icecream-data-dependencies.js

from(iceCreamIds).pipe(
  withLatestFrom(
    iceCreamAuth$,
    iceCreamPreferences$,
    iceCreamVendors$,
    iceCreamInventory$,
    iceCreamTemperature$,
  ),
  map(([
    iceCreamId,
    iceCreamAuth,
    iceCreamPreferences,
    iceCreamVendor,
    iceCreamInventory,
    iceCreamTemperature
  ]) => {
    if (!iceCreamAuth) {
      return [];
    }
    return [iceCreamId, iceCreamVendor, combineInfo(
      iceCreamPreferences,
      iceCreamInventory,
      iceCreamTemperature
    )];
  }),
  map(([iceCreamId, iceCreamVendor, combinedInfo]) => {
    if (iceCreamVendor) {
      return [iceCreamId, combinedInfo];
    }
    return [];
  })
  // ...
);