javascript - 在 ngOnInit 函数中将两个 json 合并为一个 json

Question

我有一个 Angular 组件，它在加载时调用 2 个服务方法，这些方法作为返回，以 json 格式返回数据。我想将这两个 json 合并在一起。我确实查看了其他一些线程，发现 Object.assign可用于此目的，但问题是我正在向订阅者函数和 Object.assign 内的对象添加数据。在订阅者函数之外，因此对象在订阅者函数之外是未定义的。这是我的代码

export class UpcomingClassesComponent implements OnInit {

  times: ClassTimes = new ClassTimes();
  schedule: ClassSchedule = new ClassSchedule();
    classes: any; 
    timing: any;
    data: any;

  constructor(private router:Router,
              private _classService: ClassServiceProxy) {

  }

  ngOnInit() {
    this._classService.GetClassData()
    .subscribe((result: any) => {
      this.schedule = result;
      this.classes = this.schedule;
      //console.log(this.classes);
    })

    this._classService.GetClassTimes()
    .subscribe((data: any) => {
      this.times = data;
      this.timing = this.times;
      //console.log(this.timing);
    })

    let completeData = Object.assign({}, this.classes, this.timing);
    console.log(completeData); 

    }

CompleteData在控制台中返回给我一个对象，没有别的

Answer 1

尝试 forkJoin

 forkJoin([_classService.GetClassTimes(),_classService.GetClassTimes()
  ]).subscribe((result: any[]) => {

    this.schedule = result[0];
    this.classes = this.schedule;

    this.times = result[1];
    this.timing = this.times;

   let completeData = {...this.classes, ...this.timing];
   console.log(completeData);
  })

https://stackblitz.com/edit/angular-2tyv93