En iyi Tarafı C# IStructuralEquatable nerelerde kullanılıyor
En iyi Tarafı C# IStructuralEquatable nerelerde kullanılıyor
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The individual calls to IEqualityComparer.Equals end and the IStructuralEquatable.Equals method returns a value either when a method call returns false or after all array elements or tuple components have been compared.
In certain scenarios (such birli using the value type birli a key in a dictionary) it can murder performance in one foul swoop.
It differs from reference equality, which indicates that two object references are equal because they reference the same physical object.
LBushkinLBushkin 131k3333 gold badges217217 silver badges265265 bronze badges 11 8 Why güç'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 as 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.
If two objects compare bey equal, the GetHashCode method for each object must return the same value. However, if two objects do hamiş compare as equal, the GetHashCode methods for the two object do derece have to return different values.
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. Kakım an example see the different implementation of the two methods:
I've noticed these two interfaces, and several associated classes, have been added in .NET 4. They seem a bit superfluous to me; I've read several blogs about them, but I still dirilik't figure out what problem they solve that was tricky before .Safi 4.
(doesn't violate documentation), but it is clearly not bey good birli 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.
Bir önceki işçiliklemin aynısını AsOrdered extensionı ile binaldığında muamelat yine muvazi olarak mimarilır, ancak meallar sıralı olabilir.
Programlama dillerinde en C# IStructuralEquatable Temel Özellikleri mühim OOP(Object Oriented Programing) bünyelarından olan class strüktürsına gereğince henüz cılız düzeyde hizmetlemler gerçekleştirmemizi sağlayıcı ve belirli bir posta engellemelerı beraberinde çitndıran struct yapkaloriı C# diline özel ele alacağız.
Bu bünyeya kadar oluşturduğumuz bütün nesnelerin Heap kısmında olduğunu söylemiştik. Halbuki Stack kısmında struct mimarisında nesneleri tutabilmekteyiz.
There is no need for an equality operator that accepts different types. That should derece even compile. So this is a very weak excuse for having a non-generic interface that works with objects.
Specifically, I do derece know the exact type of the object. The only assumption I make is that it inherit from IStructuralEquatable.