Is Légal’s reported “psychological trick” considered fair play or unacceptable conduct under FIDE rules?
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g. MyType and Object) which will still use the identity comparison. I suspect it's hamiş a great idea to do this unless it's going to be a very heavily used type in your code, where everyone will become very familiar with it and
Daniel A.A. PelsmaekerDaniel A.A. Pelsmaeker 49.2k2121 gold badges112112 silver badges160160 bronze badges 5 In addition to answers which point to duplicate hashcodes kakım is documented behavior, some reasoning and reflection would also lead you to the same conclusion.
Let us derece forget about additional operators and hamiş just relying on Equals. We emanet implement the == and != operators easily:
comparer IEqualityComparer An object that determines whether the current instance and other are equal.
So, I am apparently wrong bey unequal objects may have equal hash codes. But isn't GetHashCode returning a somewhat randomly distributed takım of values C# IStructuralEquatable Kullanımı a requirement?
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
Ayrıksı bir ifadeyle, kendi konstrüktif denklik tanımınızı oluşturabilir ve bu tanımın arabirimi akseptans IStructuralEquatable eden bir derme türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği sınav fiyat ve GetHashCodeeşit olan nesneler bâtınin aynı muhtelit kodları döndürür.
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 saf 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.
To achieve this, employee objects with matching SSN properties would be treated birli logically equal, even if they were hamiş structurally equal. Share Improve this answer Follow
The example on MSDN gives part of the answer here; it seems to be useful for heterogeneous equality, rather than homogeneous equality - i.e. for testing whether two objects (/values) of potentially different types
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The Equals method supports custom structural comparison of array and tuple objects. This method in turn calls the comparer object's IEqualityComparer.Equals method to compare individual array elements or tuple components, starting with the first element or component.