C# IStructuralEquatable nedir Ile ilgili detaylı notlar

C# IStructuralEquatable nedir Ile ilgili detaylı notlar

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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.

. The best example of this is arrays, which with .Kupkuru 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:

Daniel A.A. PelsmaekerDaniel A.A. Pelsmaeker 49.2k2121 gold badges112112 silver badges160160 bronze badges 5 In addition to answers which point to duplicate hashcodes as is documented behavior, some reasoning and reflection would also lead you to the same conclusion.

Ee laf gelimi struct yapısında da new operatörünü kullanırsak eğer ha alakalı konstrüksiyondan bir nesne üretilecektir fakat struct bir boy bos tipli değişici gestaltsında olduğundan dolayı o nesne belleğin Stack kısmında muhafaza edilecektir.

The following example defines a NanComparer class that implements the IStructuralEquatable interface. It compares two Double or two Single values by using the equality operator. C# IStructuralEquatable Kullanımı It passes values of any other type to the default equality comparer.

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

I've noticed these two interfaces, and several associated classes, have been added in .NET 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 .Kupkuru 4.

comparer IEqualityComparer İki nesnenin yeksan olup olmadığını kıymetlendirmek sinein kullanılacak yöntemi teşhismlayan nesne.

Task oluşturmanın işçiliklemci üzerinde maliyeti vardır ve çok güdük devam eden kârlemler sinein bir task tevlit etmek genel anlamda daha yavaş çtuzakışan uygulamalara sebep olur.

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Ha, makalede nekais olabilir. Bunu eleştiri olarak kabul ediyorum. Fonksiyonel programlamada struct kullanılmasının nedenini bile bilmiyor, performans ve özge mevzular üzerine da rastgele bir düşünüm çitndırmıtefsir. Siz biliyorsanız lütfen aydınlatır mısınız?

There is no need for an equality operator that accepts different types. That should not even compile. So this is a very weak excuse for having a non-generic interface that works with objects.

3 feature called Tuple Equality! That is right, you güç create a ValueTuple and simply compare them as they are super optimized, don't create any objects, and reduce this to a single line of code!