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Diffstat (limited to 'DSALib/Auxiliary/SpellCorrect.cs')
| -rw-r--r-- | DSALib/Auxiliary/SpellCorrect.cs | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/DSALib/Auxiliary/SpellCorrect.cs b/DSALib/Auxiliary/SpellCorrect.cs deleted file mode 100644 index 79908c4..0000000 --- a/DSALib/Auxiliary/SpellCorrect.cs +++ /dev/null @@ -1,61 +0,0 @@ -using System; - -namespace DSALib.Auxiliary -{ - public class SpellCorrect - { - public const double ErrorThreshold = 1 / 3.0; - private const double Match = 3.0; - private const double Gap = -1.5; - private const double Mismatch = -2.0; - - public static double Compare(string s, string q) - { - s = s.ToLower(); - q = q.ToLower(); - - int i, j; - - var matrix = new double[s.Length + 1, q.Length + 1]; - var max = 0.0; - matrix[0, 0] = 0.0; - - for (i = 1; i < s.Length; i++) - matrix[i, 0] = i * Gap; - - for (i = 1; i < q.Length; i++) matrix[0, i] = 0.0; - - - for (i = 1; i <= s.Length; i++) - for (j = 1; j <= q.Length; j++) - { - double decay = j / (s.Length * 1000.0); - var add = s[i - 1] == q[j - 1] ? Match - decay : Mismatch; - var score = matrix[i - 1, j - 1] + add; - - if (score < matrix[i - 1, j] + Gap) score = matrix[i - 1, j] + Gap; - - if (score < matrix[i, j - 1] + Gap) score = matrix[i, j - 1] + Gap; - - if (i > 1 && j > 1) - if (s[i - 1] == q[j - 2] && s[i - 2] == q[j - 1]) - { - add = 3 / 2.0 * Match - decay; - if (score < matrix[i - 2, j - 2] + add) score = matrix[i - 2, j - 2] + add; - } - - if (max < score && i == s.Length) max = score; - - matrix[i, j] = score; - } - - return max; - } - - public static bool IsMatch(string s1, string s2) - { - var score = Compare(s1, s2); - return score > ErrorThreshold * s1.Length; - } - } -}
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