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                            ## 定義和用法

`join()` 方法用于把數組中的所有元素放入一個字符串。

元素是通過指定的分隔符進行分隔的。


## 用法

![mark](http://qiniu.newthink.cc/blog/20171218-153558300.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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