JS俄罗斯方块删除行问题

// 游戏区域的二维数组
var gameArea = [
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
];

// 删除填满的行
function deleteFullRows() {
  for (var i = gameArea.length - 1; i >= 0; i--) {
    var row = gameArea[i];
    if (row.every(function(cell) { return cell === 1; })) {
      gameArea.splice(i, 1);
      gameArea.unshift([0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);
    }
  }
}

// 示例调用
gameArea[9] = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1];
deleteFullRows();
console.log(gameArea);