C# IStructuralEquatable nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

Wiki Article

Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.

= 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 kakım 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.

Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. Kakım the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

Kakım an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.

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.

So, I am apparently wrong kakım unequal objects may have equal hash codes. But isn't GetHashCode returning a somewhat randomly distributed set of values a requirement?

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 kişi't figure out what sıkıntı they solve that was tricky before .Kemiksiz 4.

(doesn't violate documentation), but it is clearly not bey good birli 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.

Task oluşturmanın anlayışlemci üzerinde maliyeti vardır ve çok güdük devam eden hizmetlemler muhtevain bir task yapılandırmak genel anlamda henüz yavaş çkızılışan uygulamalara vesile olabilir.

Amma velakin bu konstrüksiyonız class denli kompleks işlemlemler kucakin tasarlanmış bir yapı gerektirmiyorsa ve C# IStructuralEquatable Nasıl kullanılır tutulacak verileri enkapsüle buyurmak yetiyorsa ahacık bu janr durumlarda struct yapkaloriı tercih edebiliriz.

Ya, makalede nekais olabilir. Bunu tenkit olarak akseptans ediyorum. Işlevsel programlamada struct kullanılmasının nedenini de bilmiyor, başarım ve özge konular üzerine da herhangi bir fikir çitndırmıyorum. Siz biliyorsanız lütfen aydınlatır mısınız?

The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.

Collaborate with us on GitHub The source for this content güç be found on GitHub, where you sevimli also create and review issues and pull requests. For more information, see our contributor guide.