M3-JavaScript

Question 1

What is Array.prototype.filter useful for?

Answer 1

It creates a new array with the elements that pass the provided function.

Question 2

What is a higher-order function?

Answer 2

A higher-order function is a function that takes a function as an argument or returns a function

Question 3

What is Array.prototype.map useful for?

Answer 3

It creates a new array populated with the results of calling a provided function on every element in the calling array.

Question 4

What is Array.prototype.reduce useful for?

Answer 4

The reduce() is to return the sum of all the elements in an array.