En C# IStructuralEquatable Nasıl kullanılır Sırları
En C# IStructuralEquatable Nasıl kullanılır Sırları
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However, this is an implementation detail and unless you want to rely on this in your code you cannot create a stable hash code provide an object that implements IStructuralEquatable.
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If you want to implement IEquatable in a class hierarchy you birey 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
It is used by the third example kakım an argument to the Equals(Object, IEqualityComparer) method of the IStructuralEquatable interface that tuples implement. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.
– 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.
1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm derece really sure if I really got it.
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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Bu örnekte, articles1 ve articles2 dizileri aynı makale çıbanlıklarına aynı sırada ehil olduğundan, CompareTo metodu 0 döndürerek bu dizilerin yapısal olarak bedel olduğunu belirtir.
Amma velakin bu özümlemeız class derece kompleks meselelemler sinein tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle geçirmek yetiyorsa işte bu stil durumlarda struct yapısını yeğleme edebiliriz.
IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.
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. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
Burada nazarıitibar ederseniz şayet ms.x ve C# IStructuralEquatable Nasıl kullanılır ms.y bileğhizmetmeyeceğinden dolayı bir Deep Copy söylenti konusudur. Eğer referans tipli strüktürlar olsalardı kötüdaki gibi bir sonuç elde edilecekti ve Shallow Copy söz konusu olacaktı.