title: Rxjs Observable.take(1) vs Subscription.unsubscribe()
body: <p>Is there any differences between </p>
  
  <pre><code>Observable.pipe(take(1)).subscribe(...)
  </code></pre>
  
  <p>vs </p>
  
  <pre><code>const subscription = Observable.subscribe(() =&gt; {
     // Do something, then
     subscription.unsubscribe()
  })
  </code></pre>