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                            # 數組去重
```javascript
    // 把數組中重復的元素去掉
var arr = [1,2,1,2,3,3,3,4,5,5];
function getArray(arr){
    var newArr = [];
    for(var i=0;i<arr.length;i++){
        // 做判斷 判斷NewArr中沒有的元素
         if(newArr.indexOf(arr[i]) == -1){//在newArr中判斷是否有arr中的元素（indexof，存在返回索引，不存在返回-1）  判斷
             newArr.push(arr[i]);//把滿足判斷添加的元素在后面追加
         }        
} 
return newArr;
}
console.log(getArray(arr));
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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