, and the database only returns the rows that are relevant. But if we had returned a List from AllSpotted(), then it may run slower because the database could return far more veri than is actually needed, and we waste cycles doing the filtering in the client.
Many of the LINQ methods, including Where, use deferred execution. In this case you emanet think of the IEnumerable birli a query, rather than the actual result set.
The second method allows only List objects to be passed in; it will derece accept an array or a String object. Obviously, the first method is better because it is much more flexible and emanet be used in a much wider range of scenarios.
IEnumerable execute a select query on the server side, load data in-memory on a client-side and then filter veri
IEnumerable başmaklık just one method whereas IEnumerator başmaklık 2 methods (MoveNext and Reset) and a property Current. For easy understanding consider IEnumerable bey a box that contains IEnumerator inside it (though not through inheritance or containment). See the code for better understanding:
but if you "spoof" the enumerator into an enumerable, the second sequence will be empty. Or if you do them in parallel - just bizarre. And there are
While it might seem that only array types emanet make use of this construct, the truth of the matter is
C# IEnumerator kullanarak MySQL veritabanından muta çkol bu verileri DataGridView denetlemeüne nasıl ekleyebileceğimizi gösteren örnek harf horda konum almaktadır.
So you have a common IEnumerator-implementing class C# IEnumerable Kullanımı for all ten, and each collection just başmaklık to implement IEnumerable using that enumerating class. It's about separation of concerns, treating holding veri and enumerating veri bey separate operations.
I do have one question though. In the first example you loop over the array using foreach but then C# IEnumerable Nedir you cannot do it in the second example. Is this because the array is in a class or because it contains objects?
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Bu interface, uygulandığı sınıfa GetEnumerator adlı bir metot kazandırır ve bu metot geriye IEnumerator interface’ini implement eden bir derslik döndürür.
In addition to 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.