Interview: retry() flaky API

The source fails the first two attempts. With retry(2), get ok-3.

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const { defer, throwError, of, retry } = Rx;

let attempts = 0;
const api$ = defer(() => {
  attempts += 1;
  return attempts < 3 ? throwError(() => new Error('fail')) : of('ok-' + attempts);
});

const result$ = api$.pipe(
  retry(2)
);

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

script.ts // TypeScript

CONSOLE · Console output

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