Düşünceler Hakkında Bilmek C# IStructuralEquatable nedir
Düşünceler Hakkında Bilmek C# IStructuralEquatable nedir
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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.
In certain scenarios (such as using the value type as a key in a dictionary) it can murder performance in one foul swoop.
It differs from reference equality, which indicates that two object references are equal because they reference the same physical object.
Does anyone know what happens if you do hamiş implement iequtalable when using generic collections? 2
It is used by the third example bey an argument to the Equals(Object, IEqualityComparer) method of the IStructuralEquatable interface that tuples implement. 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.
– 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 on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.
If those objects do derece contain equality/hashcode methods that satisfy that contract, you will have to wrap them and provide correct implementations for those methods yourself in the wrapper.
We can also make our own container play well with these other containers by implementing these interfaces.
The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .
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 data that don't need to be created by the developers consuming the data and are only really used for reading the data.
Kemiksiz on a certain platform, I'm compelled to issue the standard warning derece 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.
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 C# IStructuralEquatable nedir documentation and there is no bug in the implementation.
Bunun cihetı nöbet, IStructuralComparable arayüzü, izlenceınızı daha modüler hale getirir ve şifre yenidenını azaltır. Farklı bilgi gestaltları arasında strüktürel zıtlaştırma işlemlerini hiçbir bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.