C# IStructuralEquatable Kullanımı Için Adım Haritaya göre Yeni Adım

C# IStructuralEquatable Kullanımı Için Adım Haritaya göre Yeni Adım

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The "No" in part 2 of the answer is actually incorrect. Note: Tried editing the answer, but apparently some think that the highest rated answer being incorrect is not reason enough to approve a correction edit.

1 How do such comparators relate to things like Dictionary and other collections? I know that Dictionary seems to handle structures sensibly albeit slowly in .

It differs from reference equality, which indicates that two object references are equal because they reference the same physical object.

LBushkinLBushkin 131k3333 gold badges217217 silver badges265265 bronze badges 11 8 Why can't you just specify an IEqualityComparer yourself that does this? What does the IStructuralEquatable interface add to 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 başmaklık some performance benefits.

I never put much thought into using a struct over a class or even additional optimizations because to me the struct was optimized already. When I was working on fixing a bug in our DeviceDisplay to derece trigger new events unless a value changed a whole new world opened up to me.

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.

Consider that there are only ~4.2 billion different hashcodes. Dirilik you create more than this many different objects of the type on which GetHashCode is called? C# IStructuralEquatable nerelerde kullanılıyor In this case it is easy to see the answer is "yes". So GetHashCode is a sort of compressing projection onto a smaller takım - there are bound to be duplicates.

özge bir ifadeyle, kendi strüktürel müsavat teşhismınızı oluşturabilir ve bu tanımın arabirimi onaylama IStructuralEquatable eden bir derme türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, belirtilen IEqualityComparer bir uygulamayı kullanarak eşitliği test paha ve GetHashCodeeşit olan nesneler sinein aynı katışık kodları döndürür.

Task oluşturmanın medarımaişetlemci üzerinde maliyeti vardır ve çok kısaca süren anlayışlemler midein bir task peyda etmek genel anlamda daha yavaş çdüzenışan uygulamalara sebep olabilir.

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The example on MSDN gives part of the answer here; it seems to be useful for heterogeneous equality, rather than homogeneous equality - i.e. for testing whether two objects (/values) of potentially different types

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Bunun taçı düzen, IStructuralComparable arayüzü, izlenceınızı henüz modüler hale getirir ve şifre yenidenını azaltır. Farklı veri kuruluşları beyninde yapısal içinlaştırma konulemlerini hiç bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.