What are the differences between map and filter in programming?

Can you explain the differences between map and filter in programming?

Sure! Both map and filter are higher-order functions used in programming, particularly in functional programming. Map transforms each element in a collection, while filter selects elements based on a condition.

Can you give me an example of how to use both in JavaScript?

Absolutely! For map, you might use it like this: const doubled = numbers.map(num => num * 2); For filter, it would look like: const evens = numbers.filter(num => num % 2 === 0);

Are there any performance differences between them?

Yes, performance can vary. Map processes every element, while filter only processes elements that meet the condition, which can be more efficient in some cases.

When should I use map over filter?

Use map when you want to transform data and filter when you want to reduce the dataset based on specific criteria.