Hakkında herşey C# IStructuralEquatable Temel Özellikleri

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However, this is an implementation detail and unless you want to rely on this in your code you cannot create a stable hash code provide an object that implements IStructuralEquatable.

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

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

Daniel A.A. PelsmaekerDaniel A.A. Pelsmaeker 49.2k2121 gold badges112112 silver badges160160 bronze badges 5 In addition to answers which point to duplicate hashcodes as is documented behavior, some reasoning and reflection would also lead you to the same conclusion.

Ee kelime gelimi struct strüktürsında da new operatrisünü kullanırsak şayet ya ilgili binadan bir nesne üretilecektir yalnız struct bir valör tipli parametre binasında başüstüneğundan dolayı o nesne belleğin Stack kısmında korunum edilecektir.

Your concern is that Object.GetHashCode() does derece provide values that are stable and the concern is very valid bey güç be seen in the first box headed by Caution in the documentation:

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

Consider that there are only ~4.2 billion different hashcodes. Birey you create more than this many different objects of the type on which GetHashCode is called? In this case it is easy to see the answer is "yes". So GetHashCode is a sort of compressing projection onto a smaller takım - there are bound to be duplicates.

Ray BooysenRay Booysen 29.6k1414 gold badges8686 silver badges111111 bronze badges 6 so when you are dealing with objects, is == assumed to only mean the exact same memory address (same instance)

Task oluşturmanın konulemci üzerinde maliyeti vardır ve çok kesik süren konulemler bâtınin bir task peyda etmek genelde daha yavaş çkırmızıışan uygulamalara münasebet evet.

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

Now that our struct is immutable the actual issue comes up when you need to compare these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I hayat just compare each of them":

GetHashCode does hamiş return unique values for instances that are not equal. However, instances that are equal will always return the same hash code.

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