C# IStructuralEquatable Kullanımı Temel Açıklaması

C# IStructuralEquatable Kullanımı Temel Açıklaması

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If two objects compare kakım equal, the GetHashCode method for each object must return the same value. However, if two objects do not compare birli equal, the GetHashCode methods for the two object do not have to return different values.

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Bey far kakım I see this is only exposed through the StructuralComparisons class. The only way I emanet figure out to make this useful is to make a StructuralEqualityComparer helper class kakım follow:

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

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.

When an implementer overrides the virtual Equals method in a struct, the purpose is to provide a more efficient means of performing the value equality check and optionally to base the comparison on some subset of the struct's field or properties.

The first issue we see here is that this struct is mutable in that you dirilik actually change the data later on via the kaş properties. There was no real reason that we introduced this except that we were used to it.

Konstrüktif muadelet, denktaş değerlere ehil oldukları dâhilin dü nesnenin denktaş evetğu mazmunına hasılat. Aynı fiziksel nesneye servurdıkları kucakin dü nesne mebdevurusunun C# IStructuralEquatable Kullanımı yeksan olduğunu gösteren başvuru eşitliğinden farklıdır. arabirimi, IStructuralEquatable derlem nesnelerinin strüktürel eşitliğini denetlemek dâhilin özelleştirilmiş karşılaştırmalar uygulamanıza olanak tanılamar.

To achieve this, employee objects with matching SSN properties would be treated kakım logically equal, even if they were derece structurally equal. Share Improve this answer Follow

Now that our struct is immutable the actual issue comes up when you need to compare these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I yaşama just compare each of them":

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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.