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                            # 集合
* 一種**無序**且**唯一**的數據結構
* es6中 Set
* 集合常用的操作：去重、判斷某元素是否在集合中、求交集等。

https://leetcode-cn.com/problems/intersection-of-two-arrays/
![](https://img.kancloud.cn/c6/2b/c62b8efd637635046e992a9a61c79054_925x509.png)
![](https://img.kancloud.cn/54/72/54729195d822185021fa7748ddcdaa44_745x298.png)

![](https://img.kancloud.cn/52/33/5233ca17790bdd8cb9ef14f77db49d50_874x160.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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