array to get only even numbers, then use map to square those numbers.

That sounds useful! Can you show me the code for that?

Absolutely! Here's a quick example: const result = array.filter(num => num % 2 === 0).map(num => num ** 2);.

What if I want to use reduce instead of map?

You can use reduce to accumulate values. For instance, you could sum the squares of even numbers using: array.filter(num => num % 2 === 0).reduce((acc, num) => acc + num ** 2, 0);.