抽象化という思考のツール - 開発現場での活用 - / Abstraction-as-a-Tool-for-Thinking-in-dev

ந৅Խͱ͍͏ࢥߟͷπʔϧ ։ൃݱ৔Ͱͷ׆༻ 1)1ΧϯϑΝϨϯεؔ੢ΞϑλʔύʔςΟʔJOεϚϨδ !TIJOY

D .BTBTIJ4IJOCBSB!TIJOY !TIJOY ৽ݪʢ͠Μ͹Βʣխ࢘ େࡕͰ8FCγεςϜ։ൃ΍ٕज़αϙʔτΛߦ͍ͬͯ·͢ɻ wCMPH IUUQTCMPHTIJOYDPN w1PEDBTU1)1ͷݱ৔ IUUQTQIQHFOCBTIJOYDPN

D .BTBTIJ4IJOCBSB!TIJOY ͸͡Ίʹ 👉͜ͷࢿྉ͸ެ։͠·͢ɻ 👉ந৅Խʹؔ͢ΔࢲͳΓͷߟ͑ํΛ͝঺հ͠·͢ɻ ͜͏͍͏ߟ͑ํ΋͋Δͷͩͳͱฉ͍͍ͯͩ͘͞ɻ 👉ײ૝ɺϑΟʔυόοΫ͓଴͍ͪͯ͠·͢ʂ 9Ͱ΋ɺ࠙਌ձͰ΋ʂ ͸͡Ίʹ

D .BTBTIJ4IJOCBSB!TIJOY "HFOEB w ந৅Խͱ͸ w ׆༻શମ૾ΛݟΔ w ׆༻)PX͔Β8IBU8IZ w
׆༻ίʔυͷந৅౓Λἧ͑Δ

D .BTBTIJ4IJOCBSB!TIJOY IUUQTTQFBLFSEFDLDPNTIJOYBCTUSBDUJPOBTBUPPMGPSUIJOLJOH

D .BTBTIJ4IJOCBSB!TIJOY ந৅Խͱ͸

D .BTBTIJ4IJOCBSB!TIJOY ந৅Խͱ͸ w ந৅ ந৅ԽͰ࡞ΒΕͨ֓೦ʢந৅Խͱ͍͏ߦҝʹ࢖͏έʔε΋͋Δʣ w ࣺ৅ ର৅͔ΒෆཁͳཁૉΛࣺͯΔ͜ͱɺࣺͯͨ΋ͷ ର৅ʢ۩ମʣ͔Βຊ࣭తʹॏཁͳཁૉΛऔΓग़ͯ͠
Ұͭͷ֓೦ͱͯ͠ఆٛ͢Δ͜ͱ

D .BTBTIJ4IJOCBSB!TIJOY ந৅Խྫ TIJOY w ࢯ໊ w ੜ೥݄೔ʢ೥ྸʣ w ݂ӷܕ
w ॅॴ w ϝʔϧΞυϨε w ࡕਆϑΝϯ w ສതճߦͬͨ w ͳͲ

w ॅॴ w ϝʔϧΞυϨε w ࡕਆϑΝϯ w ສതճߦͬͨ w ͳͲ จ຺ษڧձࢀՃ จ຺ʹଈͨ͠ந৅ w DPOQBTTϢʔβ໊ w ϝʔϧΞυϨε

w ॅॴ w ϝʔϧΞυϨε w ࡕਆϑΝϯ w ສതճߦͬͨ w ͳͲ จ຺ݙ݂ w ࢯ໊ w ݂ӷܕ w ݙ݂ཤྺ w ମॏ w ମԹ w ͳͲ จ຺ʹଈͨ͠ந৅

D .BTBTIJ4IJOCBSB!TIJOY ந৅ԽͷϝϦοτ w ຊ࣭తʢจ຺ʹదͨ͠ʣͳ৘ใͷΈʹूதͰ͖Δɻ w ৘ใΛݮΒͤΔͷͰɺཧղ͠΍͘͢ͳΔɻ w จ຺ʹదͨ͠۩ମΛݟ͚ͭ΍͘͢ͳΔɻ

D .BTBTIJ4IJOCBSB!TIJOY ந৅౓ʢந৅Ϩϕϧʣ w ந৅౓ந৅ͷ౓߹͍Λࣔ͢΋ͷɻ ந৅౓͕ߴ͍ΑΓߴ࣍ͷந৅ w ந৅౓ʹ΋จ຺ʢ࣠ʣ͕͋Δɻ w ந৅ͱ۩ମ͸૬ରతɻ
͋Δந৅͸ΑΓߴ࣍ͷந৅͔Β͸۩ମ w ந৅౓͕ἧ͍ͬͯΔɺฒΜͰ͍Δͱཧղ͠΍͍͢ɻ

D .BTBTIJ4IJOCBSB!TIJOY ந৅౓ྫษڧձࢀՃจ຺ εϚϨδษڧձࢀՃऀ ษڧձࢀՃऀ ந৅౓͕ߴ͍ ʢந৅తʣ ந৅౓͕௿͍ ʢ۩ମతʣ TIJOY

D .BTBTIJ4IJOCBSB!TIJOY ந৅౓ྫݙ݂จ຺ N-ݙ݂ऀ ݙ݂ऀ ந৅౓͕ߴ͍ ʢந৅తʣ ந৅౓͕௿͍ ʢ۩ମతʣ TIJOY

D .BTBTIJ4IJOCBSB!TIJOY ந৅౓ྫϘϥϯςΟΞจ຺ N-ݙ݂ऀ ݙ݂ऀ ந৅౓͕ߴ͍ ʢந৅తʣ ந৅౓͕௿͍ ʢ۩ମతʣ TIJOY
ϘϥϯςΟΞ ৽ͨͳࢹ఺

D .BTBTIJ4IJOCBSB!TIJOY ׆༻શମ૾ʢ஍ਤʣΛ࡞Δ

D .BTBTIJ4IJOCBSB!TIJOY શମ૾ͱ͍͏ந৅ w ͋Δ෺ࣄͷશମతͳΠϝʔδΛࣔͨ͠΋ͷɻ w ཁૉΛจ຺ʹԠͯ͡ந৅Խͯ͠഑ஔ͢Δͷ͕ॏཁɻ w ඞཁͳ৘ใʹߜΔͷͰશମΛཧղ͠΍͍͢ɻ w
ࢥߟͷ஍ਤʹͳΔʢ၆ᛌͰ͖Δʣɻ

D .BTBTIJ4IJOCBSB!TIJOY શମ૾ྫγεςϜߏ੒ਤ $%/ -# 8FCαʔό OHJOY QIQGQN 8FCαʔό OHJOY
QIQGQN %#

D .BTBTIJ4IJOCBSB!TIJOY શମ૾ྫද 42-จ ΫΤϦϏϧμʔ "DUJWF3FDPSE ίʔυྔ ଟ͍ தؒ গͳ͍
ࣗ༝౓ ߴ͍ தؒ ௿͍ ηΩϡϦςΟ ஫ҙ͕ඞཁ தؒ ߴ͍

D .BTBTIJ4IJOCBSB!TIJOY શମ૾Λ࡞Δ w ·ͣ͸࠷ॳ͔Β࠷ޙ·ͰͷྲྀΕΛߥ͘ॻ͍ͯΈΔ w ෼͔Βͳ͍ͱ͜Ζ͸ɺฉ͘PSௐ΂Δ w νʔϜͰҰॹʹ࡞ͬͯΈΔʢϫʔΫγϣοϓʣ

D .BTBTIJ4IJOCBSB!TIJOY FYγεςϜશମ૾ ؅ཧγεςϜ ঎඼ొ࿥ ൃૹॲཧ ߪೖϢʔβ "ࣾ୲౰ &$αΠτ ঎඼ߪೖ
%#

D .BTBTIJ4IJOCBSB!TIJOY ׆༻)PX͔Β8IBU8IZ

D .BTBTIJ4IJOCBSB!TIJOY )PX͸۩ମɺ8IBU8IZ͸ந৅ w )PXΛந৅Խͯ͠8IBU8IZΛ஌ΔɺݟΔɻ w )PX͕ଥ౰͔͸8IBU8IZʹΑͬͯมΘΔɻ w ຊ࣭Λ஌Δ͜ͱͰΑΓޮՌతͳ)PXΛબ΂Δɻ

D .BTBTIJ4IJOCBSB!TIJOY )PX͔Β8IBU8IZྫ )PX1)1ίʔυΛ଎͘͢Δ

D .BTBTIJ4IJOCBSB!TIJOY )PX͔Β8IBU8IZྫ )PX1)1ίʔυΛ଎͘͢Δ 8IBUγεςϜΛ଎͘͢Δ

D .BTBTIJ4IJOCBSB!TIJOY )PX͔Β8IBU8IZྫ 8IBUγεςϜΛ଎͘͢Δ )PX$%/ͰΩϟογϡ͢Δ )PX%#ΫΤϦΛվળ͢Δ )PX1)1ίʔυΛ଎͘͢Δ

D .BTBTIJ4IJOCBSB!TIJOY )PX͔Β8IBU8IZྫ )PX8IBUγεςϜΛ଎͘͢Δ )PX$%/ͰΩϟογϡ͢Δ )PX%#ΫΤϦΛվળ͢Δ )PX1)1ίʔυΛ଎͘͢Δ 8IZγεςϜ͕஗͘ͳ͖ͬͯͨͨΊʹམͪͨ࡞ۀޮ཰Λվળ͍ͨ͠ɻ

D .BTBTIJ4IJOCBSB!TIJOY )PX8IBU͸૬ରత w ͋Δ)PXʹର͢Δ8IBU͸ɺ্Ґͷ)PXʹͳΔɻ w )PX΋ԼҐʹର͢Δ8IBUʹͳΓಘΔɻ w )PXPS8IBUΑΓந৅౓Λม͑ͯཧղΛਂΊΔɺ޿͛ Δ͜ͱ͕େࣄɻ

D .BTBTIJ4IJOCBSB!TIJOY ׆༻ந৅౓Λἧ͑Δ

D .BTBTIJ4IJOCBSB!TIJOY ίʔυʹ͓͚Δந৅౓ w ॲཧର৅ͷந৅౓ʢ๯಄ࢿྉࢀরʣ ίϯϐϡʔλจ຺ͰߴϨΠϠந৅౓͕ߴ͍4-"1 w ࣮૷ཻ౓ʹΑΔந৅౓ ࣮૷ཻ౓͕ߥ͍ந৅౓͕ߴ͍$PNQPTFE.FUIPE

D .BTBTIJ4IJOCBSB!TIJOY ࣮૷ཻ౓ͷந৅౓Λ੔ཧ͢Δ w ந৅౓͕ߴ͍ίʔυ͸શମΛཧղ͠΍͍͢ɻ w ந৅౓͕௿͍ίʔυ͸࣮ࡍͷڍಈ͕ཧղ͠΍͍͢ɻ w QVCMJDϝιου΍ෳࡶͳϝιου͸ந৅౓Λ্͛Δɻ w
QSJWBUFϝιου͸ந৅౓ΛԼ͛Δɻ

D .BTBTIJ4IJOCBSB!TIJOY $PNQPTFE.FUIPE w ϝιουίʔυͷந৅౓ʢৄࡉ౓ʣΛ੔ཧ͢Δύλʔϯɻ w QVCMJDϝιου͸࣮ߦखॱͷΈΛॻ͘ɻ w QSJWBUFϝιουʹॲཧৄࡉΛॻ͘ɻ w
݁ՌɺQVCMJDϝιου͸QSJWBUFϝιουͷݺͼग़͠ ͷΈʹͳΔɻ

࣮૷ཻ౓ͷந৅౓͕௿͍ public function register(Request $request) { $errors = []; if
(!$request->input('name')) { $errors['name'] = '໊લ͸ඞਢͰ͢'; } // snip if (!empty($errors)) { return response()->json(['errors' => $errors], 422); } $userId = DB::table('users')->insertGetId([ 'name' => $request->input('name'), 'email' => $email, // snip ]); return response()->json([ 'message' => 'ొ࿥͕׬ྃ͠·ͨ͠', 'userId' => $userId, ], 201); } ༷ʑͳίʔυ͕͍ࠞͬͯͯ͡ ཧղͮ͠Β͍

✅࣮૷ཻ౓ͷந৅౓͕ߴ͍ public function register(Request $request) { $errors = $this->validateRegistration($request); if
(!empty($errors)) { return $this->validationErrorResponse($errors); } $userId = $this->createUser($request); return $this->registrationSuccessResponse($userId); } QSJWBUFϝιουݺͼग़͠ͷΈͰॲཧϑϩʔΛهड़ શମͷॲཧͷྲྀΕ͕෼͔Γ΍͍͢ɻ ʢผΫϥεʹ࣮૷͢Δͷ΋0,ʣ

✅ந৅౓ͷ௿͍ίʔυ͸֤ϝιουʹ෼ׂ private function validateRegistration(Request $request): array { // όϦΤʔγϣϯ }
private function validationErrorResponse(array $errors): Response { // όϦσʔγϣϯΤϥʔϨεϙϯεੜ੒ } private function createUser(Request $request): int { // Ϣʔβอଘ } private function registrationSuccessResponse(int $userId): Response { // ਖ਼ৗϨεϙϯεੜ੒ } ॲཧର৅͕ϝιου͝ͱʹ ෼ׂ͞Ε͍ͯΔͷͰཧղ͠΍͍͢

D .BTBTIJ4IJOCBSB!TIJOY $MBVEF$PEFͰந৅౓Λ੔ཧ w ʮ ⚪︎⚪︎ ϝιουͷந৅౓Λἧ͑ͯʯ w ந৅౓ͷ௿͍ίʔυΛผϝιουʹ෼ׂͯ͘͠ΕΔɻ w
ର৅ϝιου͸ந৅౓ͷߴ͍࣮૷ʹͳΔɻ w ίʔυΛཧղ͢ΔͨΊͷϦϑΝΫλϦϯάʹศརɻ

D .BTBTIJ4IJOCBSB!TIJOY ·ͱΊ

D .BTBTIJ4IJOCBSB!TIJOY ·ͱΊ w ந৅Խ͸਎ۙͳࢥߟπʔϧ w ந৅ͰશମΛཧղ͢Δ w ҙࣝͯ͠ந৅౓ΛมԽͤͯ͞ݟํΛม͑Δ

D .BTBTIJ4IJOCBSB!TIJOY ࢀߟ w ந৅Խ IUUQTLPUPCBOLKQXPSE &"#%&#"&$ w ۩ମͱந৅ IUUQTXXXBNB[PODPKQEQ#-65/*
w ϓϩμΫςΟϒɾϓϩάϥϚ IUUQTXXXPSFJMMZDPKQCPPLT

抽象化という思考のツール - 開発現場での活用 - / Abstraction-as-a-To...

抽象化という思考のツール - 開発現場での活用 - / Abstraction-as-a-Tool-for-Thinking-in-dev

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