array-reduce

Question 1

What does Array.reduce do?

Answer 1

Walks through an array and reduces it into a single value. Number or string

Question 2

What action should the callback function perform?

Answer 2

Examine the element, d computation on it and add it to the accumulated value. Updates the accumulated value depenedin on the current value

Question 3

What should the callback function return?

Answer 3

returns the accumulated value

Question 4

What is Array.reduce useful for?