Rx

• Publish, Behavior, Replay

• CombineLatest - qualquer valor que emitar ele irá acionar, já ForkJoin todos precisão emitir

combineLatest(...)

runs observables in parallel, emitting a value each time an observable emits a value after all observables have emitted at least one value.

forkJoin(...)

runs observables in parallel, and emits a single value once all observables have completed.