Tumia async/await kwa kazi ya asynchronous ya risasi-moja yenye matokeo moja (network call, kusoma faili); tumia Combine (au AsyncSequence) kwa streams za thamani kwa muda — UI events, debounced search text, au updates zinazoendelea. Zinatatua maumbo tofauti ya tatizo, na code ya kisasa mara nyingi huzichanganya.
Task hukatiza watoto wake).map, debounce, combineLatest), na backpressure na composition ya declarative.// Combine: a live, transformed stream — perfect for search-as-you-type
searchText
.debounce(for: .milliseconds(300), scheduler: RunLoop.main) // wait for pause
.removeDuplicates()
.map { query in APIClient.search(query) } // -> Publisher
.switchToLatest() // cancel stale requests
.receive(on: RunLoop.main)
.assign(to: &$results)
// async/await: a single fetch — linear and readable
func loadDetail(id: Int) async throws -> Detail {
try await api.fetchDetail(id) // one value, then done
}
Huhitaji tena mfumo mzima wa Combine mara chache. AsyncSequence na for await hufunika kesi nyingi za streaming kwa asili, na unaweza kuunganisha: publisher.values huonyesha Combine publisher kama AsyncSequence.
for await value in publisher.values { // consume Combine stream with async/await
process(value)
}
debounce + combineLatest + switchToLatest), au unapounganisha na @Published na Combine code iliyopo.AnyCancellable.Kuchagua chombo kisicho sahihi husababisha Combine pipelines kwa calls rahisi za risasi-moja (overengineering) au state machines za mkono ambapo operator ya debounce ingetosha. Wahojaji wa senior wanataka kuona unavyolinganisha umbo la data — thamani moja dhidi ya stream — na abstraction sahihi, na kujua async/await sasa ni default.
Maktaba ya maswali ya mahojiano ya IT yenye majibu ya kina — kutoka Junior hadi Senior.
Changia