En son beş C# IStructuralEquatable Kullanımı Kentsel haber
En son beş C# IStructuralEquatable Kullanımı Kentsel haber
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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.
This is really amazing code and works great for .Kupkuru Standard libraries. If you are in a .Safi Core 2.1 application there is an even cooler way of doing this:
Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
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comparer IEqualityComparer An object that determines whether the current instance and other are equal.
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.
I've noticed these two interfaces, and several associated classes, have C# IStructuralEquatable Temel Özellikleri 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 .Kemiksiz 4.
(doesn't violate documentation), but it is clearly not as good as 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.
If you read this entire post and are thinking wow that is a lot of code and steps to remember then do not fear because Dustin told me and showed me that Visual Studio will generate all of this for you!!!!! Check this out:
C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.
IStructuralEquatable is used with arrays to determine whether the arrays are structurally equal. The StructuralEqualityComparer.Equals method is used for this purpose.
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.
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