5 Basit Teknikleri için C# IStructuralEquatable Kullanımı

5 Basit Teknikleri için C# IStructuralEquatable Kullanımı

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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.

Does anyone know what happens if you do derece implement iequtalable when using generic collections? 2

You generic method özgü a type parameter T but the type is derece part of the signature of the function so how is T supposed to be used in the function? Anyway, you gönül use .NET tuples or anonymous types to create hash codes by combining values but I am hamiş sure this answers your question.

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The IEquatable implementation will require one less cast for these classes and kakım a result will be slightly faster than the standard object.Equals method that would be used otherwise. Kakım an example see the different implementation of the two methods:

I've noticed these two interfaces, and several associated classes, have been added in .Kupkuru 4. They seem a bit superfluous to me; I've read several blogs about them, but I still sevimli't figure out what sorun they solve that was tricky before .Safi 4.

(doesn't violate documentation), but it is clearly derece bey good as it would be if 0 were replaced with i. Also there's no reason to loop if the code were just going to use a single value from the array.

Bir önceki hizmetlemin aynısını AsOrdered extensionı ile dokumaldığında işlem yeniden koşut olarak gestaltlır, fakat skorlar sıralı evet.

GitHub'da bizimle işbirliği konstrüksiyonn Bu gönülğin kaynağı GitHub'da bulunabilir; burada hassaten sorunları ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Daha bir küme haber muhtevain ulamada bulunan kılavuzumuzu inceleyin.

Now that our struct is immutable the actual issue comes up when you need to compare these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I gönül just compare each of them":

There is no need for an equality operator that accepts different types. That should hamiş even compile. So this is a very weak excuse for having a non-generic interface that works with objects.

Being able to specify IStructuralEquatable/IStructuralComparable in such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you C# IStructuralEquatable nerelerde kullanılıyor want to apply this type of comparison. The two approaches are not mutually exclusive.