Detaylar, Kurgu ve C# IStructuralEquatable Temel Özellikleri

Detaylar, Kurgu ve C# IStructuralEquatable Temel Özellikleri

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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 this case you don't want to change your class implementation so you don't wantoverride the Equals method. this will define a general way to compare objects in your application.

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

Kakım far bey I see this is only exposed through the StructuralComparisons class. The only way I yaşama figure out to make this useful is to make a StructuralEqualityComparer helper class bey follow:

Although I think the gains from hamiş 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 katışıksız some performance benefits.

The generic tuple classes (Tuple, Tuple, Tuple, and so on) and the Array class provide explicit implementations of the IStructuralEquatable interface. By casting (in C#) or converting (in Visual Basic) the current instance of an array or tuple to an IStructuralEquatable interface value and providing your IEqualityComparer C# IStructuralEquatable Kullanımı implementation bey an argument to the Equals method, you kişi define a custom equality comparison for the array or collection.

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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

comparer IEqualityComparer İki nesnenin müsavi olup olmadığını kıymetlendirmek kucakin kullanılacak yöntemi tanımlayan nesne.

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 data that don't need to be created by the developers consuming the veri and are only really used for reading the veri.

C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.

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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. Birli the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

Burada özen ederseniz eğer ms.x ve ms.y değkârmeyeceğinden dolayı bir Deep Copy nazire konusudur. Eğer referans tipli konstrüksiyonlar olsalardı aşağıdaki kabil bir sonuç elde edilecekti ve Shallow Copy söz konusu olacaktı.