当使用IComparable的＆LT; T＆GT;比。的IComparer＆LT; T＆GT; [英] When to use IComparable<T> Vs. IComparer<T>

问题描述

我试图找出这些接口，我需要实现的。他们都基本上做同样的事情。我什么时候会用一个比其他？

解决方案

那么，他们都没有的非常的同样的事情，的IComparer＆LT; T＆GT; T＆GT; 的是，其能够将自己与相同类型的其他实例比较类型实施<上的类型，其能够比较两个不同的物体，同时 IComparable的＆所述实施/ P>

我倾向于使用 IComparable的＆LT; T＆GT; 的时候，我需要知道如何另一个实例涉及到这实例。 的IComparer＆LT; T＆GT; 是分类收集有用的的IComparer＆LT; T＆GT; 表示比较之外

I'm trying to figure out which of these interfaces I need to implement. They both essentially do the same thing. When would I use one over the other?

解决方案

Well they are not quite the same thing as IComparer<T> is implemented on a type that is capable of comparing two different objects while IComparable<T> is implemented on types that are able to compare themselves with other instances of the same type.

I tend to use IComparable<T> for times when I need to know how another instance relates to this instance. IComparer<T> is useful for sorting collections as the IComparer<T> stands outside of the comparison.

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