En iyi Tarafı C# IEnumerable Temel Özellikleri

En iyi Tarafı C# IEnumerable Temel Özellikleri

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Kakım mentioned by Mr. Copsey, this saf the benefit of providing decoupling from the implementation, but I'm of the contention that a clear definition of the smallest subset of interface functionality bey possible (i.

Anything in .NET that you dirilik iterate over implements IEnumerable. If you're building your own class, and it doesn't already inherit from a class that implements IEnumerable, you hayat make your class usable in foreach statements by implementing IEnumerable (and by creating an enumerator class that its new GetEnumerator method will return).

This where filter is executed on the client side where the IEnumerable code is. In other words all the data is fetched from the database and then at the client its scans and gets the record with EmpId is 2.

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

To get them I use VisualTreeHelper class. But I have to consider that there might be A LOT OF children so copying to some array or Collection will by expensive. – drasto 5 mins ago

So if you working with only in-memory data collection IEnumerable is a good choice but if you want to query data collection which is connected with database `IQueryable is a better choice birli it reduces network traffic and uses the power of SQL language.

While it might seem that only array types dirilik make use of this construct, the truth of the matter is

The constructor is derece responsible for returning data to the caller. 2-We need to C# IStructuralComparable Temel Özellikleri call C# IStructuralComparable Nasıl kullanılır a method that returns the cars array. That is in a real-world case, a method that returns an array should be coded in Garage and it should return an array, in which case, there would be C# IStructuralComparable Nasıl kullanılır no need to use IEnumerable.

So you have a common IEnumerator-implementing class for all ten, and each collection just özgü to implement IEnumerable using that enumerating class. It's C# IEnumerable Temel Özellikleri about separation of concerns, treating holding veri and enumerating veri bey separate operations.

In a yetişek, it may be better to defer converting your query to a list until the very end, so if I'm going to enumerate through Leopards and Hyenas more than once, I'd do this:

This takes an IEnumerator factory function, which usually yaşama be provided very easily instead of the single IEnumerator instance (which yields wrong results after first iteration and breaks the semantics of IEnumerable). This avoids the issues marked by Marc Gravell and establishes full IEnumerable behavior.

Ya hoca, onca yazdın çizdin anladıkta iki satır IEnumerable yahut IEnumerator interfacelerini kullanmadın?

On the flip side, it is usually best to declare a method’s return type by using the strongest type possible (trying not to commit yourself to a specific type). Share Follow

In addition to C# IStructuralComparable nedir all the answers posted above, here is my two cents. There are many other types other than List that implements IEnumerable such ICollection, ArrayList etc.