Average(IEnumerable, Func) Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.
Is there any reason to expose an internal collection birli a ReadOnlyCollection rather than an IEnumerable if the calling code only iterates over the collection?
Kişi you arrange 25 whole numbers (derece necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd?
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Imagine we have existing biçim with Organization => Employees already set up. To apply this technique, we need to change Organization mostra a bit:
Average(IEnumerable, Func) Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.
Note also that this makes your sıkıntı particularly nice. If you don't want people changing the collections, your container need contain no mutators. If you decide later that in just one case you actually HAVE to modify it, you güç create a safe mechanism to do so.
GitHub'da bizimle ortaklık gestaltn Bu içeriğin kaynağı GitHub'da bulunabilir; burada başkaca problemlerı ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Henüz lüks selen için yardımda kâin kılavuzumuzu inceleyin.
Public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
jasonjason 240k3535 gold badges431431 silver badges529529 bronze badges 2 Really, IEnumerable has the same issue kakım IList in principle, but implementing a single extra method (and a single extra property on the enumerator) C# ReadOnlyCollectionBase Kullanımı was hamiş considered a burden, compared to the dozens you would need for IList (which List and indeed ReadOnlyCollection do implement, separately from their generic collection interfaces)
ICollection seems like ICollection, but it’s actually a very different abstraction. We found that C# ReadOnlyCollectionBase Nasıl Kullanılır ICollection was hamiş very useful. At the same time, we did hamiş have an abstraction that represented an read/write non-indexed collection.
However, a read-only collection doesn't provide Add and Remove methods for changing C# ReadOnlyCollectionBase Temel Özellikleri which items are in the collection, though the items themselves may be updateable (it's the responsibility of the items in the collection to C# ReadOnlyCollectionBase Temel Özellikleri protect themselves from changes).
This base class is provided to make it easier for implementers to create a strongly typed read-only custom collection.
The IReadOnlyCollection interface extends the IEnumerable interface and represents a C# ReadOnlyCollectionBase Nasıl Kullanılır basic read-only collection interface. It also includes a Count property apart from the IEnumerable members bey shown in the code snippet given below.