En iyi Tarafı C# ReadOnlyCollectionBase Temel Özellikleri

En iyi Tarafı C# ReadOnlyCollectionBase Temel Özellikleri

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Don't return a collection directly. Make an accurately named business logic class that reflects the purpose of the collection.

Why do these two pieces of code, which only differ by a transformation of the formula, exhibit a significant difference in running speed?

In a multithreaded environment, this is even more of an issue, bey one thread kişi make changes to the data while another is trying to read data - you birey easily get inconsistent veri in different threads.

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

Summary. The ReadOnlyCollection functions birli a wrapper for any collection that implements IList. It adds a level of indirection that reduces possible changes.

Let’s explore an example of using IReadOnlyList in place of List in order to make our list read-only. Consider the following class:

What's the best way to pass around lists of values without lots of code clutter (such bey explicit type parameters) but that still communicates intent clearly?

HashTable hash kodlarına gereğince dizdiğinden muayyen bir sıralaması yoktur.Algoritması bu kodların içre gizlidr. Dictionary ise verilerin ekleniş C# ReadOnlyCollectionBase Nerelerde Kullanılıyor sırasını hiç bileğiştirmeden saklamıştır.

collection. Sometimes I use an array internally and return an IEnumerable to indicate intent. But most of these approaches have a very low signal-to-noise ratio; and that's absolutely critical to understanding code.

If you do this then there's nothing stopping your callers casting the IEnumerable back to C# ReadOnlyCollectionBase Nasıl Kullanılır ICollection and then modifying it. ReadOnlyCollection removes this possibility, although it's still possible to access the underlying writable collection via reflection.

ElementAtOrDefault(IEnumerable, Int32) Returns the element at a C# ReadOnlyCollectionBase Nedir 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.

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A method like PayUnpaidInvoices being present may lead to second guessings about what "regular" collection methods like Remove and Clear might do. Will it just remove invoices from the in-memory collection, or will it delete them from the database?