js 多层循环 break

const matrix = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9]
];
let found = false;

for (let i = 0; i < matrix.length && !found; i++) {
  for (let j = 0; j < matrix[i].length; j++) {
    if (matrix[i][j] === 5) {
      console.log(`Found at position (${i}, ${j})`);
      found = true;
      break; // 这个 break 只会跳出内层循环
    }
  }
}

let found = false;

for (let i = 0; i < matrix.length && !found; i++) {
  for (let j = 0; j < matrix[i].length; j++) {
    if (matrix[i][j] === 5) {
      console.log(`Found at position (${i}, ${j})`);
      found = true;
      break;
    }
  }
}

function findElement(matrix, target) {
  for (let i = 0; i < matrix.length; i++) {
    for (let j = 0; j < matrix[i].length; j++) {
      if (matrix[i][j] === target) {
        console.log(`Found at position (${i}, ${j})`);
        return; // 直接退出函数，终止所有循环
      }
    }
  }
}

findElement(matrix, 5);

matrix.some(row => row.some(element => {
  if (element === 5) {
    console.log(`Found element 5`);
    return true; // 这将终止外层的 some 循环
  }
  return false;
}));