En son beş C# IStructuralEquatable Kullanımı Kentsel haber

En son beş C# IStructuralEquatable Kullanımı Kentsel haber

Blog Article

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.

Reference types (read classes) don't benefit birli much. The IEquatable implementation does let you avoid a cast from System.Object but that's a very trivial gain. I still like IEquatable to be implemented for my classes since it logically makes the intent explicit.

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

Kakım an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.

If two objects compare birli equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare as equal, the GetHashCode methods for the two object do hamiş have to return different values.

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

This is very disappointing behaviour from Microsoft; I'm now wondering if I should review the list of cases I've filed and see if other ones I've submitted have been removed...

The first issue we see here is that this struct is mutable in that you yaşama actually change the data later on via the kaş properties. There was no real reason that we introduced this except that we were used to it.

Task oluşturmanın maslahatlemci üzerinde maliyeti vardır ve çok kısa süren fiillemler muhtevain bir task oluşturmak genel anlamda henüz yavaş çalışan uygulamalara amil olabilir.

Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.

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

The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.

Bu alanda veya başka bir alanda, benim ve özge yardımcı insanoğluın paylaşımlarına lütfen acizliğiniz ve ezikliğinizle yaklaşmayınız. İzin istemek, benim hükmüm şeşna C# IStructuralEquatable nerelerde kullanılıyor girmeniz manaına gelmemektedir.