Question

我不敢在方法开始的时候宣布名单,然后又重新公布名单——我确信,有一些简短的返回声明,例如,为了节省额外代码(声明等)而可以写成,但我放弃。任何人都知道我指的是什么?

Answer 1

http://msdn.microsoft.com/en-us/library/9k7k7cf0.aspx” rel=“nofollow”yield

public IEnumerable<int> BuildList()
{
    yield return 1;
    yield return 2;
}

Answer 2

我认为,你正在寻找http://msdn.microsoft.com/en-us/library/9k7k7cf0.aspx” rel=“nofollow”yield Return。

你们只能用这种方式来回家:

public IEnumerable<T> GetElements()
{      
   foreach(T t in listOfT)
   {
       // do some work
       yield return t;
       //code will continue here on next iteration       
   }
}

be aware that often you can use linq or the extension methods to so some work on all the elements of a list without having to write a function with a loop. Like filtering the list for elements that satisfy to some condition or to perform an operation on all elements of a list.

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