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SWORD ART COMBINE

by yimajo

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SWORD ART COMBINE - ΞϦγθʔγϣϯ- iOS Functional Architecture ษڧձ 2020.10.25 @yiamjo

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͜ͷεϥΠυʹ͸2020೥य़Ն์ૹͷ ΞχϝSAOΞϦγθʔγϣϯฤͷ ωλόϨؚ͕·Ε·͢

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͋ͱͰݟΑ͏ͱࢥͬͯΔํ͸ ໨ΛͭΉ͍͔ͬͯͨͩ͘ ӾཡΛ͝தࢭ͍ͩ͘͞

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Ξχϝ൛͚ͩͰ͍͍ΜͰ·ͣSAOΛݟ ͔ͯΒ͜ͷࢿྉΛݟ͍ͯͩ͘͞

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ͪΌΜͱΞχϝ൛ݟ·ͨ͠ʁ ͋ɺ͍ͭͰʹ ͍ͭͰʹܶ৔൛΋͋ΔΜͰΞϦγθʔ γϣϯฤͷલʹݟ·ͨ͠ʁ

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͍͍ͬͨɺͳͥͦΜͳ͜ͱΛ…

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͍΍ɺࣗ෼ͷ޷͖ʹεϥΠυ࡞ͬͨ΄ ͏͕ḿΔ͔Β…

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ΞΫηϧϫʔϧυͷํ΋ݟͨ΄͏͕͍ ͍Ͱ͔͢ʁ

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ͳΔ΄Ͳ ΞΫηϧϫʔϧυͷํ͸ະࢹௌͰ͔· ͍·ͤΜ

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Ͱ͸͔͜͜Β͸ Ξχϝ൛SAO͓Αͼܶ৔Ξχϝ൛Λݟ ͨͱ͍͏͜ͱͰਐΊ·͢

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• લฤ: TCAͰ࢖ΘΕ͍ͯΔ pointfreeco/combine-schedulers • https://github.com/pointfreeco/combine-schedulers • RxSwiftͱͷൺֱ • ޙฤ: ͦ΋ͦ΋CombineͰͷSchedulerͷ໾ׂ΍ಈ࡞ • pointfreeco/combine-schedulers ͕Ͳ͏΍ͬͯΔͷ͔ ࠓ೔࿩͢͜ͱ

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TCAͰ࢖ΘΕ͍ͯΔ pointfreeco/combine-schedulers ʹ͍ͭͯ લ൒

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TCAͰ͸ReducerͷςετͰ࢖ΘΕΔ

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Reducerͷςετͷྫ ps://github.com/pointfreeco/swift-composable-architecture/blob/0.8.0/Examples/Search/Search/SearchView.swift Examples/Search/SearchView

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Reducerͷςετͷྫ ps://github.com/pointfreeco/swift-composable-architecture/blob/0.8.0/Examples/Search/Search/SearchView.swift https://github.com/pointfreeco/swift-composable-architecture/blob/0.8.0/Examples/Search/SearchTests/SearchTests.swif Examples/Search/SearchView

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೚ҙʹ࣌ؒΛਐΊɺ EffectΛଈ࣮࣌ߦ͍ͤͯ͞Δ

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Πϝʔδ: ಈըϓϨΠϠʔ

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Πϝʔδ: ಈըϓϨΠϠʔ

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࣍ʹԿ͕͋Δ͔ͱ͍͏ͷ͕Θ͔͍ͬͯͯɺ ͦͷλΠϛϯά·Ͱ࣌ؒΛਐΊΔ͜ͱ͕Ͱ͖ΔͷͰ ςετ࣮ߦ࣌ʹ࣮࣌ؒͷܦա͸ඞཁ͕ͳ͍ɻ Πϝʔδ: ಈըϓϨΠϠʔ

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ൺֱͷͨΊʹRxSwiftͷ࿩Λग़͢Αʂ

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RxSwift ͷ TestScheduler ͸ ࣌ؒΛԾ૝తʹѻ͏͜ͱͰ ςετίʔυΛಡΈ΍ͯ͘͢͠Δ

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ղ૾౓ͱ͍͏֓೦͕͋Δ • Ծ૝࣌ؒ = ݱ࣮࣌ؒ / ղ૾౓ • ۩ମྫʢղ૾౓Λ0.1ͱͨ͠৔߹ʣ • Ծ૝࣌ؒ10 = ݱ࣮࣌ؒ1ඵ / ղ૾౓0.1 • Ծ૝࣌ؒ3 = ݱ࣮࣌ؒ0.3 / ղ૾౓0.1 ςετΛ࣮ߦ͢ΔλΠϛϯάΛݱ࣮࣌ؒͰࢦఆ͢ΔͷͰ͸ͳ͘ɺ Ծ૝࣌ؒͰࢦఆ͢Δ͜ͱͰςετ࣮ߦΛݱ࣮࣌ؒʹґଘͤ͞ͳ͍Α͏ʹͰ͖͍ͯΔɻ

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ݱ࣮ͷ࣌ؒͰͪΜͨΒ࣮ߦΛ ଴ͭͷͰ͸ͳ͘ɺԾ૝࣌ؒͷதͰ ΠϕϯτΛॱ࣍ॲཧ͍ͯ͘͠… ʢRxSwift Ծ૝࣌ؒͷܦա͕࣮࣌ؒࡍʹͲ͏͍͏εϐʔυ͔͸෼͔Βͳ͍΋ͷͷʣ ͜Ε͸Կ͔ ͜͜Ζ͋ͨΓ͋Γ·͢ΑͶ….ʂ

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Πϝʔδ: SAO ΞϦγθʔγϣϯฤͷԾ૝ੈքʮΞϯμʔϫʔϧυʯ Ҿ༻: https://sao-alicization.net/ SAOݱ࣮ੈք SAOԾ૝ੈքʮΞϯμʔϫʔϧυʯ

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ݱ࣮ੈքͷ࣌ؒʹ͍ͨͯ͠ഒ཰Λ͔͚ΒΕͨ ࣌ؒʹΑͬͯՃ଎ͯ͠ੈքΛߏங͍ͯ͠Δ Πϝʔδ: SAO ΞϦγθʔγϣϯฤͷԾ૝ੈքʮΞϯμʔϫʔϧυʯ Ҿ༻: https://sao-alicization.net/ SAOݱ࣮ੈք SAOԾ૝ੈքʮΞϯμʔϫʔϧυʯ

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ͱ͍͏Θ͚Ͱ RxSwift ͱൺֱͭͭͦ͠ ͷҧ͍Λ੔ཧ͢Δͱ

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RxSwift ͷεέδϡʔϥ͸ SAO ΞϯμʔϫʔϧυతʹԾ૝࣌ؒͱͯ͠ѻ͏ɻ CombineScheduler ͸ ϝσΟΞϓϨΠϠʔతʹ࣌ؒΛ ੍ޚͯ͠ඈ͹͢ɻ

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༨ஊ

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SAO ݱ࣮ੈքͷهऀ SAO ݱ࣮ੈքʹϩϘମͰ࿈Εͯ͜ΒΕͨ ΞϯμʔϫʔϧυਓͷΞϦε͞Μ Ҿ༻: https://sao-alicization.net/

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-> هऀձݟ։͘ΜͳΒ಄֖։͍ͯAIͬͯূ໌ͯ͠ SAO ݱ࣮ੈքͷهऀ SAO ݱ࣮ੈքʹϩϘମͰ࿈Εͯ͜ΒΕͨ ΞϯμʔϫʔϧυਓͷΞϦε͞Μ Ҿ༻: https://sao-alicization.net/

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-> هऀձݟ։͘ΜͳΒ಄֖։͍ͯAIͬͯূ໌ͯ͠ ͡Ό͋ͦͬͪ΋಄֖։͍ͯਓؒͬͯূ໌ͯ͠ <- SAO ݱ࣮ੈքͷهऀ SAO ݱ࣮ੈքʹϩϘମͰ࿈Εͯ͜ΒΕͨ ΞϯμʔϫʔϧυਓͷΞϦε͞Μ Ҿ༻: https://sao-alicization.net/

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-> هऀձݟ։͘ΜͳΒ಄֖։͍ͯAIͬͯূ໌ͯ͠ ͡Ό͋ͦͬͪ΋಄֖։͍ͯਓؒͬͯূ໌ͯ͠ <- ΞϯμʔϫʔϧυਓΛ <- ਓ޻෺ݺ͹ΘΓ͚ͯͬ͠Ͳ͞ʙ ͓લΒͷੈքͷͦͷ্ʹ͸ Կ΋ͳ͍ͱݴ͍੾ΕΔΜ͔ʁ ͓લΒͷ૑଄ओ͕͍ͯɺ͓લΒࣗମ ਓ޻తʹͭ͘ΒΕͨΜ͡Όͳ͍ͬͯ ͦ͏͍͏ͷূ໌Ͱ͖Μͷ͔ʙ SAO ݱ࣮ੈքͷهऀ SAO ݱ࣮ੈքʹϩϘମͰ࿈Εͯ͜ΒΕͨ ΞϯμʔϫʔϧυਓͷΞϦε͞Μ Ҿ༻: https://sao-alicization.net/

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લ൒ऴΘΓ

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ޙ൒ ͦ΋ͦ΋CombineͰͷScheduler ͷ໾ׂ΍ಈ࡞

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• combine-schedulers͕ԿΛ΍ͬͯΔ͔஌Γ͍ͨ • ͦ΋ͦ΋CombineͷSchedulerͱ͸Կͳͷ͔Λઌʹ஌Βͳ͍ͱ͍͚ ͳ͍ • ͦ΋ͦ΋PublisherͱSubscriberͷ΍ΓͱΓ͔Β͓͞Β͍ • Schedulerϓϩτίϧͷϝιου͕ݺ͹ΕΔ͜ͱͷجૅ

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pointfreeco/combine-schdulers ͕ Ͳ͏΍ͬͯ೚ҙʹ࣌ؒΛ ੍ޚͰ͖Δͷ͔ͷͨΊͷجૅ

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Schedulerʹؔ͢ΔΑ͋͘Δઆ໌ͷྫ… Scheduler͸ʮUpstreamͷʯʮDownstreamͷʯ ॲཧεϨουΛ੾Γସ͑Δ

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Schedulerʹؔ͢ΔΑ͋͘Δઆ໌ͷྫ… Scheduler͸ʮUpstreamͷʯʮDownstreamͷʯ ॲཧεϨουΛ੾Γସ͑Δ ͱ͍͏ͷΛਂ۷Γͭͭ͠આ໌Λ͠·͢

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subscribe(on:)ͱreceive(on:) let cancellable = publisher .flatMap { … } .subscribe(on: DispatchQueue.global()) .map { String($0) } .receive(on: DispatchQueue.main) .sink { print($0) }

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subscribe(on:)ͱreceive(on:) let cancellable = publisher .flatMap { … } .subscribe(on: DispatchQueue.global()) .map { String($0) } .receive(on: DispatchQueue.main) .sink { print($0) }

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subscribe(on:)ͱreceive(on:) let cancellable = publisher .flatMap { … } .subscribe(on: DispatchQueue.global()) .map { String($0) } .receive(on: DispatchQueue.main) .sink { print($0) } subscribe(on:)Ͱࢦఆͨ͠εέδϡʔϥʹΑΓɺ UpstreamͱDownstreamεϨου͕੾ΓସΘΔ receive(on:)Ͱࢦఆͨ͠εέδϡʔϥʹΑΓɺ DownstreamͷεϨου͕੾ΓସΘΔ

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ਖ਼֬͞ͷͨΊͷิ଍ • subscribe(on:) • UpstreamͷεϨουΛ੾Γସ͑Δ͕ɺDownstremʹ΋Өڹ͕͋Δ • receive(on:) • DownstreamͷΈεϨουΛ੾Γସ͑Δ

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ਖ਼֬͞ͷͨΊͷิ଍ • subscribe(on:) • UpstreamͷεϨουΛ੾Γସ͑Δ͕ɺDownstremʹ΋Өڹ͕͋Δ • receive(on:) • DownstreamͷΈεϨουΛ੾Γସ͑Δ ͜ΕΒ͸୯ͳΔϧʔϧͰ͸ͳ͘ɺ ࣮ࡍ͸ཧղ͢Ε͹௚ײͰΘ͔ΔΘ͚Α

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WWDC19ͷCombineͷηογϣϯ ͜͜ͰSchedulerʹ͍ͭͯͷಈ࡞͕͋ΔͷͰͦΕͰิ଍͢Ε͹ྑͦ͞͏

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/05& 4VCTDSJQUJPOͷಈ࡞͸೚ҙͷͨΊɺ ͜ͷྫͰ͸͜͏͍͏ಈ࡞Λ ͍ͯ͠Δͱ͍͏ྫͰ͔͠ͳ͍Ͱ͢ɻ

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/05& 4VCTDSJQUJPOͷಈ࡞͸೚ҙͷͨΊɺ ͜ͷྫͰ͸͜͏͍͏ಈ࡞Λ ͍ͯ͠Δͱ͍͏ྫͰ͔͠ͳ͍Ͱ͢ɻ Publisher͕.subscribe(on: scheduler) ͞Ε͍ͯΕ͹ɺTVCTDSJCF΍SFDFJWF͞Εͨࡍ ࢦఆ͞Εͨ4DIFEVMFSͷϓϩτίϧͷϝιουͰ ॲཧΛ࣮ߦ͢Δ͜ͱͰΩϡʔΛ੾Γସ͑Δɻ ˣ 1VCMJTIFSͷΠϕϯτॲཧٴͼɺͦͷޙͷॲཧ΋ ੾Γସ͑ΒΕͨΩϡʔͰҾ͖ଓ͖࣮ߦ͞ΕΔɻ

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/05& 4VCTDSJQUJPOͷಈ࡞͸೚ҙͷͨΊɺ ͜ͷྫͰ͸͜͏͍͏ಈ࡞Λ ͍ͯ͠Δͱ͍͏ྫͰ͔͠ͳ͍Ͱ͢ɻ Publisher͕ .receive(on: scheduler) ͞Ε͍ͯΕ͹ɺSFDFJWF࣌ʹ ࢦఆ͞Εͨ4DIFEVMFS͕ ͦͷΩϡʔͰॲཧΛ࣮ߦ͢Δɻ ˣ ͦͷޙͷॲཧ΋ͦͷΩϡʔͰ Ҿ͖ଓ͖࣮ߦ͞ΕΔɻ Publisher͕.subscribe(on: scheduler) ͞Ε͍ͯΕ͹ɺTVCTDSJCF΍SFDFJWF͞Εͨࡍ ࢦఆ͞Εͨ4DIFEVMFSͷϓϩτίϧͷϝιουͰ ॲཧΛ࣮ߦ͢Δ͜ͱͰΩϡʔΛ੾Γସ͑Δɻ ˣ 1VCMJTIFSͷΠϕϯτॲཧٴͼɺͦͷޙͷॲཧ΋ ੾Γସ͑ΒΕͨΩϡʔͰҾ͖ଓ͖࣮ߦ͞ΕΔɻ

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Schedulerϓϩτίϧͷඞਢϝιου • schedule(options:_:) • schedule(after:tolerance:options:_:) • schedule(after:interval:tolerance:options:_:) https://developer.apple.com/documentation/combine/scheduler

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Scheduler ͷඞਢϝιου scheduler(options:_:) https://github.com/pointfreeco/combine-schedulers/blob/0.1.2/Sources/CombineSchedulers/TestScheduler.swift var scheduled: [(sequence: UInt, date: SchedulerTimeType, action: () -> Void)] = []

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ਖ਼֬͞ͷͨΊͷิ଍ -> ཧ۶͕Θ͔ͬͨ͸ͣ • subscribe(on:) • UpstreamͷεϨουΛ੾Γସ͑Δ͕ɺDownstremʹ΋Өڹ͕͋Δ • subscribe͞Εͨࡍ΍request͞Εͨࡍʹಈ࡞͢ΔεέδϡʔϥΛܾΊΔʢ࣮͸΋͏গ͠ ࡉ͔͘Ωϟϯηϧ͞Εͨࡍ΋ͦͷεέδϡʔϥ͕ಈ͘ʣ • receive(on:) • DownstreamͷΈεϨουΛ੾Γସ͑Δ • Subscriber͕receiveͨ͠ࡍʹಈ࡞͢ΔεέδϡʔϥΛܾΊΔ https://developer.apple.com/documentation/combine/publishers/handleevents/subscribe(on:options:)

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ͳΜͰ͜Μͳ࿩ͯ͠Δ͔

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pointfreeco/combine-schdulers ͸Ͳ͏΍ͬͯ ࣌ؒΛ੍ޚͯ͠Δ͔ͱ͔ͷ࿩

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combine-schedulersͷ advance(by:) ͕ԿΛ΍ͬͯΔͷ͔ΛݟͯΈΔ

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// scheduledऔΓग़ͤͨΒΞΫγϣϯΛ࣮ߦͯ͠࡟আ͓ͯ͘͠ now nextDate finalDate advance(by:)

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// ݱࡏ͔࣌ؒΒࢦఆ࣌ؒΛਐΊͨ࣌ؒ finalDate // scheduledऔΓग़ͤͨΒΞΫγϣϯΛ࣮ߦͯ͠࡟আ͓ͯ͘͠ now nextDate finalDate advance(by:)

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// ݱࡏ͔࣌ؒΒࢦఆ࣌ؒΛਐΊͨ࣌ؒ finalDate // ݱࡏ࣌ؒ <= ਐΊͨ࣌ؒͳΒ ͦͷؒϧʔϓʢͭ·Γݱࡏ࣌ؒ͸ਐΊΒΕΔʣ // scheduledऔΓग़ͤͨΒΞΫγϣϯΛ࣮ߦͯ͠࡟আ͓ͯ͘͠ now nextDate finalDate advance(by:)

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// ݱࡏ͔࣌ؒΒࢦఆ࣌ؒΛਐΊͨ࣌ؒ finalDate // ݱࡏ࣌ؒ <= ਐΊͨ࣌ؒͳΒ ͦͷؒϧʔϓʢͭ·Γݱࡏ࣌ؒ͸ਐΊΒΕΔʣ // scheduledऔΓग़ͤͨΒΞΫγϣϯΛ࣮ߦͯ͠࡟আ͓ͯ͘͠ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒ >= εέδϡʔϧ͞ΕͨΠϕϯτ࣌ؒ now nextDate finalDate advance(by:)

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// ݱࡏ͔࣌ؒΒࢦఆ࣌ؒΛਐΊͨ࣌ؒ finalDate // ݱࡏ࣌ؒ <= ਐΊͨ࣌ؒͳΒ ͦͷؒϧʔϓʢͭ·Γݱࡏ࣌ؒ͸ਐΊΒΕΔʣ // scheduledऔΓग़ͤͨΒΞΫγϣϯΛ࣮ߦͯ͠࡟আ͓ͯ͘͠ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒ͸ɺ·ͩεέδϡʔϧ͞ΕͨΠϕϯτͷ࣌ؒʹಧ͍ͯͳ͍ͷͰ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒ >= εέδϡʔϧ͞ΕͨΠϕϯτ࣌ؒ now nextDate finalDate advance(by:)

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// ݱࡏ͔࣌ؒΒࢦఆ࣌ؒΛਐΊͨ࣌ؒ finalDate // ݱࡏ࣌ؒ <= ਐΊͨ࣌ؒͳΒ ͦͷؒϧʔϓʢͭ·Γݱࡏ࣌ؒ͸ਐΊΒΕΔʣ // scheduledऔΓग़ͤͨΒΞΫγϣϯΛ࣮ߦͯ͠࡟আ͓ͯ͘͠ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒ͸ɺ·ͩεέδϡʔϧ͞ΕͨΠϕϯτͷ࣌ؒʹಧ͍ͯͳ͍ͷͰ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒʹͯ͠ advance(by:)Λऴྃ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒ >= εέδϡʔϧ͞ΕͨΠϕϯτ࣌ؒ now nextDate finalDate advance(by:)

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// ݱࡏ͔࣌ؒΒࢦఆ࣌ؒΛਐΊͨ࣌ؒ finalDate // ݱࡏ࣌ؒ <= ਐΊͨ࣌ؒͳΒ ͦͷؒϧʔϓʢͭ·Γݱࡏ࣌ؒ͸ਐΊΒΕΔʣ // scheduledऔΓग़ͤͨΒΞΫγϣϯΛ࣮ߦͯ͠࡟আ͓ͯ͘͠ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒ͸ɺ·ͩεέδϡʔϧ͞ΕͨΠϕϯτͷ࣌ؒʹಧ͍ͯͳ͍ͷͰ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒʹͯ͠ advance(by:)Λऴྃ // ݱࡏ࣌ؒΛεέδϡʔϧ͞ΕͨΠϕϯτ࣌ؒ·ͰਐΊΔ // ݱࡏ࣌ؒΛਐΊͨ࣌ؒ >= εέδϡʔϧ͞ΕͨΠϕϯτ࣌ؒ now nextDate finalDate advance(by:)

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• ͦ΋ͦ΋PublisherΛSubscribe͞ΕΔͱ • SchedulerΛݺͼग़͍ͯ͠ΔॲཧΩϡʔΛม͑ΔΘ͚͚ͩͲ • ΧελϜSchedulerΛ࡞ΔͱɺΠϕϯτͷൃՐ࣌ؒ·Ͱऔಘ͢Δ ͜ͱ ΋ Ͱ͖Δ

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TestScheduler pointfreeco/combine-schedulers https://github.com/pointfreeco/combine-schedulers/blob/0.1.2/Sources/CombineSchedulers/TestScheduler.swift

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https://github.com/pointfreeco/swift-composable-architecture/blob/0.8.0/Examples/Search/Search/SearchView.swift debounceΦϖϨʔλ͸࣮ࡍ͸ UpstreamΛsubscribeͯ͠Δɻ ͦͷͱ͖ 0.3ඵޙͱ͍͏৘ใΛ͍࣋ͬͯΔɻ εέδϡʔϥ͸Πϕϯτͷ ΩϡʔʹͦΕΛอ࣋ͯ͠Δ લ൒Ͱࣔͨ͠ςετίʔυΛݟฦͯ͠ΈΑ͏

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ͭ·Γ…

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TestScheduler͸Πϕϯτ͕Կඵޙʹ ى͜Δ͔ΛCombineͷ࢓૊Έ্஌Δ ͜ͱ͕Ͱ͖Δ

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TestScheduler͸advanceϝιουͰ ೚ҙͷ࣌ؒʹਐΊΔ͜ͱ͕Ͱ͖Δ

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ͳͷͰɺTCA͸Πϕϯτ͕೚ҙͷ࣌ؒ ʹ࣮ߦ͞ΕΔͷΛݟӽͨ͠ςετίʔ υΛॻ͘͜ͱ͕Ͱ͖Δʢඇಉظ࣮ߦΛ Ϝμʹ଴ͨͳ͍͍ͯ͘ʣ

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·ͱΊ • CombineͷScheduler͸ΩϡʔΛ੾Γସ͑ΒΕΔΑ͏ʹͳ͍ͬͯΔ ͕ɺ͍ͭͰʹΠϕϯτͷ࣮ߦ࣌ؒΛऔಘͰ͖Δ • combine-schedulersͰCombine͸ςετίʔυͷ࣌ؒΛ੍ޚͰ͖Δ • RxSwiftͷςετίʔυ͸࣌ؒΛԾ૝తʹѻ͑Δ • CombineͷSchedulerͰ΋Ծ૝࣌ؒతʹѻ͑Δ͔ʁͱ͍͏ͷ͸΍Ε͹ Ͱ͖ͦ͏Ͱ͸͋Δ͕ɺ΍Δඞཁੑ͸ͳ͍