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Calculators.cs
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Calculators.cs
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using System;
using System.Collections.Generic;
using System.Text;
namespace Dx2_DiscordBot
{
public class Calculators
{
public static int EditDistance(string a, string b)
{
if (String.IsNullOrEmpty(a) && String.IsNullOrEmpty(b))
{
return 0;
}
if (String.IsNullOrEmpty(a))
{
return b.Length;
}
if (String.IsNullOrEmpty(b))
{
return a.Length;
}
int lengthA = a.Length;
int lengthB = b.Length;
var distances = new int[lengthA + 1, lengthB + 1];
for (int i = 0; i <= lengthA; distances[i, 0] = i++) ;
for (int j = 0; j <= lengthB; distances[0, j] = j++) ;
for (int i = 1; i <= lengthA; i++)
for (int j = 1; j <= lengthB; j++)
{
int cost = b[j - 1] == a[i - 1] ? 0 : 1;
distances[i, j] = Math.Min
(
Math.Min(distances[i - 1, j] + 1, distances[i, j - 1] + 1),
distances[i - 1, j - 1] + cost
);
}
return distances[lengthA, lengthB];
}
}
}