Ne demek?

Ne demek?

Blog Article

If an airline is "countable", this means that there MUST be a flight attendant present on the plane, whose sole job is to count:

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

Different implementations of collections birey be enumerable; using IEnumerable makes it clear that what you're interested in is the enumerability, and not the structure of the underlying implementation of the collection.

Now List implements IEnumerable, but represents the entire collection in memory. If you have an IEnumerable and you call .ToList() you create a new list with the contents of the enumeration in memory.

Although there are uses of IEnumerable other than "foreach", the olağan indication that one should implement IEnumerable is that the class is one where it would make sense to say "foreach foo in classItem foo.do_something(); .

Why do many philosophers consider a past-eternal universe to be self-explanatory but derece a universe that began with no cause?

So the difference between IQueryable and IEnumerable is about where the filter logic is executed. One executes on the client side and the other executes on the database.

ServyServy 203k2727 gold badges342342 silver badges458458 bronze badges 1 @Jay thanks, just noticed that when re-reading.

What US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government?

Using the concept of iterators you güç achieve major improvement in algorithm quality, C# IEnumerable Temel Özellikleri both in terms of speed and memory usage.

It's for 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.

Important Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information C# IStructuralComparable nerelerde kullanılıyor provided here.

C# dilinde, IEnumerator özellikle aşağıdaki gibi koleksiyonlar üzerinde data okuma ve teamüllemlerinde yeğleme edilir:

When declaring a method’s parameter types, you should specify the weakest type possible, preferring interfaces over base classes. For example, if you are C# IStructuralComparable Temel Özellikleri writing a method that manipulates a collection of items, it would be best to declare the method’s parameter by using an C# IStructuralComparable Temel Özellikleri interface C# IEnumerable Nasıl Kullanılır such as IEnumerable rather than using a strong data type such bey List or even a stronger interface type such bey ICollection or IList: