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それは残像だ
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yhara
June 29, 2019
Programming
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4.5k
それは残像だ
http://regional-gh.rubykaigi.org/tochigi08/
yhara
June 29, 2019
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Transcript
ͦΕ૾ͩ @yhara (Yutaka Hara) 2019/6/29 ͱͪ͗Rubyձٞ08
About me • @yhara (Yutaka Hara) • https://yhara.jp • NaCl
দߐຊࣾ
ʰRubyͰ࡞Δحົͳϓϩάϥϛϯάݴޠʱ
֓ཁ Zanzouͱ͍͏gemΛ࡞Γ·ͨ͠ɻ ZanzouɺΦϒδΣΫτͷʮҰ෦͚ͩॻ͖ ͑ͨͭʯΛ؆୯ʹ࡞ΔͨΊͷgemͰ͢ɻ
Agenda 1. Zanzouͱ 2. ZanzouͷΞϧΰϦζϜ 3. Zanzouͷ࣮ͱ
1. Zanzouͱ Zanzou4݄ͷRubyKaigiͰൃදͨ͠Ovtoͱ͍ ͏WebϑϨʔϜϫʔΫͷͨΊʹ࡞Γ·ͨ͠ɻ https://github.com/yhara/ovto
IUUQTSVCZLBJHJPSHQSFTFOUBUJPOTZIBSBIUNM
ཁ • RubyͰϒϥβΞϓϦΛ࡞ΕΔϑϨʔϜϫʔ ΫΛ࡞ͬͨ • RubyͰը໘ͷఆٛΛॻ͘ˠOpalͰJavaScript ʹม͢Δˠϒϥβ্Ͱಈ͘
Ovtoͷ͘͠Έ • app.stateͱ͍͏ΦϒδΣΫτʹΞϓϦͷશঢ়ଶ͕ೖ͍ͬͯ Δ • state͕มԽͨ͠Βը໘Λߋ৽͢Δ • ʮมԽ͔ͨ͠ʯΛݕࠪ͢Δʹɺݩͷঢ়ଶ͕ඞཁ • ʮগ͠มߋͨ͠ͷʯΛ࡞Δͷ͕ͪΐͬͱ໘
• JSͰͲ͏ͳΜͩΖ͏ʁˠimmer.jsͱ͍͏ͷ͕͋ΔΒ͠ ͍ˠԿ͜Ε໘ന͍ɺRubyʹҠ২Ͱ͖ͳ͍͔ͳ
ྫ todos = [ {id: 1, title: "ཛΛങ͏", done: false},
{id: 2, title: "আػΛ͔͚Δ", done: false}, ] ͜͜ΛUSVFʹ͍ͨ͠ͱ͢Δ
୯७ʹΔͱ͜͏ todos = [ {id: 1, title: "ཛΛങ͏", done: false},
{id: 2, title: "আػΛ͔͚Δ", done: false}, ] todos[1][:done] = true ͜͜ΛUSVFʹ͍ͨ͠ͱ͢Δ
todosΛॻ͖͑ͨ͘ͳ͍࣌ʁ 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
ཧɹɹɹɹݱ࣮ new_todos = todos.map{|x| if x[:id] == 2 x.merge(done: true)
else x end } todos[1][:done] = true
zanzouΛ͏ͱ 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 ˢʮ൪ͷEPOFΛUSVFʹ͢Δʯ͕ͦͷ··ॻ͚Δ ͔ͭΦϦδφϧແࣄ
໊લͷ༝དྷ
None
͔ͬͨʂʁ
૾ͩʜ ͳʹͬ
ΦϒδΣΫτ ഁյతૢ࡞ ϓϩάϥϜ
ରΛૢ࡞͍ͯ͠ΔΑ͏͚ͩͲɺ ݩͷΦϒδΣΫτແࣄ (૾ͳͷͰ) ΦϒδΣΫτ ഁյతૢ࡞ ϓϩάϥϜ ࣮ߦ݁Ռ
2. ZanzouͷΞϧΰϦζϜ ͜ͷΑ͏ͳಈ࡞Λ࣮ݱ͢ΔʹͲ͏͢ΕΑ͍Ͱ͠ΐ͏͔ʁ ZanzouͷΈɺimmer.jsͱ͍͏JavaScriptͷϥΠϒϥ ϦΛࢀߟʹ͍ͯ͠·͢ɻ https://github.com/immerjs/immer
Ұ൪ʮ؆୯ʯͳΓํɹ • ΦϒδΣΫτશମΛෳ͢Δ • ෳͨ͠ͷΛมߋͤ͞Δ • ɿ͍
ྫɿશ෦ෳͯ͠͠·͑ಈ͚͘ Ͳ… UPEPT<> OFX@UPEPT<> 5PEPJE EPOFGBMTF
5PEPJE EPOFGBMTF 5PEPJE EPOFGBMTF 5PEPJE EPOFGBMTF 5PEPJE EPOFGBMTF 5PEPJE EPOFUSVF 5PEPJE EPOFGBMTF 5PEPJE EPOFGBMTF
UPEPT<> OFX@UPEPT<> ڞ༗Ͱ͖Δͱ͜Ζڞ༗͍ͨ͠ 5PEPJE EPOFGBMTF 5PEPJE
EPOFGBMTF 5PEPJE EPOFGBMTF 5PEPJE EPOFGBMTF 5PEPJE EPOFUSVF
खॱ̍ɿϧʔτShadowΛ࡞Δ "SSBZ ͱͷ ΦϒδΣΫτ ૾ 4IBEPX )BTI )BTI GBMTF
GBMTF "SSBZ 4IBEPX JE EPOF JE EPOF TIBEPX<><EPOF>USVF
ઓུ̎ɿࢀর͞ΕͨΒShadowΛฦ͢ "SSBZ ͱͷ ΦϒδΣΫτ ૾ 4IBEPX )BTI )BTI GBMTF
GBMTF "SSBZ 4IBEPX JE EPOF JE EPOF TIBEPX<><EPOF>USVF )BTI 4IBEPX
ઓུ̏ɿॻ͖͑ΒΕͨΒͦͷ͜ͱΛ ͓֮͑ͯ͘ "SSBZ ͱͷ ΦϒδΣΫτ ૾ 4IBEPX )BTI )BTI
GBMTF GBMTF "SSBZ 4IBEPX JE EPOF JE EPOF TIBEPX<><EPOF>USVF )BTI 4IBEPX EPOFΛ USVFʹ͢Δ
ઓུ̐ɿϑΝΠφϥΠζ "SSBZ ͱͷΦϒδΣΫτ )BTI )BTI GBMTF GBMTF
JE EPOF J EPOF ૾ "SSBZ )BTI EPOFΛ USVFʹ͢Δ "SSBZ ฦΓ )BTI USVF JE EPOF
ઓུ̐ɿϑΝΠφϥΠζ "SSBZ ͱͷΦϒδΣΫτ )BTI )BTI GBMTF GBMTF
JE EPOF J EPOF ૾ "SSBZ )BTI EPOFΛ USVFʹ͢Δ "SSBZ ฦΓ )BTI USVF JE EPOF
3. Zanzouͷ࣮ͱ Zanzou͓͓Αͦɺmethod_missingͰग़དྷͯ ͍·͢ɻ͍͍ͩͨಈ͖·͕͢ɺ·ͩ͋Γ ·͢ɻ BasicObject#method_missing
Zanzouͷ࣮ • method_missingΛଟ༻ • https://docs.ruby-lang.org/ja/latest/ method/BasicObject/i/ method_missing.html • ʮଘࡏ͠ͳ͍ϝιου͕ݺΕͨʯͱ͖ͷ ॲཧΛࢦఆͰ͖Δ
αϙʔτൣғ A. JSON࡞Δͷʹ͏Α͏ͳΦϒδΣΫτα ϙʔτ͍ͨ͠ • Hash, Array, String, , true,
false, nil B. ಠࣗΫϥεઃఆΛ͢Ε͑ΔΑ͏ʹ͍ͨ͠ C. ͲͷϝιουΛݺΜͰେৎʹ͍ͨ͠
αϙʔτқ 1. , true, false, nil • immutable(ঢ়ଶΛͨͳ͍ʹมߋ͢Δ͜ͱ͕Ͱ͖ͳ͍)ͷͰ༨༟ 2. String
• mutableͰ͋Δ͚ͲɺίϯςφͰͳ͍ͷͰ؆୯ 3. Hash • ίϯςφ(ଞͷΦϒδΣΫτΛࢠཁૉͱͯͭ͠)ͳͷͰগ͠େม 4. Array • ίϯςφ͔ͭɺΠϯσοΫε͕ͣΕΔέʔε͕͋ΔͷͰ࠷ѱ
Arrayͷ • ࢠཁૉΛഁյͨ͋͠ͱɺͲ͜ʹ͍͍ͤʁ • 3൪ͷཁૉ͕ͩͬͨͣɺdeleteͰ2൪ ʹͳ͍ͬͯΔ͔ • ͦͦԿ൪͔Θ͔Βͳ͍͜ͱ (Array#sample)
Կ͕ࠔΔͷ͔ • ྫɿTODOͷྻ͕͋Δͱ͢Δ • ͋ΔTODOΛมߋ͢Δ߹ɺҎԼ͕ඞཁ • ࢠཁૉΛdup͠ɺมߋ͢Δ͜ͱ • ৽چ2ͭͷྻ͕͋Δ͜ͱ •
৽ྻͷࢠཁૉ͚ͩɺ৽͍͠ͷʹஔ͖Θ͍ͬͯΔ͜ͱ • ↑͜ͷͱ͖ʹΠϯσοΫε͕ඞཁʹͳΔ
ͪͳΈʹimmer.jsͷ߹ • ES6 Proxyͱ͍͏ͷΛ͍ͬͯΔ • ΦϒδΣΫτʹର͢Δset/getΛϑοΫͰ͖ Δ • sort()ͱ͔શͯͷset/get͕ϑοΫ͞ΕΔ(͢ ͍͝)
TPSU ͕෦తʹߦͬͨಈ࡞͕શ෦ϑοΫͰ͖ͯΔˢ ʹࢠཁૉ͕ผͷΠϯσοΫεʹҠಈͨ͜͠ͱΛݕͰ͖Δ
·ͱΊ • ES6 Proxy͍͢͝ • Rubyͷsort()CͰ࣮͞Ε͓ͯΓɺͦͷ෦ಈ࡞ϑοΫͰ͖ ͳ͍ • جຊతͳέʔεͰಈ͍͍ͯΔ •
Δέʔεpending specʹͯ͋͠ΔͷͰ୭͔ઓͯ͠΄͍͠ • 200ߦ͘Β͍ͳͷͰಡΜͰΈΔͱ໘ന͍͔ • https://github.com/yhara/zanzou