開発者だけでソフトウェア設計をしてはいけない理由

by mather

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։ൃऀ͚ͩͰ ιϑτ΢ΣΞઃܭΛ ͯ͠͸͍͚ͳ͍ ཧ༝ ೆ۝भιϑτ΢ΣΞઃܭLabo vol.1 #ddd_labo ܂ാӳࢿ

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ࣗݾ঺հ • גࣜձࣾΞϥλφ • 2೥લ·Ͱ౦ژͷձࣾͰۈ຿ • ݩ਺ֶઐ߈ʢ੔਺࿦ʣ • ޷͖ͳݴޠɿHaskellͱ͔Scalaͱ͔ • झຯɿεΩϡʔόμΠϏϯάɺΧϝϥ

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μΠόʔ஥ؒɹืूதʂ

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͓͜ͱΘΓ • աڈͷιϑτ΢ΣΞઃܭɾ։ൃͷܦݧஊ • ࣦഊͷࣄྫ͔Βֶͼ͍ͨ • ※͋͘·Ͱ΋ݸਓͷײ૝Ͱ͢

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Agenda • എܠ • ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ • Կ͕ى͔ͬͨ͜ʁ • ໰୊఺͸Կ͔ʁͲ͏͢Ε͹վળͰ͖ͨͩΖ͏͔ʁ • υϝΠϯۦಈઃܭ΁ͷಓ

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Agenda • എܠ • ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ • Կ͕ى͔ͬͨ͜ʁ • ໰୊఺͸Կ͔ʁͲ͏͢Ε͹վળͰ͖ͨͩΖ͏͔ʁ • υϝΠϯۦಈઃܭ΁ͷಓ

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എܠ ͱ͋Δձࣾ ϚʔέςΟϯάπʔϧ (ASP)

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ϚʔέςΟϯάπʔϧʁ

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طଘϓϩμΫτͷঢ়ଶ • ౓ॏͳΔཁٻΛগͣͭ͠௥Ճ࣮૷ͯ͠ϦϦʔε • طଘػೳͷվम͸σάϨ͕ාͯ͘Ͱ͖ͳ͍ • ΄΅ಉ͡ػೳΛίϐϖͯᷖ͠ճίʔυͷྔ࢈ • εύήςΟίʔυ ƅшƅ)řŵŖ • ֦ுੑͷݶք͕དྷ͍ͯΔ…ʂ

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എܠ 2ձࣾ͸΋ͬͱ੒௕͍ͨ͠ɻ  ɹιϑτ΢ΣΞ։ൃ͸ࠓޙͲ͏͢Ε͹Α͍͔ʁ ᶃগͣͭ͠ϦϑΝΫλϦϯά͢Δɻ ᶄ࣍ظόʔδϣϯͷ։ൃɾҠߦΛݕ౼͢Δɻ ᶅͲ͏ʹ΋ͳΒͳ͍ɻݱ࣮͸ඇ৘Ͱ͋Δɻ

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എܠ ᶃճؼςετ͕ͳ͘ɺ࢓༷ʹ͍ͭͯ೺ѲͰ͖ͯ ͍Δਓ͕͍ͳ͍ͨΊɺϦϑΝΫλϦϯάͷਖ਼͠ ͞Λ୲อͰ͖ͳ͍ɻ ᶄಉ͘͡ϝϯόʔ͕࢓༷ʹ͍ͭͯ໌Δ͘ͳ͍ɻ  ߋʹɺઐ༻γεςϜ΍ΧελϚΠζΛՃ͍͑ͯ Δސ٬΋ଘࡏ͢ΔͨΊɺҠߦ͕Ͱ͖ͳ͍Մೳੑ ͕ߴ͍ɻ

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౴͑ᶅ ౴͑ᶅ ౴͑ᶅ

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δϦශϓϩμΫτ ͋Δ͋Δ

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͜͜Ͱ੨ఱͷᯡᯧ

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΍ͬͺΓ ࣍ظόʔδϣϯΛ࡞ͬͯ Ṣճ͢Δͧʂʂʂ by Ғ͍ਓ at ࣾһ૯ձ

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࣍ظόʔδϣϯͷ։ൃ͸ ͦΜͳ͜ΜͳͰ ϓϩδΣΫτԽ͞Εͨ ಥવ

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Agenda • എܠ • ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ • Կ͕ى͔ͬͨ͜ʁ • ໰୊఺͸Կ͔ʁͲ͏͢Ε͹վળͰ͖ͨͩΖ͏͔ʁ • υϝΠϯۦಈઃܭ΁ͷಓ

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ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ ཁ݅ఆ͔ٛΒड͚ೖΕςετ·Ͱ։ൃͰߦ͏׳ྫ վળཁ๬ όάใࠂ ཁ݅ఆٛ ઃܭ ࣮૷ ςετ ӡ༻

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ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ ಺෦ߏ଄΍໰୊఺͸։ൃऀ͔͠ཧղͰ͖ͳ͍(?)

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ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ ৽͍ٕ͠ज़΍࠷৽൛ͷػೳΛऔΓೖΕ͍ͨ 7 or 8 (6͸EOL)

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ཁ͢Δʹ

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։ൃ෦໳͚ͩͰ ։ൃ͍ͯ͠Δͱ͍͏ ࣗෛ

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Agenda • എܠ • ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ • Կ͕ى͔ͬͨ͜ʁ • ໰୊఺͸Կ͔ʁͲ͏͢Ε͹վળͰ͖ͨͩΖ͏͔ʁ • υϝΠϯۦಈઃܭ΁ͷಓ

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Կ͕ى͔ͬͨ͜ʁ • ΩοΫΦϑ&։ൃ߹॓ • ཁ݅Λूதతʹٞ࿦ʢͨͭ͠΋Γʣ • ཉ͍͠ػೳɾ࢒͢ػೳɾফ͢΂͖ػೳΛ  ։ൃऀࢹ఺Ͱग़͚ͨͩͩͬͨ͠ • େ෩࿊ෑΛ޿͕͛ͨ̎ϲ݄ޙʹ͸ফ͑ͨ

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Կ͕ى͔ͬͨ͜ʁ • ͍͟։ൃελʔτͨ͠΋ͷͷ… • ·ͣಈ͘΋ͷΛ࡞ͬͯ։ൃͯ͠·͢Ξϐʔϧ • Ͱ΋ɺ୭ʹݟͤΕ͹͍͍ʁ • ͲΜͳػೳ͕ඞཁ͔͸୭͕ܾΊΔʁ • ϓϩμΫτΦʔφʔͷ࣮࣭తෆࡏ

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Կ͕ى͔ͬͨ͜ʁ • ୭΋࢖ͬͯ͘Εͳ͍ͷͰখن໛Ҋ݅ʹ౤ೖ(!) • ϕʔλ൛ͷ͸ͣͩͬͨͷʹ̍೥ܖ໿ • ͳ่͠͠తʹػೳ֬ఆ͠ɺϦϑΝΫλෆೳʹ • ύονΞοϓσʔτͷ࢝·Γ • ڧ྽ͳطࢹײ

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Կ͕ى͔ͬͨ͜ʁ • ӦۀʮͰɺطଘͷػೳA͸࢖͑·͔͢ʁʯ • ൚༻ੑΛҙࣝͯ͠εϦϜʹ෼ղ͍ͯͨ͠ • ૊Έ߹ΘͤΕ͹ಉ͜͡ͱ΋࣮ݱͰ͖Δ͸ͣʁ • Ӧۀʮ෼͔Βͳ͍ʯʮސ٬ʹઆ໌Ͱ͖ͳ͍ʯ • Ӧۀ޲͚આ໌ॻΛ࡞Δඞཁ͋Γʁ

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Կ͕ى͔ͬͨ͜ʁ • چόʔδϣϯ͔Βͷސ٬ͷҠߦ͸Մೳ͔ʁ • ։ൃऀʮچver.ͷσʔλߏ଄ͷ໰୊఺Λղܾ ͢Δ΋ͷͰ͋ΔͨΊҠߦ͸ۃΊͯࠔ೉ʯ • ӦۀʮεϜʔζʹҠߦͰ͖ͳ͍ͱചΕͳ͍ʯ • Ғ͍ਓʮҠߦ͸ඞਢɻͳΜͱ͔ͤΑɻʯ

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Ͳ͏ͯ͜͠͏ͳͬͨʁʁʁ

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Agenda • എܠ • ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ • Կ͕ى͔ͬͨ͜ʁ • ໰୊఺͸Կ͔ʁͲ͏͢Ε͹վળͰ͖ͨͩΖ͏͔ʁ • υϝΠϯۦಈઃܭ΁ͷಓ

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ސ٬ͷۀ຿Ͱ࢖͏ͨΊͷπʔϧ։ൃ ͳͷʹ ސ٬ۀ຿Λ஌͍ͬͯΔϝϯόʔ͕͍ͳ͍··ઃܭ ར༻ঢ়گΛ͖ͪΜͱ೺Ѳ͠ ࣮ࡍͷސ٬ۀ຿Λ஌Δϝϯόʔͱ ϢʔεέʔεΛ࡞Δ΂͖

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ސ٬ۀ຿͸ଟذʹΘͨΔ੡඼ͷͨΊ ࢥ͍ͭ͘৭ʑͳύλʔϯʹରԠͰ͖ΔΑ͏ʹ ֦ுੑͱ൚༻ੑΛॏࢹͯ͠͠·ͬͨ Ϣʔεέʔεʹݟ߹͏࠷খͷߏ੒͔Β࢝ΊΔ΂͖ ͍͔ͭ͘ͷέʔεʹର͢Δ࣮૷Λ ͋ͱͰϦϑΝΫλ͢Ε͹ྑ͍

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࠷খߏ੒ͷཁ͕݅Θ͔Βͳ͍ ෆཁͳ΋ͷΛ૊ΈࠐΜͰͳ͍͔൑ఆͰ͖ͳ͍ ۀ຿Λཧղ͍ͯ͠Δ εςʔΫϗϧμʔΛཱͯΔ΂͖

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چver.ͷػೳ໊΍ϫʔΫϑϩʔΛ ҙࣝͯ͠͠·͏͜ͱͰ ಉ͡ػೳΛম͖௚͠Ͱ࡞ͬͯ͠·͏ چver.ͷ׳शతͳࣾ಺༻ޠΛ੔ཧ ຊདྷͷۀ຿ʹඞཁͳ༻ޠΛ࢖͏

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࣍ظόʔδϣϯͱฉ͍ͯಥͬ૸ΔΞϗʢࣗ෼ʣ ̍ਓͰScala, AkkaͰ෦෼తͳػೳΛ࣮૷ ؔ਺ܕ΍ActorϞσϧͷฒߦੑʹϋϚΔ ͱΓ͋͑ͣམͪண͚ ࣗ෼Ҏ֎Ͱ΋อकՄೳͳݴޠΛબͿ΂͖ ʢͱ͸͍͑ݸਓతʹ͸ྑ͍ܦݧʣ

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Agenda • എܠ • ͳͥ։ൃऀ͚ͩͰઃܭͨ͠ͷ͔ʁ • Կ͕ى͔ͬͨ͜ʁ • ໰୊఺͸Կ͔ʁͲ͏͢Ε͹վળͰ͖ͨͩΖ͏͔ʁ • υϝΠϯۦಈઃܭ΁ͷಓ

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๻ͷυϝΠϯۦಈઃܭ΁ͷಓ • ʮ༻ޠ੔ཧʯΛ͍ͨ͠ɺͱ͍͏ཉٻ͔Β • ΩʔϫʔυʮϢϏΩλεݴޠʯ͔ΒDDD΁ • ۀ຿ʹԊͬͯιϑτ΢ΣΞΛ։ൃ͢Δ֓೦ʹ ಉҙ • ݱࡏͷ։ൃͷ໰୊఺͕ஈʑݟ͑ͯ͘Δ

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υϝΠϯۦಈઃܭ΁ͷಓ • ސ٬ͷۀ຿Λ஌ΔਓΛҾ͖ࠐΉ  ʢυϝΠϯΤΩεύʔτʣ • ۀ຿ͷ֓೦Λద੾ʹදݱ͢Δݴ༿Λߏங͢Δ  ʢϢϏΩλεݴޠʣ • ϓϩμΫτͷଟ༷ԽͱίϯςΩετ΁ͷ෼ղ

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ํ๏࿦Ͱͳ͍υϝΠϯۦಈઃܭ • ։ൃͰؕΓ͕ͪͳ໰୊఺Λ໌֬ʹ͢ΔͨΊͷ ࢥߟํ๏ͷҰͭ • ໨ͷલͷ࣮૷΍ࣗ෼ͷ୲౰ྖҬ͚ͩʹಛԽ͠ ͨ࠷খྖҬͰकΓʹೖͬͯ͸͍͚ͳ͍ • ۀ຿ʹଈͨ͠ʮՁ஋ͷ͋ΔϓϩμΫτʯΛಧ ͚ΔͨΊͷ࠷దͳߏ੒Λߟ͑Δ΂͖

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