Kotlinでマッチョ💪💪💪💪💪する話

Kotlinでマッチョ💪💪💪💪💪する話

Retty Tech Cafe #8
https://retty.connpass.com/event/45628/

Transcript

1. KotlinͰ
 Ϛονϣ ͢Δ࿩ Retty Tech Cafe #8
2. About Me Shinobu Okano @operandoOS Mercari, Inc. Souzoh, Inc.
4. ຖ೔30෼ Kotlin΍ͬͯ·͢ • ࡶʹࡶʹϝϞΛ࢒ͯ͠·͢ • http://hack-it-iron.hatenablog.com/archive/ category/Kotlin
5. Tuple ෳ਺ݸͷ஋Λ૊Έʹͯ͠·ͱΊͨ΋ͷ
6. Α͏͸ Ұ࣌తͳείʔϓͰෳ਺ݸͷσʔλͷ૊Έ߹Θ͕ͤ
 ཉ͍͚͠ͲɺClassΛఆٛ͢Δ΄ͲͰ΋ͳ͍ͳʔ
 ͬͯ࣌ʹ༗ޮ
7. Guild https://github.com/operando/Guild/ Simple java tuples.
8. ͳͥTuple͕ඞཁ͔ͩͬͨ • Android + JSON-RPC • http://www.slideshare.net/shinobuokano7/ android-jsonrpc • ཧ༝ॻ͍ͯ͋Δ͔΋ʁ
9. KotlinͷPair val pair = 1 to "pair" println(pair.first) // 1 println(pair.second) // pair
10. Triple΋͋ΔΑ val triple = Triple(1, true, "Triple") println(triple.first) // 1 println(triple.second) // true println(triple.third) // Triple
11. ͜ΕΛΈ͓ͯ΋ͬͨ
12. ͜͏ॻ͚ͳ͍ͷʁ val triple = 1 to true to "Triple"
13. ͜͏ॻ͚ͳ͍ͷʁ val triple = A to B to C
14. ͦͷ··Ͱ͸ॻ͚ͳʔ͍ • Pair in Pairʹͳͬͯ͠·͏ • Pair<Pair<A,B>,C> • ((1,true)"Triple")
15. ͳʔΜͩɺΧοίΘΔ͍
16. ͦ΋ͦ΋ Pairͷtoͬͯ
 Ͳ͏ͳͬͯΔΜͩ?
17. ͦ΋ͦ΋ PairͷtoͬͯͲ͏ͳͬͯΔΜͩ? public infix fun <A, B> <A, B>.to(that: B)
 : Pair<A, B> = Pair(this, that)
18. ͳΔ΄Ͳ
19. ͍΍ɺ·ͯΑ
20. ಉ͡Α͏ʹ֦ுؔ਺
 ࡞Ε͹Ͱ͖Δ͔☺
21. Pair͔ΒTripleΛ࡞Δ֦ுؔ਺Λॻ͍ͯΈͨ infix fun <A, B, C> Pair<A, B>.to(that: C)
 : Triple<A, B, C> = 
 Triple(this.first, this.second, that)
22. ͡ΌtoͰͭͳ͛ͯ
 ॻ͍ͯΈΑ͏
23. ͡ΌtoͰͭͳ͛ͯॻ͍ͯΈΑ͏ val triple = 1 to true to "Triple" println(triple.first) // 1 println(triple.second) // true println(triple.third) // Triple println(triple.javaClass) // class kotlin.Triple
24. Ͱ͖ͨ☺
25. ΋ͬͱϚοεϧ
 ͍ͨ͠Ͱ͠ΐʁ
26. 4ͭͷ஋Λ࣋ͭ
 Tuple QuartetΛ࡞Ζ͏
27. 4ͭͷ஋Λ࣋ͭTuple QuartetΛ࡞Ζ͏ class Quartet<out F, out S, out T, out FO>( val first: F, val second: S, val third: T, val fourth: FO,) { override fun toString(): String { return "Quartet(first=$first, second=$second,
 third=$third, fourth=$fourth)" } }
28. toͭͳ͗ͰQuartetΛ
 ࡞ΕΔΑ͏ʹ͢Δ
29. Triple͔ΒQuartetΛ࡞Δ֦ுؔ਺Λॻ͘ infix fun <A, B, C, D> Triple<A, B, C>.to(that: D): Quartet<A, B, C, D> = 
 Quartet(this.first, this.second, this.third, that)
30. Quartet࢖ͬͯΈΑ͏ val quartet = 1 to 10L to true to "quartet" println(quartet.first) // 1 println(quartet.second) // 10 println(quartet.third) // true println(quartet.fourth) // quartet
31. ΋ͬͱϚοεϧ
 ΄͘͠ͳ͍??
32. 5ͭͷ஋Λ࣋ͭ
 Tuple QuintetΛ࡞Ζ͏
33. 5ͭͷ஋Λ࣋ͭTuple QuintetΛ࡞Ζ͏ class Quintet<out F, out S, out T, out FO, out FI>( val first: F, val second: S, val third: T, val fourth: FO, val five: FI) { override fun toString(): String { return "Quintet(first=$first, second=$second,
 third=$third, fourth=$fourth, five=$five)" } }
34. ͸͍͸͍ɺtoΛͭͳ͛ͯ
 ॻ͍ͯ࡞Γ͍ͨΑͶ
35. ͸͍͸͍ɺ֦ுؔ਺֦ுؔ਺ infix fun <A, B, C, D, E> Quartet<A, B, C, D>.to(that: E): Quintet<A, B, C, D, E> = Quintet(this.first, this.second, this.third, this.fourth, that)
36. Quintet࢖ͬͯΈΑ͏ val quintet = 1 to 10L to true to LocalDateTime.now() to "quintet" println(quintet.first) // 1 println(quintet.second) // 10 println(quintet.third) // true println(quintet.fourth) // 2016-12-09T19:45:38.959 println(quintet.five) // quintet
37. Libraryʹ͠·ͨ͠
38. Guild Kotlin https://github.com/operando/Guild/ tree/master/guild-kotlin ͍͔ͭjCenterͱ͔ʹ͋͛·ʔ͢
39. Links • Pair͔ΒTripleΛ࡞Δ֦ுؔ਺Λॻ͍ͯΈͨ - 2016/12/03ͷ30෼ KotlinϝϞ • http://hack-it-iron.hatenablog.com/entry/2016/12/03/165601 • 4ͭͱ5ͭ஋Λ࣋ͭTupleΛ࡞ͬͯΈͨ - 2016/12/04ͷ30෼ KotlinϝϞ • http://hack-it-iron.hatenablog.com/entry/2016/12/04/223509 • TupleϥΠϒϥϦ GuildͷKotlin൛࡞ͬͯΈͨ - 2016/12/09ͷ30෼ KotlinϝϞ • http://hack-it-iron.hatenablog.com/entry/2016/12/09/172657 • Guild • https://github.com/operando/Guild/
40. Thanks!