C# IStructuralEquatable nerelerde kullanılıyor Herkes İçin Eğlenceli Olabilir
C# IStructuralEquatable nerelerde kullanılıyor Herkes İçin Eğlenceli Olabilir
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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.
Bu tür bir huzurlaştırma, makale temellıklarının sıralamasının önemli olduğu durumlarda, konstrüktif benzerliklerin veya farklılıkların belirlenmesine yardımcı olabilir.
That is right! When we override Equals we must also override and implement GetHashCode. I am no HashCode expert, but in the same article from Sergey is a snippet of using a ValueTuple to simplify this entire call to 1 line of code just like our fancy ValueTuple Equality above.
Alfabemızın fevkdaki satırlarında da bahsettiğimiz üzere struct C#’ta value type yaratabileceğimiz mimaridır.
Bildiğiniz üzere new işletmenü classlarda kullanıldığı devir alakadar classtan bir nesne dileme edilmekte ve üretilen nesne belleğin Heap kısmında saklama edilmektedir.
The generic tuple classes (Tuple, Tuple, Tuple, and so on) and the Array class provide explicit implementations of the IStructuralEquatable interface. By casting (in C#) or converting (in Visual Basic) the current instance of an array or tuple to an IStructuralEquatable interface value and providing your IEqualityComparer implementation as an argument to the Equals method, you kişi define a custom equality comparison for the array or collection.
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.
This is very disappointing behaviour from Microsoft; I'm now C# IStructuralEquatable Nasıl kullanılır wondering if I should review the list of cases I've filed and see if other ones I've submitted have been removed...
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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
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The Equals method supports custom structural comparison of array and tuple objects. This method in turn calls the comparer object's IEqualityComparer.Equals method to compare individual array elements or tuple components, starting with the first element or component.