C# IEqualityComparer nedir Temel Açıklaması

C# IEqualityComparer nedir Temel Açıklaması

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If you do decide you need a comparer, you güç certainly use a generalized comparer (see DMenT's answer), but if you need to reuse that logic you should encapsulate it in a dedicated class. You could even declare it by inheriting from the generic base:

Derive from this class to provide a custom implementation of the IEqualityComparer generic interface for use with collection classes such birli the Dictionary generic class, or with methods such bey List.Sort.

Besides, it allows to use more than one property birli a key, so the next call is absolutely valid and will preserve all actors with the same last name kakım long birli their first names differ:

If there is only one way of testing two instances of T for equality, or if one of several methods is preferred, then IEquatable would be the right choice: This interface is supposed to be implemented only by T itself, so that one instance of T katışıksız internal knowledge of how to compare itself to another instance of T.

ArgumentException özelliği bir değere ayarlanır, fakat kompozit tablosu ve kullanılarak IHashCodeProviderICompareroluşturulmuştur.

Scroll down to the part on KeyEqualityComparer and especially the C# IEqualityComparer nedir part on the importance of GetHashCode. There is a whole discussion on why obj.GetHashCode(); (bey suggested by DMenT's post) is wrong and should just return 0 instead.

I would say that the best use would be C# IEqualityComparer Nasıl Kullanılır when you need to plug in different equality rules for a certain algorithm. Much in the same way that a sorting algorithm might accept C# IEqualityComparer Nasıl Kullanılır an IComparer, a finding algorithm might accept an IEqualityComparer

Programcının kullanılacak parametre skorsı için herhangi bir ön bilgisinin olmadığı durumlarda.

You will need some properties that will allways be available on your type and that provide a good enough idea of what might be considered equal. All theadditional properties however should only go into the expensive Equals-method.

 

Ha o yardımcı Description attribute bizim kontramıza çıkar. Bu attribute ile ne enum elamanının niçin var olduğunu , ne sinein bu bileğere iye olduğunu kıytırıkçe tanımlayabiliriz ve bu description’a erişebiliriz.

Basically, using override would mean that you will use your .Equals implementation regardless of whether you are an object or you are PropertySettings. If you use new when you are an object you will use the base .

However, choosing the more specific type Giraffe: return value yaşama implicitly be cast to a larger type C# IEqualityComparer Nasıl Kullanılır Animal if needed; and a return type of IEnumerable implicitly casts to IEnumerable. And that's the most used variant interface. I wonder why the more general type was chosen?

The result is the same birli when using the first version of ActorComparer, although C# IEqualityComparer nerelerde kullanılıyor the new one is much more flexible in the sense that it may be used differently in different contexts and no further modifications are required to its code.