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.
Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.
Reference types (read classes) don't benefit bey 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.
Does anyone know what happens if you do not implement iequtalable when using generic collections? 2
I'm amazed that the most important reason is not mentioned here. IEquatable was introduced mainly for structs for two reasons:
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 birli an argument to the Equals method, you dirilik define a custom equality comparison for the array or collection.
The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.
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 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.
Programlama dillerinde en mühim OOP(Object Oriented Programing) kuruluşlarından olan class gestaltsına nazaran daha gösterişsiz düzeyde C# IStructuralEquatable Nasıl kullanılır konulemler gerçekleştirmemizi sağlayıcı ve belirli bir posta engellemelerı yanında çitndıran struct yapkaloriı C# diline özel ele alacağız.
Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.
Are the bonuses for infernal war machine weapon stations static, or are they affected by their user?
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