Extensible Fizbuzz, based on monoids

fizbuzz.js

var printers = {
    3: "Fizz",
	5: "Buzz",
	7: "Baz"
}

function forNumber(n) {
	var print = '';
	for var printer in printers {
		if (n % printer.Key === 0) print += printer.Value;
	}
	print = (print === '') ? print : n;
	return print;
}