How can I reduce the number of loops, possibly into one loop on my solution below? The logic is right and it passes all my test cases but it looks a bit verbose. const hourglassSum = (arr) => { let count = 1; const hourglass = []; const flatglass = []; let idx = 0; do { const idx2 = idx + 1; const idx3 = idx + 2; hourglass. push([ [arr[0][idx], arr[0][idx2], arr[0][idx3]], [0, arr[1][idx2], 0], [arr[2][idx], arr[2][idx2], arr[2][idx3]], ]); idx += 1; count += 1; } while (count 4 && count 8 && count 12 && count { const flattened = [].concat(...innerglass); const arrSum = flattened. reduce((a, b) => a + b, 0); flatglass. push(arrSum); }); return Math. max(...flatglass); };