Sudoku: Difference between revisions

Content added Content deleted

Inline

@@ Line 1,839: / Line 1,839: @@
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private static int RowCol(int rc) => rc <= 2 ? 0 : rc <= 5 ? 3 : 6;
-        private static IEnumerable<int> GetBox(int[][] grid, int row, int col) =>
+        private static IEnumerable<int> GetBox(this int[][] grid, int row, int col) =>
           from r in Range(RowCol(row), 3)
           from c in Range(RowCol(col), 3)
@@ Line 1,866: / Line 1,866: @@
            grid[row]
            .Union(domain.Select(r => grid[r][col]))
-           .Union(GetBox(grid, row, col))
+           .Union(grid.GetBox(row, col))
            .Except(Unmarked);