C＃ - 索引在其应用意义 [英] C# - Indexer at its meaningful application

问题描述

据我了解 索引使我们能够在类中访问集合仿佛类
本身是一个数组的

I understand indexer enable us to access a collection within a class as though the class itself were an array.

假设我们正在开发一个项目，我们在哪里符合实际之实践的使用这样的索引器（例如可以帮助）？

Suppose we are developing a project ,where do we fit the real pratical usage (example may help) of such indexers ?

推荐答案

看几乎集合类的任何为例框架。如果我是没有索引检索的语言哈希表中的项目，我会用语法如下：

Look to almost any of the collection classes in the framework for an example. If I were to retrieve an item from a hashtable in a language without an indexer, I would use syntax like:

object o = table.getvalue(key);

其中一个索引可以更简单的语法：

where an indexer allows somewhat simpler syntax:

object o = table[key];

（故意忽略打字/上述样品仿制药的问题）

(purposely ignoring typing/generics issues in the samples above)

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