title: Can I remove .subscribe() from map by using another RxJS operator?
body: <p>Is there an alternative to doing .subscribe() in map?</p>
  <pre><code>return this.http.patch&lt;any&gt;(URL, { test: true }).pipe(
      tap(_ =&gt; this.nextSomething$.next({})),
      filter(_ =&gt; this.filter),
      map(resp =&gt; {
        this.someObservable({ message: 'do' }).subscribe()
        return resp
      })
  )
  </code></pre>
  <p>I tried doing switchMap and returning the previous response but my observable does not complete.</p>
  <pre><code>switchMap(prevResp =&gt; 
    this.someObservable({ message: 'do' }) }).pipe(map( _ =&gt; prevResp))
  )
  
  </code></pre>
  <p>Thank you</p>