Example #1
0
  private int editDistance_r(char[] X, char[] Y, int m, int n) {
    if (m == 0 && n == 0) {
      return 0;
    }

    if (m == 0) {
      return n;
    }

    if (n == 0) {
      return m;
    }

    if (X[m - 1] != Y[n - 1]) {
      return Util.min(
          1 + editDistance_r(X, Y, m - 1, n),
          1 + editDistance_r(X, Y, m, n - 1),
          1 + editDistance_r(X, Y, m - 1, n - 1));
    } else {
      return editDistance_r(X, Y, m - 1, n - 1);
    }
  }
Example #2
0
  private int editDistance(char[] X, char[] Y, int m, int n) {
    int[][] table = new int[m + 1][n + 1];

    table[0][0] = 0;

    for (int i = 0; i <= m; i++) {
      table[i][0] = i;
    }

    for (int i = 0; i <= n; i++) {
      table[0][i] = i;
    }

    for (int i = 1; i <= m; i++) {
      for (int j = 1; j <= n; j++) {
        if (X[i - 1] != Y[j - 1]) {
          table[i][j] = Util.min(table[i - 1][j] + 1, table[i][j - 1] + 1, table[i - 1][j - 1] + 1);
        } else {
          table[i][j] = table[i - 1][j - 1];
        }
      }
    }
    return table[m][n];
  }