如何 select 列表中的特定项目 Flutter/Dart

Question

我有一个动态列表，如下所示...我想创建另一个列表，其中只有“开始”日期，我该怎么做？？？

"bookings": [
            {
                "reference": "G1TVTZYSXZRHIIINN888",
                "station": "G61703000566",
                "connector": 0,
                "start": "2021-07-22T17:00:00.000+00:00",
                "stop": "2021-07-22T18:00:00.000+00:00",
                "card": "D2E3422B",
                "status": "Expired"
            },
            {
                "reference": "VD2MQO39CQ1PSHMUDIHT",
                "station": "G61703000567",
                "connector": 1,
                "start": "2021-07-22T18:00:00.000+00:00",
                "stop": "2021-07-22T19:00:00.000+00:00",
                "card": "D2E3422B",
                "status": "Expired"
            },
            {
                "reference": "EPQ05Q8DAHCOVNXMQCM3",
                "station": "G61703000567",
                "connector": 1,
                "start": "2021-07-22T20:00:00.000+00:00",
                "stop": "2021-07-22T21:00:00.000+00:00",
                "card": "D2E3422B",
                "status": "Expired"
            }...

Answer 1

Map 在您的 json 上并返回起始值

var data = jsonData["bookings"].map((e) => e["start"]).toList();

Answer 2

尝试 List.map 和 map 开始键，然后调用 toList() 方法