modify Observable in Angular and return new Observable with made changes-CodePudding

I have a this Observable

obs1$ = this.otherService.getObservable() which is of type number

I want to create a method which emits a Observable using the return value of this Observable


 combined() {
    this.currentLambdaReactorState$.subscribe((e) => {
      let dto = of([
        {
          name: 'foo',
          value: e,
        },
      ])
        return dto
    });
  }

so far this method does not return anything, how can I return a Observable from that method ?

CodePudding user response：

Map is what you want here.

// replace any with your type (returned from currentLambdaReactorState$)
combined(): Observable<{name: string, value: any}> {
  return this.currentLambdaReactorState$.pipe(
    // shorthand object literal return
    map((e)=> ({name: 'foo', value: e})) 
  )
}

// usage
combined().subscribe((mappedValue) => {
  console.log(mappedValue); // {name: 'foo', value: e}
});

CodePudding user response：

You can add return before this.currentLambdaReactorState$ and replace subscribe by map