Finished

Test Name	Status
Can identify single saddle point	Pass
Can identify that empty matrix has no saddle points	Pass
Can identify lack of saddle points when there are none	Pass
Can identify multiple saddle points in a column	Pass
Can identify multiple saddle points in a row	Pass
Can identify saddle point in bottom right corner	Pass
Can identify saddle points in a non square matrix	Pass
Can identify that saddle points in a single column matrix are those with the minimum value	Pass
Can identify that saddle points in a single row matrix are those with the maximum value	Pass

 // convenience to get you started writing code faster.
 //
+export const saddlePoints = () => {
+  throw new Error('Remove this line and implement the function');
+export const saddlePoints = (grid) => {
+  // Edge Case: Empty grid
+  if (!grid || grid.length === 0) {
+    return [];
+  }
+  // Edge Case: Grid with empty rows
+  if (grid[0].length === 0) {
+    return [];
+  }
+  const numRows = grid.length;
+  const numCols = grid[0].length;
+  const saddlePoints = [];
+  // Precompute row maxima
+  const rowMax = new Array(numRows).fill(0);
+  for (let i = 0; i < numRows; i++) {
+    rowMax[i] = Math.max(...grid[i]);
+  }
+  // Precompute column minima
+  const colMin = new Array(numCols).fill(0);
+  for (let j = 0; j < numCols; j++) {
+    const column = grid.map(row => row[j]);
+    colMin[j] = Math.min(...column);
+  }
+  // Find saddle points
+  for (let i = 0; i < numRows; i++) {
+    for (let j = 0; j < numCols; j++) {
+      const value = grid[i][j];
+      if (value === rowMax[i] && value === colMin[j]) {
+        saddlePoints.push({ row: i + 1, column: j + 1 });
+      }
+    }
+  }
+  return saddlePoints;
 };
+// Handled Edge Cases: empty grid, grid with empty rows

Polyglot JavaScript