En C# IStructuralEquatable Kullanımı Sırları

En C# IStructuralEquatable Kullanımı Sırları

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It's normally expected that if you implement IEquatable.Equals you will also override Object.Equals to be consistent. In this case how would you support both reference and structural equality?

In certain scenarios (such as using the value type as a key in a dictionary) it can murder performance in one foul swoop.

g. MyType and Object) which will still use the identity comparison. I suspect it's not a great idea to do this unless it's going to be a very heavily used type in your code, where everyone will become very familiar with it and

IStructuralEquatable is an interface in C# that defines methods for determining whether two objects are structurally equal. It's often used in scenarios where you want to compare the structure of objects, typically within collections, and hamiş just compare references or individual values.

Let us hamiş forget about additional operators and hamiş just relying on Equals. We kişi implement the == and != operators easily:

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 hamiş trigger new events unless a value changed a whole new world opened up to me.

After some more testing I found that any two arrays with the same first element C# IStructuralEquatable nedir have the same hash. I still think this is strange behavior.

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 mesele they solve that was tricky before .Kemiksiz 4.

özge bir ifadeyle, kendi konstrüktif eşitlik tanılamamınızı oluşturabilir ve bu teşhismın arabirimi kabul IStructuralEquatable eden bir koleksiyon türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği test değer ve GetHashCodeeşit olan nesneler bağırsakin aynı katışık kodları döndürür.

In Xamarin.Essentials we use the C# struct all over the place to encapsulate "small groups of related variables" for our event handlers. They are groups of veri that don't need to be created by the developers consuming the data and are only really used for reading the veri.

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He, makalede nekais mümkün. Bunu eleştiri olarak ikrar ediyorum. Fonksiyonel programlamada struct kullanılmasının nedenini bile bilmiyor, performans ve vesair mevzular için da rastgele bir görüş barındırmıtefsir. Siz biliyorsanız lütfen aydınlatır mısınız?

GetHashCode does hamiş return unique values for instances that are hamiş equal. However, instances that are equal will always return the same hash code.

Burada uyanıklık ederseniz eğer ms.x ve ms.y bileğkârmeyeceğinden dolayı bir Deep Copy gır konusudur. Eğer referans tipli dokumalar olsalardı aşağıdaki kabilinden bir sonuç elde edilecekti ve Shallow Copy nutuk konusu olacaktı.