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抽象化って何? (What is abstraction?)
hidenorigoto
February 16, 2019
Programming
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3.4k
抽象化って何? (What is abstraction?)
2019年2月16日 Laravel JP Conference
hidenorigoto
February 16, 2019
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Transcript
நԽͬͯԿʁ ޙ౻लએ IJEFOPSJHPUP!HNBJMDPN -BSBWFM+1$POGFSFODF 8IBUJTBCTUSBDUJPO
நԽ "CTUSBDUJPO
͜ͷτʔΫͷඪ
͜ͷτʔΫͷඪ w ݱ࣮ੈքʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱͳͷ͔ɺ ཧղ͢Δ
͜ͷτʔΫͷඪ w ݱ࣮ੈքʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱͳͷ͔ɺ ཧղ͢Δ w ϓϩάϥϛϯάʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱ ͳͷ͔ɺཧղ͢Δ
͜ͷτʔΫͷඪ w ݱ࣮ੈքʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱͳͷ͔ɺ ཧղ͢Δ w ϓϩάϥϛϯάʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱ ͳͷ͔ɺཧղ͢Δ w நԽͷࢦΛΓɺநԽͷྑ͠ѱ͠ΛஅͰ͖ ΔΑ͏ʹͳΔ
͓આ໌
γνϡΤʔγϣϯ w ʮಠʢφϯϓϨɺ/VNCFS1MBDFʣʯͷΞϓϦΛ։ ൃ͢Δ
ಠʢφϯϓϨʣͱʁ
ಠʢφϯϓϨʣͱʁ ݸͷϚεʹ͓͍ͯɺ ̍ʙ̕ͷࣈ͕ ॏෳ͍ͯ͠ͳ͍͜ͱ
γνϡΤʔγϣϯ w ʮಠʢφϯϓϨɺ/VNCFS1MBDFʣʯͷΞϓϦΛ։ൃ ͢Δ w ಠͷʮਖ਼ղνΣοΫػೳʯͷ࣮Λ୲͢Δ w ϧʔϧΛຬ͍ͨͯ͠Δ͔Ͳ͏͔ʁ w લఏ
w ಠͷͯ͢ͷϚεʹࣈ͕ೖ͍ͬͯΔ w ̍ʙ̕ͷࣈҎ֎ͷೖྗͳ͍
࠷ॳͷίʔυ֓ཁ ಠͷϚεͷใΛ ̎࣍ݩྻͰอ࣋ ਖ਼ղ͔Ͳ͏͔Λ νΣοΫ͢Δ
None
None
B<J><K> Jଆ͕ߦ Kଆ͕ྻ
None
None
վળϙΠϯτͳ͍͔ʁ w ϩδοΫͰ͖͍ͯΔɻਖ਼͘͠νΣοΫͰ͖Δɻ w ίʔυΛཧͰ͖Δؾ͕͢Δɻ͔͠͠ɺͲΜͳΞϓ ϩʔνͰΔͷ͔ʁ w $IFDLFS͕.BUSJYʹґଘ͍ͯ͠Δͱ͜Ζ͔Βʁ
ґଘͱ͍͑ɾɾɾ ґଘؔٯసͷݪଇʢ%*1ʣ ͬͯϠπΛ͏ͷ͔ͳɾɾɾ ্ҐϨϕϧͷϞδϡʔϧԼҐϨϕϧͷϞδϡʔ ϧʹґଘ͖͢Ͱͳ͍ɻ྆ํͱந ʢBCTUSBDUJPOT ʹґଘ͖͢Ͱ͋Δɻ
ґଘؔٯసͷݪଇͬͯɺ ؒʹJOUFSGBDFΛ͞Ήܗʹ ͢Εྑ͍ΜͩΑͳɻ ˞ҙɿԋग़ͷ߹্ͷɺۃͳཧղྫͰ͢
ґଘؔٯసʂґଘͯ͠·ͤΜʂ
Կ͔ؒҧ͍ͬͯΔ ؾ͕͢Δ
Ͳ͕ؒ͜ҧ͍ͬͯΔͷ͔ આ໌͍ͯͩ͘͠͞ʂ
Ͳ͕ؒ͜ҧ͍ͬͯΔͷ͔ʁ
நԽͱ
ࣙॻతఆٛ நʢͪΎ͏͠ΐ͏ʣ ࣄදΛɺ͋Δੑ࣭ɾ ڞ௨ੑɾຊ࣭ʹண͠ɺ ͦΕΛந͖ग़ͯ͠Ѳ͢Δ ͜ͱɻ ࣺʢ͠Ό͠ΐ͏ʣ ֓೦Λந͢Δࡍʹɺந ͞ΕͨॾදҎ֎ͷද Λߟͷର͔ΒΓ
ࣺͯΔ͜ͱɻ
4ɾ*ɾϋϠΧϫʮநͷϋγΰʯ ʰࢥߟͱߦಈʹ͓͚ΔݴޠʱQ ܦݧͷରʢ໒ڇʣ Պֶతঢ়ଶʢ໒ڇʣ ϕογʔ ޠʮ໒ڇʯ Ոச ࢿ࢈ ࢿ࢈
ݴޠ நԽ நԽ நԽ
நԽʹ͓͚ΔมԽ ϕογʔ ޠʮ໒ڇʯ நԽ ಛͷྔ ଟ͍ গͳ͍ ରͷ
গͳ͍ ଟ͍
நϨϕϧ͕͓͔͍͠จ ܦݧͷରʢ໒ڇʣ Պֶతঢ়ଶʢ໒ڇʣ ϕογʔ ޠʮ໒ڇʯ Ոச ࢿ࢈ ࢿ࢈
ࢲ໌ͷேɺࢲୡͷࢿ࢈ʹ 㕒Λ༩͑ͳ͚Ε͍͚ͳ͍ ࢿ࢈ 㕒 ผͷநϨϕ ϧ͕ࠞࡏͯ͠ ͍Δʂ
நԽͷ·ͱΊ w நʹϨϕϧ͕͋Δʢநͷϋγΰʣ w ϋγΰΛ্ΔʹɺಛΛΓࣺͯͯநԽ͢Δ ಛྔݮΔ͕ɺΑΓଟ͕͘ରʹೖΔ w நͷϨϕϧ͕ἧ͍ͬͯͳ͍ͱɺίϛϡχέʔγϣ ϯͰ͖ͳ͍
ϓϩάϥϛϯάʹ͓͚Δ நԽͱ
ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք
ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք ࢿ࢈ 㕒 ͓ۚ ϕογʔ
ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք ࢿ࢈ 㕒 ͓ۚ ϕογʔ ࠃޠɺߏจɺޠኮ ಓ ۩
ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք ࢿ࢈ 㕒 ͓ۚ ϕογʔ .BUSJY νΣοΫ Ϛε ϧʔϧ ࠃޠɺߏจɺޠኮ
ಓ ۩
ݱ࣮ੈքɺϓϩάϥϛϯάͷੈք ࢿ࢈ 㕒 ͓ۚ ϕογʔ .BUSJY νΣοΫ Ϛε ϧʔϧ ࠃޠɺߏจɺޠኮ
ϓϩάϥϛϯάݴޠɺߏจɺޠኮ ಓ ۩
ϓϩάϥϛϯάʹ͓͚ΔநԽͱ ѻ͍ͬͯΔ֓೦ͷநԽ *OUFSGBDF"CTUSBDUDMBTTΛ͏͜ͱ ͜ΕΛୡ͢ΔͨΊʹɺݴޠʹ༻ҙ͞Ε͍ͯΔ༷ʑͳ ػೳΛ͏ʢ*OUFSGBDFɺ"CTUSBDUɺFUDʣ
ࢦʁ
ϓϩάϥϛϯάʹ͓͚ΔͷநԽͷࢦ Ծ దͳ໋໊ ໊લͱ༰͕Ұக͠ ͍ͯΔ͜ͱ நͷ౷Ұ ͋Δଆ໘͕औΓग़͞ Εͨͷ͚ͩͰ⁋᧒ ͕߹͏͜ͱ ڱ͍ൣғ
ߟྀ͢Δಛͷ͕ খ͘͞ͳ͍ͬͯΔ͜ ͱ ˞ҙɿIJEFOPSJHPUPʹΑΔࡶͳఏҊͰ͢
͜ͷநԽԿ͕ؒҧ͍ͬͯͨʁ
͜ͷநԽԿ͕ؒҧ͍ͬͯͨʁ దͳ໋໊
͜ͷநԽԿ͕ؒҧ͍ͬͯͨʁ நͷ౷Ұ
͜ͷநԽԿ͕ؒҧ͍ͬͯͨʁ ڱ͍ൣғ
͜ͷநԽԿ͕ؒҧ͍ͬͯͨʁ ڱ͍ൣғ ଞʹϝιου͕͋Δ ͚̍ͭͩ
͜ͷநԽԿ͕ؒҧ͍ͬͯͨʁ ڱ͍ൣғ
վળྫ
ґଘؔͷຊ࣭ΛݟۃΊΔ
ґଘؔͷຊ࣭ΛݟۃΊΔ w $IFDLFSͱ.BUSJYͷຊ࣭తͳؔɺׂΛߟ͑Δ $IFDLFSɺ࠷ݶԿ͕͋ΕΛՌͨͤΔ͔
ґଘؔͷຊ࣭ΛݟۃΊΔ w $IFDLFSͱ.BUSJYͷຊ࣭తͳؔɺׂΛߟ͑Δ $IFDLFSɺ࠷ݶԿ͕͋ΕΛՌͨͤΔ͔ w $IFDLFSɺݸͷࣈΛड͚औΕɺͦΕ͕0,͔/( ͔ΛఆͰ͖Δ
ґଘؔͷຊ࣭ΛݟۃΊΔ w $IFDLFSͱ.BUSJYͷຊ࣭తͳؔɺׂΛߟ͑Δ $IFDLFSɺ࠷ݶԿ͕͋ΕΛՌͨͤΔ͔ w $IFDLFSɺݸͷࣈΛड͚औΕɺͦΕ͕0,͔/( ͔ΛఆͰ͖Δ w ݸͷࣈͷஔɺఆʹ͕ؔͳ͍
$IFDLFSࣈͷྻ͚ͩΛѻ͏
ࣈͷྻͷੜΞμϓλʔͰٵऩ͢Δ
None
None
None
վળલͷ$IFDLFSͱൺֱ
ڱ͍ൣғநԽ ந౷Ұ .BUSJYΛѻ͏ $IFDLFS /VNCFS$PMMFDUJPO Λѻ͏$IFDLFS .BUSJYશମ ࣈͷྻ
6.- $IFDLFS.BUSJY͔ΒΓ͞Εͨ
நԽͷԸܙ w $IFDLFSΫϥεͷίʔυ͕ݮͬͨ w $IFDLFSΫϥεͷґଘର͕খ͘͞ͳͬͨ
·ͱΊ
͜ͷτʔΫͷඪ
͜ͷτʔΫͷඪ w ݱ࣮ੈքʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱͳͷ͔ɺ ཧղ͢Δ
͜ͷτʔΫͷඪ w ݱ࣮ੈքʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱͳͷ͔ɺ ཧղ͢Δ w ϓϩάϥϛϯάʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱ ͳͷ͔ɺཧղ͢Δ
͜ͷτʔΫͷඪ w ݱ࣮ੈքʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱͳͷ͔ɺ ཧղ͢Δ w ϓϩάϥϛϯάʹ͓͚ΔநԽͱͲͷΑ͏ͳ͜ͱ ͳͷ͔ɺཧղ͢Δ w நԽͷࢦΛΓɺநԽͷྑ͠ѱ͠ΛஅͰ͖ ΔΑ͏ʹͳΔ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
ࢀߟ w 4ɾ*ɾϋϠΧϫʰࢥߟͱߦಈʹ͓͚Δݴޠʱݪॻୈ ࢛൛ؠॻళ