C# 讓 Dequeue 更方便的擴充方法

原始碼

1. void Main() 
2. { 
3.    var queue = new Queue<int>(); 
4.  
5.    for (int i = 0; i < 10; i++) { queue.Enqueue(i); } 
6.    string.Join(",", queue).Dump(); /* 0,1,2,3,4,5,6,7,8,9 */ 
7.  
8.  
9.    var take = queue.EnumerateDequeue().Take(4).ToList(); 
10.    string.Join(",", take).Dump(); /* 0,1,2,3 */ 
11.    string.Join(",", queue).Dump(); /* 4,5,6,7,8,9 */ 
12.  
13.  
14.    var take2 = queue.EnumerateDequeue().Take(40).ToList(); 
15.    string.Join(",", take2).Dump(); /* 4,5,6,7,8,9 */ 
16.    string.Join(",", queue).Dump(); /* */ 
17. } 
18.  
19.  
20.  
21. public static class QueueExtensions 
22. { 
23.  
24.   public static IEnumerable<T> EnumerateDequeue<T>(this Queue<T> source) 
25.   { 
26.       while (source.Count > 0) { yield return source.Dequeue(); } 
27.   } 
28.  
29.   public static IEnumerable<T> EnumerateDequeue<T>(this ConcurrentQueue<T> source) 
30.   { 
31.       T outValue; 
32.       while (source.TryDequeue(out outValue)) { yield return outValue; } 
33.   } 
34.  
35. } 

void Main()
{
    var queue = new Queue<int>();

    for (int i = 0; i < 10; i++) { queue.Enqueue(i); }
    string.Join(",", queue).Dump(); /* 0,1,2,3,4,5,6,7,8,9 */


    var take = queue.EnumerateDequeue().Take(4).ToList();
    string.Join(",", take).Dump(); /* 0,1,2,3 */
    string.Join(",", queue).Dump(); /* 4,5,6,7,8,9 */


    var take2 = queue.EnumerateDequeue().Take(40).ToList();
    string.Join(",", take2).Dump(); /* 4,5,6,7,8,9 */
    string.Join(",", queue).Dump(); /* */
}



public static class QueueExtensions
{

   public static IEnumerable<T> EnumerateDequeue<T>(this Queue<T> source)
   {
       while (source.Count > 0) { yield return source.Dequeue(); }
   }

   public static IEnumerable<T> EnumerateDequeue<T>(this ConcurrentQueue<T> source)
   {
       T outValue;
       while (source.TryDequeue(out outValue)) { yield return outValue; }
   }

}