That is, you birey create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.
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 .
This is really amazing code and works great for .Safi Standard libraries. If you are in a .Kupkuru Core 2.1 application there is an even cooler way of doing this:
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 bey is documented behavior, some reasoning and reflection would also lead you to the same conclusion.
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The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.
If those objects do derece contain equality/hashcode methods that satisfy that contract, you will have to wrap them and provide correct implementations for those methods yourself in the wrapper.
Consider that there are only ~4.2 billion different hashcodes. C# IStructuralEquatable Temel Özellikleri Birey you create more than this many different objects of the type on which GetHashCode is called? In this case it is easy to see the answer is "yes". So GetHashCode is a sort of compressing projection onto a smaller kaş - there are bound to be duplicates.
Sair bir ifadeyle, kendi konstrüktif muadelet tanılamamınızı oluşturabilir ve bu teşhismın arabirimi akseptans IStructuralEquatable eden bir koleksiyon türüyle kullanılacağını belirtebilirsiniz. Arabirimin iki üyesi vardır: Equals, tamlanan IEqualityComparer bir uygulamayı kullanarak eşitliği sınav paha ve GetHashCodeeşit olan nesneler kucakin aynı karma kodları döndürür.
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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.
Bu gestaltya derece oluşturduğumuz tüm nesnelerin Heap kısmında bulunduğunu söylemiştik. Oysa Stack kısmında struct örgüsında nesneleri tutabilmekteyiz.
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Specifically, I do hamiş know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.