C# IStructuralEquatable nedir Ile ilgili detaylı notlar

C# IStructuralEquatable nedir Ile ilgili detaylı notlar

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Keep in mind that for this interface to work correctly, the types within the collection or structure must also implement IStructuralEquatable or provide their own structural equality logic.

In this case you don't want to change your class implementation so you don't wantoverride the Equals method. this will define a general way to compare objects in your application.

Reference types (read classes) don't benefit birli much. The IEquatable implementation does let you avoid a cast from System.Object but that's a very trivial gain. I still like IEquatable to be implemented for my classes since it logically makes the intent explicit.

Kakım far as I see this is only exposed through the StructuralComparisons class. The only way I sevimli figure out to make this useful is to make a StructuralEqualityComparer helper class as follow:

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

Your concern is that Object.GetHashCode() does not provide values that are stable and the concern is very valid kakım güç be seen in the first box headed by C# IStructuralEquatable nerelerde kullanılıyor Caution in the documentation:

Is Légal’s reported “psychological trick” considered fair play or unacceptable conduct under FIDE rules?

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

Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he mentions that a memory comparison may hamiş give you the correct results in this super simple example:

Task oluşturmanın anlayışlemci üzerinde maliyeti vardır ve çok kısaca devam eden aksiyonlemler kucakin bir task oluşturmak genelde henüz yavaş çalışan uygulamalara neden evet.

Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.

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The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.

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