Hakkında herşey C# IStructuralEquatable Nasıl kullanılır
Hakkında herşey C# IStructuralEquatable Nasıl kullanılır
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comparer IEqualityComparer An object that determines whether the current instance and other are 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.
That is right! When we override Equals we must also override and implement GetHashCode. I am no HashCode expert, but in the same article from Sergey is a snippet of using a ValueTuple to simplify this entire call to 1 line of code just like our fancy ValueTuple Equality above.
IStructuralComparable arayüzü, çoğu kez Array ve Tuple gibi data strüktürları tarafından uygulanır. Bu bilgi örgüları, elemanlarının sıralamasını ve yapkaloriı dikkate alarak katlaştırma yapar.
You generic method başmaklık 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 birey use .Safi tuples or anonymous types to create hash codes by combining values but I am derece sure this answers your question.
– 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 C# IStructuralEquatable Nasıl kullanılır 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.
We gönül also make our own container play well with these other containers by implementing these interfaces.
The first issue we see here is that this struct is mutable in that you yaşama actually change the data later on via the kaş properties. There was no real reason that we introduced this except that we were used to it.
When working with collections or structures where the order of elements matters, and you want to compare their structures, IStructuralEquatable dirilik be useful.
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Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.
GetHashCode does not return unique values for instances that are derece equal. However, instances that are equal will always return the same hash code.
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.