コード改善ことはじめ

by Satoshi Honda

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ίʔυվળ͜ͱ͸͡Ί @Satoshi Honda

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ຊձΛ։͍ͨܦҢ

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1)1ίʔυվળNFFUVQ

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1)1ίʔυվળNFFUVQ

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ίʔυվળNFFUVQ

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ʮίʔυվળ͜ͱ͸͡Ίʯ

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ٕज़తͳෛ࠴

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w ΞʔΩςΫνϟ w σʔλϕʔε w %%% w ϚΠΫϩαʔϏε w ࣗಈԽ w ςετ w Ϣχοτ w && w Πϯϑϥ w σϓϩΠ w ίʔσΟϯάϧʔϧͷ४ڌνΣοΫ w $* w ϫʔΫϑϩʔ w νϡʔχϯά w πʔϧ ෛ࠴ͷฦࡁखஈ

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खஈ͸৭ʑ͋Γ·͚͢Ͳɺ Ͱ͖͍ͯͳ͍͔ͬͨ͜ͱ͕ଟʑ͋Γ·͢Ͷ

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w ॳظɿ্ཱͪ͛ w ΤϯδχΞ͕࡞͍ͬͯͳ͍ w ίετΛ཈͑ΔͨΊʹ҆͘  w ʙதظɿ୹ظతͳऩӹ֫ಘʹΑΔࢪࡦ w རӹʹͳΔ͜ͱɺεϐʔυ༏ઌ w ू٬ɾ࠾༻΁ͷ౤ࢿ w ֎෦ఏܞ w ΤϯδχΞҎ֎ͷ֤ઐ໳ྖҬͷ࠾༻ ૊৫ͱͯ͠ͷഎܠʢࠓ·Ͱͷܦݧ্ʣ

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୹ ظ த ௕ ظ λ ε Ϋ

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୹ ظ த ௕ ظ λ ε Ϋ w ίʔυվળ w ϫʔΫϑϩʔվળ w ࣗಈԽ w ඪ४Խ w υΩϡϝϯτ੔උ

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୹ ظ த ௕ ظ λ ε Ϋ ͕࣌ؒऔΕͣෛ࠴͕ͨ·Γ͕ͪ ☓ w ίʔυվળ w ϫʔΫϑϩʔվળ w ࣗಈԽ w ඪ४Խ w υΩϡϝϯτ੔උ

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૊৫Λ੒௕ͤ͞Δ্Ͱ ඞͣʁ௨Δಓ

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૊৫ߏ଄ͷมԽ Ӧۀ Ϛʔέ اը ΤϯδχΞ ϓϩμΫτ

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૊৫ߏ଄ͷมԽ Ӧۀ Ϛʔέ اը ΤϯδχΞ ϓϩμΫτ ަব͕͏·͍੎ ަবۤख੎

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૊৫ߏ଄ͷมԽ Ӧۀ Ϛʔέ اը ΤϯδχΞ ͍ͭͷؒʹ͔τοϓμ΢ϯߏ଄ ϓϩμΫτ

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w ෦෼తͳ࠷దԽ w ຊདྷ΍Δ΂͖λεΫ͸ޙճ͠ʢͪΓ΋ੵ΋Ε͹ࢁͱͳ Δʣ w εϐʔυ༏ઌ೴ w ಈ͔͢͜ͱ͕༏ઌɺ඼࣭͸ޙख w طଘίʔυͷ࠶ར༻ w ϨϏϡʔΛऔΓೖΕ͍ͯΔ͚Ͳɺ࣭͕͕͋ͳΒ͍ w ඼࣭վળɺ͕࣌ؒͱΕͳ͍ܧଓ͠ͳ͍ ׳Ε͸ຊ౰ʹා͍

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ٕज़Λ෢ثʹ w αʔϏεͷ҆ఆՔಇ w վળͷ1%$"αΠΫϧΛߴ଎Խͤ͞Δ w ϏδωεͷมԽʹॊೈʹରԠͤ͞Δ ΤϯδχΞͷ໾ׂ

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Ϣʔβ΁ܧଓͯ͠Ձ஋Λఏڙ͠ɺରՁΛಘΔ Ϗδωεͱͯ͠ͷվળ

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୭ͷ੹೚Ͱ΋ͳ͘ ૊৫ʢਓʣ͕੒௕͢Δաఔ Ͱىͬͨ͜ɺ૊৫Ͱͷෛ࠴

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w ௐࠪɾόάͷൃੜ཰͕͕͍͋ͬͯΔ w ରԠ࿙Εͷൃੜ཰͕͕͍͋ͬͯΔ  㱺मਖ਼ʹΑΔӨڹൣғେ w ֦ு͕ࠔ೉Ͱɺमਖ਼޻਺͕͕͍͋ͬͯΔ w ίϛϡχέʔγϣϯίετ͕͕͍͋ͬͯΔ w ੔උ͞Εͳ͍υΩϡϝϯτɺଐਓత࡞ۀ  τϨʔχϯάίετ΋͕͍͋ͬͯΔ ͱ͸͍͑

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࣌͸ۚͳΓ 5JNFJT.POFZ

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Ϣʔβ΁ܧଓͯ͠Ձ஋Λఏڙ͠ɺରՁΛಘΔ Ϗδωεͱͯ͠ͷվળ ☓ ຊ຤స౗

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w ίʔυվળ w ϫʔΫϑϩʔվળ w ৽ٕज़ͷಋೖ w ඪ४Խ w υΩϡϝϯτ੔උ ୹ ظ த ௕ ظ λ ε Ϋ ෛ࠴͸ى͖Δલఏ͚ͩͲ

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63-ɿIUUQCMPHNBEPSPPSHNO

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63-ɿIUUQTTQFBLFSEFDLDPNOBPZBLBJGB[V[IJGBMTFNBOF[JNFOUP

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ʮίʔυվળ͜ͱ͸͡Ίʯ

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՝୊ೝࣝͷڞ༗ ΦʔϓϯԽ

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ʮ͓લ୭ͩΑʯ

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w ϑΣΠεɾτΡɾϑΣΠε w ҿΈɾϥϯν w ։ൃ.UH w ίʔυ w ϨϏϡʔ w ػೳ௥Ճɾόάमਖ਼ w ՝୊ͷ৘ใΛΦʔϓϯԽ w ೔ใ w JTTVFͷ׆༻ ίϛϡχέʔγϣϯͷػձΛ૿΍͢

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༏ઌ౓͸ҧ͑Ͳ ͳΜͱ͔͠ͳͯ͘͸͍͚ͳ͍ ˣ ՝୊ͷೝࣝ͸օಉ͡

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ٕज़ͷඪ४Խ

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No content

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֤ηϯςϯεΛςʔϚʹɺϓϩμΫτίʔυ͔Β ಡΈ΍͍͢ͱײͨ͡ίʔυ ಡΈʹ͍͘ͱײͨ͡ίʔυ ٙ໰఺ ؾ͓෇͚͍ͨ͜ͱʢ࣮ફ͍ͨ͜͠ͱʣ Λ·ͱΊͯσΟεΧογϣϯ͢Δձ

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༻ޠXJLJ ϑϨʔϜϫʔΫͷऔΓܾΊ ෭࣍తޮՌ

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'BDFUP'BDFͷίϛϡχέʔγϣϯ ·ͩ·ͩ଍Γ͍ͯͳ͍

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۩ମతʹͨ͠ࢲ͔ΒͷΞΫγϣϯ ·ͩ͜͜·ͰͳΜͰ͕͢ʜ

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࣮੷஋ΛऔΔ࢓૊ΈʢՄࢹԽʣ ࣗൃతͳϝϯόͷΞΫγϣϯ

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վળͷ೔͕ग़དྷͨʂ

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୭ͷ੹೚Ͱ΋ͳ͘ ૊৫ʢਓʣ͕੒௕͢Δաఔ Ͱىͬͨ͜ɺ૊৫Ͱͷෛ࠴

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ࣗൃతͳΞΫγϣϯ ·ͣ͸खΛ্͛Δ

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࣮ݱ͍ͯ͠Δͱ͍͏͜ͱ͸ ૊৫ͱͯ͠ͷڞ௨ೝࣝͰ΋͋Δ

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Ϣʔβ΁ܧଓͯ͠Ձ஋Λఏڙ͠ɺରՁΛಘΔ Ϗδωεͱͯ͠ͷվળ

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ίʔυվળNFFUVQ ίʔυͷ࿩͢Δͧ

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ