Sometimes Swift confuses Kotlin engineers.

I'm a Kotlin engineer and just start learning Swift language. This is the story how swift confuses me :(
(Japanese only)

Transcript

1. KotlinΤϯδχΞ͕Swiftʹೖ໳ ͨ͠Βͪΐͬͱށ࿭ͬͨ࿩ 2017.8.9 Swift/Kotlin߹ಉษڧձ Fukui Atsuko
2. About me • ෱Ҫರࢠ / Fukui Atsuko • @muumuumuumuu • Retty, Inc. • AndroidΤϯδχΞ • ͦͷલ͸૊ΈࠐΈܥAndroidͷ͓࢓ࣄ
3. Kotlinྺ • 1೥൒લ͘Β͍͔ΒϓϩμΫτʹ౤ೖ IUUQFOHJOFFSSFUUZNFFOUSZSFUUZUPLPUMJO
4. Swiftೖ໳͠·ͨ͠
5. ײ૝
6. ֓ͶKotlinͱಉ͡ϊϦͰ͍͚Δ • ಛʹ͜ͷೋ͕ͭ͋Δͷ͕خ͍͠ • ֦ுؔ਺ • ஗ԆධՁ • lazy͕letʹ࢖͑Δͱ΋ͬͱྑ͔ͬͨ
7. Ͱ΋ɺ ޷͖ʹͳΕͳ͍ͱ͜Ζ΋͋Δ
8. ޷͖ͳͳΕͳ͍ͱ͜Ζ • ωʔϜεϖʔε͕ͳ͍ʂʂ • (KotlinͰ͍͏) ఆ਺Λએݴ͢Δ࣌ʹͲ͏͢Δ ͷʁʁ
9. ެࣜυΩϡϝϯτᐌ͘ ݴޠ ࠶୅ೖՄ ,FZXPSE %FTDSJQUJPO 4XJGU ࠶୅ೖෆՄ MFU :PV
   EFDMBSF
   DPOTUBOUT
   XJUI
   UIF
   MFU
   LFZXPSE ࠶୅ೖՄೳ WBS BOE
   WBSJBCMFT
   XJUI
   UIF
   WBS
   LFZXPSE
   ,PUMJO ࠶୅ೖෆՄ WBM "TTJHOPODF
   SFBEPOMZ
   MPDBM
   WBSJBCMF
   ࠶୅ೖՄೳ WBS .VUBCMF
   WBSJBCMF
10. KotlinͰఆ਺ͬͯݴͬͨΒ͜ΕͰ͠ΐ • جຊతʹconstΛ͚ͭΔ • τοϓϨϕϧͰએݴ • Ϋϥεͷcompanion objectͷத
11. Swiftͩͱʁ • τοϓϨϕϧͰએݴͰ͖Δ͕ɺ໊લͷিಥʹ ؾΛ͚ͭΔඞཁ͕͋Δ • ωʔϜεϖʔε͕ͳ͍ͷͭΒ͍ • Classͷ಄Ͱstatic let
12. ఆ਺ͷهड़ͷ࢓ํ ݴޠ ه๏ ྫ 4XJGU -PXFS
    $BNFM
    $BTF UIJT*T4XJGU$POTUBOU ,PUMJO 4OBLF
    $BTF 5)*4@*4@,05-*/@$0/45"/5
13. ·ͱΊ • SwiftʹωʔϜεϖʔεཉ͍͠ • Swiftͷఆ਺ͷॻ͖ํʹ׳Εͳ͍ • Kotlin͸͔Θ͍͍
14. ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ