Anonymous user
Run-length encoding: Difference between revisions
→{{header|C sharp|C#}}: alternate version with Regex
(+ blsq) |
(→{{header|C sharp|C#}}: alternate version with Regex) |
||
Line 654:
}
</lang>
Somewhat shorter, using Regex.Replace with MatchEvaluator (using C#2 syntax only):
<lang csharp>using System;
using System.Text.RegularExpressions;
public class Program
{
private delegate void fOk(bool ok, string message);
public static int Main(string[] args)
{
const string raw = "WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW";
const string code = "12W1B12W3B24W1B14W";
fOk Ok = delegate(bool ok, string message)
{
Console.WriteLine("{0}: {1}", ok ? "ok" : "not ok", message);
};
Ok(code.Equals(Encode(raw)), "Encode");
Ok(raw.Equals(Decode(code)), "Decode");
return 0;
}
public static string Encode(string input)
{
return Regex.Replace(input, @"(.)\1*", delegate(Match m)
{
return string.Concat(m.Value.Length, m.Groups[1].Value);
});
}
public static string Decode(string input)
{
return Regex.Replace(input, @"(\d+)(\D)", delegate(Match m)
{
return new string(m.Groups[2].Value[0], int.Parse(m.Groups[1].Value));
});
}
}</lang>
=={{header|Clojure}}==
| |||