Hakkında C# IStructuralEquatable Temel Özellikleri

That is, you yaşama create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.

Bu sayede, done binalarının mideindeki verilerin sıralanması yahut karşılaştırılması aksiyonlemleri özelleştirilebilir ve arama edilebilir hale gelir.

If you want to implement IEquatable in a class hierarchy you güç use the following pattern. It prevents derived (including sibling) classes from being equal.

LBushkinLBushkin 131k3333 gold badges217217 silver badges265265 bronze badges 11 8 Why hayat't you just specify an IEqualityComparer yourself that does this? What does the IStructuralEquatable interface add to this?

It is used by the third example kakım an argument to the Equals(Object, IEqualityComparer) method of the IStructuralEquatable interface that tuples implement. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

– 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.

What does IEquatable buy you, exactly? The only reason I güç see it being useful is when creating a generic type and forcing users to implement and write a good equals method.

Ancak, articles1 ve articles3 dizileri aynı makale başlangıçlıklarına farklı sıralarda malik olduğundan, CompareTo metodu farklı bir haysiyet döndürür ve bu dizilerin strüktürel olarak hemayar olmadığını belirtir.

(doesn't violate documentation), but it is clearly hamiş kakım good as it would be if 0 were replaced with i. Also there's no reason to loop if the code were just going to use a single value from the array.

In all my years of development and blogging I never thought I would be writing about how amazing a C# struct is, how awesome IEquatable is, and how C# 7 features make implementing all of it mind blowing.

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

Just look at the default ValueType.Equals(object) code that gets called otherwise. It's 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.