銀座Rails版「Rubyプログラミング問題にチャレンジ！」公開コードレビュー / ginzarails code review

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ۜ࠲Rails#41 2022-1-25 ۜ࠲Rails൛ ʮRubyϓϩάϥϛϯά໰୊ʹ νϟϨϯδʂʯެ։ίʔυϨϏϡʔ ҏ౻ ३Ұ / @jnchito

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͜ͷൃද͸ԿͰ͔͢ʁ • Έͳ͞Μ͕ॻ͍ͯ͘ΕͨϓϩάϥϜΛίʔυϨϏϡʔ͠·͢ • ϓϩάϥϜͷ͓୊͸ʮ఺ࣈϝʔΧʔϓϩάϥϜʯͰ͢ • QiitaΠϕϯτͷ࠷༏ल࡞඼΍๻ͷ໛ൣղ౴΋͓ݟͤ͠·͢

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఺ࣈϝʔΧʔϓϩάϥϜʁ

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఺ࣈϝʔΧʔϓϩάϥϜͱ͸ • ೖྗʹϩʔϚࣈɺग़ྗʹ఺ࣈʢͷจࣈྻʣͱͳΔRubyϓϩάϥϜͰ͢ tenji_maker = TenjiMaker.new puts tenji_maker.to_tenji('A HI RU') ↑ɹ↑ɹ↑ ͋ ͻ Δ #=> o- o- oo # -- o- -o # -- oo --

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͸͍ɺઌੜʂ ఺ࣈͷ͘͠Έ͕Θ͔Γ·ͤΜʂ

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ఺ࣈʹ͸6ͭͷ఺͕͋ΓɺͦΕͧΕ1ʙ6ͷ൪߸͕ৼΒΕ͍ͯ·͢ ᶃ ᶆ ᶄ ᶇ ᶅ ᶈ

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ʮ͍͋͏͓͑ʯ͸͜͏Ͱ͢ʢ͜Ε͸֮͑Δ͚ͩʣ ᶃ ʔ ʔ ʔ ʔ ʔ ᶃ ʔ ᶄ ʔ ʔ ʔ ᶃ ᶆ ʔ ʔ ʔ ʔ ᶃ ᶆ ᶄ ʔ ʔ ʔ ʔ ᶆ ᶄ ʔ ʔ ʔ ͋ɹɹ͍ɹɹ͏ɹɹ͑ɹɹ͓

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ʮ͔͖͚͘͜ʯ͸ʮ͍͋͑͏͓ʯʹᶈͷ఺ΛՃ͑·͢ ᶃ ʔ ʔ ʔ ʔ ᶈ ᶃ ʔ ᶄ ʔ ʔ ᶈ ᶃ ᶆ ʔ ʔ ʔ ᶈ ᶃ ᶆ ᶄ ʔ ʔ ᶈ ʔ ᶆ ᶄ ʔ ʔ ᶈ ͔ɹɹ͖ɹɹ͘ɹɹ͚ɹɹ͜

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ʮͤͦ͢͞͠ʯ͸ʮ͍͋͑͏͓ʯʹᶇͱᶈͷ఺ΛՃ͑·͢ ᶃ ʔ ʔ ᶇ ʔ ᶈ ᶃ ʔ ᶄ ᶇ ʔ ᶈ ᶃ ᶆ ʔ ᶇ ʔ ᶈ ᶃ ᶆ ᶄ ᶇ ʔ ᶈ ʔ ᶆ ᶄ ᶇ ʔ ᶈ ͞ɹɹ͠ɹɹ͢ɹɹͤɹɹͦ

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ͳΜͱͳ͘Θ͔͖ͬͯͨʁ

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ͨߦɺͳߦɺ͸ߦɺ·ߦɺΒߦ͸ʮ͍͋͏͓͑ʯʹ྘ͷ఺ΛՃ͑Ε͹OK

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ʮ΍ΏΑʯ͸฼ԻΛҰ൪ԼʹԼΖͯ͠ɺᶆͷ఺ΛՃ͑·͢ ᶃ ʔ ʔ ʔ ʔ ʔ ᶃ ᶆ ʔ ʔ ʔ ʔ ʔ ᶆ ᶄ ʔ ʔ ʔ ͋ɹɹɹɹɹ͏ɹɹɹɹɹ͓

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ʮ΍ΏΑʯ͸฼ԻΛҰ൪ԼʹԼΖͯ͠ɺᶆͷ఺ΛՃ͑·͢ ʔ ʔ ʔ ʔ ᶅ ʔ ʔ ʔ ʔ ʔ ᶅ ᶈ ʔ ʔ ʔ ᶇ ᶅ ʔ

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ʮ΍ΏΑʯ͸฼ԻΛҰ൪ԼʹԼΖͯ͠ɺᶆͷ఺ΛՃ͑·͢ ʔ ᶆ ʔ ʔ ᶅ ʔ ʔ ᶆ ʔ ʔ ᶅ ᶈ ʔ ᶆ ʔ ᶇ ᶅ ʔ ΍ɹɹɹɹɹΏɹɹɹɹɹΑ

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ʮΘʯ͸ʮ͋ʯΛҰ൪ԼʹԼΖ͚ͩ͢ɻʮΜʯ͸ᶅᶇᶈͰද͠·͢ ᶃ ʔ ʔ ʔ ʔ ʔ ʔ ʔ ʔ ᶇ ᶅ ᶈ ͋ɹɹɹɹɹΜɹɹɹɹɹΑ

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2෼ͰΘ͔Δ఺ࣈͷ࢓૊Έ • ʮΘʯ͸ʮ͋ʯΛҰ൪ԼʹԼΖ͚ͩ͢ɻʮΜʯ͸ᶅᶇᶈͰද͠·͢ɻ ʔ ʔ ʔ ʔ ᶅ ʔ ʔ ʔ ʔ ᶇ ᶅ ᶈ ΘɹɹɹɹɹΜɹɹɹɹɹΑ

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ҎԼͷ఺ࣈ͸ࠓճ ม׵ର৅֎ • ʮΛʯ • ௕Իʢ৳͹͢ԻɻʮͪʔͨʔʯͳͲʣ • ଅԻʢ͍ͪ͞ͳʮͭʯɻʮ͔ͬͺʯͳͲʣ • ୙Իʢʮ͕͙͗͛͝ʯͳͲʣɺ൒୙Իʢʮͺͽ΀΃Άʯʣ • ፠Իʢʮ͖Ό͖Ύ͖ΐʯͳͲʣ • ͳͲͳͲ

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ࢀߟจݙ͓Αͼը૾ͷҾ༻ݩ • શࢹ৘ڠ:఺ࣈͱ͸ - ఺ࣈͷ͘͠Έ  http://www.naiiv.net/braille/?tenji-sikumi • ఺ࣈ - Wikipedia  https://ja.wikipedia.org/wiki/఺ࣈ

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͸͍ɺ΋͏఺ࣈΛϚελʔ ͠·ͨ͠Ͷʁʢॴཁ࣌ؒ2෼ʣ

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ೖྗ͢ΔϩʔϚࣈͷϧʔϧ • ͢΂ͯΞϧϑΝϕοτͷେจࣈͰॻ͘ • ͔ͳͷؒ͸൒֯εϖʔεͰ۠੾Δ A HI RU [ [

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ೖྗ͢ΔϩʔϚࣈͷϧʔϧ • ܇ྩࣜͰೖྗ͢ΔʢϔϘϯࣜ͸ߟྀෆཁʣ ܇ྩࣜ ϔϘϯࣜ ͠ SI SHI ͪ TI CHI ͭ TU TSU ; HU FU Μ N N/M

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ೖྗςΩετͷྫ • ͋ͻΔ = A HI RU • ͖ΓΜ = KI RI N • ͠·͏· = SI MA U MA • ʹΘͱΓ = NI WA TO RI • ͻΑ͜ = HI YO KO • ͖ͭͶ = KI TU NE • ҟৗͳೖྗ஋Λߟྀ͢Δඞཁ͸͋Γ·ͤΜ

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࡞੒ͨ͠ϓϩάϥϜͷఏग़ํ๏ • GitHubͷ਽ܗϦϙδτϦΛϑΥʔΫ͠ɺίʔυΛॻ͘ • ϓϧϦΫΤετΛ࡞੒͠ɺCIͷςετ͕શ෦ύεͨ͠ΒOK class TenjiMakerTest < Minitest::Test def setup @tenji_maker = TenjiMaker.new end def test_a_hi_ru tenji = @tenji_maker.to_tenji('A HI RU') assert_equal <<~TENJI.chomp, tenji o- o- oo -- o- -o -- oo -- TENJI end # ҎԼɺςετ͕ଓ͘

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͜ͷߨԋͰֶΜͰ΄͍͜͠ͱ • ࣗ෼͕ॻ͍ͨίʔυͱଞͷਓ͕ॻ͍ͨίʔυΛݟൺ΂ͯΈΑ͏ • ͍ΖΜͳϩδοΫͷߟ͑ํΛֶ΅͏ • Rubyͷݴޠػೳ΍ศརͳϝιουʹֶ͍ͭͯ΅͏ • ͜͜ͰֶΜͩ಺༰Λ໌೔͔Βॻࣗ͘෼ͷίʔυʹ׆͔ͯ͠ΈΑ͏

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ຊ೔ͷ͓͠ͳ͕͖ • ࢀՃऀͷԠื࡞඼Λެ։ίʔυϨϏϡʔ ʢ1ຊʣ • QiitaΞυϕϯτΧϨϯμʔͰͷ࠷༏ल࡞඼Λ঺հ • ग़୊ऀʢ@jnchitoʣͷ໛ൣղ౴Λ঺հ

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؍ઓπΠʔτ΋͓଴͍ͪͯ͠·͢ʂ • ʮ͜ͷίʔυɺ޷͖ʂʯͱ͔ʮ๻ͩͬͨΒ͜͏ॻ͘ͳ͋ʯͳͲͳͲ • Έͳ͞ΜͷπΠʔτ΋͜ͷൃදͷҰ෦Ͱ͢ • ΈΜͳͰΘ͍Θ͍ίʔυϨϏϡʔ͠·͠ΐ͏😄 • ͜ͷ͋ͱͷ࠙਌ձͰʮྑ͍ίʔυʯʹ͍ͭͯٞ࿦ͯ͠ΈΔͷ΋͍͍͔΋

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Ԡื࡞඼ͷެ։ίʔυϨϏϡʔ

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Ԡื࡞඼ͷެ։ίʔυϨϏϡʔ • ࠓ͔ΒϨϏϡʔର৅ͷϓϧϦΫΤετΛ1ຊબͼ·͢ • બఆج४͸όΠτ਺ͷ߹ܭ͕࠷΋খ͍͞ϓϩάϥϜͰ͢ʂʢςετίʔυΛআ͘ʣ

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ͱ͍͏Θ͚Ͱɺຊ೔ͷର৅࡞඼͸ͪ͜Βʂ • https://github.com/JunichiIto/tenji-maker-challenge-for-ginza-rails/pull/5

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ϨϏϡʔ͓ΘΓ pofkuma͞ΜɺͲ͏΋͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ

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QiitaΞυϕϯτΧϨϯμʔͷ ࠷༏ल࡞඼ͷ঺հ

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QiitaΞυϕϯτΧϨϯμʔͷ࠷༏ल࡞඼ • QiitaͷاըͰ΋ಉ͓͡୊ͰɺίʔυͱղઆهࣄΛॻ͍ͯ΋Β͍·ͨ͠  https://qiita.com/advent-calendar/2021/ruby-challenge

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QiitaΞυϕϯτΧϨϯμʔͷ࠷༏ल࡞඼ • Qiitaͷ࠷༏ल࡞඼͸ @haruguchiyuma ͞ΜͷίʔυͰ͢ʂ  https://qiita.com/haruguchiyuma/items/7d93a8feca11a325bee9

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๻ͷධՁϙΠϯτʢදজཧ༝ʣ • ίʔυ͕γϯϓϧͰ୹͘·ͱ·͍ͬͯΔ • ίʔυͷॻ͖ํʹΫη͕ͳ͘ಡΈ΍͍͢ • ม׵ϩδοΫ͸গ͠ಠಛ͕ͩɺهࣄ಺Ͱߟ͑ํ͕ஸೡʹઆ໌͞Ε͓ͯΓɺ  ͳ͓͔ͭʮࠓճͷ࢓༷ͷΈ࢖͑Δํ๏ͩͱׂΓ੾ͬͯߟ͑Δʯͱ  τϨʔυΦϑ͕͋Δ͜ͱ΋ͪΌΜͱ֮ࣗͰ͖͍ͯΔ • ͸Δ͙ͪ͞Μɺ͓ΊͰͱ͏͍͟͝·͢ʂ🎉

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ग़୊ऀʢ@jnchitoʣͷ໛ൣղ౴

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๻͕ॻ͍ͨίʔυ͸͜Μͳײ͡ (1/3) class TenjiMaker def to_tenji(text) tenji_list = text.split(' ').map { |romaji| Tenji.new(romaji) } join(tenji_list) end private def join(tenji_list) tenji_list .map { |tenji| tenji.to_s.split("\n") } .transpose .map { |row| row.join(' ') } .join("\n") end end

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๻͕ॻ͍ͨίʔυ͸͜Μͳײ͡ (2/3) class Tenji DAN = { 'A' => 0b100000, 'I' => 0b101000, 'U' => 0b110000, 'E' => 0b111000, 'O' => 0b011000, } GYO = { 'K' => 0b000001, 'S' => 0b000101, 'T' => 0b000110, 'N' => 0b000010, 'H' => 0b000011, 'M' => 0b000111, 'Y' => 0b010000, 'R' => 0b000100, } def initialize(romaji) @romaji = romaji end # ͭͮ͘

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๻͕ॻ͍ͨίʔυ͸͜Μͳײ͡ (3/3) # ͖ͭͮ def to_i case @romaji.chars in ['Y' => gyo, 'A' | 'U' => dan] then GYO[gyo] | (DAN[dan] >> 4) in ['Y' => gyo, 'O' => dan] then GYO[gyo] | (DAN[dan] >> 2) in ['W', 'A' => dan] then DAN[dan] >> 4 in [gyo, dan] then GYO[gyo] | DAN[dan] in ['N'] then 0b000111 in [dan] then DAN[dan] end end def to_s sprintf('%06b', to_i).tr('01', '-o').scan(/../).join("\n") end end

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ίʔυ͸ͪ͜Βʹஔ͍ͯ͋Γ·͢ • https://github.com/JunichiIto/tenji-maker-challenge-for-ginza-rails/tree/answer

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ϩδοΫͷղઆ

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جຊతͳߟ͑ํ • TenjiMakerΫϥεͱ͸ผʹTenjiΫϥεΛ࡞Δ • TenjiΫϥε͸ɺ͔ͳ1จࣈʹରԠ͢Δ఺ࣈʢͷจࣈྻʣΛੜ੒Ͱ͖Δ • ʮ͔ͳ1จࣈˠ఺ࣈʯͷ͘͠Έ͑͞Ͱ͖Ε͹ɺ͋ͱ͸ͦΕΛ࿈݁͢Δ͚ͩ Tenji.new('A').to_s #=> o- # -- # -- Tenji.new('HI').to_s #=> o- # o- # oo

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఺ࣈΛͲͷΑ͏ʹߏங͢Δ͔ʁ • ఺ࣈʹ͸6ͭͷυοτʢ఺ʣ͕͋Δ • ֤υοτ͸"o"ͱ"-"ͷ2ͭͷঢ়ଶΛ࣋ͭ • "o"ͱ"-"͸ONͱOFFͰ͋Γɺ1ͱ0Ͱදͤ͹ɺ6Ϗοτͷ2ਐ਺ͰදݱͰ͖Δ ᶃ ʔ ʔ ᶇ ʔ ᶈ 0b100011 ᶃʔʔʔᶇᶈ → → 1 2 3 4 5 6

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఺ࣈΛͲͷΑ͏ʹߏங͢Δ͔ʁ • ͨͩ͠ɺϓϩάϥϜͰॲཧ͢Δ৔߹͸ԣॻ͖ͷํ͕Կ͔ͱ౎߹͕ྑ͍ • ͦ͜Ͱࠓճ͸͋͑ͯυοτͷ൪߸Λԣॻ͖ͰׂΓৼΔ͜ͱʹ͢Δ ᶃ ᶆ ᶄ ᶇ ᶅ ᶈ → ᶃ ᶄ ᶅ ᶆ ᶇ ᶈ λ ς Ϥί 0b110011 0b101101 1 2 3 4 5 6 1 2 3 4 5 6 λς Ϥί ↓

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఺ࣈΛͲͷΑ͏ʹߏங͢Δ͔ʁ • 2ਐ਺ͷ੔਺஋͸࿦ཧ࿨ (OR) Λ࢖ͬͯɺ2ͭͷ஋Λ߹੒Ͱ͖Δ • ʮ͖ʯΛ࡞Δ৔߹ ᶃ ʔ ᶅ ʔ ʔ ᶈ ͖ ͍ஈ 0b101000 ͔ߦ 0b000001 ͖ɹ 0b101001 0b101000 | 0b000001 #=> 0b101001 1 2 3 4 5 6

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ฼ԻΛҰ൪Լ·ͰԼΖ͢ඞཁ͕͋ΔɻͲ͏͢Ε͹͍͍͔ʁ ʔ ᶄ ʔ ʔ ᶇ ʔ ʔ ᶄ ʔ ʔ ᶇ ᶈ ʔ ᶄ ʔ ᶆ ᶇ ʔ ΍ɹɹɹɹɹΏɹɹɹɹɹΑ

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ӈϏοτγϑτ͕࢖͑ͦ͏ ᶃ ᶄ ʔ ʔ ʔ ʔ 0b110000

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ӈϏοτγϑτ͕࢖͑ͦ͏ ʔ ᶄ ᶅ ʔ ʔ ʔ 0b110000 >> 1 ↓ 0b011000

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ӈϏοτγϑτ͕࢖͑ͦ͏ ʔ ʔ ᶅ ᶆ ʔ ʔ 0b110000 >> 2 ↓ 0b001100 2ͭӈʹϏοτγϑτ ͢Ε͹1ஈԼ͕Δ

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ӈϏοτγϑτ͕࢖͑ͦ͏ ʔ ʔ ʔ ᶆ ᶇ ʔ 0b110000 >> 3 ↓ 0b000110

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ӈϏοτγϑτ͕࢖͑ͦ͏ ʔ ʔ ʔ ʔ ᶇ ᶈ 0b110000 >> 4 ↓ 0b000011 4ͭӈʹϏοτγϑτ ͢Ε͹2ஈԼ͕Δ

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ӈϏοτγϑτͨ͠஋ʹ࿦ཧ࿨Ͱʮ΍ߦʯΛද͢ᶄͷυοτΛ߹੒͢Ε͹OK (0b011000 >> 2) | 0b010000 #=> 0b010110 ʔ ᶄ ᶅ ʔ ʔ ʔ ʔ ʔ ʔ ᶆ ᶇ ʔ → ͓ (0b110000 >> 4) | 0b010000 #=> 0b010011 ᶃ ᶄ ʔ ʔ ʔ ʔ ʔ ʔ ʔ ʔ ᶇ ᶈ → ͏

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ӈϏοτγϑτͨ͠஋ʹ࿦ཧ࿨Ͱʮ΍ߦʯΛද͢ᶄͷυοτΛ߹੒͢Ε͹OK (0b011000 >> 2) | 0b010000 #=> 0b010110 ʔ ᶄ ᶅ ʔ ʔ ʔ ʔ ᶄ ʔ ᶆ ᶇ ʔ → ͓ Α (0b110000 >> 4) | 0b010000 #=> 0b010011 ᶃ ᶄ ʔ ʔ ʔ ʔ ʔ ᶄ ʔ ʔ ᶇ ᶈ → ͏ Ώ

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ʮΘʯ͸Ͳ͏͢Δʁ • ʮ͋ʯΛҰ൪Լ·ͰԼΖ͢ ʹ 4ͭӈʹϏοτγϑτ͢Δ ᶃ ʔ ʔ ʔ ʔ ʔ ʔ ʔ ʔ ʔ ᶇ ʔ → 0b100000 >> 4 #=> 0b000010 ͋ Θ

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ʮΜʯ͸Ͳ͏͢Δʁ • Ͳͷϧʔϧʹ΋౰ͯ͸·Βͳ͍ͷͰɺͨͩͷݻఆ஋ͱݟͳ͢ ʔ ʔ ʔ ᶆ ᶇ ᶈ 0b000111 ʔʔʔᶆᶇᶈ → → Μ

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ஈͱߦͷϚοϐϯάදʢϋογϡʣΛ࡞Δ • ฼ԻʢஈʣͱࢠԻʢߦʣͷରԠؔ܎ΛϋογϡͰ·ͱΊΔ • ʮΜʯ͸ͨͩͷݻఆ஋ͳͷͰɺ͜ͷϋογϡʹ͸ؚΊͳ͍ class Tenji DAN = { 'A' => 0b100000, 'I' => 0b101000, 'U' => 0b110000, 'E' => 0b111000, 'O' => 0b011000, } GYO = { 'K' => 0b000001, 'S' => 0b000101, 'T' => 0b000110, 'N' => 0b000010, 'H' => 0b000011, 'M' => 0b000111, 'Y' => 0b010000, 'R' => 0b000100, }

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ϩʔϚࣈΛͲ͏΍ͬͯߦͱஈʹ෼͚Δ͔ʁ • charsϝιουͰϩʔϚࣈ͸ஈͱߦʹ෼ղ͢Δ • Ϛοϐϯάද͔Β਺஋Λऔಘ͠࿦ཧ࿨Λฦ͢ / ʮ͍͋͏͓͑ʯ͸ஈ͚ͩฦ͢ # gyo="K", dan="I" ͕୅ೖ͞ΕΔ gyo, dan = "KI".chars # GYO["K"]=0b000001, DAN["I"]=0b101000 Ͱ࿦ཧ࿨͸ 0b101001 GYO[gyo] | DAN[dan] # dan="A" ͕୅ೖ͞ΕΔ dan, = "A".chars # DAN["A"]=0b100000 DAN[dan]

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2จࣈͱ1จࣈͷͱ͖ͰͲ͏৚݅෼ذ͢Δʁ • ύλʔϯϚονʢcase/inࣜʣΛ࢖ͬͯ഑ྻͷߏ଄ʹண໨͢Δͱศརͦ͏ def to_i case @romaji.chars in [gyo, dan] GYO[gyo] | DAN[dan] in [dan] DAN[dan] end end charsͷ໭Γ஋͕["K", "I"]ͳΒ͜͜ʹϚον ͞Βʹɺม਺gyoʹ"K"͕ɺม਺danʹ"I"͕ ͦΕͧΕ୅ೖ͞ΕΔ

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2จࣈͱ1จࣈͷͱ͖ͰͲ͏৚݅෼ذ͢Δʁ • ύλʔϯϚονʢcase/inࣜʣΛ࢖ͬͯ഑ྻͷߏ଄ʹண໨͢Δͱศརͦ͏ def to_i case @romaji.chars in [gyo, dan] GYO[gyo] | DAN[dan] in [dan] DAN[dan] end end charsͷ໭Γ஋͕["A"]ͳΒ͜͜ʹϚον ͞Βʹɺม਺danʹ"A"͕୅ೖ͞ΕΔ

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ͜Ε΋ύλʔϯϚονͰରԠՄೳ def to_i case @romaji.chars in ['Y' => gyo, 'A' | 'U' => dan] GYO[gyo] | (DAN[dan] >> 4) in ['Y' => gyo, 'O' => dan] GYO[gyo] | (DAN[dan] >> 2) in [gyo, dan] # ҎԼུ ["Y", "A"] ͔ ["Y", "U"] ͳΒϚον gyo ʹ͸ "Y" ͕ dan ʹ͸ "A" ͔ "U" ͕ ͦΕͧΕ୅ೖ͞ΕΔ

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ʮ΍ΏΑʯ͸Ͳ͏͢Δʁ • ͜Ε΋ύλʔϯϚονͰରԠՄೳ def to_i case @romaji.chars in ['Y' => gyo, 'A' | 'U' => dan] GYO[gyo] | (DAN[dan] >> 4) in ['Y' => gyo, 'O' => dan] GYO[gyo] | (DAN[dan] >> 2) in [gyo, dan] # ҎԼུ ["Y","O"] ͳΒϚον gyo ʹ͸ "Y" ͕ dan ʹ͸ "O" ͕ ͦΕͧΕ୅ೖ͞ΕΔ

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ʮΘʯ͸Ͳ͏͢Δʁ • ͜Ε΋ύλʔϯϚονͰରԠՄೳ def to_i case @romaji.chars # লུ in ['W', 'A' => dan] DAN[dan] >> 4 in [gyo, dan] # ҎԼུ ["W","A"] ͳΒϚον dan ʹ͸ "A" ͕୅ೖ͞ΕΔ

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ʮΜʯ͸Ͳ͏͢Δʁ • ͜Ε΋ύλʔϯϚονͰରԠՄೳ def to_i case @romaji.chars # লུ in ['N'] 0b000111 in [dan] DAN[dan] end end ["N"] ͳΒϚον ม਺͸࢖Θͣݻఆ஋Λฦ͢

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શ෦·ͱΊΔͱɺ͜͏ • εϖʔεͷ౎߹্ɺthenͰߦ਺Λઅ໿͠·ͨ͠ def to_i case @romaji.chars in ['Y' => gyo, 'A' | 'U' => dan] then GYO[gyo] | (DAN[dan] >> 4) in ['Y' => gyo, 'O' => dan] then GYO[gyo] | (DAN[dan] >> 2) in ['W', 'A' => dan] then DAN[dan] >> 4 in [gyo, dan] then GYO[gyo] | DAN[dan] in ['N'] then 0b000111 in [dan] then DAN[dan] end end

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͜ΕͰϩʔϚࣈΛ2ਐ਺ʹม׵Ͱ͖Δʂ • to_i ϝιουͷڍಈ͸͜Μͳײ͡ Tenji.new('KI').to_i #=> 0b101001 Tenji.new('A').to_i #=> 0b100000 Tenji.new('YU').to_i #=> 0b010011 Tenji.new('WA').to_i #=> 0b000010 Tenji.new('N').to_i #=> 0b000111

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2ਐ਺Λ఺ࣈͷจࣈྻʹม׵͢Δ • ͋ͱ͸ػցతʹม׵͢Δ͚ͩ # to_i ͕ 0b101001 Λฦ͢৔߹ def to_s sprintf('%06b', to_i) .tr('01', '-o') .scan(/../) .join("\n") end

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2ਐ਺Λ఺ࣈͷจࣈྻʹม׵͢Δ • ͋ͱ͸ػցతʹม׵͢Δ͚ͩ # to_i ͕ 0b101001 Λฦ͢৔߹ def to_s sprintf('%06b', to_i) .tr('01', '-o') .scan(/../) .join("\n") end จࣈྻ "101001" ʹม׵

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2ਐ਺Λ఺ࣈͷจࣈྻʹม׵͢Δ • ͋ͱ͸ػցతʹม׵͢Δ͚ͩ # to_i ͕ 0b101001 Λฦ͢৔߹ def to_s sprintf('%06b', to_i) .tr('01', '-o') .scan(/../) .join("\n") end "0"Λ"-"ʹɺ"1"Λ"o"ʹม׵ ͭ·Γɺ "o-o--o" ͕Ͱ͖͕͋Δ

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2ਐ਺Λ఺ࣈͷจࣈྻʹม׵͢Δ • ͋ͱ͸ػցతʹม׵͢Δ͚ͩ # to_i ͕ 0b101001 Λฦ͢৔߹ def to_s sprintf('%06b', to_i) .tr('01', '-o') .scan(/../) .join("\n") end 2จࣈͣͭ഑ྻʹ෼ׂ͢Δ ͭ·Γɺ ["o-", "o-", "-o"] ͕Ͱ͖͕͋Δ

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2ਐ਺Λ఺ࣈͷจࣈྻʹม׵͢Δ • ͋ͱ͸ػցతʹม׵͢Δ͚ͩ # to_i ͕ 0b101001 Λฦ͢৔߹ def to_s sprintf('%06b', to_i) .tr('01', '-o') .scan(/../) .join("\n") end ֤ཁૉΛվߦจࣈͰ࿈݁ → ʢ׬੒ʂʣ o- o- -o

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TenjiΫϥεͷશମ૾ (1/2) class Tenji DAN = { 'A' => 0b100000, 'I' => 0b101000, 'U' => 0b110000, 'E' => 0b111000, 'O' => 0b011000, } GYO = { 'K' => 0b000001, 'S' => 0b000101, 'T' => 0b000110, 'N' => 0b000010, 'H' => 0b000011, 'M' => 0b000111, 'Y' => 0b010000, 'R' => 0b000100, } def initialize(romaji) @romaji = romaji end # ͭͮ͘

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TenjiΫϥεͷશମ૾ (2/2) # ͖ͭͮ def to_i case @romaji.chars in ['Y' => gyo, 'A' | 'U' => dan] then GYO[gyo] | (DAN[dan] >> 4) in ['Y' => gyo, 'O' => dan] then GYO[gyo] | (DAN[dan] >> 2) in ['W', 'A' => dan] then DAN[dan] >> 4 in [gyo, dan] then GYO[gyo] | DAN[dan] in ['N'] then 0b000111 in [dan] then DAN[dan] end end def to_s sprintf('%06b', to_i).tr('01', '-o').scan(/../).join("\n") end end

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TenjiMakerΫϥεͷॲཧ΋ඇৗʹػցత class TenjiMaker def to_tenji(text) tenji_list = text.split(' ').map { |romaji| Tenji.new(romaji) } join(tenji_list) end private def join(tenji_list) tenji_list .map { |tenji| tenji.to_s.split("\n") } .transpose .map { |row| row.join(' ') } .join("\n") end end ೖྗ஋ΛεϖʔεͰ෼ׂͯ͠ TenjiΫϥεͷ഑ྻΛ࡞Δ

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TenjiMakerΫϥεͷॲཧ΋ඇৗʹػցత class TenjiMaker def to_tenji(text) tenji_list = text.split(' ').map { |romaji| Tenji.new(romaji) } join(tenji_list) end private def join(tenji_list) tenji_list .map { |tenji| tenji.to_s.split("\n") } .transpose .map { |row| row.join(' ') } .join("\n") end end ֤఺ࣈΛߦ͝ͱʹ෼ׂͯ͠ ഑ྻͷঢ়ଶʹ໭͢ [ ["o-", "o-", "--"], ͍ ["oo", "--", "o-"] ͵ ] o- oo o- -- -- o- ͍ɹ͵ →

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TenjiMakerΫϥεͷॲཧ΋ඇৗʹػցత class TenjiMaker def to_tenji(text) tenji_list = text.split(' ').map { |romaji| Tenji.new(romaji) } join(tenji_list) end private def join(tenji_list) tenji_list .map { |tenji| tenji.to_s.split("\n") } .transpose .map { |row| row.join(' ') } .join("\n") end end ߦྻΛ൓సͤ͞Δ [ ["o-", "oo"], ["o-", "--"], ["--", "o-"] ] [ ["o-", "o-", "--"], ͍ ["oo", "--", "o-"] ͵ ] ͍ɹɹɹ͵ ↓

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TenjiMakerΫϥεͷॲཧ΋ඇৗʹػցత class TenjiMaker def to_tenji(text) tenji_list = text.split(' ').map { |romaji| Tenji.new(romaji) } join(tenji_list) end private def join(tenji_list) tenji_list .map { |tenji| tenji.to_s.split("\n") } .transpose .map { |row| row.join(' ') } .join("\n") end end ߦ಺ͷ֤ཁૉΛεϖʔεͰ࿈݁͢Δ [ ["o-", "oo"], ["o-", "--"], ["--", "o-"] ] ͍ɹɹɹ͵ [ "o- oo", "o- --", "-- o-" ] ͍ɹ͵ ↓

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TenjiMakerΫϥεͷॲཧ΋ඇৗʹػցత class TenjiMaker def to_tenji(text) tenji_list = text.split(' ').map { |romaji| Tenji.new(romaji) } join(tenji_list) end private def join(tenji_list) tenji_list .map { |tenji| tenji.to_s.split("\n") } .transpose .map { |row| row.join(' ') } .join("\n") end end ֤ߦΛվߦจࣈͰ࿈݁͢Δʢ׬੒ʂʣ [ "o- oo", "o- --", "-- o-" ] ͍ɹ͵ o- oo o- -- -- o- ͍ɹ͵ ↓

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ϩδοΫͷ͓͞Β͍

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ϩδοΫͷ͓͞Β͍ • ϩʔϚࣈˠ఺ࣈͷม׵ϧʔϧ͸TenjiΫϥεʹΧϓηϧԽͨ͠ • ఺ࣈ͸6Ϗοτͷ2ਐ਺ͱͯ͠ѻͬͨʢυοτͷ൪߸͸ԣಡΈʹஔ͖׵͑ͨʣ • ฼ԻʢஈʣͱࢠԻʢߦʣͷ֤਺஋ΛϏοτԋࢉͷ࿦ཧ࿨Ͱ߹੒ͨ͠ • ϩʔϚࣈΛ฼ԻͱࢠԻʹ෼ղ͢Δࡍͷ৚݅෼ذΛύλʔϯϚονͰ࣮૷ͨ͠ • ఺ࣈΛ2ਐ਺ͰදݱͰ͖Ε͹ɺ͋ͱ͸ػցతʹจࣈྻԽ͢Δ͚ͩ • RailsͰݴ͑͹2ਐ਺͕Ϟσϧɺ"-o"Ͱදͨ͠จࣈྻ͕viewͷΠϝʔδ o- o- -o 0b101001

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໛ൣղ౴ͷ΢ΠʔΫϙΠϯτʁ🤔 • ॲཧޮ཰ͷ؍఺Ͱ͍͏ͱϕετͳ࣮૷Ͱ͸ͳ͍ ‣ TenjiΫϥεͰ࡞ͬͨจࣈྻΛTenjiMakerΫϥε͕࠶෼ղ͍ͯ͠Δ ‣ ͕ɺʮૣ͗͢Δ࠷దԽ͸ॾѱͷࠜݯʯͱ͍͏֨ݴ΋͋Δ ‣ ࠷దԽ͸࣮ߦ଎౓͕໰୊ʹͳͬͨͱ͖ʹߟ͑Ε͹ྑ͍ • TenjiΫϥεͷto_i΍to_s͍ͬͯ͏ϝιου໊͸͜ΕͰ͍͍ͷ͔ͳ͋ʁ • ʮ΍ΏΑʯ΍ʮΘʯͰϏοτγϑτΛ࢖͏ͷ͸ͪΐͬͱ΍Γ͔͗͢΋ʁ

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ൃలฤɿਏޱόʔδϣϯ΋͋Γ·͢🌶 • ࠓճରԠΛݟૹͬͨ఺ࣈʹ΋ରԠ͢Δɺਏޱόʔδϣϯ΋͋Γ·͢ ‣ ਏޱͷೖྗྫʮͪʔͨʔʯʮͺΜͩʯʮ͖Μ͗ΐʯʮΒͬ͜ʯͳͲ • ςετύλʔϯ͸Լهϖʔδʹࡌ͍ͤͯ·͢  https://gist.github.com/JunichiIto/1c8565bbffd0b5cf589b905f9ad2388f • ڵຯ͕͋Δํ͸ͪ͜Βʹ΋νϟϨϯδʂ • ͪͳΈʹ๻ͷ໛ൣղ౴ͩͱTenjiΫϥεͷߦ਺͸108ߦͰͨ͠  https://github.com/JunichiIto/tenji-maker-challenge-for-ginza-rails/blob/karakuchi-answer/lib/tenji.rb

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ͱ͜ΖͰ

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ϏοτԋࢉʁύλʔϯϚονʁʁ ͦ΋ͦ΋Α͘Θ͔ͬͯͳ͍͔΋…

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ϓϩΛ໨ࢦ͢ਓͷͨΊͷ3VCZೖ໳ [վగ2൛] ҏ౻ ३Ұ ஶ ൃച೔ 2021೥12݄2೔ ٕज़ධ࿦ࣾ / 3,278ԁʢ੫ࠐʣ ͦΜͳ͋ͳͨʹʂ • վగ2൛Ͱ͸Ruby 3.0ʹϑϧରԠ • Ϗοτԋࢉ΋ύλʔϯϚον΋શ෦ ࡌͬͯ·͢ • ಛʹύλʔϯϚονͷઆ໌ʹؔͯ͠͸ ੈքτοϓϨϕϧʂʁ

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Rubyίϛολ⁋ຊ͞ΜʹΑΔਪનͷݴ༿ https://twitter.com/k_tsj/status/1469535631995191303

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ஸೡͳઆ໌ͱ๛෋ͳαϯϓϧίʔυ

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FAQ Q. ͯ͞͸͓લɺຊͷએ఻Λ͢ΔͨΊʹ͜ͷ໰୊Λ࡞ͬͨͳʁ A. ͍͍͑͑ʂ ύλʔϯϚονΛ࢖͓͏ͱࢥͬͨͷ͸໰୊Λ࡞ͬͨޙͰ͢ʂʂʢ΄Μͱʹʣ

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͍͞͝ʹ

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About me • ҏ౻ ३Ұ • ιχοΫΨʔσϯͷRailsϓϩάϥϚ • ϑΟϤϧυϒʔτΩϟϯϓͷϝϯλʔ • QiitaϥϯΩϯά1Ґʢ2022೥1݄ݱࡏʣ • Twitter @jnchito • Blog https://blog.jnito.com/

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ฐࣾڠࢍͷϋοΧιϯΠϕϯτ͕͋Γ·͢ʂ https://tsukuaso.connpass.com/event/234370/ • 2022.2.17ʙ25։࠵ɺࢀՃඅແྉ • ߽՚ͳ෭৆Λ༻ҙ͍ͯ͠·͢🎁 • Կ͔࡞Δ͜ͱ͕େ޷͖ͳํ͸ʮୈ2ճ πΫͬͯΞιͿϋοΧιϯʯ΁ʂ

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Everyday Rails RSpecʹΑΔRailsςετೖ໳ Aaron Sumner ஶɺҏ౻ ३Ұ ༁ ൢചՁ֨ 19.00 USD ࠓ͚ͩ16.99 USD Ξοϓσʔτ͠·ͨ͠ʂ • αϯϓϧΞϓϦΛRails 7.0Խ • ࠷৽ͷRSpec΍gemʹରԠ • ظؒݶఆͰ 16.99υϧͰൢചத • RSpecΛϚελʔ͍ͨ͠ํ͸ͥͻʂ https://leanpub.com/everydayrailsrspec-jp/

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ຊ೔ͷ·ͱΊ

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͜ͷߨԋͰֶΜͰ΄͍͜͠ͱʢ࠶ܝʣ • ࣗ෼͕ॻ͍ͨίʔυͱଞͷਓ͕ॻ͍ͨίʔυΛݟൺ΂ͯΈΑ͏ • ͍ΖΜͳϩδοΫͷߟ͑ํΛֶ΅͏ • Rubyͷݴޠػೳ΍ศརͳϝιουʹֶ͍ͭͯ΅͏ • ͜͜ͰֶΜͩ಺༰Λ໌೔͔Βॻࣗ͘෼ͷίʔυʹ׆͔ͯ͠ΈΑ͏ • Կ͔ͻͱͭͰ΋໾ཱͭ৘ใ͕͋Ε͹޾͍Ͱ͢😊

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ Ξϯέʔτͷճ౴΋͓଴͍ͪͯ͠·͢ʂ