C# IStructuralComparable Nasıl kullanılır Için 5-İkinci Trick

C# IStructuralComparable Nasıl kullanılır Için 5-İkinci Trick

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İkinci öğreticide ise C# dilinin elan gelişmiş temel konuları ele alınır. Bu kısımda kodun çalışma dakikaındaki davranışını muayene etmek sinein kullanılan "Yansıma", keşik bazlı muvasala sağlayıcı "Dizin Oluşturucular", başarım ihtiyaçlarına yanıt toka etmek bâtınin kullanılan "Emin Olmayan Harf" ve birden çokça iş parçacığının eş zamanlı çkırmızııştırılmasına imkân tanıyan "Multithreading" kadar konular detaylı şekilde alışverişlenir.

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

GetEnumerator(); Örneğimizde bir “Personel” klası oluşturup, “Personeller” klası içinde ilişkin sınıfın koleksiyon yapkaloriı ve bu koleksiyona veri ekleme hizmetlevini yaratıcı Add metodunu teşhismladım. GetEnumerator metodu içerisinde ise koleksiyonumuzun GetEnumerator() metodu yardımıyla bir enumerator elde yazar return ettim.

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– Royi Namir Commented Mar 3, 2012 at 18:04 @RoyiNamir user844541's answer is correct, but maybe it is still hard for you to understand without a concrete example, if you are familiar with IEqualityComparer and how it C# IStructuralComparable Nasıl kullanılır is used by Linq's Distinct(), then after check the source code to see how it implement IStructuralEquatable on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.

You are basically extracting the actual details of comparing structures to an external class that knows how to handle the particular structures being compared.

The CompareTo method supports custom structural comparison and sorting of array and tuple objects. C# IStructuralComparable nerelerde kullanılıyor The CompareTo method calls the comparer object's IComparer.

Properties StructuralComparer Gets a predefined object that performs a structural comparison of two objects.

PackageVersionNumber is a struct in this case and really shouldn't be null. Can I safely delete the [AllowNull] attribute from the argument or do I need to leave it there and really check for null. Or is this a bug?

looks like "near the composite pattern but really hamiş kakım good". This C# IStructuralComparable Kullanımı must C# IStructuralComparable Temel Özellikleri have been done for historical reasons, since lots the IComparer interface başmaklık been implemented many times in and out of the .

Being able to specify IStructuralEquatable/IStructuralComparable in C# IStructuralComparable nedir such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you want to apply this type of comparison. The two approaches are hamiş mutually exclusive.

I suppose that the "Implement interface" feature in Visual Studio doesn't consider the type on which the interface is implemented and always uses the same snippet with that AllowNullAttribute. That attribute is indeed useful for implementing the interface for non-nullable reference types.

Int32 An integer that indicates the relationship of the current collection object to other, as shown in the following table.

comparer IComparer An object that compares members of the current collection object with the corresponding members of other.