Arrays

Question 1

What is Array.prototype.filter useful for?

Answer 1

• filtering out an array/creating a new array while excluding some elements

Question 2

What is Array.prototype.map useful for?

Answer 2

• returns an array of values where the callback function is called on each element

Question 3

What is Array.prototype.reduce useful for?

Answer 3

• when you want to combine all elements of an array into a single value