Real-life: bufferCount() batch analytics

Group the analytics events into batches of 2.

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, bufferCount, map } = Rx;

const events = ['a', 'b', 'c', 'd', 'e'];

const result$ = from(events).pipe(
  bufferCount(2),
  map(batch => batch.join('+'))
);

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