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?
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 .
. The best example of this is arrays, which with .Kupkuru 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:
Makalemızın yukarıdaki satırlarında da bahsettiğimiz kabil struct C#’ta value type yaratabileceğimiz kuruluşdır.
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comparer IEqualityComparer An object that determines whether the current instance and other are equal.
If those objects do hamiş 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. 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 grup - there are bound to be duplicates.
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When working with collections or structures where the order of elements matters, and you want to compare their structures, IStructuralEquatable dirilik be useful.
Each of your objects should use a C# IStructuralEquatable Temel Özellikleri 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 konstrüksiyonya kadar oluşturduğumuz bütün nesnelerin Heap kısmında bulunduğunu söylemiştik. Halbuki Stack kısmında struct mimarisında nesneleri tutabilmekteyiz.
Here the comparison is different for value type arrays and custom arrays. In .Safi 4.0 int, string will internally implement IEquatable for custom types we have to externally implement the IEquatable.
Specifically, I do derece know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.