Golang で心を無にしてコードを書く

Transcript

1. Golang
   Ͱ৺Λແʹͯ͠ίʔυΛॻ͘ mitsuse@github LINE Developer Meetup #11

2. ͓·͑ɺͩΕΑɻ

3. ͓·͑ɺͩΕΑɻ

4. ͓·͑ɺͩΕΑɻ ɾಸྑͰࣗવݴޠॲཧ΍ͬͯͨ

5. ͓·͑ɺͩΕΑɻ ɾಸྑͰࣗવݴޠॲཧ΍ͬͯͨ ɾݩ
   Pythonista
   Ͱ
   Gopher
   Ͱ
   Vimmer

6. ͓·͑ɺͩΕΑɻ ɾಸྑͰࣗવݴޠॲཧ΍ͬͯͨ ɾ࢓ࣄͰ͸
   Scala
   ॻ͍ͯΔɾAkka
   ྑ͍ ɾݩ
   Pythonista
   Ͱ
   Gopher
   Ͱ
   Vimmer

7. ͓·͑ɺͩΕΑɻ ɾಸྑͰࣗવݴޠॲཧ΍ͬͯͨ ɾGoCon 2015
   ࢀՃࣦഊ͠·ͨ͠ ɾݩ
   Pythonista
   Ͱ
   Gopher
   Ͱ
   Vimmer ɾ࢓ࣄͰ͸
   Scala
   ॻ͍ͯΔɾAkka
   ྑ͍

8. Golang
   ॻ͍ͯ·͔͢ʁ

9. Golang
   ͱ͸ Go is an open source programming language that makes

   it easy to build simple, reliable, and efficient software. The Go Programming Language https://golang.org/

10. Golang
    ͱ͸ Go is an open source programming language that makes

    it easy to build simple, reliable, and efficient software. The Go Programming Language https://golang.org/

11. Golang
    ͱ͸ Go is an open source programming language that makes

    it easy to build simple, reliable, and efficient software. The Go Programming Language https://golang.org/

12. Golang
    ͱ͸ Go is an open source programming language that makes

    it easy to build simple, reliable, and efficient software. The Go Programming Language https://golang.org/

13. Golang
    ͱ͸ Go is an open source programming language that makes

    it easy to build simple, reliable, and efficient software. The Go Programming Language https://golang.org/

14. Golang
    ͱ͸ Go is an open source programming language that makes

    it easy to build simple, reliable, and efficient software. The Go Programming Language https://golang.org/ γϯϓϧͰ৴པੑͷ͋Δޮ཰ͷྑ͍ιϑτ΢ΣΞͷߏஙΛָʹʂ

15. ͳͥॻ͘ͷ͔ɿ
    ৺Λແʹͯ͠ॻ͘ͷʹௐ౓ྑ͍͔Β

16. ͳͥॻ͘ͷ͔ɿ
    ৺Λແʹͯ͠ॻ͘ͷʹௐ౓ྑ͍͔Β 
    ॆ࣮ͨ͠πʔϧ܈ʹΑΔαϙʔτɻ go
    ίϚϯυʹϏϧυɾςετɾίʔυ੔ܗɾੜ੒ͳͲͷπʔϧ͕ू໿

17. ͳͥॻ͘ͷ͔ɿ
    ৺Λແʹͯ͠ॻ͘ͷʹௐ౓ྑ͍͔Β 
    ॆ࣮ͨ͠πʔϧ܈ʹΑΔαϙʔτɻ 
    ੩తܕ෇͚ͳμοΫλΠϐϯάͰ໘౗͘͘͞ͳ͍ɻ ίϯύΠϧ࣌ʹܕνΣοΫͯ͠΄͍͚͠Ͳɺؾ࣋ͪ͸
    --
    ࢖͍Ͱ͍͍ͨ go
    ίϚϯυʹϏϧυɾςετɾίʔυ੔ܗɾੜ੒ͳͲͷπʔϧ͕ू໿

18. ͳͥॻ͘ͷ͔ɿ
    ৺Λແʹͯ͠ॻ͘ͷʹௐ౓ྑ͍͔Β 
    ॆ࣮ͨ͠πʔϧ܈ʹΑΔαϙʔτɻ 
    ੩తܕ෇͚ͳμοΫλΠϐϯάͰ໘౗͘͘͞ͳ͍ɻ 
    ࠇຐज़͕ͳ͍ɻݟͨ໨ͦͷ··ʹಈ͘ɻ ίϯύΠϧ࣌ʹܕνΣοΫͯ͠΄͍͚͠Ͳɺؾ࣋ͪ͸
    --
    ࢖͍Ͱ͍͍ͨ ҉໧తܕม׵ͱ͔ϚΫϩͱ͔ڧྗ͚ͩͲɺͦΕΑΓ͸ಡΈ΍͢͞ॏࢹ go
    ίϚϯυʹϏϧυɾςετɾίʔυ੔ܗɾੜ੒ͳͲͷπʔϧ͕ू໿

19. ࢲͷ৔߹ɿPython
    ͔Β
    Golang
    ΁

20. ࢲͷ৔߹ɿPython
    ͔Β
    Golang
    ΁ Python
    ͸ྑ͍ͷ͕ͩʜ

21. ࢲͷ৔߹ɿPython
    ͔Β
    Golang
    ΁ ɾ੩తܕνΣοΫ͍ͨ͠ Python
    ͸ྑ͍ͷ͕ͩʜ

22. ࢲͷ৔߹ɿPython
    ͔Β
    Golang
    ΁ ɾ੩తܕνΣοΫ͍ͨ͠ ɾ͋Δఔ౓ߴ଎ʹಈ͔͍ͨ͠ Python
    ͸ྑ͍ͷ͕ͩʜ

23. ࢲͷ৔߹ɿPython
    ͔Β
    Golang
    ΁ ɾ੩తܕνΣοΫ͍ͨ͠ ɾ͋Δఔ౓ߴ଎ʹಈ͔͍ͨ͠ ɾฒߦॲཧɾฒྻॲཧΛָʹॻ͖͍ͨ Python
    ͸ྑ͍ͷ͕ͩʜ

24. ࢲͷ৔߹ɿPython
    ͔Β
    Golang
    ΁ ɾ੩తܕνΣοΫ͍ͨ͠ ɾ͋Δఔ౓ߴ଎ʹಈ͔͍ͨ͠ ɾฒߦॲཧɾฒྻॲཧΛָʹॻ͖͍ͨ ɾ͚ͲɺίϯύΠϧ΍ϏϧυπʔϧͰਏ͘ͳΓͨ͘ͳ͍ Python
    ͸ྑ͍ͷ͕ͩʜ

25. ࢲͷ৔߹ɿPython
    ͔Β
    Golang
    ΁ ɾ੩తܕνΣοΫ͍ͨ͠ ɾ͋Δఔ౓ߴ଎ʹಈ͔͍ͨ͠ ɾฒߦॲཧɾฒྻॲཧΛָʹॻ͖͍ͨ ɾ͚ͲɺίϯύΠϧ΍ϏϧυπʔϧͰਏ͘ͳΓͨ͘ͳ͍ ͦΕɺGolang
    ͰͰ͖ΔΑʂ Python
    ͸ྑ͍ͷ͕ͩʜ

26. ୯७Ͱ෼͔Γ΍͍͢πʔϧ܈

27. 
    HP
    SVO
    
    ͱΓ͋͑ͣίϯύΠϧ࣮ͯ͠ߦ͢Δ

28. 
    HP
    SVO
    
    ͱΓ͋͑ͣίϯύΠϧ࣮ͯ͠ߦ͢Δ 1 package main 2 3 import ( 4 "fmt"

    5 ) 6 7 func main() { 8 fmt.Println("Hello, world!") 9 } ίϯύΠϧɾ࣮ߦΛ͓͜ͳ͏ɻ ɾίϯύΠϧ͸ߴ଎ ɾ͍ΘΏΔ
    --
    తͳؾ࣋ͪͰ࣮ߦ

29. 
    HP
    SVO
    
    ͱΓ͋͑ͣίϯύΠϧ࣮ͯ͠ߦ͢Δ 1 package main 2 3 import ( 4 "fmt"

    5 ) 6 7 func main() { 8 fmt.Println("Hello, world!") 9 } $ go run main.go ίϯύΠϧɾ࣮ߦΛ͓͜ͳ͏ɻ ɾίϯύΠϧ͸ߴ଎ ɾ͍ΘΏΔ
    --
    తͳؾ࣋ͪͰ࣮ߦ

30. 
    HP
    SVO
    
    ͱΓ͋͑ͣίϯύΠϧ࣮ͯ͠ߦ͢Δ 1 package main 2 3 import ( 4 "fmt"

    5 ) 6 7 func main() { 8 fmt.Println("Hello, world!") 9 } $ go run main.go ίϯύΠϧɾ࣮ߦΛ͓͜ͳ͏ɻ ɾίϯύΠϧ͸ߴ଎ ɾ͍ΘΏΔ
    --
    తͳؾ࣋ͪͰ࣮ߦ ʮͱΓ࣮͋͑ͣߦʯ͕ؾܰʹͰ͖Δ $ go run main.go Hello, world!

31. 
    HP
    SVO
    
    ͱΓ͋͑ͣίϯύΠϧ࣮ͯ͠ߦ͢Δ 1 package main 2 3 import ( 4 "fmt"

    5 ) 6 7 func main() { 8 fmt.Println("Hello, world!") 9 } $ go run main.go $ go run main.go Hello, world! ίϯύΠϧɾ࣮ߦΛ͓͜ͳ͏ɻ ɾίϯύΠϧ͸ߴ଎ ɾ͍ΘΏΔ
    --
    తͳؾ࣋ͪͰ࣮ߦ ։ൃऀͰ͋Δ
    Rob Pike
    ࢯ͍Θ͘ʮಛผ଎͍Θ͚Ͱ͸ͳ͍ɻ஗͘ͳΔ͜ͱΛ΍ͬͯͳ͍͚ͩɻʯͱͷ͜ͱ ʮͱΓ࣮͋͑ͣߦʯ͕ؾܰʹͰ͖Δ https://twitter.com/Morikuma_Works/status/538961275779162112

32. 
    HP
    GNU
    
    ίʔυΛ੔͑Δ

33. 
    HP
    GNU
    
    ίʔυΛ੔͑Δ ίʔυϑΥʔϚολʔ͕ެࣜʹఏڙ͞Ε͍ͯΔɻ

34. 
    HP
    GNU
    
    ίʔυΛ੔͑Δ ίʔυϑΥʔϚολʔ͕ެࣜʹఏڙ͞Ε͍ͯΔɻ ɾελΠϧͷ౷Ұͱ͍͏
    ॏཁ͚ͩͲ ෆໟͳٞ࿦͕ى͖ͳ͍ɻ

35. 
    HP
    GNU
    
    ίʔυΛ੔͑Δ ίʔυϑΥʔϚολʔ͕ެࣜʹఏڙ͞Ε͍ͯΔɻ ɾελΠϧͷ౷Ұͱ͍͏
    ॏཁ͚ͩͲ ෆໟͳٞ࿦͕ى͖ͳ͍ɻ ɾίʔυΛॻ͘͜ͱʹूதͰ͖Δɻอଘ࣌ʹࣗಈͰϑΥʔϚοτɻ

36. 
    HP
    GNU
    
    ίʔυΛ੔͑Δ 1 package main 2 3 4 import ( 5

    "fmt" 6 ) 7 8 func main(){ 9 fmt.Println( "Hello, world!") } ίʔυϑΥʔϚολʔ͕ެࣜʹఏڙ͞Ε͍ͯΔɻ ɾελΠϧͷ౷Ұͱ͍͏
    ॏཁ͚ͩͲ ෆໟͳٞ࿦͕ى͖ͳ͍ɻ ɾίʔυΛॻ͘͜ͱʹूதͰ͖Δɻอଘ࣌ʹࣗಈͰϑΥʔϚοτɻ

37. 
    HP
    GNU
    
    ίʔυΛ੔͑Δ 1 package main 2 3 4 import ( 5

    "fmt" 6 ) 7 8 func main(){ 9 fmt.Println( "Hello, world!") } ίʔυϑΥʔϚολʔ͕ެࣜʹఏڙ͞Ε͍ͯΔɻ $ go fmt main.go ɾελΠϧͷ౷Ұͱ͍͏
    ॏཁ͚ͩͲ ෆໟͳٞ࿦͕ى͖ͳ͍ɻ ɾίʔυΛॻ͘͜ͱʹूதͰ͖Δɻอଘ࣌ʹࣗಈͰϑΥʔϚοτɻ

38. 
    HP
    GNU
    
    ίʔυΛ੔͑Δ 1 package main 2 3 4 import ( 5

    "fmt" 6 ) 7 8 func main(){ 9 fmt.Println( "Hello, world!") } 1 package main 2 3 import ( 4 "fmt" 5 ) 6 7 func main() { 8 fmt.Println("Hello, world!") 9 } ίʔυϑΥʔϚολʔ͕ެࣜʹఏڙ͞Ε͍ͯΔɻ $ go fmt main.go ɾελΠϧͷ౷Ұͱ͍͏
    ॏཁ͚ͩͲ ෆໟͳٞ࿦͕ى͖ͳ͍ɻ ɾίʔυΛॻ͘͜ͱʹूதͰ͖Δɻอଘ࣌ʹࣗಈͰϑΥʔϚοτɻ

39. 
    HP
    HFU
    
    ύοέʔδΛऔಘͯ͠Πϯετʔϧ

40. 
    HP
    HFU
    
    ύοέʔδΛऔಘͯ͠Πϯετʔϧ $ go get -u github.com/mitsuse/bullet ύοέʔδ໊Λࢦఆ͢Δ͚ͩʂϏϧυ͔ΒΠϯετʔϧ·Ͱ׬ྃ͢Δɻ

41. 
    HP
    HFU
    
    ύοέʔδΛऔಘͯ͠Πϯετʔϧ $ go get -u github.com/mitsuse/bullet ύοέʔδ໊Λࢦఆ͢Δ͚ͩʂϏϧυ͔ΒΠϯετʔϧ·Ͱ׬ྃ͢Δɻ Makefile
    ૬౰ϑΝΠϧ΍ґଘؔ܎Λఆٛ͢ΔϑΝΠϧ͕ଘࡏ͠ͳ͍ɻ

42. 
    HP
    HFU
    
    ύοέʔδΛऔಘͯ͠Πϯετʔϧ $ go get -u github.com/mitsuse/bullet ύοέʔδ໊Λࢦఆ͢Δ͚ͩʂϏϧυ͔ΒΠϯετʔϧ·Ͱ׬ྃ͢Δɻ 1 import (

    2 ... 3 "github.com/codegangsta/cli" 4 "github.com/mitsuse/pushbullet-go" 5 "github.com/mitsuse/pushbullet-go/requests" 6 ) Makefile
    ૬౰ϑΝΠϧ΍ґଘؔ܎Λఆٛ͢ΔϑΝΠϧ͕ଘࡏ͠ͳ͍ɻ

43. 
    HP
    HFU
    
    ύοέʔδΛऔಘͯ͠Πϯετʔϧ $ go get -u github.com/mitsuse/bullet ύοέʔδ໊Λࢦఆ͢Δ͚ͩʂϏϧυ͔ΒΠϯετʔϧ·Ͱ׬ྃ͢Δɻ 1 import (

    2 ... 3 "github.com/codegangsta/cli" 4 "github.com/mitsuse/pushbullet-go" 5 "github.com/mitsuse/pushbullet-go/requests" 6 ) import
    ͞ΕͯΔύοέʔδ΋औಘɾϏϧυ Makefile
    ૬౰ϑΝΠϧ΍ґଘؔ܎Λఆٛ͢ΔϑΝΠϧ͕ଘࡏ͠ͳ͍ɻ

44. 
    HP
    HFU
    
    ύοέʔδΛऔಘͯ͠Πϯετʔϧ $ go get -u github.com/mitsuse/bullet ύοέʔδ໊Λࢦఆ͢Δ͚ͩʂϏϧυ͔ΒΠϯετʔϧ·Ͱ׬ྃ͢Δɻ ґଘؔ܎ͷ؅ཧ͸ɺίʔυதͷ
    import
    ͕݉Ͷ͍ͯΔɻແବ͕ͳ͍ɻ 1 import

    ( 2 ... 3 "github.com/codegangsta/cli" 4 "github.com/mitsuse/pushbullet-go" 5 "github.com/mitsuse/pushbullet-go/requests" 6 ) import
    ͞ΕͯΔύοέʔδ΋औಘɾϏϧυ Makefile
    ૬౰ϑΝΠϧ΍ґଘؔ܎Λఆٛ͢ΔϑΝΠϧ͕ଘࡏ͠ͳ͍ɻ

45. ܕγεςϜ͕୯७
    ܕʹ֊૚ؔ܎͕ͳ͍

46. ߏ଄ମ
    (struct)ɿ
    Go
    ͷߏ଄ମ͸ϝιουΛ࣋ͭ

47. ߏ଄ମ
    (struct)ɿ
    Go
    ͷߏ଄ମ͸ϝιουΛ࣋ͭ 1 package main 2 3 import ( 4

    "fmt" 5 ) 6 7 type Cat struct { 8 name string 9 } 10 11 func (c *Cat) Name() string { 12 return c.name 13 } 14 15 func main() { 16 cat := &Cat{ 17 name: "Rentaro", 18 } 19 20 fmt.Println(cat.Name()) 21 } ߏ଄ମͷΠϯελϯε͔Βυοτ෇͖Ͱϝιουݺͼग़͕͠Մೳɻ

48. ߏ଄ମ
    (struct)ɿ
    Go
    ͷߏ଄ମ͸ϝιουΛ࣋ͭ 1 package main 2 3 import ( 4

    "fmt" 5 ) 6 7 type Cat struct { 8 name string 9 } 10 11 func (c *Cat) Name() string { 12 return c.name 13 } 14 15 func main() { 16 cat := &Cat{ 17 name: "Rentaro", 18 } 19 20 fmt.Println(cat.Name()) 21 } ߏ଄ମͱϑΟʔϧυ ߏ଄ମͷΠϯελϯε͔Βυοτ෇͖Ͱϝιουݺͼग़͕͠Մೳɻ

49. ߏ଄ମ
    (struct)ɿ
    Go
    ͷߏ଄ମ͸ϝιουΛ࣋ͭ 1 package main 2 3 import ( 4

    "fmt" 5 ) 6 7 type Cat struct { 8 name string 9 } 10 11 func (c *Cat) Name() string { 12 return c.name 13 } 14 15 func main() { 16 cat := &Cat{ 17 name: "Rentaro", 18 } 19 20 fmt.Println(cat.Name()) 21 } ߏ଄ମͱϑΟʔϧυ ߏ଄ମ͸ϝιουΛ࣋ͭ ߏ଄ମͷΠϯελϯε͔Βυοτ෇͖Ͱϝιουݺͼग़͕͠Մೳɻ

50. ߏ଄ମ
    (struct)ɿ
    Go
    ͷߏ଄ମ͸ϝιουΛ࣋ͭ 1 package main 2 3 import ( 4

    "fmt" 5 ) 6 7 type Cat struct { 8 name string 9 } 10 11 func (c *Cat) Name() string { 12 return c.name 13 } 14 15 func main() { 16 cat := &Cat{ 17 name: "Rentaro", 18 } 19 20 fmt.Println(cat.Name()) 21 } ߏ଄ମͱϑΟʔϧυ ߏ଄ମ͸ϝιουΛ࣋ͭ {}
    ͔
    new
    
    Ͱੜ੒ɾॳظԽ ߏ଄ମͷΠϯελϯε͔Βυοτ෇͖Ͱϝιουݺͼग़͕͠Մೳɻ

51. ΠϯλʔϑΣʔε (interface)ɿ
    ϝιουఆٛͷू·Γ

52. ΠϯλʔϑΣʔε (interface)ɿ
    ϝιουఆٛͷू·Γ 1 type Named interface { 2 Name()

    string 3 } 4 5 type Cat struct { 6 name string 7 } 8 9 func (c *Cat) Name() string { 10 return c.name 11 } .. 21 func printName(n Named) { 22 fmt.Println(n.Name()) 23 } ΠϯλʔϑΣʔεͰϝιουͷγάωνϟΛఆٛ͢Δɻ

53. ΠϯλʔϑΣʔε (interface)ɿ
    ϝιουఆٛͷू·Γ 1 type Named interface { 2 Name()

    string 3 } 4 5 type Cat struct { 6 name string 7 } 8 9 func (c *Cat) Name() string { 10 return c.name 11 } .. 21 func printName(n Named) { 22 fmt.Println(n.Name()) 23 } ΠϯλʔϑΣʔε͸ϝιου܈Λఆٛ ΠϯλʔϑΣʔεͰϝιουͷγάωνϟΛఆٛ͢Δɻ

54. ΠϯλʔϑΣʔε (interface)ɿ
    ϝιουఆٛͷू·Γ 1 type Named interface { 2 Name()

    string 3 } 4 5 type Cat struct { 6 name string 7 } 8 9 func (c *Cat) Name() string { 10 return c.name 11 } .. 21 func printName(n Named) { 22 fmt.Println(n.Name()) 23 } ΠϯλʔϑΣʔε͸ϝιου܈Λఆٛ *Cat
    ͸
    Name()
    ϝιουΛ࣋ͭ ΠϯλʔϑΣʔεͰϝιουͷγάωνϟΛఆٛ͢Δɻ

55. ΠϯλʔϑΣʔε (interface)ɿ
    ϝιουఆٛͷू·Γ 1 type Named interface { 2 Name()

    string 3 } 4 5 type Cat struct { 6 name string 7 } 8 9 func (c *Cat) Name() string { 10 return c.name 11 } .. 21 func printName(n Named) { 22 fmt.Println(n.Name()) 23 } ΠϯλʔϑΣʔε͸ϝιου܈Λఆٛ *Cat
    ͸
    Name()
    ϝιουΛ࣋ͭ *Cat
    ͸
    Named
    Λຬ͍ͨͯ͠Δ ΠϯλʔϑΣʔεͰϝιουͷγάωνϟΛఆٛ͢Δɻ

56. ΠϯλʔϑΣʔε (interface)ɿ
    ϝιουఆٛͷू·Γ 1 type Named interface { 2 Name()

    string 3 } 4 5 type Cat struct { 6 name string 7 } 8 9 func (c *Cat) Name() string { 10 return c.name 11 } .. 21 func printName(n Named) { 22 fmt.Println(n.Name()) 23 } ΠϯλʔϑΣʔε͸ϝιου܈Λఆٛ ΠϯλʔϑΣʔεͰϝιουͷγάωνϟΛఆٛ͢Δɻ ΠϯλʔϑΣʔε͕࣋ͭϝιου܈ͷ࣮૷Λɺߏ଄ମ͕͍࣋ͬͯΔɻ ߏ଄ମ͸ɺͦͷΠϯλʔϑΣʔεܕͱͯ͠ར༻Ͱ͖Δɻ ࣮૷ͯ͠Δ͜ͱΛ໌ࣔ͠ͳͯ͘ྑ͍ɻ੩తͳμοΫλΠϐϯάɻ *Cat
    ͸
    Name()
    ϝιουΛ࣋ͭ *Cat
    ͸
    Named
    Λຬ͍ͨͯ͠Δ

57. ߏ଄ମຒΊࠐΈ (struct embedding)ɿ
    ҠৡʹΑΔΠϯλʔϑΣʔεͷ࣮૷ύλʔϯ

58. ߏ଄ମຒΊࠐΈ (struct embedding)ɿ
    ҠৡʹΑΔΠϯλʔϑΣʔεͷ࣮૷ύλʔϯ 1 type Named interface { 2

    Name() string 3 } 4 5 type Animal struct { 6 name string 7 } 8 9 func (a *Animal) Name() string { 10 return a.name 11 } 12 13 type Cat struct { 14 *Animal 15 } Golang
    ʹ͸ܧঝ͸ͳ͍ɻ ߏ଄ମຒΊࠐΈͰҠৡͯ͠ɺΠϯλʔ ϑΣʔεΛຬͨ͢ύλʔϯɻ

59. ߏ଄ମຒΊࠐΈ (struct embedding)ɿ
    ҠৡʹΑΔΠϯλʔϑΣʔεͷ࣮૷ύλʔϯ 1 type Named interface { 2

    Name() string 3 } 4 5 type Animal struct { 6 name string 7 } 8 9 func (a *Animal) Name() string { 10 return a.name 11 } 12 13 type Cat struct { 14 *Animal 15 } *Animal
    ͸
    Name()
    ϝιουΛ࣋ͭ ߏ଄ମຒΊࠐΈͰҠৡͯ͠ɺΠϯλʔ ϑΣʔεΛຬͨ͢ύλʔϯɻ Golang
    ʹ͸ܧঝ͸ͳ͍ɻ

60. ߏ଄ମຒΊࠐΈ (struct embedding)ɿ
    ҠৡʹΑΔΠϯλʔϑΣʔεͷ࣮૷ύλʔϯ 1 type Named interface { 2

    Name() string 3 } 4 5 type Animal struct { 6 name string 7 } 8 9 func (a *Animal) Name() string { 10 return a.name 11 } 12 13 type Cat struct { 14 *Animal 15 } ಗ໊ϑΟʔϧυ
    *Animal
    ͷϝιου͸ɺ
    *Cat
    ͷॴ༗෺ͷΑ͏ʹΞΫηεͰ͖Δ ߏ଄ମຒΊࠐΈͰҠৡͯ͠ɺΠϯλʔ ϑΣʔεΛຬͨ͢ύλʔϯɻ Golang
    ʹ͸ܧঝ͸ͳ͍ɻ *Animal
    ͸
    Name()
    ϝιουΛ࣋ͭ

61. ߏ଄ମຒΊࠐΈ (struct embedding)ɿ
    ҠৡʹΑΔΠϯλʔϑΣʔεͷ࣮૷ύλʔϯ 1 type Named interface { 2

    Name() string 3 } 4 5 type Animal struct { 6 name string 7 } 8 9 func (a *Animal) Name() string { 10 return a.name 11 } 12 13 type Cat struct { 14 *Animal 15 } ߏ଄ମຒΊࠐΈͰҠৡͯ͠ɺΠϯλʔ ϑΣʔεΛຬͨ͢ύλʔϯɻ ܕʹ֊૚ؔ܎͕ͳ͍ɻΠϯλʔϑΣʔεΛຬ͍ͨͯ͠Δ͔͕ॏཁɻ Golang
    ʹ͸ܧঝ͸ͳ͍ɻ ಗ໊ϑΟʔϧυ
    *Animal
    ͷϝιου͸ɺ
    *Cat
    ͷॴ༗෺ͷΑ͏ʹΞΫηεͰ͖Δ *Animal
    ͸
    Name()
    ϝιουΛ࣋ͭ

62. ഑෍ํ๏͕୯७

63. ୯ҰόΠφϦɾΫϩείϯύΠϧͰ഑෍͠΍͍͢

64. ୯ҰόΠφϦɾΫϩείϯύΠϧͰ഑෍͠΍͍͢ ࣮ߦՄೳϑΝΠϧ͸ɺ୯ҰͷϑΝΠϧʹ·ͱΊΒΕΔɻ ɾجຊతʹ͸ੜ੒͞ΕͨόΠφϦΛ഑෍͢Ε͹ྑ͍ɻ

65. ୯ҰόΠφϦɾΫϩείϯύΠϧͰ഑෍͠΍͍͢ ࣮ߦՄೳϑΝΠϧ͸ɺ୯ҰͷϑΝΠϧʹ·ͱΊΒΕΔɻ ɾجຊతʹ͸ੜ੒͞ΕͨόΠφϦΛ഑෍͢Ε͹ྑ͍ɻ ؀ڥม਺Ͱ
    OS
    ͱΞʔΩςΫνϟΛࢦఆ͢Δ͚ͩɻ

66. ୯ҰόΠφϦɾΫϩείϯύΠϧͰ഑෍͠΍͍͢ $ GOOS=windows GOARCH=amd64 go build main.go ؀ڥม਺Ͱ
    OS
    ͱΞʔΩςΫνϟΛࢦఆ͢Δ͚ͩɻ ྫ͑͹ɺOS X
    ্ͰɺWindows
    όΠφϦΛग़ྗ͢Δɻ

    ࣮ߦՄೳϑΝΠϧ͸ɺ୯ҰͷϑΝΠϧʹ·ͱΊΒΕΔɻ ɾجຊతʹ͸ੜ੒͞ΕͨόΠφϦΛ഑෍͢Ε͹ྑ͍ɻ

67. ୯ҰόΠφϦɾΫϩείϯύΠϧͰ഑෍͠΍͍͢ ྫ͑͹ɺOS X
    ্ͰɺWindows
    όΠφϦΛग़ྗ͢Δɻ ࣮ߦՄೳϑΝΠϧ͸ɺ୯ҰͷϑΝΠϧʹ·ͱΊΒΕΔɻ ɾجຊతʹ͸ੜ੒͞ΕͨόΠφϦΛ഑෍͢Ε͹ྑ͍ɻ ͦΕͧΕͷ؀ڥ޲͚ʹΫϩείϯύΠϧͯ͠όΠφϦΛҰͭ഑෍Ͱ
    OK ؀ڥม਺Ͱ
    OS
    ͱΞʔΩςΫνϟΛࢦఆ͢Δ͚ͩɻ $ GOOS=windows GOARCH=amd64

    go build main.go

68. Մಡੑ͸େ੾

69. “No magic”
    Ͱ͋Δ

70. “No magic”
    Ͱ͋Δ ͍ΘΏΔʮࠇຐज़ʯతͳػೳ͸࣮૷͞Εͳ͍

71. “No magic”
    Ͱ͋Δ ɾ҉໧తܕม׵ ɾϚΫϩ ɾ҉໧తͳύϥϝʔλʔ ͍ΘΏΔʮࠇຐज़ʯతͳػೳ͸࣮૷͞Εͳ͍

72. “No magic”
    Ͱ͋Δ ɾ҉໧తܕม׵ ɾϚΫϩ ɾ҉໧తͳύϥϝʔλʔ ͍ΘΏΔʮࠇຐज़ʯతͳػೳ͸࣮૷͞Εͳ͍ ʮࠇຐज़ʯ͸ڧྗ͚ͩͲɺద੾ʹ࢖͏ͷ͕೉͍͠ɻ

73. “No magic”
    Ͱ͋Δ ɾ҉໧తܕม׵ ɾϚΫϩ ɾ҉໧తͳύϥϝʔλʔ ͍ΘΏΔʮࠇຐज़ʯతͳػೳ͸࣮૷͞Εͳ͍ ίʔυ͕ݟͨ໨ͦͷ··ʹ࣮ߦ͞ΕΔ͜ͱ͕ॏࢹ͞ΕΔɻ ʮࠇຐज़ʯ͸ڧྗ͚ͩͲɺద੾ʹ࢖͏ͷ͕೉͍͠ɻ

74. “No magic”
    Ͱ͋Δ ɾ҉໧తܕม׵ ɾϚΫϩ ɾ҉໧తͳύϥϝʔλʔ ͍ΘΏΔʮࠇຐज़ʯతͳػೳ͸࣮૷͞Εͳ͍ ίʔυ͕ݟͨ໨ͦͷ··ʹ࣮ߦ͞ΕΔ͜ͱ͕ॏࢹ͞ΕΔɻ ʮࠇຐज़ʯ͸ڧྗ͚ͩͲɺద੾ʹ࢖͏ͷ͕೉͍͠ɻ ෳࡶͳػೳΛͱΓ͜·ͳ͍͜ͱͰݴޠͦͷ΋ͷΛγϯϓϧʹอͭɻ

75. “No magic”
    Ͱ͋Δ ɾ҉໧తܕม׵ ɾϚΫϩ ɾ҉໧తͳύϥϝʔλʔ ͍ΘΏΔʮࠇຐज़ʯతͳػೳ͸࣮૷͞Εͳ͍ ίʔυ͕ݟͨ໨ͦͷ··ʹ࣮ߦ͞ΕΔ͜ͱ͕ॏࢹ͞ΕΔɻ ʮࠇຐज़ʯ͸ڧྗ͚ͩͲɺద੾ʹ࢖͏ͷ͕೉͍͠ɻ ෳࡶͳػೳΛͱΓ͜·ͳ͍͜ͱͰݴޠͦͷ΋ͷΛγϯϓϧʹอͭɻ ࠇຐज़͕ೖΔ༨஍͕গͳ͍ͷͰՄಡੑͱ৴པੑ͕ҡ࣋͞Ε΍͍͢

76. خ͘͠ͳ͍ͱ͜Ζ

77. خ͘͠ͳ͍ͱ͜Ζɿ
 δΣωϦΫε͕ͳ͍ɾόʔδϣϯݻఆ͕ਏ͍

78. خ͘͠ͳ͍ͱ͜Ζɿ
 δΣωϦΫε͕ͳ͍ɾόʔδϣϯݻఆ͕ਏ͍ ɾΠϯλʔϑΣʔεͰ·͔ͳ͑Δέʔε΋ଟ͍͕ɺ೉͍͠৔໘΋ɻ ɾӬٱʹ࣮૷͞Εͳ͍Θ͚Ͱ͸ͳ͍͕ɺޓ׵ੑ্͠͹Β͘͸ͳ͍͔΋ʁ ɾந৅౓ͷߴ͍΋ͷΛॻ͘ͷ͸ਏ͍ɻΉ͠Ζॻ͘΂͖Ͱ͸ͳ͍ɻ δΣωϦΫε૬౰ͷ΋ͷ͸ͳ͍

79. خ͘͠ͳ͍ͱ͜Ζɿ
 δΣωϦΫε͕ͳ͍ɾόʔδϣϯݻఆ͕ਏ͍ ɾݱঢ়ެࣜͰ͸ɺϥΠϒϥϦͷόʔδϣϯΛݻఆ͢Δखஈ͸ͳ͍ɻ ɾgodep
    ͱ͔
    gopkg.in
    ͱ͔࢖͑͹Ͱ͖Δ͚Ͳɻ ɾGo 1.5
    Ҏ߱Ͱͪΐͬͱঢ়گมΘΔ͔΋ʁ ɾΠϯλʔϑΣʔεͰ·͔ͳ͑Δέʔε΋ଟ͍͕ɺ೉͍͠৔໘΋ɻ δΣωϦΫε૬౰ͷ΋ͷ͸ͳ͍ ϥΠϒϥϦͷόʔδϣϯͷݻఆ͕೉͍͠ ɾӬٱʹ࣮૷͞Εͳ͍Θ͚Ͱ͸ͳ͍͕ɺޓ׵ੑ্͠͹Β͘͸ͳ͍͔΋ʁ

    ɾந৅౓ͷߴ͍΋ͷΛॻ͘ͷ͸ਏ͍ɻΉ͠Ζॻ͘΂͖Ͱ͸ͳ͍ɻ

80. Ұ൪େ੾ͳ͜ͱ

81. Gopher
    ͸͔Θ͍͍

82. ·ͱΊɿπʔϧͱࢥ૝Ͱ৺ΛແʹͰ͖Δݴޠ 
    ॆ࣮ͨ͠πʔϧ܈ʹΑΔαϙʔτɻ 
    ੩తܕ෇͚ͳμοΫλΠϐϯάͰ໘౗͘͘͞ͳ͍ɻ 
    ࠇຐज़͕ͳ͍ɻݟͨ໨ͦͷ··ʹಈ͘ɻ go
    ίϚϯυʹϏϧυɾςετɾίʔυ੔ܗɾੜ੒ͳͲͷπʔϧ͕ू໿ ίϯύΠϧ࣌ʹܕνΣοΫͯ͠΄͍͚͠Ͳɺؾ࣋ͪ͸
    --
    ࢖͍Ͱ͍͍ͨ ҉໧తܕม׵ͱ͔ϚΫϩͱ͔ڧྗ͚ͩͲɺͦΕΑΓ͸ಡΈ΍͢͞ॏࢹ