to2D static method
Returns a copy of the provided sudoku
as a 2 Dimensional List which
is the standard format.
InvalidSudokuConfigurationException is thrown if the configuration of
the sudoku
is not valid.
Implementation
static List<List<int>> to2D(List<int> sudoku) {
var sudoku2D = List.generate(9, (i) => List.generate(9, (j) => 0));
var index = 0;
try {
for (var i = 0; i < 9; i++) {
for (var j = 0; j < 9; j++) {
sudoku2D[i][j] = sudoku[index];
index++;
}
}
} on RangeError {
throw InvalidSudokuConfigurationException();
}
if (!isValidConfiguration(sudoku2D)) {
throw InvalidSudokuConfigurationException();
}
return sudoku2D;
}