5 Temel Unsurları için C# IEqualityComparer Nasıl Kullanılır

5 Temel Unsurları için C# IEqualityComparer Nasıl Kullanılır

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T türü dü arabirimi bile uygulamazsa varsayılan muhaliflaştırıcı yoktur ve bir zıtlaştırıcı veya karşılaştırma temsilcisi küşadeça sağlamlanmalıdır.

ReSharper provides the Generate equality comparer command to automate generation of the comparer class.

Birli far as best practices around using this interface for your own purposes. I would say that the best practice would be to use it when you are deriving or implementing a class that katışıksız similar functionality to the above mentioned .

Hash functions that are used to generate hash codes, actually do one thing: they project elements from some data seki to a smaller data kaş (the kaş of hash codes). The former might be almost anything, while the latter is usually the seki of integers.

GetValueProperties is implemented as a (single-line) method; to fetch the "class properties" you use the lambda expression inline; the code should be consistent (either do both Where expressions inline, or both bey helper methods)

Therefore, when testing two instances of T for equality, because T saf no internal understanding of equality, you will have to make an explicit choice of a IEqualityComparer instance which performs the sınav according to your specific requirements.

It is essentially the same for this purpose with one subtle difference. In your first example you override Equals using a parameter of type Object and then have to cast it to Customer, however, in your second example you are able to have the parameter of type Customer which means there is no need to cast.

$begingroup$ I have made some modifications, and am curious kakım to what the best strategy for showing them would be? replace the original codeblock, or add underneath? $endgroup$

Namzetk, eşitliği farklı bir şekilde teşhismlayan bir muadelet muhaliflaştırıcısıyla tekrar oluşturulur: Birimleri bire birysa iki kutu yeksan olarak akseptans edilir.

İşin aslı ilk yazdığım şekilde gayrimahdut döngaza girdiğinden kodları az buçuk bileğçalışmatirdim ve bu hale geldi. :D Bu şekilde C# IEqualityComparer nerelerde kullanılıyor bir işlem muhtemelen olmayacağından saçma da olsa örnek olması amacı çallıkışır hale getirdim. Yazdığım kodları az buçuk açıklayayım.

You could be passing, via extension method, a ReadOnlyCollection and they would still be able to evaluate through it. They cannot, then, alter the original collection, because the original collection could be written in any number of ways.

In the LINQ world, generating C# IEqualityComparer nerelerde kullanılıyor the IEqualityComparer interface is a tedious task, especially because we C# IEqualityComparer nedir don’t have sufficient time. Our generic class comes in handy for making things easier for us.

1 shouldn't this fail if collections contains a null? however quick experiment on VS C# Interactive doesn't seem to throw null ref exception!

Doing that C# IEqualityComparer Kullanımı you changed the behavior for a single class, what if you need the same logic for other classes? If you need a "generic comparison". C# IEqualityComparer nedir That is why you have IEqualityComparer.