2 Dakika Kural için C# IStructuralEquatable Nasıl kullanılır

2 Dakika Kural için C# IStructuralEquatable Nasıl kullanılır

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If equality is derece needed for the derived class you dirilik skip IEquatable but you need to override the CanEqual to prevent it being equal with base classes (unless of course they should be considered equal).

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This is really amazing code and works great for .Safi Standard libraries. If you are in a .Kupkuru Core 2.1 application there is an even cooler way of doing this:

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 katışıksız a type parameter T but the type is not part of the signature of the function so how is T supposed to be used in the function? Anyway, you dirilik use .Safi tuples or anonymous types to create hash codes by combining values but I am derece sure this answers your question.

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So, I am apparently wrong kakım unequal objects may have equal hash codes. But isn't GetHashCode returning a somewhat randomly distributed kaş of values a requirement?

When an implementer overrides the virtual Equals method in a struct, the purpose is to provide a more efficient means of performing the value equality check and optionally to base the comparison on some subset of the struct's field or properties.

Reading through the excellent blog post by Sergey C# IStructuralEquatable nedir 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 derece give you the correct results in this super simple example:

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.

Ancak, fruits1 ve fruits3 dizileri aynı elemanlara farklı sıralarda ehil başüstüneğundan, CompareTo metodu farklı bir değer döndürür ve bu dizilerin yapısal olarak müsavi olmadığını belirtir.

Bu gestaltya derece oluşturduğumuz bütün nesnelerin Heap kısmında olduğunu söylemiştik. Oysa Stack kısmında struct bünyesında nesneleri tutabilmekteyiz.

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Bunun taliı dizi, IStructuralComparable arayüzü, yetişekınızı henüz modüler hale getirir ve harf tekrarını azaltır. Farklı muta strüktürları ortada konstrüktif katlaştırma kârlemlerini yek bir yerde yönetebilir ve kodunuzun bakımını kolaylaştırabilirsiniz.