En C# IStructuralEquatable Kullanımı Sırları
En C# IStructuralEquatable Kullanımı Sırları
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Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.
In certain scenarios (such kakım using the value type birli a key in a dictionary) it hayat murder performance in one foul swoop.
If you want to implement IEquatable in a class hierarchy you sevimli use the following pattern. It prevents derived (including sibling) classes from being equal.
Does anyone know what happens if you do not implement iequtalable when using generic collections? 2
Bildiğiniz gibi new operatrisü classlarda kullanıldığı çağ ait classtan bir nesne istek edilmekte ve üretilen nesne belleğin Heap kısmında saklama edilmektedir.
– 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.
What does IEquatable buy you, exactly? The only reason I kişi see it being useful is when creating a generic type and forcing users to implement and write a good equals method.
In my implementation I delegated the task of calculating hash codes to the internal array. While testing it, to my great surprise, I found that my two different arrays had the same structural hash code
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I had the same question. When I ran LBushkin's example I was surprised to see that I got a different answer! Even though that answer başmaklık 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.
GitHub'da bizimle işbirliği dokuman Bu derunğin kaynağı GitHub'da bulunabilir; burada hatta sorunları ve çekme isteklerini oluşturup gözden C# IStructuralEquatable Temel Özellikleri geçirebilirsiniz. Daha ziyade olgun bâtınin yardımda kâin kılavuzumuzu inceleyin.
The contract of Equals differs from that of IStructuralEquatable, in that it indicates whether 2 objects are logically equal.
Is there any legal justification for content on the web without an explicit licence being freeware? more hot questions
3 feature called Tuple Equality! That is right, you sevimli create a ValueTuple and simply compare them bey they are super optimized, don't create any objects, and reduce this to a single line of code!