Coming Soon…💎 / coming soon

Kaigi on Rails 2020 の基調講演「Coming Soon...💎」の発表スライド https://kaigionrails.org/ #kaigionrails

Transcript

1. @amatsuda Coming Soon...💎 @amatsuda
2. ಥવͰ͕͢ɺ
3. OSS΍Γ͍ͨʂ 🛤 Α͍͘ΖΜͳͱ͜ΖͰ૬ஊ͞ΕΔ
4. ͍ΖΜͳͱ͜Ζ 🛤 Asakusa.rb 🛤 Ӭ࿨γεςϜϚωδϝϯτ͞ΜͷOSSύονձ 🛤 ͍ΖΜͳձࣾ 🛤 Πϯλʔωοτ
5. 🤔
6. ʮ΍Γ͍ͨͳΒ΍Ε͹͍͍ͷ Ͱ͸ʁʯ 🛤 ʮύονΛॻ͘ʯҎ֎ʹ΍Δ΂͖͜ͱ͸ͳ͍ 🛤 ύονΛॻ͘ର৅ͷιϑτ΢ΣΞ͸ੈͷதʹແ਺ʹ ͋Δ
7. 🔜
8. ͨͿΜࠓ͙͢ύονΛॻ͔ͳ͍ ཧ༝͸ٕज़ྗෆ଍ͱ͔Ͱ͸ͳ͍ 🛤 ࢓૊Έ 🛤 Ϟνϕʔγϣϯ 🛤 ετʔϦʔ 🛤 ͖͔͚ͬ
9. ͖͔͚ͬ͸͞·͟· 🛤 ࠓ೔͸ɺ͍ΖΜͳϓϩμΫτΛ঺հ͠ͳ͕ΒɺͦΕ Λॻ͍͖͔͚ͨͬ΍ͦͷͱ͖ߟ͍͑ͯͨ͜ͱͳͲΛ ͝঺հ 🛤 OSS։ൃʹڵຯ͕͋Δ͚Ͳ࢝Ί͔͕ͨΘ͔Βͳ ͍ɺܧଓͰ͖ͳ͍ɺͱ͍͏ํͷࢀߟʹͳΕ͹
10. ͱ͍͏ײ͡Ͱɺࠓ೔͸ࣗຫΛ
 ͠ʹདྷ·ͨ͠ʂ 🛤 ࣗຫͱࣗըࣗࢍ 🛤 RubyKaigiͰ͍ͭ΋εϐʔΧʔͷօ͞Μʹ͓ئ͍
 ͯ͠Δ΍ͭ
11. self 🛤 name: Akira Matsuda 🛤 GitHub: @amatsuda 🛤 Twitter: @a_matsuda
12. ੈքతʹ༗໊ͳϓϩάϥϚʔ
 ͸͡Ί·ͨ͠
13. ոจॻ
14. https://jp.quora.com/ϓϩάϥϛϯάʹ͓͍ͯ- ੈքతʹ༗໊ͳ೔ຊਓ͸͍/answers/141576838
15. https://twitter.com/joker1007/ status/1157578882184183808
16. ͦΜͳ͜ͱͳ͍Ͱ͢ʼʻ 🛤 ݺ͹ΕΕ͹Ͳ͜Ͱ΋ߦ͘ؾຬʑͳͷʹࠃ಺͔Β͸
 ͥΜͥΜ੠͔͚ͯ΋Β͑ͳ͍͚ͩͳΜͰ
17. Rubyίϛολʔ
18. Railsίϛολʔ
19. ͔ͤͬ͘ͷୈ1ճKaigi on RailsͳͷͰ ͪΐͬͱ͚ͩRailsͷ࿩
20. Railsͱࢲ
21. ݹגίϯτϦϏϡʔλʔ 🛤 https://contributors.rubyonrails.org/
22. https:// contributors.rubyonrails.org/
23. SinceͷཝΛݟΔͱΘ͔Δ
24. 13೥໨
25. ͜ͷதͰɺݱ໾Ͱίϛοτ
 ͯ͠Δਓ 🛤 ҾୀΛද໌ͨ͠΋͘͠͸3೥Ҏ্ίϛοτͯ͠ͳ͍ ਓΛফ͜͠ΜͰΈΔ
26. ݱ໾
27. Railsίϛολʔ͸ͲΜͲΜਓ͕
 ೖΕସΘ͍ͬͯΔ͜ͱ͕Θ͔Δ 🛤 ྺͷઙ͍ϝϯόʔ͕ͨͪ׆༂͍ͯ͠Δ
28. RailsϓϩδΣΫτ͸ɺ௕೥ଓ͍͍ͯΔΘΓ ʹɺ͔ͳΓ݈શʹӡӦ͞Ε͍ͯΔͷͰ͸ͳ͍͔
29. Ruby΍Railsͷपลͷ͍Ζ͍Ζ
30. Asakusa.rbओ࠵ͯ͠·͢
31. Asakusa.rbओ࠵ͯ͠·͢
32. ΦϯϥΠϯͰຖिՐ༵೔ʹ΍ͬͯΔ ͷͰ͓ؾܰʹ༡ͼʹདྷ͍ͯͩ͘͞
33. RubyKaigiͷ
 νʔϑΦʔΨφΠβʔ΍ͬͯ·͢
34. RubyKaigi Takeout 2020͝ࢀՃ ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
35. RubyKaigi 2021 🛤 https://rubykaigi.org/2021
36. Kaigi on Railsͱࢲ
37. ͳΜ͔RailsͷΠϕϯτ΍Γ͍ͨͬͯݴͬͯΔେ૔͞Μ Λogijun͞ΜʹҾ͖߹ΘͤͯKaigi on Railsͷ໊લΛ ݱ୅ʹોΒͤͨͷΦϨΦϨ 🛤 ͱ͍͏࿩͸ઌिͷۜ࠲RailsͰ΋͏΍ͬͨͷͰলུ
38. झຯͰΑ͘ύονΛ
 ॻ͍͍ͯ·͢
39. ࠓिɺͱ͋Δ͓࢓ࣄͷRailsΞϓϦ ͷϦϙδτϦͰूܭͯ͠Έͨ݁Ռ 🛤 Railsຊମ͓ΑͼrailsΦʔΨχθʔγϣϯͰϝϯς͍ͯ͠Δgemͨͪ (16ݸ) 🛤 ࣗ෼͕࡞ͬͨ΋ͷ (6ݸ) 🛤 ϝϯςφΛ΍ͬͯΔ(= ίϛοτݖΛ͍࣋ͬͯΔ)΋ͷ (4ݸ) 🛤 ্هҎ֎ͷ͏ͪɺաڈʹ1ͭҎ্Կ͔Λίϛοτͨ͜͠ͱ͕͋Δ΋ͷ (86ݸ) 🛤 ະίϛοτͷ΋ͷ (211ݸ)
40. ΞϓϦͰbundle͍ͯ͠Δgemͷ͏ͪ 112/323 ʹ͸Կ͔͠Βίϛοτͯͨ͠ 🛤 3෼ͷ1ڧ͙Β͍ 🛤 ͜Μͳײ͡Ͱɺͱʹ͔͍͘ΖΜͳgemΛಡΈॻ͖
 ͠·͘ΔελΠϧ
41. ͍ΖΜͳਓ͕ॻ͍͍ͨΖΜͳίʔυΛ ಡΈॻ͖͢Δͷ͸ָ͍͠ͷͰ͓͢͢Ί
42. ͦͷͨΊʹ͸ɺ೔ࠒ͔Β͍ΖΜͳίʔυΛಡΈ ॻ͖͢Δ·ͰͷϋʔυϧΛԼ͓͛ͯ͘ͷ͕େࣄ 🛤 ಡΈ͍ͨɺͱࢥͬͨ࣍ͷॠؒʹ͸αοͱಡΈ࢝ΊΒ ΕΔΑ͏ʹ 🛤 ͦͷ৔Ͱ͙͢ʹύονΛॻ͖࢝ΊΒΕΔΑ͏ʹ
43. OSSϥΠϒϥϦͷίʔυΛಡΜͰ ύονΛॻ͘ϋʔυϧΛԼ͛Δʹ͸ 🛤 ·ͣ͸gem-src
44. 💎 gem-src 🛤 ͍ΖΜͳgemͷιʔείʔυ͕ϞϦϞϦऩूͰ͖Δ ΍ͭ 🛤 gem installίϚϯυΛ֦ுͯ͠ɺΠϯετʔϧͷ ͍ͭͰʹgemͷιʔείʔυΛউखʹखݩʹclone ͯ͘͠ΕΔΑ͏ʹ͢Δ
45. ࠓேɺେ͖ͳػೳ௥ՃΛ
 ͠·ͨ͠
46. gem-src as a Bundler Plugin! % bundler plugin install gem-src
47. ࠓ೔·Ͱࠔ͍ͬͯͨ͜ͱ 🛤 ͠͹Β͘લͷBundlerͷ࢓༷มߋͷ͍ͤͰɺ Bundlerܦ༝ͰΠϯετʔϧ͞ΕͨgemͰ͸after- install hook͕૸Βͳ͘ͳ͍ͬͯͨ
48. BundlerϓϥάΠϯԽ͢Δ͜ͱͰɺBundlerܦ༝ͰΠϯ ετʔϧ͞Εͨgemʹ΋gem-src͕ޮ͘Α͏ʹͳͬͨ
49. RubyGemsϓϥάΠϯ݉
 rbenvϓϥάΠϯ݉BundlerϓϥάΠϯ 🛤 1ϦϙδτϦͰτϦϓϧϓϥάΠϯʂ 🛤 ͜ΜͳϓϩμΫτ͸ͨͿΜੈքॳͩͱࢥΘΕΔ 🛤 ͱ͍͏͔RubyGemsϓϥάΠϯ΋rbenvϓϥάΠϯ ΋BundlerϓϥάΠϯ΋ϚΠφʔ͗ͯ͢୭΋࡞ͬͯ ͳ͍
50. ࠓ೔͔Β͸ɺrbenvͱbundlerͷ྆ํ ͱ΋ʹ૊ΈࠐΜͰ͓͘ͷ͕ਪ঑ઃఆ % git clone https://github.com/amatsuda/gem-src.git "$(rbenv root)/plugins/gem-src" 
 % bundler plugin install gem-src
51. ར༻͍ͯ͠Δgemͷιʔείʔυ͸શͯखݩʹ
 ஔ͍͓͚ͯΔΑ͏ʹͳͬͯɺύονΛൃࣹ͢Δ·Ͱ ͷϦʔυλΠϜ͕ܶతʹॖ·Δ 🛤 ๻ͷखݩͰ͸ਪఆ2000ݸఔ౓͕cloneࡁΈͰɺ
 ͍ͭͰ΋ύον͕ॻ͚Δঢ়ଶʹͳ͍ͬͯΔ 🛤 ͜Ε͕ແ͍ͱOSS׆ಈ͕Ͱ͖ͳ͘ͳΔ͘Β͍ศར
52. ͜ΕͰࠓ೔͔Βύον͕ૉૣ͘ ॻ͚ΔΑ͏ʹͳΔ͸ͣͰ͢
53. 🔜
54. ࠓ೔͔ΒύονΛͨ͘͞Μ
 ॻ͍͍͖ͯ·͠ΐ͏
55. ͦΕ͔Βɺ๻ͷ৔߹ɺଞਓͷϓϩμΫτʹύονΛ ౤͛Δ͚ͩ͡Όͳͯ͘ɺझຯͰΑࣗ͘࡞ͷgemΛ ࡞͍ͬͯ·͢
56. ࢓ࣄฑɺओʹʮRailsϓϥΪϯʯ
57. "Rails Plugin" 🛤 ࢮޠʁ 🛤 ࠷ۙͰ͸୯ʹ"gem"ͬͯݴΘΕͯΔʁ
58. gem != Rails Plugin
59. ౰ͨΓલ͚ͩͲɺੈͷதʹ͸Railsͷ֦ ுҎ֎ͷgem΋͋Δ
60. 💎 rfd
61. rfd 🛤 RubyͰ࡞ͬͨFD(ϑΝΠϥʔ)ͷΫϩʔϯ
62. ݟͲ͜Ζ 🛤 rfd/commands.rb 🛤 Կ͔Ωʔ͕ԡ͞ΕΔͱɺͱʹ͔ͦ͘ͷΩʔͷ໊લͷ ϝιου͕࣮ߦ͞ΕΔ
63. ͖͔͚ͬ 🛤 ͜ͷcommands.rbͷ࢓૊ΈΛࢥ͍͍ͭͯ͠·ͬͨ ͷͰ࣮૷ͯ͠Έͨ͘ͳͬͯ࡞ͬͨ
64. ϝϯς 🛤 2ը໘ରԠͱ͔͍ͨ͠ͱࢥ͍ଓ͚ͯ਺೥ؒ์ஔத…… 🛤 ։ൃΛख఻ͬͯ͘ΕΔํืूத
65. gem != Rails Plugin 🛤 ࠓ౓͸ٯʹɺgemͰ͸ͳ͍Rails pluginͷύλʔϯ
66. ੲ͸Railsͷ֦ு͸gem͡Ό
 ͳ͔ͬͨ
67. 💎 i18n_generators
68. i18n_generators 🛤 Rails I18nͷϦιʔεϑΝΠϧΛࣗಈ຋༁Ͱੜ੒͠·͘Δ΍ͭ 🛤 ๻͕ॳΊͯࣗ෼Ͱ࡞ͬͨRails plugin 🛤 (ͦΕҎલʹ͸ଞਓ͕࡞ͬͨ΋ͷΛforkͯ͠ϝϯςͱ͔͙ͯͨ͠Β͍) 🛤 2008೥ 🛤 GitHubͱ͔Asakusa.rbͱ͔͕Ͱ͖ͨ೥
69. First CommitΛݟͯΈΔͱ…… 🛤 https://github.com/amatsuda/ i18n_generators/commit/7a9b45c
70. Installation
71. gem install ͱ͔ bundle install ͡Όͳ͍ʂ 🛤 ౰࣌͸gem͡Όͳ͔ͬͨ͜ͱ͕Θ͔Δ
72. Rails pluginͱͯ͠͸ൺֱతྺ࢙ ͕௕ͯͣͬ͘ͱϝϯςͯ͠ΔͷͰ 🛤 Ruby 1.8ʙ3.0ͷશͯͷόʔδϣϯRubyͰಈ͘ 🛤 Rails 3.0ʙ6.1ͷશͯͷόʔδϣϯRailsͰಈ͘ 🛤 ݱଘ͢ΔRails I18nؔ࿈ϓϩμΫτͱͯ͠͸࠷ݹͷ ΋ͷ͔΋͠Εͳ͍
73. ࡞͖͔͚ͬͨͬ 🛤 Rails I18nϓϩδΣΫτʹ࠷ॳ͔ΒؔΘͬͨ೔ຊਓͩͬͨ 🛤 ౰࣌޿͘࢖ΘΕ͍ͯͨ gettext-rails ͷϦιʔεΛϕʔεʹͯ͠ɺຊମଆ ͷ ja.yml Λॻ͍ͨ 🛤 ΞϓϦ಺ͷYAML͸Ωʔͷ໋໊نଇ͕ܾ·ͬͯΔΜ͔ͩΒࣗಈੜ੒Ͱ͖ ΔͷͰ͸ʁͱࢥͬͨͷͰ΍ͬͯΈͨ 🛤 Rails I18n͢ΔͳΒ͜͏͍͏΋ͷ͕ඞਢͰ͸ʁͱࢥͬͯ࡞͚ͬͨͲɺ
 ҙ֎ͱ޿·Βͳ͔ͬͨ
74. ٯʹɺ࡞ऀ͕ࢥͬͨҎ্ʹ
 ޿·ͬͯ͠·ͬͨ΋ͷ
75. 💎 kaminari
76. kaminari 🛤 ϖʔδωʔγϣϯ͢Δ΍ͭ 🛤 2011೥
77. ࡞͖͔͚ͬͨͬ 🛤 ౰࣌σϑΝΫτͩͬͨwill_paginate͕Rails 3ʹ
 ͳ͔ͳ͔ରԠͯ͘͠Εͳͯ͘ࠔͬͯͨ 🛤 ͦͷ͜Ζ࡞ऀͨͪ͸GitHub͍ͬͯ͏ελʔτΞοϓ Λ૑ۀͯͯ͠๩͔ͬͨ͠ 🛤 Rails 3ͷ৽ػೳΛ࢖͑͹΋ͬͱ͏·͘࡞ΕΔؾ͕ͨ͠
78. Rails 3ͷ৽ػೳ 🛤 Active RecordͷϝιουνΣΠϯํࣜͷ৽API 🛤 Rails Engine
79. Rails 3ͷ৽ػೳʹ͍ͭͯͷৄ͍͜͠ͱ͸ ౰࣌ WEB+DB Press Vol. 58 ʹॻ͍ͨ 🛤 ૯ूฤͷDVDΛങ͑͹ࠓͰ΋ಡΊ·͢
80. ݱଘ͢ΔதͰ͸ੈքͰԿ൪໨͔ʹ ݹ͍Rails Engine͔΋͠Εͳ͍
81. kaminari͍ͬͯ͏;໊͚ͨ͟લ 🛤 ίʔυ͸ॻ͚ͨΜ͚ͩͲɺ໊લ͕ܾΊΒΕͳͯ͘
 2ि͙ؒΒ͍ϦϦʔεͰ͖ͳ͔ͬͨ 🛤 ౦ژRubyձ͔ٞͳΜ͔Ͱhsbt͞Μʹ͖ͯͱ͏ʹ
 ܾΊͯ΋Βͬͨ
82. ڞಉϝϯςφ 🛤 @yuki24 🛤 ౰࣌Issue͕100ݸͱ͔ཷ·ͬͯΔͷΛݟΔʹݟ͔Ͷ ͯɺAsakusa.rbͷmeetupͰʮख఻͍·͠ΐ͏ ͔ʁʯͬͯݴͬͯ͘Εͨ
83. ͻͲ͍ίʔυ 🛤 ·͍͋Ζ͍Ζྺ࢙తܦҢ͕͋ΔΜͰ͢Α 🛤 ࠓͱͳͬͯ͸ݟͲ͜Ζ͸ಛʹͳ͍͠ɺίʔυ͸৭ʑ ͻͲ͍ΜͰಛʹಡΉඞཁ͸ͳ͍
84. 2011೥ͭͳ͕Γ 🛤 2011೥ʹ࡞ͬͨଞͷgem
85. 💎 action_args
86. action_args 🛤 Railsͷίϯτϩʔϥʔ͕MerbΈ͍ͨʹͳΔ΍ͭ 🛤 ͜ΕφγͰ͸RailsͳΜ͔࢖͑ͳ͘ͳΔ͙Β͍ศར ͳ΍ͭ
87. ࣗ෼͕࡞ͬͨgemͷதͰҰ൪޷͖ ͳ΍͔ͭ΋͠Εͳ͍
88. ࡞͖͔͚ͬͨͬ 🛤 Rails 3ͷίϯτϩʔϥʔͷίʔυ͕ؾʹ৯Θͳ ͔͔ͬͨΒ
89. Rails 2 + Merb = Rails 3 🛤 ίϯτϩʔϥʔʹؔͯ͠͸ɺྑ͘ͳ͍ํͷAPIΛ
 બ୒ͯ͠͠·ͬͨ 🛤 ͜͜ͰMerbํࣜΛαϙʔτͰ͖ͳ͔ͬͨͷ͸Rails ͷྺ্࢙਺গͳ͍DHHͷ൑அϛεͩͱࢥ͏
90. ݟͲ͜Ζ 🛤 https://github.com/asakusarb/action_args/ commit/895b1ad
91. "using Refinements in order not to reveal our plugin internal methods"
92. ͜ͷgemͷதͰ͔͠࢖Θͳ͍௒ϓϥΠϕʔτͳ ϝιουΛੜ΍ͨ͢ΊʹrefinementsΛ׆༻ 🛤 ͜͜Ͱ͸ɺActionController::Base ʹϓϥΪϯ಺ ෦༻ͷϩδοΫΛ௥Ճ͍ͯ͠ΔΜ͚ͩͲɺͦΜͳ΋ ͷ͕ϢʔβʔͷΞϓϦʹ࿙Εग़ͪ͠Ό͏ͱΧοίѱ ͍ 🛤 ͦ͜ͰɺϑΝΠϧείʔϓͳϝιουΛݺͼ͍ͨͱ ͜ΖͰ͚ͩੜ΍͢Α͏ʹ͢Δ
93. 2015೥8݄ 🛤 ͜ͷίϛοτ͕ߦΘΕͨ2015೥8݄ʹԿ͕͋ͬͨͷ ͔ʁ
94. ͖͔͚ͬ͸ @_ksss_ ͞Μͷπ Πʔτ
95. https://twitter.com/_ksss_/ status/631458253688340480
96. https://twitter.com/a_matsuda/ status/631470723974873093
97. https://twitter.com/_ksss_/ status/631478188414144512
98. https://twitter.com/_ksss_/ status/631589269283303424
99. https://twitter.com/a_matsuda/ status/631608168175415296
100. ͪͳΈʹཌ೥ʹ͸Railsʹ΋ೖΕͨ 🛤 https://github.com/rails/rails/commit/ 571f0f32 🛤 ͜Ε͕Rails্࢙ॳrefinements
101. https://github.com/rails/ rails/commit/571f0f32
102. Refinements 🛤 ͓࢓ࣄͷRailsΞϓϦͰ͸΄ͱΜͲ࢖͍ಓ͕ͳ͍͚ ͲɺϥΠϒϥϦ΍ϑϨʔϜϫʔΫͷ։ൃʹ͸͛͢ʔ ศར
103. ͓ͦΒ͘͜ͷػೳΛ͏·͘࢖͏ͱɺΊͪΌΊ ͪΌ៉ྷͳϑϨʔϜϫʔΫΛ࡞Δ͜ͱ΋Մೳ͔΋ 🛤 public APIϝιουҎ֎͸ϢʔβʔʹԿ΋ݟ͑ͯͳ ͍Έ͍ͨͳ 🛤 Ͱ΋Rails͸͍·͞Βແཧ͔ͳ……
104. ͦΕ͔Βɺ2011೥ʹ࡞ͬͨ΋ͷΛ ΋͏ͻͱͭ
105. 💎 active_decorator
106. active_decorator 🛤 ͍ΘΏΔσίϨʔλʔ 🛤 Active Model͕஀ੜͨ͜͠ͱ΋͋ͬͯɺ Presenterύλʔϯͱ͔ͦ͏͍͏ͷ͕ྲྀߦͯͨ͠ 🛤 Draper͕Ͱ͖ͨͷ΋͜ͷ͜Ζ
107. ͖͔͚ͬ 🛤 Draperͷख৮Γ͕͋·Γʹ΋RubyΒ͘͠ͳͯ͘
 ؾ࣋ͪѱ͍ͷͰɺࣗ෼Ͱ΋ͬͱײ৮ͷྑ͍΋ͷΛ ࡞ͬͨ 🛤 ਖ਼͍͠ઃܭͱਖ਼͍࣮͠૷Λࢥ͍͍ͭͯ͠·ͬͨ
108. ਖ਼͍͠ઃܭͱਖ਼͍࣮͠૷ 🛤 view helperͳΜ͔ͩΒɺhelperͱಉ༷viewͷதͰ
 ͚ͩ༗ޮʹͳΔ΂͖
 => 🛤 ͋ɺͱ͍͏͜ͱ͸ɺview_assigns ͷλΠϛϯάͰҾ ͖౉͠ର৅ͷivarΛObject#extend͢Ε͹͍͍ͷͰ ͸ʂ
109. view_assignsͱ͔;ͭ͏஌Βͳ͍ ͱࢥ͏ΜͰ͚͢Ͳɺ 🛤 ͜ͷAPIͷ஌͕ࣝ͋Δ͔ͳ͍͔͕ɺDraperͱͷ
 ख৮ΓͷࠩΛੜΜͩ
110. WEB+DB Press Vol.58ͷಛू1Λॻͨ͘Ίʹ Rails 3ͷίʔυΛಡΈ·ͬͨ͘ͷ͕࣮݁ͨ͠
111. ख৮Γ 🛤 ;ͭ͏ͷRubyͷϞδϡʔϧΛૉ௚ʹ࢖͏͚ͩ 🛤 ಛघͳجఈΫϥεΛܧঝͱ͔͠ͳ͍ 🛤 ͓·͡ͳ͍Λ֮͑ͳͯ͘ྑ͍ 🛤 RubyͷύϫʔΛͦͷ··࢖͏
112. ࣅͨΑ͏ͳίϯηϓτͷ΋ͷΛ
 ΋͏1ݸ
113. 💎 jb
114. jb 🛤 JSONΛ࡞ΔͨΊͷςϯϓϨʔτΤϯδϯ 🛤 jbuilder͍ͬͯ͏DSL͕ԚΒͯ͘͠࢖͍ํ͕֮͑
 ʹ͍͘΍ͭͷalternative
115. ίϯηϓτ 🛤 JSONͱRubyͷHash͍͍ͬͯͩͨҰॹͩΑͶ 🛤 ςϯϓϨʔτͷதͰจࣈྻΛ੾ͬͨுͬͨͯ͠ JSONͬΆ͍จࣈྻΛ૊ΈཱͯΔΜ͡Όͳͯ͘ɺ HashͷΠϯελϯεΛ࡞ͬͨΒͦΕΛJSONʹ͠ ͯ͘ΕΔ΄͏͕௚ײతͩ͠ے͕ྑ͍ͷͰ͸ʁ
116. ઃܭͱ࣮૷ 🛤 Action ViewͰ͸1ຕ1ຕͷςϯϓϨʔτ͕ίϯύΠϧ͞Εͨ ΋ͷ͕ϝιουͱͯ͠ఆٛ͞ΕΔ 🛤 jbͰ͸ίϯύΠϧ΋Կ΋ͳͯ͘ɺςϯϓϨʔτʹॻ͍ͨ΋ͷ ͕ͦͷ···ΔͬͱϝιουbodyʹͳΔ 🛤 ͦͷϝιου͕HashͷΠϯελϯεΛฦ͢Α͏ʹ͢Ε͹͍ ͍͚ͩɻͱʹ͔͘;ͭ͏ͷRubyΛॻ͚͹ྑ͍
117. ϝϦοτ 🛤 ṖͷDSLΛ֮͑ͳͯ͘ྑ͍ 🛤 Կ΋ͯ͠ͳ͍ͷͰ଎͍ 🛤 jbuilderΑΓ΋ϑΝΠϧ໊ͷ֦ுࢠ͕୹͍
118. ݟͲ͜Ζ 🛤 template handlerͷԿ΋΍ͬͯͳͬ͞΀Γ
119. lib/jb/handler.rb
120. handler͕Կ΋΍ͬͯͳ͍ςϯϓϨʔτ
 ΤϯδϯΛ΋͏1ݸ
121. 💎 string_template
122. ݱଘ͢ΔRubyͷςϯϓϨʔτ
 ΤϯδϯͷதͰ͸Ӊ஦࠷଎
123. jbͱಉ͡ײ͡ͰɺςϯϓϨʔτ͕
 ͦͷ··ϝιουbodyʹͳΔ 🛤 ͦ͜Ͱฦͨ͠String͕ͦͷ··HTMLͱ͔ʹͳΔ
124. ςϯϓϨʔτ͕ΫΦʔτ͞Εͨ΋ͷ͕ ·Δ͝ͱ1ຊͷStringϦςϥϧʹͳΔ 🛤 ແବͳbufferΦϒδΣΫτ͕࢖ΘΕͣʹҰܸͰ String͕૊ΈཱͯΒΕΔͷͰੈք࠷଎
125. ͨͩͷRubyͳͷͰɺಛघͳຒΊࠐΈ
 ه๏ͱ͔͸Ұ੾ͳ͍
126. <%= %> ͱ͔ແͯ͘େৎ෉ͳͷʁ
127. RubyͷStringʹ͸ #{} ͷ interpolation ͕͋ΔΜͰ͢Αʂ 🛤 ͜ΕͰ͚ͬ͜͏ͳΜͱ͔ͳΔ
128. ࢖͍Ͳ͜Ζ 🛤 layoutϑΝΠϧͱ͔Έ͍ͨͳɺΊͬͪΌrender͞ ΕΔ͚Ͳ͋·Γසൟʹ͍͡Βͳ͍Α͏ͳ΋ͷ͸͜Ε Ͱॻ͍͓ͯ͘ͱύϑΥʔϚϯε͕Ք͛Δ͔΋
129. ݟͲ͜Ζ 🛤 ΍ͬͺΓtemplate handlerͷԿ΋΍ͬͯͳͬ͞΀ Γ
130. lib/string_template/ handler.rb
131. Τϯδϯͭͳ͕Γ 🛤 Τϯδϯ͸ΤϯδϯͰ΋ɺࠓ౓͸ςϯϓϨʔτΤϯ δϯ͡Όͳͯ͘ Rails Engine
132. 💎 heavens_door
133. heavens_door 🛤 ΈΜͳେ޷͖Capybaraͷςετίʔυ͕ɺϒϥ΢ βͷૢ࡞͔Βੜ੒Ͱ͖ΔEngine
134. ໊લ 🛤 ࿐൐ઌੜͷελϯυ 🛤 ͳΜ͔ͦΕͬΆ͍ؾ͕ͨ͠Μ͚ͩͲɺ·͋Θ͔Γʹ ͔ͬͨ͘Ͱ͢Ͷ
135. ͖͔͚ͬ 🛤 ZOZOςΫϊϩδʔζ͞Μͷ৽نҊ݅ͰɺΈΜͳͰ systemςετॻ͜͏͍ͥͬͯ͏͜ͱʹͳͬͯ 🛤 Ͱ΋खॻ͖Ͱ͍͍ͪͪॻ͘ͷ͸େมͩͬͨͷͰ
136. ࣮͸ϒϥ΢βૢ࡞Ϟʔυ͚ͩ͡Όͳͯ͘ ίϚϯυϥΠϯϞʔυ΋͋ͬͨΓ͢Δ
137. ίϚϯυϥΠϯϞʔυʁ 🛤 ࡞ͬͨຊਓʹ͔͠࢖͍ํ͕Θ͔Βͳ͍πʔϧʹͳΓ ͦ͏ͳͷͰ৸͔ͤͯ͋Δ
138. ઌߦݚڀ 🛤 ͜ͷϒϥ΢β্ͷૢ࡞Λه࿥ͯ͠capybaraͷίʔ υΛు͘ػೳ͸ɺ2010೥ʹ࡞ͬͨhocus_pocusͬ ͍ͯ͏Rails Engine pluginͷػೳͱͯ͠طʹ࣮૷ ࡁΈͩͬͨ΋ͷ
139. ͜Μͳ;͏ʹxx೥ܦ͔ͬͯΒੲॻ͍ͨ ίʔυͷժ͕ग़ͨΓ͢Δ͜ͱ΋͋Δ 🛤 ௕೥ίʔυΛॻ͖ଓ͚ͯΔͱΞυόϯςʔδ͕͋ͬ ͨΓ͢Δɺͱ͍͏ࣄྫ
140. 💎 hocus_pocus
141. hocus_pocus 🛤 WikiΈ͍ͨͳײ֮Ͱɺϒϥ΢β্Ͱૢ࡞ͨ͠Βαʔ όʔ্Ͱϖʔδ͕࡞ΕΔRails Engine
142. ࡞Γ࢝Ίͨͷ͸2010೥ 🛤 Kaminari͕Engineͱͯ͠͸૬౰ݹ͍͖ͬͯͬ͞ ݴ͚ͬͨͲɺͦΕΑΓݹ͔ͬͨ 🛤 ͍͢͝Φʔύʔπ͔΋͠Εͳ͍
143. ͍·͍ͪྲྀߦΒͳ͔ͬͨ…… 🛤 UI͕ϔϘ͗ͨ͢ 🛤 πʔϧࣗମͷ֓೦͕೉͗ͨ͢͠ 🛤 υΩϡϝϯτ͕ແͩͬͨ 🛤 ΍Γ͔ͨͬͨ͜ͱ͸Ͱ͖ͦ͏ʂͬͯࢥͬͨΒͳΜ͔ ๞͖ͨ
144. ͍͍ͩͨͰ͖ͨʂ => ͪΌΜͱ࢖͑ Δ·Ͱ࡞ΓࠐΉͷ͕ۤख
145. ίϯηϓτ͕ಛघͩ͠࢖͍ํ΋೉ղͰɺ࡞ͬͨ ຊਓʹ͔͠࢖͍ํ͕Θ͔Βͳ͍πʔϧʹͳͬͯ ͠·ͬͨ
146. ͜ͷϓϩμΫτ͕ٴ΅ͨ͠Өڹ 🛤 Railsඪ४ͷweb-consoleΛΠϯεύΠΞ 🛤 https://github.com/rails-girls-summer-of- code/summer-of-code-2014/wiki/Project- ideas#conductor-web-based-assistant-for- development
147. ࡞ͬͨߕ൹͸͋ͬͨΈ͍ͨ 🛤 ݁ہweb-console͸΍ͬͯΔ͜ͱ͸ͥΜͥΜҧ͏ ͚Ͳ……
148. Capybaraؔ࿈ͷϏδϡΞϧܥͷ EngineΛ΋͏1ͭ (͋ͱ͍ͭͰʹݴ͏ͱϓϩάϨۂ໊ͭͳ͕Γ)
149. 💎 roundabout
150. roundabout 🛤 ը໘ભҠਤੜ੒πʔϧ
151. ը໘ભҠਤͷੜ੒ 🛤 ࣮૷ͱͯ͠͸CapybaraͷϞϯΩʔύον 🛤 ςετίʔυதʹCapybaraͰൃੜͨ͠ϦΫΤετ ͷભҠΛશ෦ه࿥͢Δ 🛤 ͜ΕΛͭͳ͛ͯֆʹ͢Δͱը໘ભҠਤʹͳΔ
152. ͜Μͳײ͡(RedmineϓϩδΣΫτͰ ࣮ߦͨ݁͠Ռ)
153. ਤʹ͸ςετ͕ॻ͔Ε͍ͯΔ
 ΋ͷ͔͠ग़ͯ͜ͳ͍ 🛤 ͭ·Γɺ͋ΔछͷςετΧόϨοδతͳ΋ͷ͕Մࢹ Խ͞ΕΔπʔϧͰ͋Δͱ΋ݴ͑Δ
154. ΞΠσΞ͸͓΋͠Ζ͍͠ɺϙςϯγϟϧ͸͋Δ ؾ͕͢ΔΜ͚ͩͲɺ͋·Γ࢖ΘΕͯΔखԠ͑͸ ͳ͍͔΋ 🛤 ͜ΕΛػʹͥͻ͝ར༻͍ͩ͘͞
155. ΧόϨοδؔ࿈ͭͳ͕ΓͰ
156. 💎 per_file_coverage (unreleased)
157. per_file_coverage (Ծ) 🛤 ςετ࣮ߦ࣌ʹɺΞϓϦΛߏ੒͢Δ֤ϑΝΠϧ͕
 Ͳͷςετ͔Βݺͼग़͞Ε͍ͯΔ͔(ͱɺͦͷٯ)Λ
 શ෦ચ͍ग़ͯ͠ՄࢹԽ͢Δ
158. ࣮૷ͱͯ͠͸SimpleCovͷ
 ϓϥάΠϯ 🛤 (ͨͩ͠SimpleCovʹ͸ϓϥάΠϯͳͲͱ͍͏֓೦ ͸ͳ͍)
159. ஍ࠈͷϞϯΩʔύον 🛤 ͦ͏͍͑͹͍͓ͪ͏ SimpleCov ͷίϛολʔͰ͸ ͋ΔͷͰɺ֦ு͕͠΍͍͢Α͏ʹϑΟʔυόοΫ͙ Β͍͸͍͖͍ͯͨ͠
160. RubyͷCoverageϞδϡʔϧΛ
 ར༻
161. ͖͔͚ͬ 🛤 ANDPADࣾͷͦͦ͜͜ͷن໛ͷطଘΞϓϦʹࢀը ͯ͠ɺʮ͜ͷίʔυ͸ͲͷspecϑΝΠϧ͔Βςε τ͞ΕͯΔΜͩΖ͏ʁʯͱ͔ɺٯʹʮ͜ͷspec͸ Ͳ͜Β΁ΜͷϑΝΠϧΛςετͯ͠ΔΜͩΖ͏ʯͱ ͔஌Γͨ͘ͳͬͨͷͰ
162. application_controller͚ͩͰ΋300ݸͱ͔͋Δ ͷͰɺ΍ͬͺ͜͏͍͏ͷ͕஌Γͨ͘ͳΔΜͰ͢Α
163. Ξ΢τϓοτྫ
164. ͔͠͠ɺgem͸·ͩͳ͍…… 🛤 HTML͕ڊେԽͨ͠৔߹ͷύϑΥʔϚϯε໰୊͕
 ౗͍ͤͯͳ͍ 🛤 ໊લ͕ܾ·͍ͬͯͳ͍ʂ
165. ୭໊͔͍͍લΛ͚͍ͭͯͩ͘͞ 🛤 ͓ئ͍͠·͢
166. Coming Soon...💎
167. ࠷ۙͷ͓࢓ࣄؔ࿈Ͱ࡞ͬͨ΋ͷΛ ΋͏1ͭ
168. 💎 lightweight_attributes
169. lightweight_attributes 🛤 Active RecordͷϞσϧͷΠϯελϯεੜ੒Λۃྗ ܰ͘͢ΔͨΊͷ͑͛ͭͳ͍ϞϯΩʔύον
170. ARͷϞσϧͷΠϯελϯεੜ੒ 🛤 AR 4͙Β͍Ͱೖͬͨtype castingͱ͔͍͏୭΋࢖ͬͯͳ ͍ػೳͷͨΊʹٸܹʹॏͨ͘ͳͬͨ 🛤 ͱʹ͔͘DB͔ΒϞσϧΛΨόοͱҾͬுͬͯฦ͚ͩ͢Έͨ ͍ͳAPIͱ͔ͩͱɺ͕͜͜ϘτϧωοΫʹͳΔ 🛤 RubyϨϕϧͰ͸ɺಛʹTimeతͳ΍ͭͷparse͕஗͔ͬͨ Γ͢Δ
171. RubyͰTimeతͳ΍ͭͷparse͕ ଎͘ͳΔͱ͍͍ͳ͊ 🛤 https://bugs.ruby-lang.org/issues/16005
172. https://bugs.ruby-lang.org/ issues/16005
173. ͱ΋͋Εɺ lightweight_attributes ʹ͍ͭͯ
174. sponsored by ΞΧπΩ 🛤 ࠓ೥͔Βnobuͷύτϩϯʹͳͬͨ͋ͷΞΧπΩࣾ Ͱ͢ʂ
175. ίʔυ͕͑͛ͭͳ͗ͯ͢͞
 ϝϯςෆೳ 🛤 ͜ͷ΁Μͷίʔυ͸Railsͷόʔδϣϯ͝ͱʹͥΜ ͥΜҧͬͯͯɺෳ਺όʔδϣϯରԠͱ͔Ϛδແཧ
176. ͱ͍͏͜ͱͰɺ·ͱ΋ʹϝϯς ͞Εͯͳ͍ͷͰར༻͸ඇਪ঑
177. type castingΛ஗Ԇͤ͞Δͱ͍͏ ΞΠσΞ 🛤 kamipo͞Μ͕͏·͍͜ͱरͬͯActive Record 6.1ʹίϛοτͯ͘͠Ε͔ͨΒ΋͏͓ଂೖΓͰ͍͍͔ ͳ……
178. Rails 6.1
179. Coming Soon...💎
180. ΞΧπΩ͞ΜεϙϯαʔͰ΋͏1ͭ
181. 💎 activerecord-ruby (unreleased) 🛤 ΞϓϦதͰߋ৽͞Εͳ͍͜ͱ͕લఏͷ͍ΘΏΔ
 ʮϚελʔσʔλʯΛΠϯϝϞϦʹల։ 🛤 ARͷΦϒδΣΫτͷ··Ωϟογϡ͢Δ 🛤 readonlyͳͷͰ҆৺ͯ͠࢖͍ճͤΔ
182. ૂ͍ 🛤 ΫΤϦͷແବଧͪΛ཈੍ 🛤 ARͷΦϒδΣΫτੜ੒ίετΛ࡟ݮ 🛤 GCෛՙΛܰݮ
183. ͜͜·ͰͳΒ୭΋͕ߟ͑ͨ͜ͱ͋Δͱࢥ͏ Μ͚ͩͲɺΠϯλʔϑΣΠεͱ࣮૷͕໰୊ 🛤 Model.fetch_from_cache ͱ͔ͦ͏͍͏ײ͡ͷ
 μα͍ίʔυ͸ઈରॻ͖ͨ͘ͳ͍ 🛤 ϓϩμΫγϣϯͷίʔυ͸;ͭ͏ͷARͷίʔυ͔Β Կ΋ม͑ͣʹɺͰ΋ͲͷϞσϧ͕ʮϚελʔςʔϒ ϧʯ͔͚ͩڭ͑ͯ΍ͬͨΒউखʹۭؾΛಡΜͰಈ࡞ ͢Δ͙Β͍͕͍͍
184. activerecord-ruby ͷAPI 🛤 ʮϚελʔʯͬΆ͍ϞσϧʹҎԼͷΑ͏ͳએݴΛ
 ೖΕΔ class Country < ActiveRecord::Base find_by_ruby! end
185. ͦΕ͚ͩ 🛤 ଞͷίʔυ͸Ұ੾͍͡Βͳͯ͘΋ɺҎԼͷΫΤϦͨ ͕ͪDBΛݺͼग़͢͜ͱͳ͘ద੾ͳ஋Λฦ͢ Model.find(id) Model.where(prefecture: 'Tokyo').order(:created_at)
186. joins͕ೖͬͯͨΓ͢ΔΑ͏ͳෳࡶͳΫΤϦ ͕౤͛ΒΕͨΒDBʹϑΥʔϧόοΫ͢Δ
187. ϝϞϦ͔Βऔ͖ͬͯͨ΋ͷͱDB͔Βऔ͖ͬͯͨ ΋ͷʹᴥᴪ͕ͳ͍͔Ͳ͏͔ൺֱ͢ΔϞʔυΛ౥ࡌ 🛤 ςετΛ͜ΕͰճ͓ͯ͘͠ͱ҆৺Ͱ͖Δ͸ͣ
188. ύϑΥʔϚϯεήΠϯ 🛤 ະ஌਺ 🛤 ਖ਼௚ͳͱ͜Ζɺ·ͱ΋ͳ࣮ΞϓϦͰͷޮՌ͸ݶఆత ͳ༧ײ͸͍ͯ͠Δ 🛤 DBͷ઀ଓ͕ύοπϯύοπϯΈ͍ͨͳ؀ڥͰ͸
 ޮ͔͘΋
189. ݟͲ͜Ζ 🛤 ARͷΠϯλʔϑΣΠεͱγʔϜϨεʹ࿈ܞ͢ΔͨΊ ͷςΫχοΫ
190. ࣮૷ৄࡉ 🛤 AR͕૊ΈཱͯͨASTΛSQLͰ͸ͳͯ͘Rubyͷ
 ίʔυʹม׵͢Δ ToRuby visitor ΛΰϦΰϦ࣮૷
191. gem͸·ͩͳ͍
192. Coming Soon...💎
193. ࠓ·Ͱʹແ͔ͬͨΞϓϩʔνͩ͠ɺίʔυ΋͔ ͳΓ͓΋͠Ζ͍ͷͰɺੈʹग़ͨΞΧπΩʹ͸ͥͻ ͍ͬͯ͡Έ͍ͯͩ͘͞
194. ઌߦݚڀ 🛤 arel_ruby
195. 💎 arel_ruby 🛤 https://github.com/amatsuda/arel_ruby 🛤 (2012೥)
196. ArelͷASTͷRuby visitor 🛤 ͭ·ΓɺࠓճͷϓϩμΫτͷΤϯδϯ෦෼ͦͷ΋ͷ
197. ͜Ε͸౰࣌ɺRDB͔Β੾Γ཭ͯ͠Rubyͷੈք͚ͩ ͰΞϓϦͷςετ͕࣮ߦͰ͖ͨΒ͓΋͠Ζ͍͔΋ɺ ͱࢥͬͯ΍ͬͯΈͨ΋ͷ 🛤 ͋·Γݱ࣮తͳϢʔεέʔεͰ͸ͳ͔ͬͨͷͰɺ
 ୯ʹ໘നͦ͏͔ͩΒ࡞ͬͯΈ͚ͨͩΈ͍ͨͳײ͡ʹ ͳͬͯ͠·ͬͨ 🛤 ͦͯͣͬ͠ͱ͓ଂೖΓ
198. ίʔυ͸ॻ͚ͯ΋Ϣʔεέʔε Λݟޡͬͨྫ
199. 8೥ܦͬͯɺ৽ͨͳϢʔεέʔεΛ ݟ͚ͭͯ෮׆
200. ͜Μͳ;͏ʹxx೥ܦ͔ͬͯΒੲॻ͍ͨ ίʔυͷժ͕ग़ͨΓ͢Δ͜ͱ΋͋Δ 🛤 ௕೥ίʔυΛॻ͖ଓ͚ͯΔͱΞυόϯςʔδ͕͋ͬ ͨΓ͢Δɺͱ͍͏ࣄྫ
201. ·ͱΊ
202. ΍ͬͺRails 🛤 RailsΛ͍ͬͺ͍ಡΜͩΓॻ͍ͨΓ͍ͯ͠ΔͱRails ʹৄ͘͠ͳΔ
203. ͍ͭͰ΋Ͳ͜Ͱ΋ૉૣ͘
 ύονΛॻ͜͏ 🛤 Railsʹৄ͘͠ͳΔͱɺRails͚ͩ͡Όͳ͍ͯ͘ΖΜ ͳ΋ͷʹύον͕ॻ͚ΔΑ͏ʹͳΔ 🛤 gem-srcΛrbenv΍bundlerͱ࿈ܞ͓͍ͤͯͯ͞ɺ ৗʹ࠷୹खॱͰύονΛ౤͚͛ͭΕΔ४උΛ੔͑ͯ ͓͜͏
204. ͱʹ͔ͨ͘͘͞Μ
 ύονΛॻ͜͏ 🛤 ύονΛͨ͘͞Μॻ͔ͳ͍ͱɺύον͕ॻ͚Δ
 Α͏ʹ͸ͳΒͳ͍ 🛤 ྔ͕࣭ʹస͡Δ͜ͱ΋͋Δ
205. gem࡞Ո΁ͷಓ 🛤 ͍ΖΜͳ΋ͷʹύονΛॻ͍ͯΔͱɺଞਓʹॻ͔ͤ ΔΑΓࣗ෼Ͱॻ͍ͨ΄͏͕ྑ͍΋ͷ͕Ͱ͖Δ͜ͱ͕ Θ͔Δ 🛤 ͖͔͚ͬ΍ϢʔεέʔεΛ͔ͭ·͑ͯɺϓϩμΫτ ʹ͍ͯ͜͠͏
206. ͦΜͳΜ୭Ͱ΋ࢥ͍ͭ͘Ͱ͠ΐɺΈ͍ͨ ͳgemͰ΋ͱʹ͔͘΍ͬͯΈΔͱྑ͍ 🛤 ҙ֎ͱ୭΋΍Ζ͏ͱͯ͠ͳ͔ͬͨΓɺࣗ෼͕ੈքͰ Ұ൪͏·͘΍ΕͨΓ͢Δ
207. ໊લॏཁ 🛤 ໊લ͚ͭΔͷΉ͍ͣ 🛤 ໊લ͕͚ͭΕͳͯ͘ࠓ೔ͷൃදʹؒʹ߹Θͳ͔ͬͨ ΋ͷ͕͍͔ͭ͋͘ΔͷͰɺ୭͔Ұॹʹ໊લΛߟ͑ͯ ΄͍͠……
208. gemͷख़੒ 🛤 ࡞ͬͨgem͸͙͢ʹժ͕ग़ͳͯ͘΋ɺޙ͔ΒϢʔε έʔε͕͍͖ͭͯͯɺԿ೥΋ܦ͔ͬͯΒ໾ʹཱͬͨ Γ͢Δ 🛤 ͷͰɺ΍ͬͺΓΞΠσΞΛ͖ͪΜͱίʔυʹམͱ͠ ͓ͯ͘͜ͱ͕େࣄ
209. ϝϯς 🛤 gemΛ͍ͬͺ͍࡞ͬͨΓͯ͠Δͱɺϝϯςର৅͕
 ૿͑͗ͯ͢ख͕ճΒͳ͘ͳΔ 🛤 ͦ΋ͦ΋๞͖ͬΆ͍ਖ਼֬ͳͷͰϝϯςͱ͔ۤख…… 🛤 ͳͷͰɺ୭͔ϝϯςख఻ͬͯ͘ΕΔͱͱͯ΋خ͠ ͍……
210. Future Works 🛤 ࠓޙͱ΋ɺԿ͔ϓϩμΫτͷΞΠσΞ͕͖߱ͬͯͨ Βɺ਺ϲ݄ʹ1ճ͙Β͍ͷϖʔεͰgemΛ࡞Γଓ͚ ͍ͨ 🛤 @amatsuda ͷ࣍ճ࡞ʹ͝ظ଴͍ͩ͘͞ʂ
211. Coming Soon! 💎
212. ·ͱΊ 🛤 গ͠Ͱ΋օ͞Μͷ͜Ε͔ΒͷOSS׆ಈͷώϯτʹ ͳ͍ͬͯΕ͹޾͍Ͱ͢
213. end 🛤 name: Akira Matsuda 🛤 GitHub: @amatsuda 🛤 Twitter: @a_matsuda