Düşünceler Hakkında Bilmek C# IStructuralEquatable nedir
Düşünceler Hakkında Bilmek C# IStructuralEquatable nedir
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It's normally expected that if you implement IEquatable.Equals you will also override Object.Equals to be consistent. In this case how would you support both reference and structural equality?
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It differs from reference equality, which indicates that two object references are equal because they reference the same physical object.
IStructuralComparable arayüzü, umumiyetle Array ve Tuple kadar muta kuruluşları tarafından uygulanır. Bu bilgi örgüları, elemanlarının sıralamasını ve yapısını dikkate alarak önlaştırma yapar.
This code technically works, but is sort of a hot mess and is derece really maintainable. Anyone using the library would have to write this code kakım well. The next logical step would be to just use .Equals on the entire metrics.
– 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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Ancak, articles1 ve articles3 dizileri aynı makale kafalıklarına farklı sıralarda sahip başüstüneğundan, CompareTo metodu farklı bir ölçü döndürür ve bu dizilerin konstrüktif olarak eşit olmadığını belirtir.
Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he mentions that a memory comparison may hamiş give you the correct results in this super simple example:
In addition to this awesome blog Frank and I also dicussed all of this awesome in detail on Merge Conflict on episode 111:
Safi 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.
Bu konstrüksiyonya derece oluşturduğumuz tüm nesnelerin Heap kısmında bulunduğunu söylemiştik. Oysa Stack kısmında struct mimarisında nesneleri tutabilmekteyiz.
The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.
Being able to specify IStructuralEquatable/IStructuralComparable in such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you want to apply this type of comparison. The two approaches are derece mutually exclusive.