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ϒϩάΛॻ͍ͯ΋Βཱ͍͍ͨ৔ͱͯ͠ ΍ͬͨ͜ͱɺߟ͍͑ͯΔ͜ͱ Ր 5FDI8SJUFST.FFUVQ Ϋϥεϝιουגࣜձࣾ͠Μ΍

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ࣗݾ঺հ

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ࣗݾ঺հ ͠Μ΍ TIJOZBB ೥લޙɿதখ4*FSॴଐ࣌୅ʹݸਓϒϩάΛ࢝ΊΔʗษڧձࢀՃϨϙʔτࣥචͰࣾ֎ަྲྀʹੵۃతࢀՃ ೥݄ɿΫϥεϝιουגࣜձࣾʹத్ೖࣾ "84ίϯαϧςΟϯά෦ ϏοάσʔλҊ݅ʹैࣄ ೥݄ɿσʔλΠϯςάϨʔγϣϯ෦ʹҟಈಉ্ ೥݄ɿσʔλΞφϦςΟΫεࣄۀຊ෦ʹҟಈಉ্ ೥݄ɿΞϥΠΞϯεࣄۀ෦ʹҟಈϞμϯσʔλελοΫ .PEFSO%BUB4UBDL ؔ࿈αʔϏεʹैࣄ ɾΫϥεϝιου೥໨ ɾΫϥεϝιουೖࣾҎདྷʰ೥ؒຊ౤ߘୡ੒ʱΛܧଓத ݱࡏ೥࿈ଓ ɾ௨ৗۀ຿ͱ߹Θͤͯϒϩάࣥච׆ಈʹؔΘΔ༷ʑͳܒ໤׆ಈΛ࣮ࢪɺల։ https://x.com/shinyaa31 https://dev.classmethod.jp/author/shinyaa31/ https://speakerdeck.com/shinyaa31/ https://www.linkedin.com/in/shinya-a-3589a7a4/

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୅දతͳʰϒϩάࣥචʱʹؔ͢Δ׆ಈ <೥> ݸਓϒϩάɺձࣾϒϩάΛ௨ͯ͡Πϕϯτ ࢀՃϨϙʔτΛຊ௒ࣥච ؾ෇͍ͨΒຊۙ͘ษڧձˍΠϕϯτϨϙʔτΛॻ͍͖ͯͯ ͨͷͰߟ͑ํͱ͔ॻ͖ํͱ͔Λ·ͱΊͯΈͨUFDIQVCc %FWFMPQFST*0IUUQTEFWDMBTTNFUIPEKQBSUJDMFTNZ XBZPGXSJUJOHFWFOUQBSUJDJQBUJPOSFQPSUCZ TIJOZBB <೥> %FWFMPQFST*0ஶऀਞʹର͠zϒϩάࣥචz ʹవΘΔ༷ʑͳτϐοΫͰΠϯλϏϡʔ͠ ͨهࣄΛʰͻͱΓΞυϕϯτΧϨϯμʔʱ ܗࣜͰ͓ಧ͚ %FWFMPQFST*0ஶऀͷΈΜͳʹ৭ʑฉ͍ͯΈͨ"EWFOU $BMFOEBSͷهࣄҰཡc%FWFMPQFST*0IUUQT EFWDMBTTNFUIPEKQSFGFSFODFDBUJOUFSWJFXTXJUI EFWFMPQFTJPCMPHHFSTBEWFOUDBMFOEBS <೥> %FWFMPQFST*0ࣥචʹ͓͚Δݦஶͳ׆ಈΛ͠ ͍ͯΔϝϯόʔʹొஃ௖͘ܗͷࣾ಺ษڧձ Λ࣮ࢪܭճɺొஃऀ਺ਓɺྦྷܭࢀՃऀ ਺ਓ௒ ࣾ಺Πϕϯτʰ%FWFMPQFST*0ϒϩάษڧձʱ։࠵಺ ༰ͷ·ͱΊ ͱৼΓฦΓˍ૯ׅ c%FWFMPQFST*0IUUQT EFWDMBTTNFUIPEKQBSUJDMFTSFQPSUEFWFMPQFSTJP CMPHHJOHDPOGFSFODFIJTUPSJFTBOETVNNBSZ <೥> ʰͻͱΓΞυϕϯτΧϨϯμʔʱ ೔ؒ ಛఆςʔϚͰϒϩά౤ߘΛॻ͖ܨ͙ͷΛ ਓͰ΍Δ Λݸਓతʹ௨ࢉճ࣮ࢪ ࣾ಺Πϕϯτʰ%FWFMPQFST*0ϒϩάษڧձʱͰ ʮΞυϕϯτΧϨϯμʔΛ׬૸͢Δٕज़ʯͱ͍͏ςʔϚͰൃ දΛߦ͍·ͨ͠ɻc%FWFMPQFST*0IUUQT EFWDMBTTNFUIPEKQBSUJDMFTSFQPSUEFWFMPQFSTJP CMPHHJOHDPOGFSFODFWPMUFDIOJRVFTGPS DPNQMFUJOHBOBEWFOUDBMFOEBS

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Πϕϯτ৘ใ

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5FDI8SJUFST.FFUVQ ։࠵೔࣌ɿ೥݄೔ Ր ։࠵ܗࣜɿΦϯϥΠϯ (PPHMF.FFU ओ࠵ɿ+BHV`FS5FDI8SJUFST෼Պձ ։࠵֓ཁɿ )PNF+BQBO(PPHMF$MPVE6TFSHSPVQGPS&OUFSQSJTFIUUQTKBHVFSKQ 5FDI8SJUFST෼Պձ+BQBO(PPHMF$MPVE6TFSHSPVQGPS&OUFSQSJTFIUUQTKBHVFSKQUFDI@XSJUFST

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%FWFMPQFST*0 ͷݱࡏ

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%FWFMPQFST*0ͷྺ࢙ ೥ɿΫϥεϝιουגࣜձࣾઃཱ ೥ɿ୅දऔక໾ԣా૱ɺݸਓϒϩάΛ࢝ΊΔ ޙʹ'MFYΛऔΓ্͛ɺձࣾϒϩάઃཱͷྲྀΕ΁ ೥݄ɿ͜ͷ࣌ظ·ͰձࣾϒϩάΛ༷ʑͳܗͰӡӦɺࢼߦࡨޡͷ࣌୅͕ଓ͘ ೥݄ɿ%FWFMPQFST*0ͷલ਎ϒϩάͷӡӦ͕࢝·Δ ςʔϚຖʹϒϩά΋෼͚͍ͯͨ ೥Նɿલ਎ϒϩά͕౷߹͞Εɺࠓͷ%FWFMPQFST*0ͷܗʹϦχϡʔΞϧ ೥݄ɿ௨ࢉ ຊୡ੒ ೥݄ɿ௨ࢉ ຊୡ੒ ೥݄ɿ௨ࢉ ຊୡ੒ ೥݄ɿ௨ࢉ ຊୡ੒ ೥݄ɿϒϩάࣥච؀ڥ͕8PSEQSFTT͔Β$POUFOUGVMʹ੾ΓସΘΔ ೥YY݄ɿ௨ࢉຊୡ੒ʜʁ

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%FWFMPQFST*0ͷࣥචମ੍ ɾδϣΠϯ࣌ʹϒϩάΞΧ΢ϯτΛൃߦ ΄΅શһ ɾࣥචʹ׳ΕΔ·Ͱ͸ϝϯλʔͷԼͰ࢑͘ࢦಋΛड͚Δ ɹ ࣥච͸ग़དྷΔ͕ެ։͸ग़དྷͳ͍ܗϝϯλʔ͕ެ։ ɾ׳Ε͖ͯͨΒ౤ߘެ։ݖݶΛ෇༩ ɾجຊతʹ͸ެ։ʹؔ͢Δܗࣜతͳࣾ಺ϨϏϡʔͷ࢓૊Έ͸ͳ͍ɻஶऀݸਓͷ੹೚Ͱਫ਼ࠪͷ্ެ։ ɹ ஶऀ͔ΒͷґཔͰϝϯλʔ΍༗ࣝऀʹ಺༰Λ֬ೝͯ͠΋Β͏ͱ͍ͬͨ͜ͱ͸೔ৗ஡൧ࣄ ɾجຊతʹ͸ ɹɾʰ޷͖ͳ͜ͱΛ޷͖ͳͱ͖ʹ޷͖ͳܗͰॻ͘ʱɻ ɾΫϥεϝιουͷΧϧνϟʔͷͭʹ΋ʰ৘ใൃ৴ʱ͸ܝ͛ΒΕͯ ɹ͓ΓɺΫϥεϝιουΛܗ࡞Δ΋ͷͱͯ͠ϒϩά %FWFMPQFST*0 ͸ ɹॏཁͳҐஔ෇͚ͱͳ͍ͬͯΔɻ ΫϥεϝιουͷΧϧνϟʔcձࣾ৘ใcΫϥεϝιουגࣜձࣾIUUQTDMBTTNFUIPEKQDPNQBOZDVMUVSF

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਺ࣈͰޠΔ%FWFMPQFST*0 ɾྦྷܭ౤ߘຊ਺ɿຊ ˞௚ۙաڈ೥ຊ ೥ ˠຊ ೥ ˠຊ ೥ ɾ༗ޮஶऀΞΧ΢ϯτ਺ɿ໿ ɾ೥ؒͰ࠷΋ଟ͘౤ߘ͞Εͨຊ਺ɿຊ ೥ ೔͋ͨΓຊฏۉͷܭࢉ ɾ೔Ͱ࠷΋ଟ͘౤ߘ͞Εͨຊ਺ɿຊ ೥݄೔ ɾ೥ؒͰ࠷΋ଟ͘౤ߘͨ͠ஶऀͷຊ਺ɿຊ ೥͍Θ͞ ɾ࢛൒ظͰ࠷΋ଟ͘౤ߘͨ͠ஶऀͷຊ਺ɿຊ ೥2͍Θ͞ ɾϲ݄Ͱ࠷΋ଟ͘౤ߘͨ͠ஶऀͷຊ਺ɿຊ ೥݄͠Μ΍ ɾ೔Ͱ࠷΋ଟ͘౤ߘͨ͠ஶऀͷຊ਺ɿຊ ೥݄೔ਡ๚༔ل ɾྦྷܭຊ਺ͷஶऀຖͷ෼෍ ɹɾྦྷܭຊ਺ຊҎ্ͷஶऀ਺ɿਓ ɹɾྦྷܭຊ਺ຊҎ্ͷஶऀ਺ɿਓ ɹɾྦྷܭຊ਺ຊҎ্ͷஶऀ਺ɿਓ ɹɾྦྷܭຊ਺ຊҎ্ͷஶऀ਺ɿਓ ɹɾྦྷܭຊ਺ຊҎ্ͷஶऀ਺ɿਓ ɹɾྦྷܭຊ਺ຊҎ্ͷஶऀ਺ɿਓɹ ˞਺ࣈ͸͍ͣΕ΋࣌఺

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ϒϩάΛॻ͖΍͍͢؀ڥͮ͘Γ ɾࣥචҙࢥʹ͍ͭͯ͸ա౓ʹؔ༩͠ͳ͍ ɹɾʰ޷͖ͳࣄʱΛʰ޷͖ͳ࣌ʱʹʰ޷͖ͳ಺༰ʱͰॻ͘ ɹɹɾʰ͜ΕΛॻ͖ͳ͍͞ʱͱ͍͏͜ͱ͸΄ͱΜͲͳ͍ ɹɹɾࣗ෼ͷॻ͍ͨ಺༰͸ࣗ෼Ͱ੹೚Λ࣋ͭͱ͍͏ଆ໘͕ڧ͍͔΋͠Εͳ͍ ɹɹɾࣥචςʔϚʹ೰Ήਓʹʰ͜͏͍͏ͷ͸Ͳ͏͔ͳʱͱ͍͏ఏҊ͸͋Δ ɾϒϩάࣥචʹؔ͢Δ4MBDLνϟϯωϧͷଘࡏ ɹɾࣥච಺༰ʹ͓͚Δޡࣈ୤ࣈɺ಺༰ͷνΣοΫͳͲΛಡऀ໨ઢͰదٓࢦఠ ɹɾϒϩάࣥචʹؔ͢Δ࣭໰΍೰ΈࣄͳͲ΋ؾܰʹ૬ஊՄೳ ɹɾλά΍ΧςΰϦɺΞΠΩϟονͷ࡞੒ґཔͳͲ΋ରԠ ɹɾߍӾͷଆ໘ΛҰ෦୲͍ͬͯΔͱ΋ݴ͑Δ ɾϒϩάࣥචʹؔ͢Δૢ࡞खॱ΍5JQT৘ใ౳͸దٓڞ༗ ɹɾ͓໾ཱͪ৘ใΛϒϩάͰެ։ɺڞ༗͢Δ͜ͱ΋

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࣭໰΁ͷճ౴ ˞೥݄೔࣌఺ͷ৘ใͰ͢ ˞Ҏ߱ͷ಺༰͸શͯݸਓͷॴײͰ͢

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2ٕज़ϒϩάΛਪਐ͢ΔҰ൪ͷ໨త͸ͳΜͰ͔͢ʁ lҰ൪zͱݴ͍ͭͭز͔ͭ໨త͸ز͔ͭࢥ͍ු͔ͼ·͢ ɾ৘ใͷڞ༗ ɹ ެ։ͨ͠ϒϩά͕୭͔ͷ໾ʹཱͭ ɾاۀ΍ݸਓͷϒϥϯυΛཱ֬ ɹ ΫϥεϝιουʹϒϩάͷձࣾɺಛఆαʔϏε΍෼໺ʹڧ͍ͱ͍͏Ξϐʔϧ ɾεΩϧΞοϓ ɹ ΠϯϓοτɾΞ΢τϓοτͷαΠΫϧΛճ͢͜ͱͰʹεΩϧΞοϓग़དྷΔ ɾධՁɺใु ɹ Ξ΢τϓοτ͢Δ͜ͱͰ໰͍߹Θͤ΍Ҋ݅ʹܨ͕Γɺ ɹ݁Ռͱͯࣥ͠චऀࣗ਎ͷධՁʹܨ͕Δ

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2ϊϧϚ΍ΠϯηϯςΟϒ͸ઃ͚͍ͯ·͔͢ʁ <ϊϧϚ> ɹɾzٛ຿తͳ΋ͷzͱ͍͏ҙຯ߹͍Ͱ͸جຊతʹ͸ ɹɹ શࣾڞ௨తʹ͸ ઃ͚͍ͯ·ͤΜ ɹɾ෦ॺ΍νʔϜʹΑͬͯ͸z໨ඪ஋zͱͯ͠ઃఆ͞Ε͍ͯΔ৔߹΋͋Δ໛༷ ɹɹ ৄࡉ·Ͱ͸೺Ѳ͍ͯ͠ͳ͍Ͱ͢ ɹɾʮݸਓత໨ඪʯͱͯ͠͸ਓͦΕͧΕͰཱ͍ͯͯΔײ͡ <ΠϯηϯςΟϒ> ɹɾʰYYຊॻ͍͔ͨΒӠʑʱͱ͍͏ͷ͸ͳ͍Ͱ͢ ɹɾͨͩ͠ɺձࣾͷΧϧνϟʔͱͯ͠΋ʰ৘ใൃ৴ʱͱͯ͠͸໌ه͞Ε͓ͯΓɺ ɹɹΞ΢τϓοτͷߩݙ౓߹͍ͰධՁ͞ΕΔ͜ͱ͸͋Γ·͢

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2ٕज़هࣄΛॻ͍ͯ΋Β͏ͨΊʹ΍͍ͬͯΔࢪࡦ͸͋Γ·͔͢ʁ <ษڧձͷ։࠵> ɾ਺೥͓͖ʹʰϒϩάษڧձʱΛ։࠵ ɾϒϩάࣥචͷ஌ݟΛڞ༗͢ΔػձΛઃ͚͍ͯΔ <΋͘΋͘ձͷ։࠵> ɾू·ͬͯϒϩάΛ΋͘΋͘ॻ͘ɺͨͩͦΕ͚ͩ ɾ։࠵த͸࣭ٙԠ౴΍นଧͪͳͲ΋దٓ <౤ߘσʔλͷՄࢹԽڞ༗> ɾϒϩά౤ߘσʔλΛผ్෼ੳ؀ڥʹ࿈ܞ͠ɺՄࢹԽͯ͠ఆظతʹڞ༗ ɹɾ৆ࢍ ͜Ε͚ͩॻ͍ͨʂ͜Μͳ੒Ռ͕ʂ ɹɾઞΓ ΋ͬͱօόϯόϯॻ͚ΔΑͳʁతͳ

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2ٕज़هࣄΛॻ͍ͯ΋Β͏ͨΊʹ΍͍ͬͯΔࢪࡦ͸͋Γ·͔͢ʁ <શࣾతͳϚΠϯυ> ɾࣥචҙࢥʹ͍ͭͯ͸ա౓ʹؔ༩͠ͳ͍ ɾʰ޷͖ͳࣄʱΛʰ޷͖ͳ࣌ʱʹʰ޷͖ͳ಺༰ʱͰॻ͘ ɾࣗ෼ͷॻ͍ͨ಺༰͸ࣗ෼Ͱ੹೚Λ࣋ͭͱ͍͏ଆ໘͕ڧ͍͔΋͠Εͳ͍ ɾࣥචςʔϚʹ೰Ήਓʹʰ͜͏͍͏ͷ͸Ͳ͏͔ͳʱͱ͍͏ఏҊ͸͋Δ <4MBDLνϟϯωϧͰͷ৘ใɾ೰Έڞ༗> ɾϒϩάࣥචʹؔ͢Δ࣭໰΍೰ΈࣄͳͲ΋ؾܰʹ૬ஊՄೳ ɾ౤ߘ͞ΕͨهࣄͷνΣοΫػߏͷ໾ׂ΋Ռ͍ͨͯ͠Δ ɾ͓໾ཱͪ৘ใΛϒϩάͰެ։ɺڞ༗͢Δ͜ͱ΋͋Δ

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2ϨϏϡʔ νΣοΫ ମ੍ͳͲܾ·Γ͝ͱ͸͋Γ·͔͢ʁ ɾݫີʹ಺༰ΛνΣοΫ͢Δ࢓૊Έɺػߏతͳ΋ͷ͸ଘࡏ͠ͳ͍ ɾ͋͘·Ͱ౤ߘऀࣗ਎͕੹೚Λ࣋ͬͯ಺༰Λਫ਼ࠪ֬ೝͷ্ެ։ɺ͕جຊϧʔϧ ɾࣥචʹؔ͢ΔΨΠυϥΠϯ͸༻ҙɺల։ ɾஶऀͷεςʔλεʹԠͯ͡ରԠ͸গʑҟͳΔ ɹɾΫϥεϝιουʹ৽͘͠ՃΘͬͨϝϯόʔͷ৔߹ ɹɹɾҰఆظؒʰϝϯλʔʱͷԼͰࣥච׆ಈΛ։࢝ ɹɹɾهࣄ࡞੒͸ग़དྷΔ͕౤ߘެ։͸ग़དྷͳ͍ݖݶ ɹɹɾϝϯλʔ͕ঢ়گΛ൑அ͠0,͕ग़Ε͹౤ߘݖݶ෇༩ɺࣗ෼Ͱ౤ߘग़དྷΔܗʹ ɹɾҰൠ౤ߘऀͷ৔߹ ɹɹɾࣗΒͷ൑அͰهࣄ಺༰Λਫ਼ࠪɺެ։ ɹɹɾެ։લʹϨϏϡʔґཔ͸໪࿦Մೳ ํ๏͸༷ʑ ɹɹɾ߹Θͤͯɺ౤ߘͨ͠هࣄʹ͍ͭͯ͸ஶऀ͕ʰಡऀࢹ఺ʱͰదٓߦ͓ͬͯΓɺ ɹɹɹϑΟʔυόοΫ΋ߦΘΕ͍ͯΔ

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2l͜Ε͸΍Βͳ͖ΌΑ͔ͬͨzࣦഊஊΛڭ͍͑ͯͩ͘͞ʂ ɾϒϩάࣥචΛzڧ͍ͨz͜ͱ͕͋ͬͨ ɹɾશһ͕શһzॻ͚ΔzΘ͚Ͱ΋ɺzॻ͖͍ͨzΘ͚Ͱ΋ͳ͍

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