public override bool Equals(object a_obj)
{
if (a_obj == null)
{
return(false);
}
if (ReferenceEquals(this, a_obj))
{
return(true);
}
SudokuBoard board = a_obj as SudokuBoard;
if (board == null)
{
return(false);
}
return(Cells().SequenceEqual(board.Cells()));
}
private static SudokuBoard LoadFromText(string a_str)
{
a_str = a_str.Replace(System.Environment.NewLine, System.Environment.NewLine.Substring(0, 1));
List <string> lines = a_str.Split(System.Environment.NewLine[0]).ToList();
for (int i = lines.Count - 1; i >= 0; i--)
{
lines[i] = lines[i].Replace(" ", "");
if (lines[i].IndexOfAny(new char[] { ']', '[', '-', '+', '*' }) != -1)
{
lines.RemoveAt(i);
}
else if (lines[i].Length == 0)
{
lines.RemoveAt(i);
}
}
if (lines.Count == 1)
{
string str = lines[0];
if (str.Length == 9 * 9)
{
lines.Clear();
for (int i = 0; i < 9; i++)
{
lines.Add(str.Substring(i * 9, 9));
}
}
}
for (int i = lines.Count - 1; i >= 0; i--)
{
lines[i] = lines[i].Replace(" |", "");
lines[i] = lines[i].Replace("|", "");
lines[i] = lines[i].Replace(" ", ".");
}
for (int i = lines.Count - 1; i >= 0; i--)
{
if (lines[i].Length != SIZE)
{
lines.RemoveAt(i);
}
}
if (lines.Count != SIZE)
{
return(null);
}
SudokuBoard board = new SudokuBoard();
(from cell in board.Cells()
where lines[cell.Row][cell.Col] != '.'
select cell).ForEach(cell =>
cell[Int32.Parse(new string(new char[] { lines[cell.Row][cell.Col] })) - 1].State =
SudokuNumberState.sudokucellstateManualEntered);
if (!board.Check())
{
return(null);
}
return(board);
}