JS callback hell

需要对js的promise、generator等有一定了解。
在此放上需要读的内容

Callback Hell
Bluebird
Bluebird – Promises in NodeJS
Managing Node.js Callback Hell with Promises, Generators and Other Approaches
The Great Escape from Callback Hell* Callback Hell

• Bluebird
• Bluebird – Promises in NodeJS
• Managing Node.js Callback Hell with Promises, Generators and Other Approaches
• The Great Escape from Callback Hell