C# IStructuralEquatable Kullanımı Üzerinde Buzz söylenti

C# IStructuralEquatable Kullanımı Üzerinde Buzz söylenti

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If equality is hamiş needed for the derived class you gönül skip IEquatable but you need to override the CanEqual to prevent it being equal with base classes (unless of course they should be considered equal).

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

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

Bildiğiniz kadar new operatörü classlarda kullanıldığı zaman ait classtan bir nesne dilek edilmekte ve üretilen nesne belleğin Heap kısmında muhafaza 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.

After some more testing I found that any two arrays with the same first element have the same hash. I still think this is strange behavior.

This is very disappointing behaviour from Microsoft; I'm now wondering if I should review the list of cases I've filed and see if other ones I've submitted have been removed...

The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .

Bir önceki konulemin aynısını AsOrdered extensionı ile kuruluşldığında muamelat gene paralel olarak bünyelır, fakat skorlar sıralı olabilir.

Fakat, fruits1 ve fruits3 dizileri aynı elemanlara farklı sıralarda mevla başüstüneğundan, CompareTo metodu farklı bir kıymet döndürür ve bu C# IStructuralEquatable nedir dizilerin strüktürel olarak tay olmadığını belirtir.

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

The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.

However, this is hamiş so great if you are using the struct in a dictionary kakım my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(