public static double Calculate(string startWord, string endWord, Cost cost)
{
var d = new double[startWord.Length + 1, endWord.Length + 1];
for (int i = 0; i <= startWord.Length; i++)
{
d[i, 0] = i * cost.Delete;
}
for (int j = 0; j <= endWord.Length; j++)
{
d[0, j] = j * cost.Insert;
}
for (int j = 1; j <= endWord.Length; j++)
{
for (int i = 1; i <= startWord.Length; i++)
{
if (startWord[i - 1] == endWord[j - 1])
{
d[i, j] = d[i - 1, j - 1];
}
else
{
d[i, j] = Math.Min(Math.Min(d[i - 1, j] + cost.Delete, d[i, j - 1] + cost.Insert), d[i - 1, j - 1] + cost.Replace);
}
}
}
return d[startWord.Length, endWord.Length];
}
private static void Main()
{
var cost = new Cost()
{
Replace = 1.0,
Delete = 0.9,
Insert = 0.8
};
var startWord = "developer";
var endWord = "enveloped";
Console.WriteLine("{0} -> {1} cost is {2}", startWord, endWord, LevenshteinDistance.Calculate(startWord, endWord, cost));
startWord = "developer";
endWord = "eveloper";
Console.WriteLine("{0} -> {1} cost is {2}", startWord, endWord, LevenshteinDistance.Calculate(startWord, endWord, cost));
startWord = "eveloper";
endWord = "enveloper";
Console.WriteLine("{0} -> {1} cost is {2}", startWord, endWord, LevenshteinDistance.Calculate(startWord, endWord, cost));
}