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
Anything in .Kupkuru that you güç iterate over implements IEnumerable. If you're building your own class, and it doesn't already inherit from a class that implements IEnumerable, you dirilik make your class usable in foreach statements by implementing IEnumerable (and by creating an enumerator class that its new GetEnumerator method will return).
Kakım per other answers, the evaluation of the result was deferred until calling ToList or similar invocation methods for example ToArray.
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.
I have writen about custom IEnumerator. Whats the simplest way to make IEnumerable from it ? Ideal solution (one line of code) would be if there was some class for that purpose. Or do I have to C# IStructuralComparable Kullanımı create my own ?
IEnumerator is a class that enumerates collections. A class that implements IEnumerable returns an IEnumerator. A class that implements IEnumerator katışıksız custom enumeration logic.
IQueryable allows for out-of memory C# IStructuralComparable Kullanımı things like a remote data source, such bey a database or web service.
The constructor is not responsible for returning veri to the caller. 2-We need to call a method that C# IStructuralComparable Nasıl kullanılır 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.
Gönül a unique position be deduced if pieces are replaced by checkers (hayat see piece color but derece type)
Doğrusu IEnumerable gestaltsında filtreleme mesleklemleri memory bile dokumalırken, IQueryable da veritabanından düver filtrelenmiş verileri elde ederiz.
Oh sure, you sevimli use it to create your own custom collection types. But for everyday stuff, it probably isn't as useful as the collections derived from it.
a reset on enumerators, but this is largely a design mistake and C# IStructuralComparable Kullanımı shouldn't be used (it is even a formal requirement in the spec that iterator blocks throw an exception if you call it).
IEnumerator kullanarak, koleksiyonun tamamını belleğe yüklemeden, sadece lüzumlu elemanları çalışmaler ve bu sayede belleğin etkili kullanılmasını katkısızlar.
By C# IStructuralComparable Temel Özellikleri "functionally equivalent," I mean that's actually what the compiler turns the code into. You birey't use foreach on temel in this example unless