You Should Know C# IStructuralEquatable Temel Özellikleri Göstergeleri

You Should Know C# IStructuralEquatable Temel Özellikleri Göstergeleri

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Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.

Bu tür bir hakkındalaştırma, makale kellelıklarının sıralamasının önemli olduğu durumlarda, yapısal benzerliklerin veya değişiklıkların belirlenmesine yardımcı olabilir.

. The best example of this is arrays, which with .Safi 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:

Does anyone know what happens if you do derece implement iequtalable when using generic collections? 2

I'm amazed that the most important reason is not mentioned here. IEquatable was introduced mainly for structs for two reasons:

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.

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

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In Xamarin.Essentials we use the C# struct all over the place to encapsulate "small groups of related variables" for our event handlers. They are groups of data that don't need to be created by the developers consuming the veri and are only really used for reading the veri.

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

Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.

Just look at the default ValueType.Equals(object) code that gets called otherwise. It's C# IStructuralEquatable Nasıl kullanılır an absolute performance killer that introduces boxing, type evaluation and finally falls back on reflection if any of the fields are reference types.

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.