js [ { "18900": [ { "memory": 4.06, "hardDisk": 12.9, "cpu": 16.67, "time": "2023-05-24 10:10:00" }, { "memory": 1.14, "hardDisk": 12.9, "cpu": 13.95, "time": "2023-05-21 18:10:00" }, { "memory": 3.87, "hardDisk": 12.9, "cpu": 11.9, "time": "2023-05-21 17:00:00" }, { "memory": 9.92, "hardDisk": 17.7, "cpu": 17.68, "time": "2023-05-19 17:00:00" } ], "19000": [ { "memory": 2.2, "hardDisk": 17.7, "cpu": 25, "time": "2023-05-24 10:10:00" }, { "memory": 1.53, "hardDisk": 15.8, "cpu": 4.76, "time": "2023-05-21 16:40:00" }, { "memory": 1.91, "hardDisk": 15.8, "cpu": 4.88, "time": "2023-05-21 16:30:00" }, { "memory": 1.79, "hardDisk": 15.8, "cpu": 8.54, "time": "2023-05-21 16:00:00" } ] } ]在不知道有多少端口情况下 这是怎么使用for循环 把对应字段放在同一数组中不同的端口号则分成不同数组

可以先将数据转换为对象形式，然后使用for-in循环遍历端口号，再使用for循环遍历每个端口号对应的数据，将相应的字段放入同一数组中。具体代码如下：

const data = [ {"18900": [ {"memory": 4.06, "hardDisk": 12.9, "cpu": 16.67, "time": "2023-05-24 10:10:00" }, {"memory": 1.14, "hardDisk": 12.9, "cpu": 13.95, "time": "2023-05-21 18:10:00" }, {"memory": 3.87, "hardDisk": 12.9, "cpu": 11.9, "time": "2023-05-21 17:00:00" }, {"memory": 9.92, "hardDisk": 17.7, "cpu": 17.68, "time": "2023-05-19 17:00:00" } ] }, {"19000": [ {"memory": 2.2, "hardDisk": 17.7, "cpu": 25, "time": "2023-05-24 10:10:00" }, {"memory": 1.53, "hardDisk": 15.8, "cpu": 4.76, "time": "2023-05-21 16:40:00" }, {"memory": 1.91, "hardDisk": 15.8, "cpu": 4.88, "time": "2023-05-21 16:30:00" }, {"memory": 1.79, "hardDisk": 15.8, "cpu": 8.54, "time": "2023-05-21 16:00:00" } ] }];

const objData = {};

// 将数据转换为对象形式
data.forEach((item) => {
  Object.assign(objData, item);
});

// 遍历端口号
for (const port in objData) {
  const dataArray = [];
  // 遍历对应端口号的数据
  for (const dataItem of objData[port]) {
    const { memory, hardDisk, cpu, time } = dataItem;
    dataArray.push({ memory, hardDisk, cpu, time });
  }
  console.log(`port ${port}:`, dataArray);
}

运行结果如下：

port 18900: [ { memory: 4.06, hardDisk: 12.9, cpu: 16.67, time: '2023-05-24 10:10:00' }, { memory: 1.14, hardDisk: 12.9, cpu: 13.95, time: '2023-05-21 18:10:00' }, { memory: 3.87, hardDisk: 12.9, cpu: 11.9, time: '2023-05-21 17:00:00' }, { memory: 9.92, hardDisk: 17.7, cpu: 17.68, time: '2023-05-19 17:00:00' } ]
port 19000: [ { memory: 2.2, hardDisk: 17.7, cpu: 25, time: '2023-05-24 10:10:00' }, { memory: 1.53, hardDisk: 15.8, cpu: 4.76, time: '2023-05-21 16:40:00' }, { memory: 1.91, hardDisk: 15.8, cpu: 4.88, time: '2023-05-21 16:30:00' }, { memory: 1.79, hardDisk: 15.8, cpu: 8.54, time: '2023-05-21 16:00:00' } ]