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博客园 - idior

每日代码 - 6/29 读写分离 每日代码 - 6/28 代码逻辑分组 每日代码 - 6/26 lambda表达式 每日代码 - 6/27 避免创建非法对象 Resume Covariance and Contravariance How does ElementName Binding work? Weird behavior of DataContext Inheritance How does ElementName Binding work – Part 3 InheritanceContext How does ElementName Binding work – Part 2 BindingExpression Logical Tree & Visual Tree Memory leak caused by EventHandle - weak event Resources on Debugging/Tracing WPF How does ElementName Binding work? - Part 1 Logical Tree & NameScope Inside WCF Runtime 有谁准备参加10月份的MVP聚会? MVP聚会 Practical .NET2 and C#2 翻译样章 Be evil or not?
每日代码 - 7/1 减小方法参数的依赖
idior · 2013-07-01 · via 博客园 - idior
 public List<ItemDetail> queryItemDetails(List<Cart> carts){
    ItemRepository itemRepository=...; 
        List<ItemDetail> result = List.newArrayList();
        
 
        List<SkuId> ids = buildItemSkuIds(carts);
        result = itemReposioty.query(itemSkuIds);

//Do some additional things to the result...

return result; }

无意义地的扩大方法的依赖。在本例中, queryItemDetail中其实仅仅用到了carts的中的id属性,却需要调用者传入整个carts列表,无谓地使得该方法所依赖的参数扩大了。同样List<T>这个参数类型也没有太大意义,Iterable<T>很可能就足够了。