Düşünceler Hakkında Bilmek C# IEnumerable Nedir

Düşünceler Hakkında Bilmek C# IEnumerable Nedir

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So is it faster to use List over IEnumerable? Only if you want to prevent a query from being executed more than once. But is it better overall? Well in the above, Leopards and Hyenas get converted into single SQL queries each

If you tasavvur to build a public API, it's better to use IEnumerable than List, because you better use the most minimalistic interface/class. List lets you access objects by index if that's required.

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IEnumerable katışıksız just one method whereas IEnumerator katışıksız 2 methods (MoveNext and Reset) and a property Current. For easy understanding consider IEnumerable birli a box that contains IEnumerator inside it (though hamiş through inheritance or containment). See the code for better understanding:

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Ryan LundyRyan Lundy 208k4141 gold badges183183 silver badges214214 bronze badges 3 4 Then why do we need this IEnumerable abstraction, if the only thing C# IStructuralComparable Temel Özellikleri it does is just provide an access to Enumerator? Why don't just use Enumerator instead

The constructor is derece responsible for returning data to the C# IStructuralComparable Nasıl kullanılır caller. 2-We need to call 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 no need to use IEnumerable.

Else use an IEnumerable. The default should be to use the on-demand evaluation in the second example, birli that generally uses less memory, unless there is a specific reason to store the results in a list.

I do have one question though. In the first C# IStructuralComparable Temel Özellikleri example you loop over the array using foreach but then you cannot do it in the second example. Is this because the array is in a class or because it contains objects?

Does it bring the whole collection in memory? Or, does it instantiate the element one by one, bey it iterates over the foreach loop? thanks

Generally, don't worry about what's actually in the IEnumerables, C# IStructuralComparable Nasıl kullanılır birli it will be completely different from your actual code. Only worry about the actual output when you C# IStructuralComparable nerelerde kullanılıyor iterate over it :)

Bu interface, uygulandığı sınıfa GetEnumerator adlı bir metot kazanmıştırrır ve bu metot geriye IEnumerator interface’ini implement eden bir klas döndürür.

interface’i ise bir sınıfa foreach mekanizması tarafından tanılamanması dâhilin lüzumlu yetenekleri/nitelikleri kazanmıştırrır. Kısaca enumerator yapkaloriı… Şimdi elkızı bu iki interface yapısını detaylıca irdeleyerek, nasıl kullanıldıklarına değinelim.