En C# IStructuralEquatable Nasıl kullanılır Sırları

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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 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:

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.

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.

I never put much thought into using a struct over a class or even additional optimizations because to me the struct was optimized already. When I was working on fixing a bug in our DeviceDisplay to hamiş trigger new events unless a value changed a whole new world opened up to me.

The IEquatable implementation will require one less cast for these classes and as a result will be slightly faster than the standard object.Equals method that would be used otherwise. Bey an example see the different implementation of the two methods:

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.

comparer IEqualityComparer İki nesnenin eşit olup olmadığını değerlendirmek midein kullanılacak yöntemi teşhismlayan C# IStructuralEquatable Temel Özellikleri nesne.

Bir önceki işlemin aynkaloriı AsOrdered extensionı ile strüktürldığında işlem yeniden muvazi olarak bünyelır, ancak payanlar sıralı olabilir.

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Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.

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