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                            這一章主要介紹異步編程，其中最常見的異步編程問題介紹，也有詳細的解決方案。在這一章中我們可以接觸到Promise、事件、高階函數是如何進行流程控制的。 （這一章建議多看書）[腦圖](http://naotu.baidu.com/viewshare.html?shareId=au9i54fq5q80)?

![Node異步I/O](https://box.kancloud.cn/2015-07-15_55a634e2a6ef7.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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