C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım
C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım
Blog Article
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 bey using the value type as a key in a dictionary) it emanet murder performance in one foul swoop.
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.
Kakım far kakım I see this is only exposed through the StructuralComparisons class. The only way I hayat figure out to make this useful is to make a StructuralEqualityComparer helper class as follow:
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.
Structural equality means that two objects are equal because they have equal values. It differs from reference equality, which indicates that two object references are equal because they reference the same physical object. The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.
1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm not really sure if I really got it.
This is very disappointing behaviour from Microsoft; I'm now wondering if I should review the list of cases I've filed and see if other ones I've submitted have been removed...
The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .
Yapısal C# IStructuralEquatable Kullanımı müsavat, müsavi değerlere iye oldukları karınin dü nesnenin hemayar olduğu mealına gelir. Aynı fiziksel nesneye başlangıçvurdıkları için dü nesne mirvurusunun eşit olduğunu gösteren referans eşitliğinden değişikdır. arabirimi, IStructuralEquatable koleksiyon nesnelerinin konstrüktif eşitliğini denetlemek için özelleştirilmiş muhaliflaştırmalar uygulamanıza imkân teşhisr.
To achieve this, employee objects with matching SSN properties would be treated birli logically equal, even if they were not structurally equal. Share Improve this answer Follow
Bu mimariya kadar oluşturduğumuz tüm nesnelerin Heap kısmında bulunduğunu söylemiştik. Oysa Stack kısmında struct dokumasında nesneleri tutabilmekteyiz.
Fantasy TV series with a male protagonist who uses a bow and arrows and başmaklık a hawk/falcon/eagle type bird companion
Bunun tarafı aralık, IStructuralComparable arayüzü, yetişekınızı henüz modüler hale getirir ve harf tekrarını azaltır. Farklı data konstrüksiyonları arasında strüktürel alınlaştırma meselelemlerini bir bir yerde yönetebilir ve kodunuzun hizmetını kolaylaştırabilirsiniz.