//Given an array, double each value in the array.

var DoubleValuesInArray = function(someArray) {
    for (var i in someArray) {
        if (typeof someArray[i] == "number") {
           someArray[i] = Math.pow(someArray[i],2);
        }
    }
    return someArray;
};

console.log(DoubleValuesInArray([1,2,3,4]));