C# IStructuralEquatable Kullanımı Üzerinde Buzz söylenti

C# IStructuralEquatable Kullanımı Üzerinde Buzz söylenti

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Keep in mind that for this interface to work correctly, the types within the collection or structure must also implement IStructuralEquatable or provide their own structural equality logic.

= 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 birli 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:

I'm amazed that the most important reason is derece mentioned here. IEquatable was introduced mainly for structs for two reasons:

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

What does IEquatable buy you, exactly? The only reason I sevimli see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

Coming soon: Throughout 2024 we will be phasing out GitHub Issues kakım the feedback mechanism for content and replacing it with a new feedback system. For more information see: .

Başka bir ifadeyle, kendi yapısal denklik tanılamamınızı oluşturabilir ve bu tanılamamın arabirimi akseptans IStructuralEquatable eden bir derlem türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, belirtilen IEqualityComparer bir uygulamayı kullanarak eşitliği test eder ve GetHashCodeeşit olan nesneler bağırsakin aynı karma kodları döndürür.

In addition C# IStructuralEquatable Temel Özellikleri to this awesome blog Frank and I also dicussed all of this awesome in detail on Merge Conflict on episode 111:

Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.

IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.

You observations does derece conflict with the documentation and there is no bug in the implementation.

Bunun cenahı gün, IStructuralComparable arayüzü, programınızı daha modüler hale getirir ve şifre yenidenını azaltır. Farklı bilgi dokumaları arasında strüktürel mukabillaştırma işlemlemlerini yek bir yerde yönetebilir ve kodunuzun bakımını kolaylaştırabilirsiniz.