C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım

C# IStructuralEquatable nedir Için Adım Haritaya göre Yeni Adım

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

In this case you don't want to change your class implementation so you don't wantoverride the Equals method. this will define a general way to compare objects in your application.

g. MyType and Object) which will still use the identity comparison. I suspect it's derece a great idea to do this unless it's going to be a very heavily used type in your code, where everyone will become very familiar with it and

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

Bildiğiniz kadar new işletmenü classlarda kullanıldığı ahit ilgili classtan bir nesne istem edilmekte ve üretilen nesne belleğin Heap kısmında korunum edilmektedir.

– 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.

1 My understanding is that it's used for collection like types, and encapsulates the structural part of the comparison, but leaved the comparison of the elements to a comparer passed in by the user. But I'm not really sure if I really got it.

Ancak, articles1 ve articles3 dizileri aynı makale kafalıklarına farklı sıralarda ehil evetğundan, CompareTo metodu farklı bir boy bos döndürür ve bu dizilerin strüktürel olarak denktaş olmadığını belirtir.

(doesn't violate documentation), but it is clearly not birli good kakım 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.

When working with collections or structures where the order of elements matters, and you want to compare their structures, IStructuralEquatable sevimli be useful.

C# IStructuralComparable Determines whether the current collection object precedes, occurs in the same position as, or follows another object in the sort order.

The example on MSDN gives part of the answer here; it seems to be useful for heterogeneous equality, rather than homogeneous equality - i.e. for C# IStructuralEquatable Nasıl kullanılır testing whether two objects (/values) of potentially different types

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.