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  1. using System;
  2. using System.Linq;
  3. using System.Collections.Generic;
  4.  
  5. public class Test
  6. {
  7. 	public static void Main() {
  8. 		var dict = new Dictionary<string,List<int>>();
  9. 		dict.Insert("x", 1);
  10. 		dict.Insert("x", 2);
  11. 		dict.Insert("x", 3);
  12. 		dict.Insert("y", 4);
  13. 		dict.Insert("y", 5);
  14. 		foreach (var p in dict) {
  15. 			Console.WriteLine("{0} - {1}", p.Key, string.Join(", ", p.Value.ToArray()));
  16. 		}
  17. 	}
  18. }
  19.  
  20. static class DictExtensions {
  21. 	public static void Insert<TKey,TVal>(this IDictionary<TKey,List<TVal>> d, TKey k, TVal v) {
  22. 		List<TVal> current;
  23. 		if (!d.TryGetValue(k, out current)) {
  24. 			d.Add(k, new List<TVal> { v } );
  25. 		} else {
  26. 			current.Add(v);
  27. 		}
  28. 	}
  29. }
Success #stdin #stdout 0.02s 15076KB
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stdin
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Standard input is empty
stdout
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x - 1, 2, 3
y - 4, 5
https://ideone.com/UNUWtz
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
public

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