遍歷嵌套數組 object

Question

我正在嘗試遍歷嵌套數組 object ，如下所示。 訪問嵌套 arrays 中每個 object 元素的最佳方法是什么。

{
    "titleId": "111G",
    "aNumber": "1212",
    "data": [{
            "id": "6657",
            "name": "test name",
            "city": "LA",
            "state": "CA",
            "comment": "comment 1",
            "dates": [{
                    "startDate": "01/17/2020",
                    "endDate": "01/22/2020"
                },
                {
                    "startDate": "01/24/2020",
                    "endDate": "01/30/2020"
                }
            ]
        },
        {
            "id": "123",
            "name": "abc",
            "city": "NJ",
            "state": "NY",
            "comment": "comment 2",
            "dates": [{
                    "startDate": "01/17/2020",
                    "endDate": "01/22/2020"
                },
                {
                    "startDate": "01/24/2020",
                    "endDate": "01/30/2020"
                }
            ]
        }
    ]
}

我還需要訪問數據和日期數組中的每個元素

Answer 1

如果我正確理解了你想要迭代數據項中每個項目內的日期數組的問題，這就是我在 js 中的做法

var date = JSON.parse(res.data)

date.forEach(element => {
    var items =  element.dates
    items.forEach(current => {
        //do whatever 
    });
});

Answer 2

    const info = {
    "titleId": "111G",
    "aNumber": "1212",
    "data": [{
            "id": "6657",
            "name": "test name",
            "city": "LA",
            "state": "CA",
            "comment": "comment 1",
            "dates": [{
                    "startDate": "01/17/2020",
                    "endDate": "01/22/2020"
                },
                {
                    "startDate": "01/24/2020",
                    "endDate": "01/30/2020"
                }
            ]
        },
        {
            "id": "123",
            "name": "abc",
            "city": "NJ",
            "state": "NY",
            "comment": "comment 2",
            "dates": [{
                    "startDate": "01/17/2020",
                    "endDate": "01/22/2020"
                },
                {
                    "startDate": "01/24/2020",
                    "endDate": "01/30/2020"
                }
            ]
        }
    ]
}
info.data.forEach(city => city.dates.forEach(cityDate => console.log(cityDate.startDate)))