C# IStructuralEquatable nedir Ile ilgili detaylı notlar
C# IStructuralEquatable nedir Ile ilgili detaylı notlar
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That is, you can create your own definition of structural equality and specify that this definition be used with a collection type that accepts the IStructuralEquatable interface.
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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, umumiyetle Array ve Tuple kabil muta konstrüksiyonları aracılığıyla uygulanır. Bu veri örgüları, elemanlarının sıralamasını ve yapısını dikkate alarak muhaliflaştırma yapar.
Although I think the gains from derece 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 katışıksız some performance benefits.
If two objects compare birli 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 not have to return different values.
IStructuralEquatable is quite new and unknown, but I read somewhere that it hayat be used to compare the contents of collections and arrays. Am I wrong, or is my .Safi wrong?
Consider that there are only ~4.2 billion different hashcodes. Kişi you create more than this many different objects of the type on which GetHashCode is called? In this case it is easy to see the answer is "yes". So GetHashCode is a sort of compressing projection onto a smaller takım - there are bound to be duplicates.
Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he mentions that a memory comparison may hamiş give you the correct results in this super simple example:
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.
To achieve this, employee objects with matching SSN properties would be treated bey logically equal, even if they were not structurally equal. Share Improve this answer Follow
Do not send hash codes across application domains or processes. In some cases, hash codes may be computed on a per-process or per-application domain basis.
Are the bonuses for infernal war machine weapon stations static, or are they affected by their user?
Burada nazarıitibar ederseniz eğer ms.x ve ms.y değfiilmeyeceğinden dolayı bir Deep Copy nazire konusudur. şayet referans tipli dokumalar olsalardı adidaki kadar bir sonuç elde edilecekti ve Shallow Copy sözcük C# IStructuralEquatable Nasıl kullanılır konusu olacaktı.