What is the best way to create an Observable which directly emits after creation? : <p>I am asking myself what would be the most proper and semantically correct way to create an observable which emits directly after creation?</p>

<p>Of course I can always do something like this <code>of(unkown)</code>, <code>of(undefined)</code>, <code>of(null)</code>, <code>of(true)</code> and so on, but what would be the "correct" way to do this, is there any reference? </p>
