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function buttonClicked() { | |
var buttonClickedStream = Rx.Observable.just(null); | |
buttonClickedStream | |
.takeUntil(viewDismountedObservable) | |
.flatMap(getDataFromStorage) | |
.filter(checkIfdataMoreThanADayOld) | |
.flatMap(getNewData) | |
.map(performComplexOperations) | |
.subscribe((combinedData) => { | |
console.log(combinedData); | |
}, | |
(error) => { | |
console.log('An error occured'); | |
}); | |
} | |
function getDataFromStorage() { | |
var dataStream1 = Rx.Observable.fromPromise(AsyncStorage.getItem(KEY_1)); | |
var dataStream2 = Rx.Observable.fromPromise(AsyncStorage.getItem(KEY_2)); | |
var dataStream3 = Rx.Observable.fromPromise(AsyncStorage.getItem(KEY_3)); | |
return dataStream1 | |
.combineLatest( | |
dataStream2, | |
dataStream3, | |
(data1, data2, data3) => { | |
return { | |
data1: data1, | |
data2: data2, | |
data3: data3 | |
}; | |
}); | |
} | |
function checkIfdataMoreThanADayOld(combinedData) { | |
return combinedData.moreThanADayOld(); | |
} | |
function getNewData(combinedData) { | |
var newDataStream = Rx.Observable.fromPromise(fetch('www.example.com/newData')); | |
var oldDataStream = Rx.Observable.just(combinedData); | |
return newDataStream | |
.combineLatest( | |
oldDataStream, | |
(newData, oldData) => { | |
return { | |
newData: newData, | |
oldData: oldData | |
}; | |
}); | |
} | |
function performComplexOperations(combineApiAndLocalData) { | |
//Perform complex operations with combineApiAndLocalData | |
//... | |
//... | |
//More opeations | |
return 'Successfully updated old data'; | |
} |
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