Extended example of closures in javascript, adding memoization to the mix

example3.js

function powerOfNFactory(power){
    var counter = 0;
    var cache = {};
    return function generatedFunction(subject){
        counter++;
        console.log(`Dyanmic Power of ${power} called ${counter} time/s`);
        if (cache[subject] === undefined) {
            cache[subject] = Math.pow(subject, power);
        } else {
            console.log("Cached!");
        }
        return cache[subject];
   }
}

var powerOf2 = powerOfNFactory(2);
var powerOf3 = powerOfNFactory(3);

powerOf2(2); // Returns 4,  logs "Dyanmic Power of 2 called 1 time/s"
powerOf2(2); // Returns 4,  logs "Dyanmic Power of 2 called 2 time/s" "Cached!"
powerOf3(3); // Returns 27, logs "Dyanmic Power of 3 called 1 time/s"