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  1. using System;
  2. using System.IO;
  3. using System.Text.RegularExpressions;
  4.  
  5. public class Test
  6. {
  7. 	public static void Main()
  8. 	{
  9. 		var str = "xx;;string;;;string;;string;;;;";
  10. 		var res = Regex.Replace(str, ";(?=;)", ";na");
  11.             	Console.WriteLine(res);
  12. 	}
  13. }
Success #stdin #stdout 0.03s 134720KB
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stdin
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Standard input is empty
stdout
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xx;na;string;na;na;string;na;string;na;na;na;
https://ideone.com/vQwvx8
language:
C# (gmcs 5.20.1)
created:
6 years ago
visibility:
secret

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