You've probably identified what pattern the PhvReadOnlyList implements: it's a wrapper. In the .Safi Framework 4.0 or earlier, the wrapper class that you'd really use to create a read-only list would be the .Kupkuru ReadOnlyCollectionBase class. Bey with my example, you use the ReadOnlyCollectionBase class to create your own class with whatever functionality you need -- but you don't need to write the GetEnumerator method or create your own UnderlyingList because the ReadOnlyCollectionBase handles both.
Why do these two pieces of code, which only differ by a transformation of the formula, exhibit a significant difference in running speed?
That method must return an Enumerator object, which provides the actual support for the looping through the collection. Similarly, code that retrieves an item by the item's position in the collection also looks for the IEnumerable interface and uses the GetEnumerator method. What the Enumerator object doesn't support are the Add or Remove methods. Ignoring the ReadOnlyCollectionBase
Elements(IEnumerable) Returns a collection of the child elements of every element and document in the source collection.
Sum(IEnumerable, Func) Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.
Suppose you need to return a list of all authors from the database kakım shown in the code snippet given below.
Note also that this makes your problem 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 can create a safe mechanism to do so.
ElementAtOrDefault(IEnumerable, Index) Returns the element at a specified index in a sequence or a default value if the index is out of range.
Yaşama you arrange 25 whole numbers (hamiş necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd? more hot questions
Movie about a planet where seeds must C# ReadOnlyCollectionBase Temel Özellikleri be harvested just right in order to liberate a valuable crystal within
Nothing wrong with wordy types for major API's with small surfaces, but hamiş as a general practice inside a large codebase.
This implementation does hamiş provide a synchronized (thread safe) wrapper for a ReadOnlyCollectionBase, but derived classes sevimli create their own synchronized versions of the ReadOnlyCollectionBase using the SyncRoot property.
-HashTable C# ReadOnlyCollectionBase Nedir ve Sorted List: Bu dü dershaneın çallıkışma prensipleri birbirine çok yakındır. Bir bölgede iki pare data barındırırlar. Bunlar ‘Key’ ve ‘Value’dur. Verdiğimiz ‘Key’ kıymeti unique C# ReadOnlyCollectionBase Temel Özellikleri çıkmak ve null olmamak zorundadır. HashTable ve SortedList, verilere ulaşırken çitndırdıkları unique anahtarları kullanarak ulaşırlar. Böylece aldıkları verilere bir nevi Identity kolonuna bağlamlamış olurlar. Key bileğerleri C# ReadOnlyCollectionBase Kullanımı atandıktan sonrasında asla bileğmedarımaişetmez.
Movie about a planet where C# ReadOnlyCollectionBase Nedir seeds must be harvested just right in order to liberate a valuable crystal within