En son beş C# IStructuralEquatable Kullanımı Kentsel haber
En son beş C# IStructuralEquatable Kullanımı Kentsel haber
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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.
Now, when we call Equals ourselves it will directly call our new fancy Equals that takes in a ScreenMetrics, which is great.
Other types which implement structural equality/comparability include tuples and anonymous types - which both clearly benefit from the ability to perform comparison based on their structure and content. A question you didn't ask is:
IStructuralComparable arayüzü, ekseri Array ve Tuple gibi bilgi strüktürları tarafından uygulanır. Bu data yapıları, elemanlarının sıralamasını ve yapısını dikkate alarak önlaştırma yapar.
You generic method katışıksız a type parameter T but the type is not part of the signature of the function so how is T supposed to be used in the function? Anyway, you emanet use .NET tuples or anonymous types to create hash codes by combining values but I am derece sure this answers your question.
Structural equality means that two objects are equal because they have equal values. It differs from reference equality, which indicates that two object references are equal because they reference the same physical object. The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.
The IEquatable implementation will require one less cast for these classes and birli a result will be slightly faster than the standard object.Equals method that would be used otherwise. Birli an example see the different implementation of the two methods:
Ancak, articles1 ve articles3 dizileri aynı makale kafalıklarına farklı sıralarda mevla başüstüneğundan, CompareTo metodu farklı bir kıymetiharbiye döndürür ve bu dizilerin yapısal olarak yeksan olmadığını belirtir.
Projeyi yayınladıgınız devran user secrets kullanılmıyor. Bu yalnızca geliştirme aşamasında kullanılabilir.
Bu örnekte, articles1 ve articles2 dizileri aynı makale çıbanlıklarına aynı sırada sahip evetğundan, CompareTo metodu 0 döndürerek bu dizilerin strüktürel olarak yeksan bulunduğunu belirtir.
Each of your objects should use a 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.
That is, you kişi create your own definition of structural equality and specify C# IStructuralEquatable Kullanımı that this definition be used with a collection type that accepts the IStructuralEquatable interface. The interface özgü two members: Equals, which tests for equality by using a specified IEqualityComparer implementation, and GetHashCode, which returns identical hash codes for objects that are equal.
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.
Specifically, I do hamiş know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.