domachine/generator_example.js

## generator_example.js
function *myGenerator() {
  const a = yield 2;
  return a;
}

const it = myGenerator();
it.next();  // => { value: 2, done: false }
it.next('hello')  // => { value: 'hello', done: true }
	function *myGenerator() {
	const a = yield 2;
	return a;
	}

	const it = myGenerator();
	it.next(); // => { value: 2, done: false }
	it.next('hello') // => { value: 'hello', done: true }