En iyi Tarafı C# ReadOnlyCollectionBase Temel Özellikleri
En iyi Tarafı C# ReadOnlyCollectionBase Temel Özellikleri
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There must be some InvoiceRepository and InvoicePayOperation - first of which owns the collection, second contains business logic (and takes ownership of the temporary collection passed to it). Of course, if you are used to code duplication and "naked collections", kakım you say, you won't be able to see how it hayat be avoided.
Why do these two pieces of code, which only differ by a transformation of the formula, exhibit a significant difference in running speed?
Average(IEnumerable, Func) Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.
Which means that I always have to cast the items back to MyItem when I want to use them. Also the items emanet be casted into MyItem outside the class.
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Kakım per the comments below, you dirilik prevent the possibility of downcasting by making IWriteableMyItem and WriteableMyItem private or internal. However note that this could still be circumvented via reflection - but we are protecting against accidents rather than fraud.
What's the best way to pass around lists of values without lots of code clutter (such birli explicit type parameters) C# ReadOnlyCollectionBase Nerelerde Kullanılıyor but that still communicates intent clearly?
Özellikle verilerin makul bir sıraya bakarak sorunlenmesi gereken durumlarda, Queue yararlanmaı mukayyetm projelerinin verimliliğini zaitrabilir.
Exposing the array C# ReadOnlyCollectionBase Kullanımı directly to those using it means that they C# ReadOnlyCollectionBase Nerelerde Kullanılıyor gönül modify it - this is a violation of encapsulation and data hiding.
Sometimes you may want to use an interface, perhaps because you want to mock the collection during unit testing. Please see my blog entry for adding your own interface to ReadonlyCollection by using an adapter.
One possibility is to implement your own thread-safe variant of the ReadOnlyCollection to allow locked access, though this will be non-trivial and non-performant if you want to support IEnumerable, and it still
SequenceEqual(IEnumerable, IEnumerable) Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.
1 Also, in the provided case, the best center of knowledge on whether the invoice dirilik be paid C# ReadOnlyCollectionBase Temel Özellikleri is the invoice itself, so it must have a property CanBePaid - so, a bit of cleverness eliminates the need to change "in 4 places"
One should note that aku's answer will only protect the list bey being read only. Elements in the list are still very C# ReadOnlyCollectionBase Kullanımı writable.