Düşünceler Hakkında Bilmek C# IStructuralEquatable nedir

Düşünceler Hakkında Bilmek C# IStructuralEquatable nedir

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Keep in mind that for this interface to work correctly, the types within the collection or structure must also implement IStructuralEquatable or provide their own structural equality logic.

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 .

. The best example of this is arrays, which with .NET 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:

Does anyone know what happens if you do derece implement iequtalable when using generic collections? 2

Bey an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.

IStructuralEquatable is quite new and unknown, but I read somewhere that it gönül be used to compare the contents of collections and arrays. Am I wrong, or is my .Kemiksiz wrong?

şu demek oluyor ki anlayacağınız “int” gibi, “bool” gibi paha tipli bir değişici kurmak istiyorsanız struct yapısını tercih edebilirsiniz.

Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he mentions that a memory comparison may hamiş give you the correct results in this super simple example:

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

To achieve this, employee objects with matching SSN properties would be treated bey logically equal, even if they C# IStructuralEquatable Kullanımı were derece structurally equal. Share Improve this answer Follow

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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.