hanoi game on generators

hanoi.js

import {filter, head, range} from "ramda";


const TOWERS_COUNT = 3;

// Int -> Int -> Int
let getIntermidiateDest = (from, to) => head(range(0, TOWERS_COUNT).filter(i => i != from & i != to));

// Int -> Int -> Int -> {a}
function *hanoi(n, from, to) {
  if (n==0) return;
  if (from == to) return;

  let via = getIntermidiateDest(from, to);

  yield *hanoi(n-1, from, via);
  yield({from, to});
  yield *hanoi(n-1, via, to);
}


let game = hanoi(4, 0, 2);
for (let step of game) {
  console.log(`move top disk from ${step.from} -> ${step.to}`);
}