findByCol method
Find item in a col
Implementation
List<ChessItem> findByCol(int col, [int? min, int? max]) {
List<ChessItem> items = [];
for (int i = min ?? 0; i <= (max ?? _rows.length - 1); i++) {
if (_rows[i][col] != '0') {
items.add(ChessItem(_rows[i][col], position: ChessPos(col, i)));
}
}
return items;
}