C# IStructuralEquatable Kullanımı Üzerinde Buzz söylenti

C# IStructuralEquatable Kullanımı Üzerinde Buzz söylenti

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Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.

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

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This code technically works, but is sort of a hot mess and is hamiş really maintainable. Anyone using the library would have to write this code as 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 two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

The IEquatable implementation will require one less cast for these classes and bey a result will be slightly faster than the standard object.Equals method that would be used otherwise. Birli an example see the different implementation of the two methods:

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

The first issue we see here is that this struct is mutable in that you yaşama actually change the data later on via the grup properties. There was no real reason that we introduced this except that we were used to it.

In Xamarin.Essentials we use the C# struct all over the place to encapsulate "small groups of related variables" for our event handlers. They are groups of veri that don't need to be created by the developers consuming the veri and are only really used for reading the data.

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.

IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.

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

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