如何从 JavaScript 中的多个数据中获取满足条件的数据(映射过滤器)

如何从多个数据中 Select 满足条件的数据.

I'm not good at using maps and filters. 如何从多个数据中 Select 满足条件的数据.

Shampledata

[
    {
        "dataList": [
            {
                "date": "2022-09-01T15:00:00Z",
                "friendsIds": []
            },
            {
                "date": "2022-09-02T15:00:00Z",
                "friendsIds": []
            },
            {
                "date": "2022-09-03T15:00:00Z",
                "friendsIds": []
            },
            {
                "date": "2022-09-04T15:00:00Z",
                "friendsIds": [
                    6
                ]
            },
            {
                "date": "2022-09-05T15:00:00Z",
                "friendsIds": [
                    7,8,10
                ]
            },
            {
                "date": "2022-09-06T15:00:00Z",
                "friendsIds": [
                    8
                ]
            },
            {
                "date": "2022-09-09T15:00:00Z",
                "friendsIds": [
                    9
                ]
            },
        ]
    }
]

我想要在朋友不空的时候得到第一次. 然而，获得了最后一次. 而且有一个类型错误.

  const sample = React.useMemo(() => {
    let arr[]:string[];
    Shampledata[0].dataList.map((list) => {
      if(list.friends.length > 0) {
        结果 = list.date;
        return 结果;
      }
    });
    return 结果;
  }, [Shampledata]);

　console.log(sample);

结果

2022-09-09T15:00:00Z

期望

2022-09-04T15:00:00Z