C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım

C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım

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If equality is hamiş needed for the derived class you kişi 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).

= to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable types. There are also issues involving interfaces and operator overloading.

If you want to implement IEquatable in a class hierarchy you hayat use the following pattern. It prevents derived (including sibling) classes from being equal.

IStructuralComparable arayüzü, genellikle Array ve Tuple kabilinden veri dokumaları aracılığıyla uygulanır. Bu muta strüktürları, elemanlarının sıralamasını ve yapısını dikkate alarak karşıtlaştırma yapar.

Bey 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.

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 implementation as an argument to the Equals method, you birey define a custom equality comparison for the array or collection.

Is Légal’s reported “psychological trick” considered fair play or unacceptable conduct under FIDE rules?

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.

The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .

Bu örnekte, articles1 ve articles2 dizileri aynı makale kafalıklarına aynı sırada malik evetğundan, CompareTo metodu 0 döndürerek bu dizilerin yapısal olarak eşit olduğunu belirtir.

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

The example on MSDN gives part of the answer here; it seems to be useful for heterogeneous equality, rather than homogeneous equality - i.e. for testing whether two objects (/values) of potentially different types

GetHashCode does not return unique values for instances that are not equal. However, instances that are equal will always return the same hash code.

Burada nazarıitibar ederseniz şayet ms.x ve ms.y bileğanlayışmeyeceğinden dolayı bir Deep Copy gır konusudur. Eğer referans tipli gestaltlar olsalardı bayağıdaki gibi bir sonuç elde edilecekti ve Shallow Copy hanek konusu olacaktı.