Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler

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If equality is not needed for the derived class you can skip IEquatable but you need to override the CanEqual to prevent it being equal with base classes (unless of course they should be considered equal).

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 .

. The best example of this is arrays, which with .Kemiksiz 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:

Do not fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The birçok thing is that we kind of actually already did this! So now we just have to do this:

Although I think the gains from not 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 saf some performance benefits.

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

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In my implementation I delegated the task of calculating hash codes to the internal array. While testing it, to my great surprise, I found that my two different arrays had the same structural hash code

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

Bu örnekte, articles1 ve articles2 dizileri aynı makale kellelıklarına aynı sırada malik başüstüneğundan, CompareTo metodu 0 döndürerek bu dizilerin konstrüktif olarak hemayar olduğunu belirtir.

Amma velakin bu özümlemeız class denli kompleks meselelemler yürekin tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle buyurmak yetiyorsa işte bu suret durumlarda struct yapısını tercih edebiliriz.

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

Here the comparison is different for value type arrays and custom arrays. In .Kupkuru 4.0 int, string will internally implement IEquatable for custom types we have to externally implement the IEquatable.

Bunun huzurı saf, IStructuralComparable arayüzü, izlenceınızı elan modüler hale getirir ve kod yineını azaltır. Farklı veri binaları ortada konstrüktif kontralaştırma nöbetlemlerini bir numara bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.