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  1. using System;
  2. using System.Linq;
  3.  
  4. public class Test
  5. {
  6. 	public static void Main()
  7. 	{
  8. 		var data = new string[] {"a", "b", "c", "d"};
  9. 		var triangle = Enumerable
  10. 		    .Range(1, data.Length)
  11. 		    .Select(row => data.Take(row).ToList())
  12. 		    .ToList();
  13. 		foreach (var r in triangle) {
  14. 			foreach (var c in r) {
  15. 				Console.Write("{0} ", c);
  16. 			}
  17. 			Console.WriteLine();
  18. 		}
  19. 	}
  20. }
Success #stdin #stdout 0.01s 131840KB
comments (?)
stdin 
Standard input is empty
stdout 
a 
a b 
a b c 
a b c d
https://ideone.com/BtPM2F
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
public

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