factorial with Memoization

factorialWithMemoization.js

const factorialRecursiveWithMemoization = (n) => {
  const multiplyer = (ender) => {
    if(ender == 1){
      return ender;
    }else{
      return (ender * multiplyer(ender - 1))
    }
  }

  return multiplyer(n);
}


const factorialRecursiveMemoization = factorialRecursiveWithMemoization(1);
console.log(`What is factorialRecursiveMemoization ${factorialRecursiveMemoization}`);

const factorialWithRecursive = (n) => {
  if(n == 0){
    return n;
  }else{
    return (n * factorialWithRecursive(n - 1));
  }
}

const memoize = (cb) => {
  let cache = {};
	return (n, ...args) => { //[9]
		if (n in cache) {
			console.log('Fetching from cache:', n);
			return cache[n];
		}
		else {
			console.log('Calculating result');
			let result = cb(n); // cb(9)
			cache[n] = result;
			return result;
		}
	};
};

const factorialRecursiveMemoization = memoize(factorialWithRecursive);
console.log(`What is factorialRecursiveMemoization ${factorialRecursiveMemoization(5)}`);