How do different JavaScript methods compare in performance?

Can you explain the differences between map, forEach, and filter in JavaScript?

Sure! The map method creates a new array by applying a function to each element, while forEach executes a function on each element without returning a new array. The filter method creates a new array with elements that pass a test defined by a function.

When should I use map instead of forEach?

Use map when you need to transform data and create a new array. Use forEach when you want to perform an action on each element without needing a new array.

Are there performance differences between these methods?

Yes, there can be performance differences. Generally, forEach is faster for simple iterations, while map and filter may be slower due to the creation of new arrays. However, the difference is often negligible for small datasets.

Can you give an example of using filter?

Certainly! Here's an example: const evenNumbers = numbers.filter(num => num % 2 === 0); This will create a new array containing only the even numbers from the numbers array.