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.

In certain scenarios (such bey using the value type bey a key in a dictionary) it can murder performance in one foul swoop.

. The best example of this is arrays, which with .NET 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:

IStructuralEquatable is an interface in C# that defines methods for determining whether two objects are structurally equal. It's often used in scenarios where you want to compare the structure of objects, typically within collections, and hamiş just compare references or individual values.

You generic method has a type parameter T but the type is hamiş part of the signature of the function so how is T supposed to be used in the function? Anyway, you emanet use .Kemiksiz tuples or anonymous types to create hash codes by combining values but I am not sure this answers your question.

If two objects compare kakım equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare as equal, the GetHashCode methods for the two object do derece have to return different values.

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.

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

Projeyi yayınladıgınız mevsim user secrets kullanılmıyor. Bu yalnızca geliştirme aşamasında kullanılabilir.

Konstrüktif müsavat, denktaş değerlere sahip oldukları bâtınin iki nesnenin müsavi evetğu medlulına gelir. Aynı fiziksel nesneye temelvurdıkları yürekin iki nesne kellevurusunun denktaş olduğunu gösteren müracaat eşitliğinden farklıdır. arabirimi, IStructuralEquatable derlem nesnelerinin strüktürel eşitliğini denetlemek muhtevain özelleştirilmiş zıtlaştırmalar uygulamanıza olanak tanılamar.

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That is, you güç create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface. The interface özgü two members: Equals, which tests for equality by using a specified IEqualityComparer implementation, and GetHashCode, which returns identical hash codes for objects that are equal.

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

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