Düşünceler Hakkında Bilmek C# IStructuralEquatable Temel Özellikleri

Düşünceler Hakkında Bilmek C# IStructuralEquatable Temel Özellikleri

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The individual calls to IEqualityComparer.Equals end and the IStructuralEquatable.Equals method returns a value either when a method call returns false or after all array elements or tuple components have been compared.

Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.

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.

Equals and object.ReferenceEquals. Equals is meant to be overridden for whatever sort of comparison makes the most sense for a given type, whereas ReferenceEquals birey't be overridden and always compares by reference.

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Your concern is that Object.GetHashCode() does hamiş provide values that are stable and the concern is very valid as sevimli be seen in the first box headed by Caution in the documentation:

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Ancak, articles1 ve articles3 dizileri aynı makale başlıklarına farklı sıralarda malik olduğundan, CompareTo metodu farklı bir kadir döndürür ve bu dizilerin strüktürel olarak müsavi olmadığını belirtir.

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

Bir önceki emeklemin aynısını AsOrdered extensionı ile bünyeldığında C# IStructuralEquatable Nasıl kullanılır prosedür tekrar koşut olarak gestaltlır, ancak skorlar sıralı evet.

Fakat, fruits1 ve fruits3 dizileri aynı elemanlara farklı sıralarda sahip olduğundan, CompareTo metodu farklı bir paha döndürür ve bu dizilerin strüktürel olarak yeksan olmadığını belirtir.

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

There is no need for an equality operator that accepts different types. That should hamiş even compile. So this is a very weak excuse for having a non-generic interface that works with objects.

Specifically, I do not know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.