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                            ## 什么是閉包
解決函數的中狀態問題。
閉包可以理解成“定義在一個函數內部的函數“。在本質上，閉包是將函數內部和函數外部連接起來的橋梁。
## 閉包產生的歷史

## 解決什么問題

## 案例
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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