Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler

Açıklanan C# IStructuralEquatable Kullanımı Hakkında 5 Kolay Gerçekler

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It's normally expected that if you implement IEquatable.Equals you will also override Object.Equals to be consistent. In this case how would you support both reference and structural equality?

1 How do such comparators relate to things like Dictionary and other collections? I know that Dictionary seems to handle structures sensibly albeit slowly in .

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

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. As 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 birli well. The next logical step would be to just use .Equals on the entire metrics.

The following example defines a NanComparer class that implements the IStructuralEquatable interface. It compares two Double or C# IStructuralEquatable Temel Özellikleri two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

Coming soon: Throughout 2024 we will be phasing out GitHub Issues bey the feedback mechanism for content and replacing it with a new feedback system. For more information see: .

In my implementation I delegated the task of calculating hash codes to the internal array. While testing it, to my great surprise, I found that my two different arrays had the same structural hash code

Projeyi yayınladıgınız dem user secrets kullanılmıyor. Bu yalnızca geliştirme aşamasında kullanılabilir.

In addition to this awesome blog Frank and I also dicussed all of this awesome in detail on Merge Conflict on episode 111:

Each of your objects should use a hashcode based on the contents of the object. If you have a value type containing 3 ints, use those when computing the hash code. Like this, all objects with identical content will have the same hash code, independent of app domain and other circumstances.

The example on MSDN gives part of the answer here; it seems to be useful for heterogeneous equality, rather than homogeneous equality - i.e. for testing whether two objects (/values) of potentially different types

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Specifically, I do hamiş know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.