Benim C# IStructuralEquatable Nasıl kullanılır Başlarken Çalışmak

Benim C# IStructuralEquatable Nasıl kullanılır Başlarken Çalışmak

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However, this is an implementation detail and unless you want to rely on this in your code you cannot create a stable hash code provide an object that implements IStructuralEquatable.

In certain scenarios (such as using the value type kakım a key in a dictionary) it güç murder performance in one foul swoop.

. The best example of this is arrays, which with .NET 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:

As far birli I see this is only exposed through the StructuralComparisons class. The only way I birey figure out to make this useful is to make a StructuralEqualityComparer helper class as follow:

Although I think the gains from hamiş boxing will be less than the cost for having CanEqual. In that case you should seal your types and you no longer need CanEqual. Sealing also başmaklık some performance benefits.

The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects.

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 derece really sure if I really got it.

I've noticed these two interfaces, and several associated classes, have been added in .Kupkuru 4. They seem C# IStructuralEquatable nedir a bit superfluous to me; I've read several blogs about them, but I still sevimli't figure out what mesele they solve that was tricky before .NET 4.

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

In all my years of development and blogging I never thought I would be writing about how amazing a C# struct is, how awesome IEquatable is, and how C# 7 features make implementing all of it mind blowing.

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.

Will feeblemind affect the original creature's body when it was cast on it while it was polymorphed and reverted to its original form afterwards?

There is no need for an equality operator that accepts different types. That should not 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.