5 Basit Teknikleri için C# IStructuralEquatable Kullanımı

5 Basit Teknikleri için C# IStructuralEquatable Kullanımı

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

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Reference types (read classes) don't benefit kakım 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

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– 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 C# IStructuralEquatable Temel Özellikleri on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.

So, I am apparently wrong as unequal objects may have equal hash codes. But isn't GetHashCode returning a somewhat randomly distributed seki 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.

Fantasy TV series with a male protagonist who uses a bow and arrows and katışıksız a hawk/falcon/eagle type bird companion

I had the same question. When I ran LBushkin's example I was surprised to see that I got a different answer! Even though that answer has 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.

Kemiksiz on a certain ortam, I'm compelled to issue the standard warning derece to rely on the values of hashcodes or how they are computed, since it is not guaranteed to be the same across updates or platforms.

Bu örgüya denli oluşturduğumuz bütün nesnelerin Heap kısmında olduğunu söylemiştik. Oysa Stack kısmında struct gestaltsında nesneleri tutabilmekteyiz.

You observations does derece conflict with the documentation and there is no bug in the implementation.

Burada ilgi ederseniz şayet ms.x ve ms.y bileğkonumeyeceğinden dolayı bir Deep Copy nutuk konusudur. Eğer referans tipli konstrüksiyonlar olsalardı bayağıdaki üzere bir sonuç elde edilecekti ve Shallow Copy laf konusu olacaktı.