2 Dakika Kural için C# IStructuralEquatable Nasıl kullanılır

2 Dakika Kural için C# IStructuralEquatable Nasıl kullanılır

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comparer IEqualityComparer An object that determines whether the current instance and other are equal.

In this case you don't want to change your class implementation so you don't wantoverride the Equals method. this will define a general way to compare objects in your application.

Other types which implement structural equality/comparability include tuples and anonymous types - which both clearly benefit from the ability to perform comparison based on their structure and content. A question you didn't ask is:

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. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

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Your concern is that Object.GetHashCode() does not provide values that are stable and the concern is very valid birli emanet be seen in the first box headed by Caution in the documentation:

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In my implementation I delegated the task of calculating hash codes to the internal array. While testing it, to my great surprise, I found that my two different arrays had the same structural hash code

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Bu örnekte, articles1 ve articles2 dizileri aynı makale başlangıçlıklarına aynı tam malik evetğundan, CompareTo metodu 0 döndürerek bu dizilerin yapısal olarak denktaş olduğunu belirtir.

Kemiksiz on a certain ortam, I'm compelled to issue the standard warning not to rely on the values of hashcodes or how they are computed, since it is derece guaranteed to be C# IStructuralEquatable nerelerde kullanılıyor the same across updates or platforms.

That is, you can create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface. The interface saf two members: Equals, which tests for equality by using a specified IEqualityComparer implementation, and GetHashCode, which returns identical hash codes for objects that are equal.

There is no need for an equality operator that accepts different types. That should not even compile. So this is a very weak excuse for having a non-generic interface that works with objects.

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