test922d.js

function * gen() {
	console.log('start');
	yield "called";
}
var g = gen();
//nothing happened
var a = g.next();
//顯示start
console.log(a.value);
//顯示called
console.log(a.done);
//顯示false
var b = g.next();
console.log(b.done);
//顯示true
g.next();
//在node.js環境中會拋出 Error: Generator has already finished