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  1. using System;
  2. using System.Collections.Generic;
  3. using System.IO;
  4. using System.Linq;
  5. using System.Text.RegularExpressions;
  6.  
  7. public class Test
  8. {
  9. 	public static void Main()
  10. 	{
  11.     		var s = "=StringOne&=StringTwo&=StringThree&=StringFour&";
  12.     		var idx = 2;     // Replace this occurrence
  13. 		var result = Regex.Replace(s, $@"^(=(?:[^=&]+&=){{{idx-1}}})[^=&]+", "${1}REPLACED");
  14.        		Console.WriteLine(result);
  15. 	}
  16. }
Success #stdin #stdout 0.03s 134720KB
comments (?)
stdin 
Standard input is empty
stdout 
=StringOne&=REPLACED&=StringThree&=StringFour&
https://ideone.com/eDuB4F
language:
C# (gmcs 5.20.1)
created:
6 years ago
visibility:
secret

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