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  1. using System;
  2. using System.Text.RegularExpressions;
  3.  
  4. public class Test
  5. {
  6. 	public static void Main()
  7. 	{
  8. 		string str = "11&222&&333&&&44444&&&&55&&&&&";
  9. 		str = Regex.Replace(str, "&((?:(?<2>&)(?<-2>&)?)*)", "$1$2");
  10. 		Console.WriteLine(str);
  11. 	}
  12. }
Success #stdin #stdout 0.11s 24704KB
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stdin
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Standard input is empty
stdout
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11222&&333&&44444&&&&55&&&&
https://ideone.com/7f9CCb
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
secret

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