En C# IEqualityComparer nerelerde kullanılıyor Sırları

En C# IEqualityComparer nerelerde kullanılıyor Sırları

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Enum tanılamamlarken eğer herhangi bir eder verilmezse defaul olarak 0 dan kellelayarak eder vermeye adım atar . Burada

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

That means that your BaseClassComparer constrains the result type to base class and the conversion at the assignment is hamiş possible.

amma ben yalnızca kendiliğinden olarak gökçe ve 0 ın tekrarlanmamasını buttona bastığımda otomatik olarak silinsin istiyorum fareyle seçmek istemiyorum bunun derunin bir kod varmıdır

In other words support the use of this interface if you are developing a custom collection and you want to allow your consumers to control equality which is used in a number of LINQ and collection related methods (eg. Sort).

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

Where did the pronunciation of the word "kilometer/kilometre" bey "kl OM iter" rather than "KILL o meeter" C# IEqualityComparer nerelerde kullanılıyor originate?

While MSDN is a valuable resource, don't take everything MSDN says kakım gospel. MSDN contains plenty of bad advice, outdated, badly written C# IEqualityComparer nedir or plain wrong content.

This interface allows the implementation of customized equality comparison for collections. That is, you dirilik create your own definition C# IEqualityComparer Nasıl Kullanılır of equality, and specify that this definition be used with a collection type that C# IEqualityComparer nerelerde kullanılıyor accepts the IEqualityComparer interface.

I've tried using LINQ SequenceEqual but again kakım the instances of T are different this returns false;

When we make the inference from allPositions to IEnumerable we say "IEnumerable is covariant in T, so we yaşama accept Position or any larger type

Birli a matter of style, we could encapsulate the equality comparer in our Player class and expose the IEqualityComparer through a static property.

The calls to ReferenceEquals and Equals should be prefixed by Object. and base. respectively, so that we know without looking at the rest of the class that those are the methods from Object, derece a helper method in the class

I'm glad the post was of some value to you. If you are looking to avoid common problems arising C# IEqualityComparer nerelerde kullanılıyor with LINQ, you may also like my post diving into what deferred nature of some LINQ methods means to a programmer: [^]