在不移动元素的情况下对网格项目进行计数

function countProjects(grid) {
  var count = 0;
  for (var i = 0; i < grid.length; i++) {
    for (var j = 0; j < grid[i].length; j++) {
      if (grid[i][j] === "项目") {
        count++;
      }
    }
  }
  return count;
}

// 示例网格
var grid = [
  ["项目", "非项目", "项目"],
  ["项目", "项目", "非项目"],
  ["非项目", "非项目", "项目"]
];

var projectCount = countProjects(grid);
console.log("网格中的项目数量为：" + projectCount);