5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor

5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor

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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 certain scenarios (such bey using the value type birli a key in a dictionary) it can murder performance in one foul swoop.

g. MyType and Object) which will still use the identity comparison. I suspect it's not a great idea to do this unless it's going to be a very heavily used type in your code, where everyone will become very familiar with it and

IStructuralEquatable is an interface in C# that defines methods for determining whether two objects are structurally equal. It's often used in scenarios where you want to compare the structure of objects, typically within collections, and not just compare references or individual values.

You generic method başmaklık a type parameter T but the type is not part of the signature of the function so how is T supposed to be used in the function? Anyway, you emanet use .NET tuples or anonymous types to create hash codes by combining values but I am hamiş sure this answers your question.

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.

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

Defines a generalized method that a value type or class implements to create a type-specific method for determining equality of instances.

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

In all my years of development and blogging I never thought I would be writing about how amazing a C# struct is, how awesome IEquatable is, and how C# 7 features make implementing all of it mind blowing.

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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

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.

Bunun kanatı silsile, IStructuralComparable arayüzü, izlenceınızı elan modüler hale getirir ve kod yenidenını azaltır. Farklı bilgi örgüları ortada konstrüktif karşılaştırma alışverişlemlerini bir numara bir yerde yönetebilir ve kodunuzun bakımını kolaylaştırabilirsiniz.