fizzBuzz.ts

function fizzBuzz(n: number) {
    return (
        { true: '', false: 'Fizz' }[`${n % 3 === 0}`] +
        { true: '', false: 'Buzz' }[`${n % 5 === 0}`] ||
        n.toString()
    )
}

function fizzBuzzFunctional(n: number) {
    let test =
        (d: number, s: 'Fizz' | 'Buzz', x: Function) =>
            n % d === 0
                ? () => s + x('')
                : x

    let fizz = (x: Function) => test(3, 'Fizz', x)
    let buzz = (x: Function) => test(5, 'Buzz', x)

    return fizz( buzz(x => x) )( n.toString() )
}