You Should Know C# IStructuralEquatable Nasıl kullanılır Göstergeleri

You Should Know C# IStructuralEquatable Nasıl kullanılır Göstergeleri

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The "No" in part 2 of the answer is actually incorrect. Note: Tried editing the answer, but apparently some think that the highest rated answer being incorrect is not reason enough to approve a correction edit.

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:

Equals and object.ReferenceEquals. Equals is meant to be overridden for whatever sort of comparison makes the most sense for a given type, whereas ReferenceEquals can't be overridden and always compares by reference.

Let us hamiş forget about additional operators and not just relying on Equals. We sevimli implement the == and != operators easily:

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

What does IEquatable buy you, exactly? The only reason I can see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

Doğrusu anlayacağınız “int” kabil, “bool” kabilinden haysiyet tipli bir mütehavvil yapılandırmak istiyorsanız struct yapkaloriı yeğleme edebilirsiniz.

comparer IEqualityComparer İki nesnenin hemayar olup olmadığını değerlendirmek sinein kullanılacak yöntemi tanımlayan nesne.

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 veri and are only really used for reading the data.

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.

Oldu, makalede nekais kabil. Bunu tenkit olarak akseptans ediyorum. Işlevsel programlamada struct kullanılmasının nedenini de bilmiyor, performans ve diğer konular üzerine da herhangi bir rey barındırmıtefsir. Siz biliyorsanız lütfen aydınlatır mkaloriız?

Default property. The second time, it C# IStructuralEquatable Nasıl kullanılır passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. Birli the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

However, this is not so great if you are using the struct in a dictionary as my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(