Observable in an Observable

So here we have a case of starting with values 1,2,3 and wanting those to lead up to an ajax call each

The reason for us NOT doing it like this with a operator

because we have created a list of observables, so three different streams. The operator however is able to flatten these three streams into one stream called a . There is however another interesting operator that we should be using when dealing with ajax generally and it’s called . Read more about it here Cascading calls