Question

我是Angular的新手，我通过使用.map函数（在类外）来调用WebService（REST）。我自动得到一个对象“响应”，这很好。但是现在，如何将我的方法（和我的类）中的值发送到类外的函数？此值与WebService响应无关。

@Injectable()
export class MyClass {

  getEvents(myValue: string): Observable<CalendarEvent[]> {

    this.http
      .get("url of webservice")
      .map(mapEvents) <- how can I put "myValue" here
      .catch(handleError);
 }
}

function mapEvents(response: Response): CalendarEvent[] {
  return response.json().map(toEvent);
}

function toEvent(event: any): CalendarEvent {
  const s_event = <CalendarEvent>(
    {
      value : myValue;   <- to get "myValue" here? 
    });
  return s_event;
}

Answer 1

只需使用arrow function

@Injectable()
export class MyClass {

  getEvents(myValue: string): Observable<CalendarEvent[]> {

    this.http
      .get("url of webservice")
      .map(d => mapEvents(d, myValue)) <-  put "myValue" here
      .catch(handleError);
 }
}

function mapEvents(response: Response, myValue): CalendarEvent[] {
  return response.json().map(e => toEvent(e, myValue));
}

function toEvent(event: any, myValue): CalendarEvent {
  const s_event = <CalendarEvent>(
    {
      value : myValue;   <- to get "myValue" her !
    });
  return s_event;
}

如何将另一个值从“类”传递给“函数”

1 个答案: