継続渡しスタイル(loopは大目にみて...

fizzbuzz_cps.js

function fizz(n, cont) {
  if (n % 3 == 0) {
    cont("Fizz");
  } else {
    cont();
  }
}

function buzz(n, cont) {
  if (n % 5 == 0) {
    cont("Buzz");
  } else {
    cont();
  }
}

function fizzbuzz(n, cont) {
  fizz(n, (fizz) => buzz(n, (buzz) => fizz && buzz ? cont(fizz + buzz) : cont(fizz || buzz || n)));
}

function loop(b, e, f) {
  if (b <= e) {
    f(b);
    loop(b + 1, e, f);
  }
}

loop(1, 100, (n) => fizzbuzz(n, (ret) => console.log(ret)));