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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 strs = new[] { "aaa bbbb; Name=John Lewis; ccc ddd; Age=20;", "AAA bbbb; Age=21;", "Irrelevant", "My Name=Wiktor; no more data" };
  12.     	var pattern = @"(?:\bName=(?<Name>[^;]+).*?;\s+)?(?:\bAge=(?<Age>\d+))?";
  13.     	foreach (var str in strs) 
  14.     	{
  15.     		var results = Regex.Matches(str, pattern)
  16.     			.Cast<Match>()
  17.     			.Where(m => m.Groups["Name"].Success || m.Groups["Age"].Success)
  18.     			.Select(p => new {key=p.Groups["Name"].Value, val=p.Groups["Age"].Value} )
  19.     			.ToList();
  20.     		foreach (var r in results)
  21.     		{
  22.     			Console.WriteLine("Name: \"{0}\", Age: \"{1}\"", r.key, r.val);
  23.     		}
  24.     	}
  25. 	}
  26. }
Success #stdin #stdout 0.04s 30504KB
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stdin
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Standard input is empty
stdout
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Name: "John Lewis", Age: ""
Name: "", Age: "20"
Name: "", Age: "21"
Name: "Wiktor", Age: ""
https://ideone.com/1ip4Ct
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
secret

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