Build a Calculator - Calculating averages

Build a Calculator - Calculating averages

// 1/11/2016

Basic JS - Calculating averages

// 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:

// 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.

var Calculator = {
    average : function () {
        var arr = Array.prototype.slice.call(arguments)
        if (arr.length===0) return 0
        else return arr.reduce(function(a,b){return a+b},0) / arr.length
    }    
}

Calculator.average(3,4,5,6,7)