小编use*_*016的帖子

我试图从一个对象形成一个逗号分隔的字符串,

const data = {"Ticket-1.pdf":"8e6e8255-a6e9-4626-9606-4cd255055f71.pdf","Ticket-2.pdf":"106c3613-d976-4331-ab0c-d581576e7ca1.pdf"};
const values = Object.values(data).map(x => x.substr(0, x.length - 4));
const commaJoinedValues = values.join(',');
console.log(commaJoinedValues);

如何使用TypeScript执行此操作？

获取错误文件:

severity: 'Error'
message: 'Property 'values' does not exist on type 'ObjectConstructor'.'
at: '216,27'
source: 'ts'

我有一个json如下:

[{
  "_id": "58a58ea23744cd46918914ef",
  "entityId": "ce7200c1-3430-47ce-ab81-7d0622cb8cae",
  "name": "Portugal",
  "description": "Portugal",
  "type": "country",
  "category": "common",
  "subcategory": "common",
  "parent": {
    "_id": "58a8486ca4890027348a8966"
  },
  "image": {
    "_id": "58a8486ca4890027348a8965"
  },
  "metadata": {
    "primary": "pt",
    "taxRate": 20,
    "exchangeRate": 0.7,
    "language": "PT",
    "currency": "EUR",
    "_id": "58a8486ca4890027348a8964"
  }
}, {
  "_id": "58a58ea23744cd46918914f1",
  "entityId": "815b9e90-e36f-4488-ad50-6a259b6d034d",
  "name": "Qatar",
  "description": "Qatar",
  "type": "country",
  "category": "common",
  "subcategory": "common",
  "parent": {
    "_id": "58a8486ca4890027348a8969"
  },
  "image": {
    "_id": "58a8486ca4890027348a8968"
  },
  "metadata": {
    "primary": "qa",
    "taxRate": 20,
    "exchangeRate": 0.7,
    "language": "RO",
    "currency": "RO",
    "_id": …

这是我的XAML,在windows手机中,我使用MVVM将数据设置到页面,但我在列表框中找不到任何数据.

<ListBox Grid.Row="0"  SelectionMode="Single" SelectedItem="{Binding CurrentSelectedEmployee, Mode=TwoWay}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Vertical">
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{Binding FirstName}"></TextBlock>
                    <TextBlock Width="5"></TextBlock>
                    <TextBlock Text="{Binding LastName}"></TextBlock>
                </StackPanel>
                <TextBlock Text="{Binding Description}" TextWrapping="Wrap"></TextBlock>
            </StackPanel>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

而我的ViewModel,

 public MainViewModel()
        {
            Employees = new ObservableCollection<Model.Employee>();
        }

        public bool IsLoaded { get; set; }

        public void LoadData()
        {
            Employees = CompanyDataPhone.Service.EmployeeService.GetEmployees();
            IsLoaded = true;
        }
        //  public ObservableCollection<Model.Employee> Employees { get; set; }

        public ObservableCollection<CompanyDataPhone.Model.Employee> _employees;

        public ObservableCollection<CompanyDataPhone.Model.Employee> Employees
        {
            get {

                return _employees;
            }
            set
            {

                _employees …