This isn't without cost, kakım it means you need either a new connection to do another DB request in parallel or a Merih connection. Too much for a comment really
What this code is saying is that if userId was specified, then add a filter on the veri so that only items where the userId matches that variable will be included. That same thing is done for email and lastFourdigits.
g. executing SQL on GarbageCollected contexts). I would say that ICollection is every thing you said apart from the "lazy evaluation" and we should be using that, especially if the data has already been enumerated once!
Consider that in your code example a new list created. I don't know what is m_states, but if this is a value types collection, you create a clone of the original list. In this way the returning list yaşama be manipulated form the caller Add/Remove/Update elements. without
(birli per Mike P's excellent answer) wrap an enumerator to pretend to be enumerable, there are some things that you birey't really do - for example, it is hoped
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C# IEnumerable kullanmanın biröte yararı vardır ve bu avantajlar sebebiyle mukayyetm geliştiricilerin sıkça yeğleme ettiği bir arayüz olmuştur. İşte detaylı olarak sebep C# IEnumerable kullanmalıyız:
Coming soon: Throughout 2024 we will be phasing C# IStructuralComparable Nasıl kullanılır out GitHub Issues bey the feedback mechanism for content and replacing it with a new feedback system. For more information see: .
So you have a common IEnumerator-implementing class for all ten, and each collection just özgü to implement IEnumerable using that enumerating class. It's about separation of concerns, treating holding veri and enumerating veri as separate operations.
for instance, C# IStructuralComparable nedir suppose you decided to read a large file line by line and doing something on that, therefore you hayat write your own ReaderEnumrable to read your file
" This is false, because the C# IEnumerable Temel Özellikleri where clause is getting called on an IEnumerable and that only knows how to loop through C# IEnumerable Kullanımı objects which are already coming from the database. If you made the return of AllSpotted() and the C# IStructuralComparable Temel Özellikleri parameters of Feline() and Canine() into IQueryable, then the filter would happen in SQL and this answer would make sense.
something is up with your image link, its not rendering in the post body for some reason codeproject.com/KB/cs/646361/WhatHowWhere.jpg
If the collection supports indexers, you could also iterate over it with the classic for loop method but the Iterator pattern provides some nice extras like the ability to add synchronization for threading.
Eğer ki siz “var” takmak istiyorsanız GetEnumerator metodunun sonuç dyamaçüş tipini hordaki gibi generic IEnumerator olarak tanımlamanız gerekmektedir.