GetEnumerator(); Örneğimizde bir “Personel” derslikı oluşturup, “Personeller” dershaneı içerisinde alakalı klasın koleksiyon yapkaloriı ve bu koleksiyona bilgi ekleme işlevini yapan Add metodunu teşhismladım. GetEnumerator metodu içinde ise koleksiyonumuzun GetEnumerator() metodu yardımıyla bir enumerator elde yazar return ettim.
Queue ve Stack: Queue ve Stack üzere bilgi bünyeları da IEnumerator kullanılarak elemanlarının sırasıyla veya aykırı sırasıyla alışverişlenmesi esenlanabilir.
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.
By adding on a Where statement you aren't actually doing much of anything, you're just adding an extra filter to the query so that later on, when you actually evaluate the sequence (in this case, when ToList is called) those filters will all be applied.
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
IEnumerable is a generic interface describing something that kişi be enumerated (you güç iterate through it and see/retrieve all of its elements). The content of this IEnumerable birey have been pre-generated, or is live/lazily generated C# IEnumerable Temel Özellikleri when you try to iterate through 'result' (IEnumerable).
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Where the execution will be performed out-of-process, the logic of the query has to be represented in veri such that the LINQ provider hayat convert it into the appropriate form for the C# IEnumerable Temel Özellikleri out-of-memory execution - whether that's an LDAP query, SQL or whatever.
This works for read-only access to a collection that implements that IEnumerable güç be used with C# IEnumerable Nasıl Kullanılır a foreach statement.
And that might be useful and more efficient in certain cases. For example, your C# IEnumerable Nasıl Kullanılır class might not hold any collection in memory, but rather C# IEnumerable Temel Özellikleri iterate over all files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable birey step in and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit of being able to use the object produced in a foreach loop).
Oluşturduğumuz constructor içinde params ile Calisan tipinde parametre girebileceğimi ve saykaloriın da muzlim bulunduğunu belirttik. Constructor içinde de gelen parametreyi property üzerine atadık.
IEnumerator kullanarak, koleksiyonun topu topunı belleğe yüklemeden, sadece lüzumlu elemanları alışverişler ve bu sayede belleğin etkin kullanılmasını esenlar.
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.