En son beş C# IStructuralEquatable Kullanımı Kentsel haber

En son beş C# IStructuralEquatable Kullanımı Kentsel haber

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comparer IEqualityComparer An object that determines whether the current instance and other are equal.

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It differs from reference equality, which indicates that two object references are equal because they reference the same physical object.

Bey far birli I see this is only exposed through the StructuralComparisons class. The only way I can figure out to make this useful is to make a StructuralEqualityComparer helper class bey follow:

In this equating the values in arrays may be same or different but their object references are equal.

– 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 IStructuralEquatable on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.

After some more testing I found that any two arrays with the same first element have the same hash. I still think this is strange behavior.

We yaşama also make our own container play well with these other containers by implementing these interfaces.

(doesn't violate documentation), but it is clearly derece kakım good bey it would be if 0 were replaced with i. Also there's no reason to loop if the code were just going to use a single value from the array.

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.

GitHub'da bizimle ortaklık binan Bu gönülğin kaynağı GitHub'da bulunabilir; burada ayrıca sorunları ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Daha fazla olgun kucakin yardımda mevcut kılavuzumuzu inceleyin.

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

You observations does not conflict with the documentation and there is no bug in the implementation.

3 feature called Tuple Equality! That is right, you birey create a ValueTuple and simply compare them birli they are super optimized, don't create any objects, and reduce this to a single line of code!