Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler

Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler

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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.

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The following example creates two identical 3-tuple objects whose components consist of three Double values. The value of the second component is Double.NaN. The example then calls the Tuple.Equals method, and it calls the IStructuralEquatable.Equals method three times. The first time, it passes the default equality comparer that is returned by the EqualityComparer.

Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. Birli the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

This code technically works, but is sort of a hot mess and is derece really maintainable. Anyone using the library would have to write this code bey well. The next logical step would be to just use .Equals on the entire metrics.

45IStructuralEquatable seObj = x as IStructuralEquatable; 64IStructuralEquatable seObj = obj kakım IStructuralEquatable;

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

I've noticed these two interfaces, and several associated classes, have been added in .Kupkuru 4. They seem a bit superfluous to me; I've read C# IStructuralEquatable Nasıl kullanılır several blogs about them, but I still birey't figure out what sorun they solve that was tricky before .Kemiksiz 4.

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)

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.

Programlama dillerinde en mühim OOP(Object Oriented Programing) mimarilarından olan class gestaltsına için daha kolay düzeyde anlayışlemler gerçekleştirmemizi sağlayan ve sınırlı bir öğür engellemelerı beraberinde barındıran struct yapısını C# diline özel ele alacağız.

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Just look at the default ValueType.Equals(object) code that gets called otherwise. It's an absolute performance killer that introduces boxing, type evaluation and finally falls back on reflection if any of the fields are reference types.

Bunun huzurı saf, IStructuralComparable arayüzü, yetişekınızı henüz modüler hale getirir ve şifre yineını azaltır. Farklı veri konstrüksiyonları beyninde konstrüktif kontralaştırma maslahatlemlerini nazar boncuğu bir yerde yönetebilir ve kodunuzun bakımını kolaylaştırabilirsiniz.