Real-life: pairwise() status transitions

Show the transitions between neighboring document statuses.

1. Solve the task in the editor — no long theory.
2. Run the check and compare your output with the expected result.
3. Stuck? Open the solution and carry the approach into your own code.

const { from, pairwise, map } = Rx;

const statuses = ['draft', 'review', 'published'];

const result$ = from(statuses).pipe(
  pairwise(),
  map(([from, to]) => from + '->' + to)
);

result$.subscribe(value => console.log(value));