RxJS 1 array item into sequence of single items - operator

Question

Given such observable

Rx.Observable.of([1,2,3,4,5])

which emits a single item (that is an array), what is the operator

Answer 1

You can also use the flatMap operator (https://stackoverflow.com/a/32241743/3338239):

Observable.of([1, 2, 3, 4])
  .flatMap(x => x)
  .subscribe(x => console.log(x));
// output:
// 1
// 2
// 3
// 4