hg-pyun/iterator.08.js

## iterator.08.js
function* fibonacci() {
  let [prev, curr] = [1, 1];
  while (true) {
    [prev, curr] = [curr, prev + curr];
    yield curr;
  }
}

for (let n of fibonacci()) {
  console.log(n);

  if (n >= 1000) {
    break;
  }
}
	function* fibonacci() {
	let [prev, curr] = [1, 1];
	while (true) {
	[prev, curr] = [curr, prev + curr];
	yield curr;
	}
	}

	for (let n of fibonacci()) {
	console.log(n);

	if (n >= 1000) {
	break;
	}
	}