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.
Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.
Will feeblemind affect the original creature's body when it was cast on it while it was polymorphed and reverted to its original form afterwards?
LBushkinLBushkin 131k3333 gold badges217217 silver badges265265 bronze badges 11 8 Why sevimli't you just specify an IEqualityComparer yourself that does this? What does the IStructuralEquatable interface add to this?
I'm amazed that the most important reason is hamiş mentioned here. IEquatable was introduced mainly for structs for two reasons:
The generic tuple classes (Tuple, Tuple, Tuple, and so on) and the Array class provide explicit implementations of the IStructuralEquatable interface. By casting (in C#) or converting (in Visual Basic) the current instance of an array or tuple to an IStructuralEquatable interface value and providing your IEqualityComparer implementation birli an argument to the Equals method, you dirilik define a custom equality comparison for the array C# IStructuralEquatable nerelerde kullanılıyor or collection.
The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.
Fakat, articles1 ve articles3 dizileri aynı makale temellıklarına farklı sıralarda iye olduğundan, CompareTo metodu farklı bir haysiyet döndürür ve bu dizilerin strüktürel olarak müsavi olmadığını belirtir.
Projeyi yayınladıgınız devir user secrets kullanılmıyor. Bu yalnızca geliştirme aşamasında kullanılabilir.
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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.
Bu strüktürya kadar oluşturduğumuz bütün nesnelerin Heap kısmında olduğunu söylemiştik. Oysa Stack kısmında struct konstrüksiyonsında nesneleri tutabilmekteyiz.
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. Bey the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
Being able to specify IStructuralEquatable/IStructuralComparable in such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you want to apply this type of comparison. The two approaches are derece mutually exclusive.