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bento.me/temoki
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qiita.com/temoki/items/b
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👋͞Α͏ͳΒ3Y4XJGU ͷલʹ
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+40/"1*
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+40/"1*
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👋͞Α͏ͳΒ3Y4XJGU 4JOHMF
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3Y4XGJU4JOHMFˠ
import RxSwift
func fetchIssues()
-> Single<[Issue]> {
...
}
fetchIssues()
.map { issues in
issues.filter { $0.authorId == myId }
}
.subscribe(
onSuccess: { myIssues in
print(myIssues)
},
onFailure: { error in
print(error)
}
)
import Combine
func fetchIssues()
-> Future<[Issue], Error> {
...
}
fetchIssues()
.map { issues in
issues.filter { $0.authorId == myId }
}
.sink(
receiveCompletion: { completion in
switch completion {
case .finished:
print("finished")
case .failure(let error):
print(error)
}
},
receiveValue: { myIssues in
print(myIssues)
}
)
$PNCJOF'VUVSF
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3Y4XGJU4JOHMFˠ
import RxSwift
func fetchIssues()
-> Single<[Issue]> {
...
}
fetchIssues()
.map { issues in
issues.filter { $0.authorId == myId }
}
.subscribe(
onSuccess: { myIssues in
print(myIssues)
},
onFailure: { error in
print(error)
}
)
func fetchIssues() async throws
-> [Issue] {
...
}
do {
let issues = try await fetchIssues()
let myIssues = issues.filter {
$0.authorId == myId
}
print(myIssues)
} catch {
print(error)
}
BTZODBXBJU
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👋͞Α͏ͳΒ3Y4XJGU 0CTFSWBCMF
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3Y4XGJU0CTFSWBCMFˠ
import RxSwift
func issuesObservable()
-> Observable<[Issue]> {
...
}
issuesObservable()
.map { issues in
issues.filter { $0.authorId == myId }
}
.subscribe(
onNext: { myIssues in
print(myIssues)
},
onError: { error in
print(error)
},
onCompleted: {
print("completed")
}
)
import Combine
func issuesPublisher()
-> AnyPublisher<[Issue], Error> {
...
}
issuesPublisher()
.map { issues in
issues.filter { $0.authorId == myId }
}
.sink(
receiveCompletion: { completion in
switch completion {
case .finished:
print("finished")
case .failure(let error):
print(error)
}
},
receiveValue: { myIssues in
print(myIssues)
}
)
$PNCJOF1VCMJTIFS
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3Y4XGJU0CTFSWBCMFˠ
import RxSwift
func issuesObservable()
-> Observable<[Issue]> {
...
}
issuesObservable()
.map { issues in
issues.filter { $0.authorId == myId }
}
.subscribe(
onNext: { myIssues in
print(myIssues)
},
onError: { error in
print(error)
},
onCompleted: {
print("completed")
}
)
func issuesStream()
-> AsyncThrowingStream<[Issue], Error> {
...
}
do {
for try await myIssues in issuesStream()
.map({ issues in
issues.filter { $0.authorId == myId }
})
{
print(myIssues)
}
} catch {
print(error)
}
"TZOD4FRVFODF
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🤗͜Μʹͪ "TZOD4FRVFODF
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ࠓ͜ΕΛਪ͠ʹ͖ͨʂ
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🤗͜Μʹͪ"TZOD4FRVFODF
ඇಉظγʔέϯεͰγϯϓϧͳߏԽϓϩάϥϛϯά͕Ͱ͖Δ
func issuesStream() -> AsyncThrowingStream<[Issue], Error> { ... }
do {
for try await issues in issuesStream() {
let myIssues = issues.filter { $0.authorId == myId }
if myIssues.isEmpty {
print("No issues")
continue
}
print(myIssues)
}
} catch {
print(error)
}
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"TZOD4FRVFODFͷͭ͘Γ͔ͨᶃ
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struct IssuesIterator: AsyncIteratorProtocol {
typealias Element = [Issue]
mutating func next() async throws -> [Issue]? {
...
}
}
struct IssuesStream: AsyncSequence {
typealias AsyncIterator = IssuesIterator
typealias Element = [Issue]
func makeAsyncIterator() -> IssuesIterator {
...
}
}
let stream = IssuesStream()
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"TZOD4FRVFODFͷͭ͘Γ͔ͨᶄ
"TZOD4USFBN
"TZOD5ISPXJOH4USFBNͰ؆୯ʹ
import CloudFirestore
let stream = AsyncThrowingStream([Issue].self) { continuation in
let listener = Firestore.firestore().collection(“issues”)
.addSnapshotListener { snapshot, error in
if let error {
continuation.finish(throwing: error)
return
}
let issues = snapshot?.documents?.map(Issue.init) ?? []
continuation.yield(issues)
}
continuation.onTermination = { _ in
listener.remove()
}
}
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"TZOD4FRVFODFͷͭ͘Γ͔ͨᶅ
"TZOD4USFBNNBLF4USFBN
let (keywordStream, continuation) = AsyncStream.makeStream(of: String.self)
Task {
for await keyword in keywordStream {
print(keyword)
}
}
continuation.yield("keyword1")
continuation.yield("keyword2")
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👌
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🤗͜Μʹͪ "TZOD"MHPSJUINT
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BQQMFTXJGUBTZODBMHPSJUINT
https://github.com/apple/swift-async-algorithms
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BQQMFTXJGUBTZODBMHPSJUINT
https://github.com/apple/swift-async-algorithms
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·ͱΊ
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·ͱΊ
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