**generators(生成器)**

generators(生成器)

生成迭代器：

	function* get(){
		let a = 1;
		a++;
		console.log(a);
		yield 'abc';
				
		let y = 2+a;
		console.log(y);
		yield 'hellow';
		console.log('dapang');
		yield '师徒教育';
		yield '欢迎你';
		yield '师徒课堂';
		console.log(123);
		yield '站在前方，为你导航';
	}
	let iter = get();
	console.log(iter.next());
	console.log(iter.next());
	console.log(iter.next());
	console.log(iter.next());
	console.log(iter.next());
	console.log(iter.next());
	console.log(iter.next());
	//依次打印：2
		Object {value: "abc", done: false}
		4
		Object {value: "hellow", done: false}
		dapang
		Object {value: "师徒教育", done: false}
		Object {value: "欢迎你", done: false}
		Object {value: "师徒课堂", done: false}
		123
		Object {value: "站在前方，为你导航", done: false}
		Object {value: undefined, done: true}
注释:1.生成器用来生成迭代器;
     2.function函数名字中间有一个*号.

def fib(max):
a, b = 0, 1
while a < max:
yield a
a, b = b, a + b
>>> for i in fib(1000):
print(i)
0
1
1
2
3
5
8
13
21
34
55
89
144
233
377
610
987
>>>f = fib(1000)
>>>f.next() #python 3.0 要写成f.next() 否则出错
0
>>>f.next()
1
>>>f.next()
1
>>>f.next()
2