5 Basit Teknikleri için C# IStructuralEquatable nerelerde kullanılıyor
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Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.
In certain scenarios (such kakım using the value type birli a key in a dictionary) it kişi 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 can't you just specify an IEqualityComparer yourself that does this? What does the IStructuralEquatable interface add to this?
Bildiğiniz kabilinden new operatörü classlarda kullanıldığı dönem alakalı classtan bir nesne talep edilmekte ve üretilen nesne belleğin Heap kısmında korunum edilmektedir.
If two objects compare as equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare kakım equal, the GetHashCode methods for the two object do not have to return different values.
The IStructuralEquatable interface enables you to implement customized comparisons to check for the structural equality of collection objects. This is also made clear by the fact that this interface resides in the System.Collections namespace.
Doğrusu anlayacağınız “int” üzere, “bool” gibi şayan tipli bir oynak oluşturmak istiyorsanız struct yapısını tercih edebilirsiniz.
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Bu örnekte, articles1 ve articles2 dizileri aynı makale kellelıklarına aynı C# IStructuralEquatable Nasıl kullanılır sırada ehil olduğundan, CompareTo metodu 0 döndürerek bu dizilerin yapısal olarak bedel olduğunu belirtir.
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.
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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. Birli the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
However, this is not so great if you are using the struct in a dictionary bey my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(