[解決済み] rxjsのflatMap, mergeMap, switchMap, concatMap?

const { mergeMap, flatMap, concatMap, switchMap, exhaustMap } = Rx.operators;

const example = operator => () =>
  Rx.Observable.from([0,1,2,3,4])
  .pipe(
    operator(x => Rx.Observable.of(x).delay(500))
  )
  .subscribe(console.log, () => {}, () => console.log(`${operator.name} completed`));

const mm = example(mergeMap);
const fm = example(flatMap);
const cm = example(concatMap);    
const sm = example(switchMap);
const em = example(exhaustMap);

.examples > div {
  cursor: pointer;
  background-color: #4CAF50;
  color: white;
  padding: 7px 16px;
  display: inline-block;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/5.5.8/Rx.js"></script>

<div class='examples'>
  <div onClick='mm()'>mergeMap </div>
  <div onClick='fm()'>flatMap</div>
  <div onClick='cm()'>concatMap</div>
  <div onClick='sm()'>switchMap</div>
  <div onClick='em()'>exhaustMap</div>
</div>