backtracking-iterative.js

function * backTracking(...args) {
  const r = [[]];
  while (r.length) {
    const t = r.shift();
    if (t.length === args.length) yield t;
    else r.unshift(...args[t.length].map(i => [...t, i]));
  }
}
const iter = backTracking([true, false], [1, 2, 3], [3, 4, 5, 6, 7], ['a', 'b'], ['c']);
[...iter];