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  1. using System;
  2. using System.Collections.Generic;
  3. using System.IO;
  4. using System.Text.RegularExpressions;
  5. using System.Linq;
  6. public class Test
  7. {
  8. 	public static void Main()
  9. 	{
  10. 		var lst = new List<string> {"3.AAA", "AAA.BBB", "AAA.3.BBB", "AAA.3.B555B", "AAA.3.BBB.4", 
  11. 			"AAA.3.BBB.4.CCC", "AAA.3.BBB.CCC", "AAA.3.BBB.CCC.4", "AAA.3.BBB.CCC.4.DDD",
  12. 			"ZZZ.AAA.3.BBB","ZZZ.AAA.3.BBB.4","ZZZ.AAA.3.BBB.4.CCC", "ZZZ.AAA.3.BBB.CCC",
  13. 			"ZZZ.AAA.3.BBB.CCC.4", "ZZZ.AAA.3.BBB.CCC.4.DDD"};
  14. 		var rx = new Regex(@"^(?:(?!\d+\.)[^\s.]+\.)+\d+(?:\.(?!\d+(?=\.|$))[^\s.]+)+$", 
  15. 			RegexOptions.Compiled | RegexOptions.ECMAScript);
  16. 		foreach (var s in lst) 
  17. 		{
  18. 			if (rx.IsMatch(s))
  19. 				Console.WriteLine(s);
  20. 		}
  21. 	}
  22.  
  23.  
  24. }
  25.  
  26.  
Success #stdin #stdout 0.04s 19516KB
comments (?)
stdin 
Standard input is empty
stdout 
AAA.3.BBB
AAA.3.B555B
AAA.3.BBB.CCC
ZZZ.AAA.3.BBB
ZZZ.AAA.3.BBB.CCC
https://ideone.com/OsVG5t
language:
C# (gmcs 5.20.1)
created:
6 years ago
visibility:
public

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