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                            [TOC]

## 概述
1. 是一個關聯容器
2. 它對最近使用過的項提供最快速的訪問,并會根據幾個開銷函數的結果自動移除那些不常用的項。
3. QMap或者QHash相比，好處是QCache自動獲得被插入對象的所有權
4. 并在需要的時候自動釋放他們來為新插入的對象騰出空間


實例

```
QCache<int, Employee> cache;
// QCache<int, Employee> cache(5000);

  Employee *employee = new Employee;
  employee->setId(37);
  employee->setName("Richard Schmit");
  ...
  cache.insert(employee->id(), employee);
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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