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                            這一章主要介紹了前端JavaScript里不能遇到的Buffer。由于Node中會涉及頻繁的網絡和磁盤I/O，處理字節流數據會是很常見的行為，這部分的場景與純粹的前端開發完全不同。

體會過JavaScript友好字符串操作后，有些開發者可能會形成思維定勢，將Buffer當作字符串來理解。但字符串與Buffer之間有實質性的差異，即Buffer是二進制數據，字符串與Buffer之間存在編碼關系。因此，理解Buffer的諸多細節十分必要，對于如何高效處理二進制十分有用。[腦圖](http://naotu.baidu.com/viewshare.html?shareId=au9r8oahp0c0)

![Node理解Buffer](https://box.kancloud.cn/2015-07-15_55a6351c63d70.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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