Array- Filter

Question 1

What does Array.filter do?

Answer 1

creates a shallow copy of a portion of a given array, filtered down to just the elements from the given array that pass the test implemented by the provided function.

Question 2

What should the callback function return?

Answer 2

It should return a truthy to keep the element in the resulting array, and a falsy value otherwise.

Question 3

What is Array.filter useful for?

Answer 3

finding values or pulling values that are wanted out of an array.