如何在 Dart Flutter 中获取字典数组中某些键的值？

Question

我有一个字典数组，其中字典包含许多键值，我只希望一个键值在一个数组中我不想循环使用 for 循环抛出它我想要一些映射但我不知道为什么它会向我显示错误

所以这是一个例子

static final myDictionary = [
{
  "id": 1,
  "name": "Alex",
  "field_of_work": "HR",
  "description": ""
},
{
  "id": 2,
  "name": "Jack",
  "field_of_work": "CEO",
  "description": ""
},
{
  "id": 3,
  "name": "Eric",
  "field_of_work": "Worker",
  "description": ""
},
{
  "id": 4,
  "name": "Sam",
  "field_of_work": "Computer",
  "description": ""
},
{"id": 5, "name": "Michael", "field_of_work": "Others", "description": ""}
];

我希望我的列表是这样的

['Alex','Jack','Eric','Sam','Michael']

所以这是我写的代码但不起作用（实际上不编译）

myDictionary.asMap().values['name'].toList()

这是错误

The operator '[]' isn't defined for the type 'Iterable<Map<String, Object>>'.

尝试定义运算符“[]”

Answer 1

这样试试

 final List<String> namesList = myDictionary.map((e) => e["name"].toString()).toList();

如何在 Dart Flutter 中获取字典数组中某些键的值？

how to get values of the some keys in Array of Dictionary in Dart Flutter?

arrays

dictionary

iterable

dart

flutter