Detaylar, Kurgu ve C# IStructuralEquatable Temel Özellikleri

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The individual calls to IEqualityComparer.Equals end and the IStructuralEquatable.Equals method returns a value either when a method call returns false or after all array elements or tuple components have been compared.

= to provide value equality checks (vs the default reference equality check). The MSDN documentation suggests you only do it for immutable types. There are also issues involving interfaces and operator overloading.

If you want to implement IEquatable in a class hierarchy you sevimli use the following pattern. It prevents derived (including sibling) classes from being equal.

Do derece fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The nice thing is that we kind of actually already did this! So now we just have to do this:

It is used by the third example as an argument to the Equals(Object, IEqualityComparer) method of the IStructuralEquatable interface that tuples implement. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

– Royi Namir Commented Mar 3, 2012 at 18:04 @RoyiNamir user844541's answer is correct, but maybe it is still hard for you to understand without a concrete example, if you are familiar with IEqualityComparer and how it is used by Linq's Distinct(), then after check the source code to see how it implement IStructuralEquatable on referencesource.microsoft.com/#mscorlib/system/collections/…, then you will see how it work.

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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

comparer IEqualityComparer İki nesnenin yeksan olup olmadığını gitmek bâtınin kullanılacak yöntemi teşhismlayan nesne.

I had the same question. When I ran LBushkin's example I was surprised to see that I got a different answer! Even though that answer has 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.

Net 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 not guaranteed to be the same across updates or platforms.

Evet, makalede nekais olabilir. Bunu tenkit olarak akseptans ediyorum. Işlevsel programlamada struct kullanılmasının nedenini de bilmiyor, başarım ve sair C# IStructuralEquatable nedir konular üzerine da herhangi bir fikir barındırmıversiyon. Siz biliyorsanız lütfen aydınlatır mısınız?

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