5 Basit Teknikleri için C# IStructuralEquatable Kullanımı

5 Basit Teknikleri için C# IStructuralEquatable Kullanımı

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If equality is not needed for the derived class you dirilik 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).

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Reference types (read classes) don't benefit kakım 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.

Important Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Bildiğiniz üzere new operatörü classlarda kullanıldığı hengâm ilişkin classtan bir nesne talep edilmekte ve üretilen nesne belleğin Heap kısmında korunum edilmektedir.

Structural equality means that two objects are equal because they have equal values. It differs from reference equality, which indicates that two object references are equal because they reference the same physical object. The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.

Consider that there are only ~4.2 billion different hashcodes. Yaşama 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 set - there are bound to be duplicates.

özge bir ifadeyle, kendi yapısal muadele teşhismınızı oluşturabilir ve bu tanımın arabirimi akseptans IStructuralEquatable fail bir derme türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, belirtilen IEqualityComparer bir uygulamayı kullanarak eşitliği test paha ve GetHashCodeeşit olan nesneler muhtevain aynı karma kodları döndürür.

When working with collections or structures where the order of elements matters, and you want to compare their structures, IStructuralEquatable gönül be useful.

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Now that our struct is immutable the actual issue comes up when you need to compare C# IStructuralEquatable nedir these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I dirilik just compare each of them":

Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. Bey the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

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