2 Dakika Kural için C# ReadOnlyCollectionBase Nedir

2 Dakika Kural için C# ReadOnlyCollectionBase Nedir

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This doesn't create a copy of list. ReadOnlyCollection doesn't copy the veri, it works directly on the supplied list. See documentation:

 

I avoid using ReadOnlyCollection kakım much birli possible, it is actually considerably slower than just using a uygun List.

Sum(IEnumerable, Func) Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Bu tür bir karşılaştırma, makale kafalıklarının sıralamasının önemli evetğu durumlarda, yapısal benzerliklerin yahut farklılıkların belirlenmesine yardımcı kabil.

Elemanların Sıralı Yapkaloriı Muhafaza: IList, elemanların eklenme sırasını korur. Bu özellik, data yapısının sıralı olmasını ve programın beklentilerine münasip çkızılışmasını katkısızlar.

If your only intent is to get calling code to not make a mistake, and modify the collection when it should only be reading all that is necessary is to return an interface which doesn't support Add, Remove, etc.

Average(IEnumerable, Func) Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Exposing the array directly to those using it means that they dirilik modify it - this is a violation of encapsulation and veri hiding.

Sometimes you may want to use an C# ReadOnlyCollectionBase Nasıl Kullanılır interface, perhaps because you want to mock the collection during unit testing. Please see my blog C# ReadOnlyCollectionBase Kullanımı entry for adding your own interface to ReadonlyCollection by using an adapter.

ElementAtOrDefault(IEnumerable, Int32) Returns the element C# ReadOnlyCollectionBase Nedir at a specified index in a sequence or a default value if the index is out of range.

SingleOrDefault(IEnumerable, Func) Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition.

For maximum flexibility, my class doesn't specify the veri type of the List in which it keeps its actual data. Instead, I declare my UnderlyingList variable to use any class that implements the IList interface. I've also made this a generic class: Rather than specify what kind of List I'm working with, I've forced my class to be instantiated with a veri type that the code refers to bey T. Wherever in my code I need to specify my List's data type, C# ReadOnlyCollectionBase Nedir I just use the T reference. Finally, I've chosen to have this class implement the generic version of IEnumerable, which requires two versions of the GetEnumerator method -- but the code is identical in both versions of the method. Listing 1. The basics of the PhvReadOnlyList class.

Rantabilite: Kuyruk kuruluşsı, verilerin sıralı olarak teamüllenmesi gereken dayanıklı çok C# ReadOnlyCollectionBase Nasıl Kullanılır senaryoda kullanılır ve bu kalıp nominalmın başarımını zaitrabilir.