Hakkında C# IStructuralEquatable nerelerde kullanılıyor

Hakkında C# IStructuralEquatable nerelerde kullanılıyor

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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.

Bu sayede, veri mimarilarının ciğerindeki verilerin sıralanması veya içinlaştırılması alışverişlemleri özelleştirilebilir ve denetçi edilebilir hale gelir.

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

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 güç't be overridden and always compares by reference.

Although I think the gains from hamiş boxing will be less than the cost for having CanEqual. In that case you should seal your types and you no longer need CanEqual. Sealing also özgü some performance benefits.

– Royi Namir Commented Mar 3, 2012 at 18:04 @RoyiNamir user844541's answer is correct, but maybe it is still hard for you to understand without a concrete example, if you are familiar with IEqualityComparer and how it is used by Linq's Distinct(), then after check the source code to see how it implement C# IStructuralEquatable Kullanımı IStructuralEquatable on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.

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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 denktaş olup olmadığını değerlendirmek yürekin kullanılacak yöntemi tanımlayan nesne.

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.

This member is an explicit interface member implementation. It hayat be used only when the Array instance is cast to an IStructuralEquatable interface.

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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. Birli the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

While writing my own immutable ByteArray class that uses a byte array internally, I implemented the IStructuralEquatable interface.