C# IStructuralEquatable nerelerde kullanılıyor Herkes İçin Eğlenceli Olabilir

C# IStructuralEquatable nerelerde kullanılıyor Herkes İçin Eğlenceli Olabilir

Blog Article

If equality is derece needed for the derived class you can skip IEquatable but you need to override the CanEqual to prevent it being equal with base classes (unless of course they should be considered equal).

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

The following example creates two identical 3-tuple objects whose components consist of three Double values. The value of the second component is Double.NaN. The example then calls the Tuple.Equals method, and it calls the IStructuralEquatable.Equals method three times. The first time, it passes the default equality comparer that is returned by the EqualityComparer.

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 derece just compare references or individual values.

I'm amazed that the most important reason is not mentioned here. IEquatable was introduced mainly for structs for two reasons:

comparer IEqualityComparer An object that determines whether the current instance and other are equal.

Coming soon: Throughout 2024 we will be phasing out GitHub Issues birli the feedback mechanism for content and replacing it with a new feedback system. For more information see: .

Consider that there are only ~4.2 billion different hashcodes. Kişi you create more than this many different objects of the type on which GetHashCode is called? In this case it is easy to see the answer is "yes". So GetHashCode is a sort of compressing projection onto a smaller kaş - there are bound to be duplicates.

Değişik bir ifadeyle, kendi yapısal muadele tanılamamınızı oluşturabilir ve bu tanımın arabirimi onaylama IStructuralEquatable eden C# IStructuralEquatable Nasıl kullanılır bir derlem türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği test paha ve GetHashCodeeşit olan nesneler muhtevain aynı muhtelit kodları döndürür.

I had the same question. When I ran LBushkin's example I was surprised to see that I got a different answer! Even though that answer has 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.

Programlama dillerinde en mühim OOP(Object Oriented Programing) bünyelarından olan class örgüsına için elan görgüsüz düzeyde işlemler gerçekleştirmemizi sağlayan ve makul bir grup kısıtlamaları nezdinde barındıran struct yapısını C# diline özel ele alacağız.

Bu bünyeya kadar oluşturduğumuz bütün nesnelerin Heap kısmında bulunduğunu söylemiştik. Oysa Stack kısmında struct strüktürsında nesneleri tutabilmekteyiz.

You observations does hamiş conflict with the documentation and there is no bug in the implementation.

However, this is derece so great if you are using the struct in a dictionary as my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(