异步模式（一）

[zhangyanan0525]

异步模式主要分三部分来分享：

• 回调
• Promise
• 生成器

[zhangyanan0525]

https://villainhr.com/page/2016/08/25/async的generator实现

http://scriptoj.mangojuice.top/problems/72?problemsGroupId=593c151a8bf3445a88fa79be

https://juejin.im/post/5b04c7db6fb9a07aa542a772

https://juejin.im/post/5ca99e8c6fb9a05e786c9e19

https://segmentfault.com/a/1190000006720137

https://sinaad.github.io/xfe/2016/07/12/going-async-with-es6-generators/

https://github.com/YvetteLau/Blog/issues/28