Fizz Buzz

fizzBuzz-01.js

const ifType = type => cb => item => typeof item === type ? cb(item) : item
const ifNumber = ifType('number')

const isDivisibleBy = divisor => num => num % divisor === 0
const isFizz = isDivisibleBy(3)
const isBuzz = isDivisibleBy(5)
const isBang = isDivisibleBy(15)

const convert = predicate => converted => num => predicate(num) ? converted : num
const toFizz = convert(isFizz)('fizz')
const toBuzz = convert(isBuzz)('buzz')
const toBang = convert(isBang)('bang')

const log = item => console.log(item)

const array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]

(
  array
  .map(ifNumber(toBang))
  .map(ifNumber(toBuzz))
  .map(ifNumber(toFizz))
  .forEach(log)
)

fizzBuzz-02.js

const isDivisibleBy = bottom => top => top % bottom === 0

const isFizz = isDivisibleBy(03)
const isBuzz = isDivisibleBy(05)
const isBang = isDivisibleBy(15)

const createArray = ({ from = 0, to = 100, accumulator = [] }) => {
  if (from > to) return accumulator
  return createArray({ from: from + 1, to: to, accumulator: [...accumulator, from] })
}

const result = createArray(1, 100).map(num => {
  if (isBang(num)) return 'BANG'
  if (isBuzz(num)) return 'BUZZ'
  if (isFizz(num)) return 'FIZZ'
  return num
})

console.log(result)