Repositorio del curso CCOM4030 el semestre B91 del proyecto Artesanías con el Instituto de Cultura

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960
  1. import { Observable } from '../Observable';
  2. import { SchedulerLike } from '../types';
  3. /**
  4. * The same Observable instance returned by any call to {@link empty} without a
  5. * `scheduler`. It is preferrable to use this over `empty()`.
  6. */
  7. export declare const EMPTY: Observable<never>;
  8. /**
  9. * Creates an Observable that emits no items to the Observer and immediately
  10. * emits a complete notification.
  11. *
  12. * <span class="informal">Just emits 'complete', and nothing else.
  13. * </span>
  14. *
  15. * ![](empty.png)
  16. *
  17. * This static operator is useful for creating a simple Observable that only
  18. * emits the complete notification. It can be used for composing with other
  19. * Observables, such as in a {@link mergeMap}.
  20. *
  21. * ## Examples
  22. * ### Emit the number 7, then complete
  23. * ```ts
  24. * import { empty } from 'rxjs';
  25. * import { startWith } from 'rxjs/operators';
  26. *
  27. * const result = empty().pipe(startWith(7));
  28. * result.subscribe(x => console.log(x));
  29. * ```
  30. *
  31. * ### Map and flatten only odd numbers to the sequence 'a', 'b', 'c'
  32. * ```ts
  33. * import { empty, interval, of } from 'rxjs';
  34. * import { mergeMap } from 'rxjs/operators';
  35. *
  36. * const interval$ = interval(1000);
  37. * const result = interval$.pipe(
  38. * mergeMap(x => x % 2 === 1 ? of('a', 'b', 'c') : empty()),
  39. * );
  40. * result.subscribe(x => console.log(x));
  41. *
  42. * // Results in the following to the console:
  43. * // x is equal to the count on the interval eg(0,1,2,3,...)
  44. * // x will occur every 1000ms
  45. * // if x % 2 is equal to 1 print abc
  46. * // if x % 2 is not equal to 1 nothing will be output
  47. * ```
  48. *
  49. * @see {@link Observable}
  50. * @see {@link never}
  51. * @see {@link of}
  52. * @see {@link throwError}
  53. *
  54. * @param scheduler A {@link SchedulerLike} to use for scheduling
  55. * the emission of the complete notification.
  56. * @return An "empty" Observable: emits only the complete
  57. * notification.
  58. * @deprecated Deprecated in favor of using {@link EMPTY} constant, or {@link scheduled} (e.g. `scheduled([], scheduler)`)
  59. */
  60. export declare function empty(scheduler?: SchedulerLike): Observable<never>;