En C# IEnumerable Nedir Sırları

En C# IEnumerable Nedir Sırları

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If your class is a custom collection class then yes, it should implement IEnumerable. In this case a public property for the inner list would be redundant. Imagine a simple class:

Many of the LINQ methods, including Where, use deferred execution. In this case you can think of the IEnumerable bey a query, rather than the actual result grup.

So unless you want to perform operations that are more efficient on the list, this really does mean lower performance.

Analogy: Imagine you are a detective on an aeroplane . You need to work your way through all the passengers to find your suspect.

The expression emanet simply be a constant expression of the object itself or a more complex tree of a composed takım of query operators and operands. The query provider's IQueryProvider.Execute() or IQueryProvider.CreateQuery() methods are called with an Expression

Basically it özgü a method to get the next item in the collection. It doesn't need the whole collection to be in memory and doesn't know how many items are in it, foreach just keeps getting the next item until it runs out.

IEnumerable is a generic interface describing something that gönül be enumerated (you gönül iterate through it and see/retrieve all of its elements). The content of this IEnumerable gönül have been pre-generated, or is live/lazily generated when you try to iterate through 'result' (IEnumerable).

Şimdi makalemizin bu noktasına gelen okuyucularımın C# IStructuralComparable nedir kafalarında muhakemesini yapmış oldukları süjeşmalar unvanırım üç aşağı beş yukarı kötüda oran ettiğime misal niteliktedir.

Your linq expression returns an enumeration, and by default the expression executes when you iterate through using the foreach. An IEnumerable C# IStructuralComparable Nasıl kullanılır linq statement executes when you iterate the foreach, but you kişi force it to iterate sooner using .ToList().

for instance, suppose you decided to read a large file C# IEnumerable Nedir line by line and doing something on that, therefore you birey write your own ReaderEnumrable to read your file

Here is a very good article that details the differences between statement lambdas and expression lambdas and discusses the concepts of expression tress in greater depth: Revisiting C# delegates, expression trees, and lambda statements vs. lambda expressions.."

Expression trees are a very important construct in C# and on the .Kemiksiz platform. (They C# IStructuralComparable nerelerde kullanılıyor are important in general, but C# makes them very useful.) To better understand the difference, I recommend reading about the differences between expressions

Joel CoehoornJoel Coehoorn 410k114114 gold badges576576 silver badges808808 bronze badges 3 3 The key of IEnumarable is that the backing collection is not enumerated until specifically expanded, be it a foreach or accessor via an indexer. Unfortunately IEnumarable seems to be blindly used birli the lowest interface which now causes problems with asynchronous data manipulation (e.

If you are writing a class, and your class implements the IEnumerable interface (generic (T) or derece) you're allowing any consumer of your class to iterate over its collection C# IStructuralComparable nerelerde kullanılıyor without knowing how it's structured.