Greatest Kılavuzu C# IEnumerable Nerelerde Kullanılıyor için

Greatest Kılavuzu C# IEnumerable Nerelerde Kullanılıyor için

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Veri akışı ve LINQ sorguları: IEnumerable, Language Integrated Query (LINQ) sorgularında münteşir olarak kullanılır. LINQ, done koleksiyonları üzerinde sorgulama ve filtreleme kabilinden meselelemleri kolaylaştırır ve başarımı artırır.

So when you have to simply iterate through the in-memory collection, use IEnumerable, if you need to do any manipulation with the collection like Dataset and other data sources, use IQueryable

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.

If on the second house, I decide to alter the price (say add one million dollars to the price) - the entire list would change (the order is now different). "one at a time" and "all of them right now" are two different things.

Normalde bilirsiniz ki bir metod birden bir araba return yapması imkansız ama return'ün başına yield koyduğumuzda ne oluyorda yapabiliyor?

I noticed that if I use "Distinct", the "inner" contains 6 items (this is incorrect birli only 2 are Distinct), but the "outer" does contain the correct values. Again, probably the delegated methods determine this but this is a bit more than I know about IEnumerable.

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

For small result sets this is likely to be a single trip, for large ones you're sending a request for more rows from the results, but it doesn't re-run the entire query.

The major difference between IQueryable C# IEnumerable Kullanımı and IEnumerable is that IQueryable executes query with filters whereas IEnumerable executes the query first and then it filters the veri based on conditions.

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k bronze badges 1 1 The mistake with "Reset" was with just having one type of enumerable. IMHO, there should have been an IMultipassEnumerable, inheriting IEnumerable, which would support Reset and guarantee that multiple passes will either return identical veri or throw an exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' veri if it's able to do so or throw an exception if it sevimli't, and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

It's for C# IEnumerable Nedir when you want to be able to use an object with a foreach loop, but you don't know exactly what type you're dealing with, whether Array, List, or something custom.

There's also the issues of deferred execution and unmanaged resources. IEnumerable takes use of the yield syntax, which mean you go over each item by-itself and sevimli perform all kinds of computations before and after. And C# IEnumerable Nerelerde Kullanılıyor again, this happens one-by-one, so you don't have to hold all the collection when you start. The computations won't actually be performed until the enumeration begins (i.e. until you run the foreach loop).

IEnumerable is an interface that defines one method GetEnumerator which returns C# IEnumerable Nedir an IEnumerator interface, this in turn allows readonly access to a collection. A collection that implements IEnumerable güç be used with a C# IEnumerable Nedir foreach statement.

Here is why it loads twice birli fewer items birli the first example on average. Let's say probability to find element at any position in the range of files is the same.