Memo for Javascript

memo.js

const memo = () => {
	const cache = {};
	
	return function() {
		const key = Object.values(arguments).join('_');

		if (key in cache) { 
      return cache[key];
    };
		
		const result = fn.apply(this, arguments);
		
		cache[key] = result;
		
		return result;
	}
};

module.exports = memo;