Swiftをキめると 気持ちいい！

AKIBAswift #04での資料です

Transcript

1. 4XJGUΛΩΊΔͱ
   ؾ͍͍࣋ͪʂ AKIBA.swift #04
2. About Me • ాத ޹໌ (Takaaki Tanaka) • Ϋϥεϝιουגࣜձࣾ • @kongmingtrap • iOS Developer (Swift / Objective-C) • GyazSquare / GitHub
3. օ༷
4. 4XJGU
   ॻ͍͍ͯ·͔͢ʁ
5. 0CKFDUJWF$͔Βೖ͖ͬͯͨํʑ
6. πϥ͘ͳ͍Ͱ͔͢ʁ
7. ๻͸πϥ͔ͬͨͰ͢ɻ
8. ͦΕ͔Βɻɻɻ৭ʑ͋Γɻɻɻ
9. ศརͳؔ਺Λ࢖ͬͯ
   ؆ܿʹॻ͘Α͏ʹ͢Δ͜ͱͰ
   ॻ͘ͷָ͕͘͠ͳ͖ͬͯ·ͨ͠ɻ
10. ศརͳؔ਺ w GPS&BDI
    w NBQ
    w SFEVDF
    w pMUFS
    w qBUNBQ
11. ศརͳؔ਺ w GPS&BDI
    w NBQ
    w SFEVDF
    w pMUFS
    w qBUNBQ
12. NBQ
    
    qBUNBQ w 0QUJPOBM
    w 4FRVFODF5ZQF
    w $PMMFDUJPO
    w 'MBU.BQ ద༻͞Ε͍ͯΔऀͨͪ
13. NBQ
    
    qBUNBQ public func map<U>( _ transform: @noescape (Wrapped) throws -> U ) rethrows -> U? { switch self { case .some(let y): return .some(try transform(y)) case .none: return .none } }
14. ࡉ͔͍આ໌͸ল͍ͯޙʹͯ͠࢖ͬͯΈΑ͏
15. NBQ
    
    qBU.BQͰ
    ಈ࡞Λൺ΂ͯΈΔ
16. &YBNQMF enum PokemonType: String { case Grass = "Grass" case Water = "Water" case Fire = "Fire" case Electric = "Electric" } ͋Δ࣌͜Μͳ&OVN͕͓Γ·ͨ͠ɻ
17. 4FRVFODF let types = ["Grass", "Water", "Fire", "Electric"] let pokemonTypes = types.map { PokemonType(rawValue: $0) } [Optional PokemonType.Grass Optional PokemonType.Water Optional PokemonType.Fire Optional PokemonType.Electric ] ݁Ռ͕0QUJPOBMʹͳΔ
18. 4FRVFODF let types = ["Grass", "Water", "Fire", "Electric"] let pokemonTypes = types.flatMap { PokemonType(rawValue: $0) } [PokemonType.Grass PokemonType.Water PokemonType.Fire PokemonType.Electric] ݁Ռ͕VOXSBQ͞ΕΔ
19. 4FRVFODF let types = ["Grass", "Water", "Fire", "Ice"] let pokemonTypes = types.map { PokemonType(rawValue: $0) } [Optional PokemonType.Grass Optional PokemonType.Water Optional PokemonType.Fire nil] ۪௚ʹ݁ՌΛฦ͢
20. 4FRVFODF let types = ["Grass", "Water", "Fire", "Ice"] let pokemonTypes = types.flatMap { PokemonType(rawValue: $0) } [PokemonType.Grass PokemonType.Water PokemonType.Fire] ݁Ռ͕VOXSBQ͞ΕɺOJM͕ଧͪফ͞ΕΔ
21. $PMMFDUJPO let types1 = ["Electric", "Electric", "Fire"] let types2 = ["Water", "Ice"] let types3 = ["Fire", "Grass", "Rock", "Grass"] let types = [types1, types2, types3].map { $0 } [["Electric", "Electric", "Fire"], ["Water", "Ice"], ["Fire", "Grass", "Rock", "Grass"]]
22. $PMMFDUJPO let types1 = ["Electric", "Electric", "Fire"] let types2 = ["Water", "Ice"] let types3 = ["Fire", "Grass", "Rock", "Grass"] let types = [types1, types2, types3].flatMap { $0 } ["Electric", "Electric", "Fire", "Water", "Ice", "Fire", "Grass", "Rock", "Grass"] ݁Ռ͕qBUͳ"SSBZʹͳΔ
23. $PMMFDUJPO let types1 = ["Electric", "Electric", "Fire"] let types2 = ["Water", "Ice"] let types3 = ["Fire", "Grass", "Rock", "Grass"] let types = [types1, types2, types3].flatMap { $0 }.flatMap { PokemonType(rawValue: $0) } [PokemonType.Electric PokemonType.Electric PokemonType.Fire PokemonType.Water PokemonType.Fire PokemonType.Grass PokemonType.Grass] OJM͕ଧͪফ͞ΕΔͨΊɺཉ͍͠σʔλ͚ͩ࢒Δ
24. 0QUJPOBM let value: String? = "Fire" let value1 = value.map { PokemonType(rawValue: $0) } Optional Optional PokemonType.Fire ݁Ռ͕ೋॏͷ0QUJPOBMʹͳΔ
25. 0QUJPOBM let value: String? = "Fire" let value1 = value.flatMap { PokemonType(rawValue: $0) } Optional PokemonType.Fire ݁Ռͷ0QUJPOBM͕ଧͪফ͞ΕΔʢVOXSBQ͞ΕΔʣ
26. 0QUJPOBM let type = PokemonType(rawValue: "Water") let changedType = pokemon.map { type -> PokemonType in switch type { case .Water: return PokemonType.Electric default: return type } } Optional PokemonType.Electric VOXSBQͯ͠஋ΛऔΓѻ͏
27. 0QUJPOBM let value1: Int? = 10 let value2: Int? = 20 let value = value1.flatMap { v1 in value2.map { v2 in v1 + v2 } } Optional 30 0QUJPOBMಉ࢜ͷ஋ͷܭࢉ
28. ·ͱΊ w ؆ܿʹॻ͜͏
    w 0QUJPOBMͱ஥ྑ͘෇͖߹͓͏
    w 1MBZHSPVOEΛ༗ޮ׆༻͠Α͏
29. 5IBOL
    :PV