カスタム比較デリゲートと正規表現を使用した並べ替えは次のとおりです。
string[] array = { "RS01", "RS10", "RS32A", "RS102",
"RS80", "RS05A", "RS105A", "RS105B" };
Array.Sort(array, (s1, s2) =>
{
Regex regex = new Regex(@"([a-zA-Z]+)(\d+)([a-zA-Z]*)");
var match1 = regex.Match(s1);
var match2 = regex.Match(s2);
// prefix
int result = match1.Groups[1].Value.CompareTo(match2.Groups[1].Value);
if (result != 0)
return result;
// number
result = Int32.Parse(match1.Groups[2].Value)
.CompareTo(Int32.Parse(match2.Groups[2].Value));
if (result != 0)
return result;
// suffix
return match1.Groups[3].Value.CompareTo(match2.Groups[3].Value);
});
更新 (少しリファクタリングし、すべてのものを別の比較クラスに移動します)。使用法:
Array.Sort(array, new RSComparer());
比較者自体:
public class RSComparer : IComparer<string>
{
private Dictionary<string, RS> entries = new Dictionary<string, RS>();
public int Compare(string x, string y)
{
if (!entries.ContainsKey(x))
entries.Add(x, new RS(x));
if (!entries.ContainsKey(y))
entries.Add(y, new RS(y));
return entries[x].CompareTo(entries[y]);
}
private class RS : IComparable
{
public RS(string value)
{
Regex regex = new Regex(@"([A-Z]+)(\d+)([A-Z]*)");
var match = regex.Match(value);
Prefix = match.Groups[1].Value;
Number = Int32.Parse(match.Groups[2].Value);
Suffix = match.Groups[3].Value;
}
public string Prefix { get; private set; }
public int Number { get; private set; }
public string Suffix { get; private set; }
public int CompareTo(object obj)
{
RS rs = (RS)obj;
int result = Prefix.CompareTo(rs.Prefix);
if (result != 0)
return result;
result = Number.CompareTo(rs.Number);
if (result != null)
return result;
return Suffix.CompareTo(rs.Suffix);
}
}
}