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  1. using System;
  2. using System.Globalization;
  3. using System.Linq;
  4. using System.Collections;
  5. using System.Collections.Generic;
  6.  
  7. public class Test
  8. {
  9. 	public static void Main()
  10. 	{
  11.         int[] numbers = {1,2,2,3,3,4,4,5};
  12. 		var allUniques = numbers.GroupBy(i => i)
  13. 		    .Where(group => !group.CountMoreThan(1))
  14. 		    .Select(group => group.Key).ToList();
  15.         foreach(int i in allUniques)
  16.             Console.WriteLine(i);
  17. 	}
  18. }
  19.  
  20. public static class Extensions
  21. {
  22. 	public static bool CountMoreThan<TSource>(this IEnumerable<TSource> source, int num)
  23. 	{
  24. 	    if (source == null)
  25. 	        throw new ArgumentNullException("source");
  26. 	    if (num < 0)
  27. 	        throw new ArgumentException("num must be grater or equal 0", "num");
  28.  
  29. 	    ICollection<TSource> collection = source as ICollection<TSource>;
  30. 	    if (collection != null)
  31. 	    {
  32. 	        return collection.Count > num;
  33. 	    }
  34. 	    ICollection collection2 = source as ICollection;
  35. 	    if (collection2 != null)
  36. 	    {
  37. 	        return collection2.Count > num;
  38. 	    }
  39.  
  40. 	    int count = 0;
  41. 	    using (IEnumerator<TSource> enumerator = source.GetEnumerator())
  42. 	    {
  43. 	        while (++count <= num + 1)
  44. 	            if (!enumerator.MoveNext())
  45. 	                return false;
  46. 	    }
  47. 	    return true;
  48. 	}	
  49. }
  50.  
Success #stdin #stdout 0.05s 34184KB
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https://ideone.com/vudNdj
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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