fizzbuzz.js

/**
 * Check whether a number is a multiple of a second
 *
 * @param {number} num the number to check
 * @param {number} divisor the number over which it's dividable
 */
const isDivisible = (num, divisor) => num % divisor === 0;

/**
 * Get the value (fizz, buzz, fizzbuzz, {number}) for a specific number
 *
 * @param {number} i number to compute
 */
const fizzOrBuzz = i => {
  if (isDivisible(i, 3) && isDivisible(i, 5)) return 'fizzbuzz';
  if (isDivisible(i, 3)) return 'fizz';
  if (isDivisible(i, 5)) return 'buzz';
  return i;
};

/**
 * Make an array with the numbers [begin, ..., end]
 *
 * @param begin where the range should start (inclusive)
 * @param begin where the range should end (inclusive)
 */
const range = (begin, end) => new Array(end).fill().map((_, i) => i + begin);

/**
 * Get a list of fizzes, buzzes and fizzbuzzes
 * @param {number} length The amount of fizzes to buzz
 */
const fizzbuzz = length => range(0, length).map(i => fizzOrBuzz(i));

// eslint-disable-next-line no-console
const printArray = arr => console.log(arr.join('\n'));

printArray(fizzbuzz(16));