const factors = [[3, 'Fizz'], [5, 'Buzz']] const fizzBuzz = num => factors.map(([factor,text]) => (num % factor)?'':text).join('') || num const range1 = x => [...Array(x+1).keys()].slice(1) const outputs = range1(100).map(fizzBuzz) console.log(outputs.join('\n'))