『Swift実践入門』制作の舞台裏

by 稲尾尚徳

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ʰ4XJGU࣮ફೖ໳ʱ  ੍࡞ͷ෣୆ཪ Ҵඌঘಙ 8&#%#13&44ฤू෦ʢٕज़ධ࿦ࣾʣ ʰ4XJGU࣮ફೖ໳ʱץߦه೦5FDI5BMLT

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લఏ ͜͜ʹ͍Βͬ͠ΌΔΑ͏ͳษڧ೤৺ͳํʑ͸ɺ ࣥ͝චऀʹͳΓ͏Δํʑͩͱࢥ͍·͢ͷͰɺ ͦͷલఏͰ͓࿩͍͖ͤͯͨͩ͞·͢

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ͲΜͳࡶࢽɾॻ੶Λ  ࡞͍ͬͯΔ͔  ʢࣗݾ঺հʹ͔͑ͯʣ

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8&#%#13&44 w೥૑ץͷִ݄ࢽ w7PM͸ຊ೔ൃചʂ wདྷि7PMͷاըձٞ

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8&#%#13&44QMVT w೥ץߦ։࢝ wطץ࡭

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γϦʔζۙץ ޷ධൃചத ݄೔ ൃച༧ఆ

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੍࡞؀ڥ

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ओͳπʔϧ w(JU)VCͰݪߘ؅ཧ wNEJOBPͰݪߘςΩετͷม׵ w"EPCF*O%FTJHOͰࢴ໘ϨΠΞ΢τ wDPEFHFOTXJGUͰαϯϓϧίʔυநग़  ʢຊॻ༻ͷ৽ฌثʣ

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(JU)VCͰݪߘ؅ཧ wஶऀͱฤूऀ͕࢖͏ wه๏͸.BSLEPXO wͦΕͧΕͷ࡞ۀ͸ɺ8*1ʢ8PSL*O1SPHSFTTʣͳ  1VMM3FRVFTUΛग़ͯ͠ߦ͏ ૿࡮ʢະఆʣʹ  ޲͚ͯݱࡏਐߦத ͷ1VMM3FRVFTU

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NEJOBPͰݪߘͷม׵ wฤूऀ͕࢖͏ w.BSLEPXOͰॻ͔ΕͨݪߘΛɺ8&#%#13&44 8&#%#13&44QMVT༻ͷ*O%FTJHOλά෇͖ςΩετ ʹม׵͢Δ w ݟग़͠ɺຊจɺ஫ऍͳͲͷจࣈؔ܎ΛࣗಈϨΠΞ΢τ w ը૾ɺදͳͲͷผΦϒδΣΫτ΋ͷ͸खಈ w!OBPZB͞Μɺ!IPLBDDIB͞Μɺ!UZQFTUFS͞ΜΒ࡞ wࣗ෼Ͱ໊෇͚ͨΘ͚Ͱ͸ͳ͍Ͱ͢

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"EPCF*O%FTJHOͰ  ࢴ໘ϨΠΞ΢τ wϨΠΞ΢τ୲౰ऀ͕࢖͏ ͜ͷϖʔδʹ͸ਤද ͕ͳ͍ͷͰɺ*O%FTJHO λά෇͖ςΩετΛ  ྲྀ͠ࠐΊ͹΄΅ϨΠ Ξ΢τ׬ྃ

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͜͜·Ͱͷπʔϧʹ͍ͭͯৄ͘͠͸ɺ  ೥ͷ(JU)VC,BJHJͰͷൃදࢿྉ  ʮ(JU)VCͰࡶࢽɾॻ੶Λ࡞ΔʯΛ͝ཡ͍ͩ͘͞ IUUQXXXTMJEFTIBSFOFUJOBPHJUIVCLBJHJ

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DPEFHFOTXJGUͰίʔυநग़ wஶऀͱฤूऀ͕࢖͏ wຊॻ༻ʹஶऀ͞Μ͕৽։ൃ wίϚϯυҰൃͰɺݪߘςΩετ͔ΒίʔυΛൈ͖ ग़͠ɺ഑෍༻ͷ1MBZHSPVOEϑΝΠϧΛੜ੒͢Δ wશମͰ΋ͷίʔυย͕͋ΔͨΊɺखಈͩͱ ϛε͕ൃੜ͢Δ wಈ࡞֬ೝͰ͖ΔͨΊɺࢴ໘ͷ඼࣭޲্ʹ΋׆༂

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͜Μͳײ͡Ͱɺষ͝ͱͷ1MBZHSPVOEϑΝΠϧΛɺ  ίʔυย͝ͱʹϖʔδΛ෼͚ͯੜ੒ͯ͘͠ΕΔ

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ץߦ·Ͱͷ෣୆ཪ

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ϑΣʔζ wاը wࣥච w૬ޓϦϥΠτ wฤू w੍࡞

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اըͷਐΊํ wίϯηϓτɺର৅ಡऀɺର৅ൣғͳͲΛݻΊΔ wৄࡉͳΞ΢τϥΠϯʢ໨࣍ʣʹམͱ͠ࠐΉ ʮର৅ಡऀͷ͏ͪҰ൪લఏ஌ࣝͷͳ͍ํ͕ɺ  ɹΞ΢τϥΠϯΛಡΉ͚ͩͰɺຊॻͷετʔϦʔΛ  ɹཧղͰ͖ΔΑ͏ʹ͍ͯͩ͘͠͞ʯ

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اըεέδϡʔϧ wɿΩοΫΦϑ wɿΞ΢τϥΠϯܾఆ ϲ݄ؒ ݟग़͠਺͸ ʢץߦ࣌͸ʣ

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ࣥචͷਐΊํ w!JTILBXB͞Μ͸ɺલ൒ͷجຊষ͔Βॻ͘ w!ZVTFJOJTIJZBNB͞Μ͸ɺޙ൒ͷ࣮ફষ͔Βॻ͘ ʮಡऀͷํ͕ιʔείʔυ΍දͳͲΛಡΈඈ͹ͯ͠ ɹຊจ͚ͩΛಡΜͰ΋ɺେҙ͸௥͑ΔΑ͏ʹॻ͍ͯ  ɹ͍ͩ͘͞ʯ

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ࣥචεέδϡʔϧ wɿࣥචελʔτ wɿશষ୤ߘ ϲ݄ؒ ͓Ұਓ͋ͨΓ݄ষϖʔε

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͔͜͜Β͕ຊ൪ ຊॻͰ͸ɺ͔͜͜ΒͷϒϥογϡΞοϓʹ  ྗΛ஫͗·ͨ͠ ୤ߘ ॳߍ ೖߘ

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૬ޓϦϥΠτͷਐΊํ w୲౰ষΛަ୅ͯ͠૬ޓϦϥΠτΛߦ͏ w ڞஶʹΑΔσϝϦοτΛͳͨ͘͢Ί w આ໌ͷաෆ଍ɺ༻ޠͷෆ౷Ұɺจମͷ૬ҧ wࣥචऀຊਓ͡Όͳ͍ͱमਖ਼Ͱ͖ͳ͍΋ͷ͸ɺ*TTVFԽ͢Δ wϨϏϡϫʔͷํʹΑΔϨϏϡʔ΋ฒߦͯ͠ߦ͏ ʮଞਓͷจষΛมߋ͢Δͷ͸ؾ͕ͻ͚Δ͔ͱ ɹࢥ͍·͕͢ɺࣗ͝਎ͷจষΛਪᏏ͍ͯ͠Δͱ ɹ͓ࢥ͍ʹͳͬͯϦϥΠτ͍ͯͩ͘͠͞ʯ

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૬ޓϦϥΠτͷεέδϡʔϧ wɿ૬ޓϦϥΠτɺϨϏϡʔελʔτ wɿ૬ޓϦϥΠτɺϨϏϡʔ׬ྃ wɿϑΟʔυόοΫ΁ͷରԠ׬ྃ ϲ݄ؒ

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ฤूͷਐΊํ w૬ޓϦϥΠτͱಉ༷ʹɺϦϥΠτ͸௚઀ߦ͏ wෳ਺ষʹؔΘΔϑΟʔυόοΫ͸ɺ*TTVFԽ͢Δ wͦͷষݻ༗ͷϑΟʔυόοΫ͸ɺݪߘதʹ˒Ͱ ׅͬͯίϝϯτ͢Δ w ˒˓˓ͳͲͷ˒ϥΠϒϥϦ͕͋Γ·͢ɻ w ˒ͳͥɺ☓☓ͳͷ͔͕ͪΐͬͱΘ͔Γ·ͤΜͰ ͨ͠˒

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ฤूεέδϡʔϧ wɿฤू෦ߍਖ਼ελʔτ wɿฤू෦ߍਖ਼׬ྃ wɿฤू෦࠶ߍਖ਼׬ྃ w શମతʹେ͖͘มΘͬͨͷͰ΋͏Ұ౓ w ୤ߘ࣌ʹൺ΂ɺ໿ഒɺϖʔδ૿͍͑ͯͯযΔ wɿฤू෦࠶ʑߍਖ਼׬ྃ w 4XJGUରԠɺඇॏཁ߲໨ͷ࡟আͳͲͨͨ͠Ίࠩ෼Λ֬ೝ ϲ݄ؒ ʢ4XJGU߹Θͤʹมߋͨͨ͠Ίͱɺح਺݄͸  ɹࡶࢽͷ࡞ۀΛ͍ͯ͠ΔͨΊΏͬ͘Γϖʔεʣ

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੍࡞ͷਐΊํ w*O%FTJHOͰ࡞ͬͨຊ൪ήϥ΁ͷஶऀ͝ߍਖ਼݁Ռ΋ɺ ͜Ε·ͰͲ͓Γ1VMM3FRVFTUͰ΋Β͏ wͦΕΛϨΠΞ΢τ୲౰ऀʹ఻͑Δͷ͸੺ೖΕͰ w͜ͷஈ֊Ͱͷมߋ͸࡞ۀϛε͕ൃੜ͠΍͍͢ͷͰɺ  ฤूஈ֊ͰۃྗΫΥϦςΟΛ্͓͛ͯ͘ ʮʯͱ͔͸  ࠩ෼ςΩετͷ൪߸

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੍࡞εέδϡʔϧ wɿॳߍ׬੒ wɿ೦ߍ׬੒ʢෳ਺ճʣ wɿҹ࡮ॴೖߘʂ ϲ݄ؒ

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਺ࣈͰΞϐʔϧ ͜ͷຊ͸ɺΑΓྑ͍ຊΛ໨ࢦͯ͠  ΈΜͳͰྗΛ߹Θͤͯ޻਺Λ͔͚ա͗  ͘Β͍͔͚ͯ࡞ͬͯ͠·͍·ͨ͠ͷͰɺ  ʮ͕Μ͹ͬͨΞϐʔϧʯΛ͍ͤͯͩ͘͞͞

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(JU)VC wίϛοτ਺ɿ w1VMM3FRVFTU਺ɿ w*TTVF਺ɿ ୤ߘ ॳߍ ೖߘ

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ϛʔςΟϯάͱΧϯρϝ wϛʔςΟϯάɿճ w ͍͍݄ͩͨҰ͘Β͍ wΧϯρϝɿճ w ༧ఆΑΓ஗Ε͕ੜͨ͡ͱ͖ʹߦ͏ w େ൒͸ஶऀ͞Μ͓ೋਓͰɻͨ·ʹશһͰ w ʮ૭ͷͳ͍ձٞࣨͰͰ͔͢ʁʯ

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ʮ*TTVFରԠɺ˒ରԠɺಈ࡞֬ೝͰ  ͓ೋਓͦΕͧΕ໿͔͔࣌ؒΔ  ͱ͍͏ݟੵ΋ΓͰ͢Ͷɻ ٳ೔͸೔࣌ؒɺฏ೔͸ຖ೔࣌ؒɺ ࡞ۀ͍ͯͩ͘͠͞ʯ    ͳͱ͖ͷϗϫΠτϘʔυ

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ߍਖ਼ wॴཁ࣌ؒɿ࣌ؒ w ࡞ۀ೔ w ೔͋ͨΓ࣌ؒ wϑΟʔυόοΫ਺ʢ˒΍*TTVFʣɿ ʢલड़ͨ͠ฤूϑΣʔζͰͷ΋ͷͰ͢ɻ૲ߘஈ֊΍ॳߍ׬੒  ɹҎޙͷ΋ͷ͸ɺܭଌͯ͠ͳ͍ͷͰؚ·Ε͍ͯ·ͤΜʣ

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·ͱΊ

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͓ೋਓ͔ͩΒͦ͜ɺ͏·͍ͬͨ͘ wࣄલʹ໘ࣝͳ͠ w ஶऀ͞ΜͲ͏͠΋ɺஶऀ͞Μͱฤूऀ΋ w೥ϲ݄ؒͱ͍͏௕ظϓϩδΣΫτ w͜͜·Ͱઆ໌͖ͯͨ͠Α͏ͳաෛՙ w͝స৬ɺ͓ࢠ༷ͷ஀ੜɺ௕ظग़ுɺւ֎సۈ ͳͷʹɺ͔ͤͬ͘ͷٳ೔ʹɺ૭ͷͳ͍ձٞࣨͰͷ  ΧϯρϝதͰ͋ͬͯ΋ɺݥѱͳงғؾʹͳͬͨΓ  ͨ͜͠ͱ͸Ұ౓΋͋Γ·ͤΜͰͨ͠☺

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4XJGUͷఆ൪ॻΛ໨ࢦ͍ͨ͠ վగΛॏͶͳ͕Βɺ௕೥Ѫ͞ΕΔ4XJGUͷఆ൪ॻ ʹͳΔ͜ͱΛ໨ඪʹ͍ͯ͠·͢ɻ Ͱ΋ɺॳ൛͕ͪΌΜͱചΕͳ͍͜ͱʹ͸ɺվగ Ͱ͖·ͤΜɻ ͥͻɺ͝ߪಡ͍ͩ͘͞ɻ ͦͯ͠ྑ͍ຊͰͨ͠Βɺपғͷํʹ΋קΊͯͩ͘ ͍͞ʂ

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͝੩ௌ͋Γ͕ͱ͏  ͍͟͝·ͨ͠