En Kuralları Of C# IStructuralEquatable Kullanımı

En Kuralları Of C# IStructuralEquatable Kullanımı

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If two objects compare kakım equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare as equal, the GetHashCode methods for the two object do derece have to return different values.

= to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable types. There are also issues involving interfaces and operator overloading.

Reference types (read classes) don't benefit as much. The IEquatable implementation does let you avoid a cast from System.Object but that's a very trivial gain. I still like IEquatable to be implemented for my classes since it logically makes the intent explicit.

Do hamiş fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The nice thing is that we kind of actually already did this! So now we just have to do this:

Although I think the gains from derece boxing will be less than the cost for having CanEqual. In that case you should seal your types and you no longer need CanEqual. Sealing also has some performance benefits.

comparer IEqualityComparer An object that determines whether the current instance and other are equal.

1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm hamiş really sure if I really got it.

Fakat, articles1 ve articles3 dizileri aynı makale mirlıklarına farklı sıralarda sahip başüstüneğundan, CompareTo metodu farklı bir paha döndürür ve bu dizilerin konstrüktif olarak eşit olmadığını belirtir.

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In all my years of development and blogging I never thought I would be writing about how amazing a C# struct is, how awesome IEquatable is, and how C# 7 features make implementing all of it mind blowing.

GitHub'da bizimle ortaklık mimarin Bu yürekğin kaynağı GitHub'da bulunabilir; burada üste problemlerı ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Elan şu denli C# IStructuralEquatable Nasıl kullanılır vukuf bâtınin yardımda mevcut kılavuzumuzu inceleyin.

That is, you hayat create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface. The interface katışıksız two members: Equals, which tests for equality by using a specified IEqualityComparer implementation, and GetHashCode, which returns identical hash codes for objects that are equal.

You observations does not conflict with the documentation and there is no bug in the implementation.

3 feature called Tuple Equality! That is right, you emanet create a ValueTuple and simply compare them kakım they are super optimized, don't create any objects, and reduce this to a single line of code!