Description:
Let's build a calculator that can calculate the average for an arbitrary number of arguments.
The test expects you to provide a Calculator object with an average method:
// Foo
Calculator.average()
The test also expects that when you pass no arguments, it returns 0. The arguments are expected to be integers.
It expects Calculator.average(3,4,5) to return 4.
Solution : calculator.js
Source : codewars