それは残像だ

http://regional-gh.rubykaigi.org/tochigi08/

Transcript

1. ͦΕ͸࢒૾ͩ @yhara (Yutaka Hara) 2019/6/29 ͱͪ͗Rubyձٞ08
2. About me • @yhara (Yutaka Hara) • https://yhara.jp • NaCl দߐຊࣾ
3. ʰRubyͰ࡞Δحົͳϓϩάϥϛϯάݴޠʱ
4. ֓ཁ Zanzouͱ͍͏gemΛ࡞Γ·ͨ͠ɻ Zanzou͸ɺΦϒδΣΫτͷʮҰ෦͚ͩॻ͖׵ ͑ͨ΍ͭʯΛ؆୯ʹ࡞ΔͨΊͷgemͰ͢ɻ
5. Agenda 1. Zanzouͱ͸ 2. ZanzouͷΞϧΰϦζϜ 3. Zanzouͷ࣮૷ͱ໰୊఺
6. 1. Zanzouͱ͸ Zanzou͸4݄ͷRubyKaigiͰൃදͨ͠Ovtoͱ͍ ͏WebϑϨʔϜϫʔΫͷͨΊʹ࡞Γ·ͨ͠ɻ https://github.com/yhara/ovto
7. IUUQTSVCZLBJHJPSHQSFTFOUBUJPOTZIBSBIUNM
8. ཁ໿ • RubyͰϒϥ΢βΞϓϦΛ࡞ΕΔϑϨʔϜϫʔ ΫΛ࡞ͬͨ • RubyͰը໘ͷఆٛΛॻ͘ˠOpalͰJavaScript ʹม׵͢Δˠϒϥ΢β্Ͱಈ͘
9. Ovtoͷ͘͠Έ • app.stateͱ͍͏ΦϒδΣΫτʹΞϓϦͷશঢ়ଶ͕ೖ͍ͬͯ Δ • state͕มԽͨ͠Βը໘Λߋ৽͢Δ • ʮมԽ͔ͨ͠ʯΛݕࠪ͢Δʹ͸ɺݩͷঢ়ଶ͕ඞཁ • ʮগ͠มߋͨ͠΋ͷʯΛ࡞Δͷ͕ͪΐͬͱ໘౗ • JSͰ͸Ͳ͏ͳΜͩΖ͏ʁˠimmer.jsͱ͍͏΋ͷ͕͋ΔΒ͠ ͍ˠԿ͜Ε໘ന͍ɺRubyʹҠ২Ͱ͖ͳ͍͔ͳ
10. ྫ todos = [ {id: 1, title: "ཛΛങ͏", done: false}, {id: 2, title: "૟আػΛ͔͚Δ", done: false}, ] ͜͜ΛUSVFʹ͍ͨ͠ͱ͢Δ
11. ୯७ʹ΍Δͱ͜͏ todos = [ {id: 1, title: "ཛΛങ͏", done: false}, {id: 2, title: "૟আػΛ͔͚Δ", done: false}, ] todos[1][:done] = true ͜͜ΛUSVFʹ͍ͨ͠ͱ͢Δ
12. todosΛॻ͖׵͑ͨ͘ͳ͍࣌͸ʁ todos = [ {id: 1, title: "ཛΛങ͏", done: false}, {id: 2, title: "૟আػΛ͔͚Δ", done: false}, ] new_todos = todos.map{|x| if x[:id] == 2 x.merge(done: true) else x end } ͜͜ΛUSVFʹ͍ͨ͠ͱ͢Δ
13. ཧ૝ɹɹɹɹݱ࣮ new_todos = todos.map{|x| if x[:id] == 2 x.merge(done: true) else x end } todos[1][:done] = true
14. zanzouΛ࢖͏ͱ todos = [ {id: 1, title: "ཛΛങ͏", done: false}, {id: 2, title: "૟আػΛ͔͚Δ", done: false}, ] require 'zanzou' new_todos = Zanzou.with_updates(todos) do |shadow_todos| shadow_todos[1][:done] = true } ͜͜ΛUSVFʹ͍ͨ͠ͱ͢Δ ˢʮ൪໨ͷEPOFΛUSVFʹ͢Δʯ͕ͦͷ··ॻ͚Δ
    ͔ͭΦϦδφϧ͸ແࣄ
15. ໊લͷ༝དྷ
17. ΍͔ͬͨʂʁ
    
    
18. ࢒૾ͩʜ ͳʹͬ
19. ΦϒδΣΫτ ഁյతૢ࡞ ϓϩάϥϜ
20. ର৅Λ௚઀ૢ࡞͍ͯ͠ΔΑ͏͚ͩͲɺ ݩͷΦϒδΣΫτ͸ແࣄ (࢒૾ͳͷͰ) ΦϒδΣΫτ ഁյతૢ࡞ ϓϩάϥϜ ࣮ߦ݁Ռ
21. 2. ZanzouͷΞϧΰϦζϜ ͜ͷΑ͏ͳಈ࡞Λ࣮ݱ͢Δʹ͸Ͳ͏͢Ε͹Α͍Ͱ͠ΐ͏͔ʁ Zanzouͷ࢓૊Έ͸ɺimmer.jsͱ͍͏JavaScriptͷϥΠϒϥ ϦΛࢀߟʹ͍ͯ͠·͢ɻ https://github.com/immerjs/immer
22. Ұ൪ʮ؆୯ʯͳ΍Γํɹ • ΦϒδΣΫτશମΛෳ੡͢Δ • ෳ੡ͨ͠΋ͷΛมߋͤ͞Δ • ໰୊఺ɿ஗͍
23. ྫɿશ෦ෳ੡ͯ͠͠·͑͹ಈ͚͘ Ͳ… UPEPT
    
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    OFX@UPEPT
    
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    GBMTF 5PEP
    JE
    
    
    EPOF
    GBMTF 5PEP
    JE
    
    
    EPOF
    GBMTF 5PEP
    JE
    
    
    EPOF
    GBMTF 5PEP
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    GBMTF 5PEP
    JE
    
    
    EPOF
    USVF 5PEP
    JE
    
    
    EPOF
    GBMTF 5PEP
    JE
    
    
    EPOF
    GBMTF
24. UPEPT
    
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    ڞ༗Ͱ͖Δͱ͜Ζ͸ڞ༗͍ͨ͠ 5PEP
    JE
    
    
    EPOF
    GBMTF 5PEP
    JE
    
    
    EPOF
    GBMTF 5PEP
    JE
    
    
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    GBMTF 5PEP
    JE
    
    
    EPOF
    GBMTF 5PEP
    JE
    
    
    EPOF
    USVF
25. खॱ̍ɿϧʔτShadowΛ࡞Δ "SSBZ ΋ͱͷ
    ΦϒδΣΫτ ࢒૾
    4IBEPX )BTI )BTI  GBMTF  GBMTF "SSBZ
    4IBEPX   JE EPOF JE EPOF TIBEPX<><EPOF>
    
    USVF
26. ઓུ̎ɿࢀর͞ΕͨΒShadowΛฦ͢ "SSBZ ΋ͱͷ
    ΦϒδΣΫτ ࢒૾
    4IBEPX )BTI )BTI  GBMTF  GBMTF "SSBZ
    4IBEPX   JE EPOF JE EPOF TIBEPX<><EPOF>
    
    USVF )BTI
    4IBEPX
27. ઓུ̏ɿॻ͖׵͑ΒΕͨΒͦͷ͜ͱΛ ͓֮͑ͯ͘ "SSBZ ΋ͱͷ
    ΦϒδΣΫτ ࢒૾
    4IBEPX )BTI )BTI  GBMTF  GBMTF "SSBZ
    4IBEPX   JE EPOF JE EPOF TIBEPX<><EPOF>
    
    USVF )BTI
    4IBEPX EPOF
    Λ
    USVF
    ʹ͢Δ
28. ઓུ̐ɿϑΝΠφϥΠζ "SSBZ ΋ͱͷΦϒδΣΫτ )BTI )BTI  GBMTF  GBMTF   JE EPOF J EPOF ࢒૾
    "SSBZ
    )BTI
    EPOF
    Λ
    USVF
    ʹ͢Δ "SSBZ ฦΓ஋
    )BTI USVF   JE EPOF
29. ઓུ̐ɿϑΝΠφϥΠζ "SSBZ ΋ͱͷΦϒδΣΫτ )BTI )BTI  GBMTF  GBMTF   JE EPOF J EPOF ࢒૾
    "SSBZ
    )BTI
    EPOF
    Λ
    USVF
    ʹ͢Δ "SSBZ ฦΓ஋
    )BTI USVF   JE EPOF
30. 3. Zanzouͷ࣮૷ͱ໰୊఺ Zanzou͸͓͓Αͦɺmethod_missingͰग़དྷͯ ͍·͢ɻ͍͍ͩͨಈ͖·͕͢ɺ·ͩ໰୊΋͋Γ ·͢ɻ BasicObject#method_missing
31. Zanzouͷ࣮૷ • method_missingΛଟ༻ • https://docs.ruby-lang.org/ja/latest/ method/BasicObject/i/ method_missing.html • ʮଘࡏ͠ͳ͍ϝιου͕ݺ͹Εͨʯͱ͖ͷ ॲཧΛࢦఆͰ͖Δ
32. αϙʔτൣғ A. JSON࡞Δͷʹ࢖͏Α͏ͳΦϒδΣΫτ͸α ϙʔτ͍ͨ͠ • Hash, Array, String, ਺஋, true, false, nil B. ಠࣗΫϥε΋ઃఆΛ͢Ε͹࢖͑ΔΑ͏ʹ͍ͨ͠ C. ͲͷϝιουΛݺΜͰ΋େৎ෉ʹ͍ͨ͠
33. αϙʔτ೉қ౓ 1. ਺஋, true, false, nil • immutable(ঢ়ଶΛ΋ͨͳ͍ʹมߋ͢Δ͜ͱ͕Ͱ͖ͳ͍)ͷͰ༨༟ 2. String • mutableͰ͸͋Δ͚ͲɺίϯςφͰ͸ͳ͍ͷͰ؆୯ 3. Hash • ίϯςφ(ଞͷΦϒδΣΫτΛࢠཁૉͱͯ͠΋ͭ)ͳͷͰগ͠େม 4. Array • ίϯςφ͔ͭɺΠϯσοΫε͕ͣΕΔέʔε͕͋ΔͷͰ࠷ѱ
34. Arrayͷ໰୊ • ࢠཁૉΛഁյͨ͋͠ͱɺͲ͜ʹ໭ͤ͹͍͍ʁ • 3൪໨ͷཁૉͩͬͨ͸͕ͣɺdeleteͰ2൪໨ ʹͳ͍ͬͯΔ͔΋ • ͦ΋ͦ΋Կ൪໨͔Θ͔Βͳ͍͜ͱ΋ (Array#sample)
35. Կ͕ࠔΔͷ͔ • ྫɿTODOͷ഑ྻ͕͋Δͱ͢Δ • ͋ΔTODOΛมߋ͢Δ৔߹ɺҎԼ͕ඞཁ • ࢠཁૉΛdup͠ɺมߋ͢Δ͜ͱ • ৽چ2ͭͷ഑ྻ͕͋Δ͜ͱ • ৽഑ྻͷࢠཁૉ͚ͩɺ৽͍͠΋ͷʹஔ͖׵Θ͍ͬͯΔ͜ͱ • ↑͜ͷͱ͖ʹΠϯσοΫε͕ඞཁʹͳΔ
36. ͪͳΈʹimmer.jsͷ৔߹ • ES6 Proxyͱ͍͏΋ͷΛ࢖͍ͬͯΔ • ΦϒδΣΫτʹର͢Δset/getΛϑοΫͰ͖ Δ • sort()ͱ͔΋શͯͷset/get͕ϑοΫ͞ΕΔ(͢ ͍͝)
37. TPSU ͕಺෦తʹߦͬͨಈ࡞͕શ෦ϑοΫͰ͖ͯΔˢ
    ʹࢠཁૉ͕ผͷΠϯσοΫεʹҠಈͨ͜͠ͱΛݕ஌Ͱ͖Δ
38. ·ͱΊ • ES6 Proxy͸͍͢͝ • Rubyͷsort()͸CͰ࣮૷͞Ε͓ͯΓɺͦͷ಺෦ಈ࡞͸ϑοΫͰ͖ ͳ͍ • جຊతͳέʔεͰ͸ಈ͍͍ͯΔ • ࢒Δέʔε͸pending specʹͯ͋͠ΔͷͰ୭͔௅ઓͯ͠΄͍͠ • 200ߦ͘Β͍ͳͷͰಡΜͰΈΔͱ໘ന͍͔΋ • https://github.com/yhara/zanzou