フレームワークで見るObserverパターン #PHPerKaigi 2022

by asumikam

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ϑϨʔϜϫʔΫͰݟΔ 0CTFSWFSύλʔϯ

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͜Μʹͪ͸ʂ w ͋͢Έ 🐤!BTVNJLBN w খాݪʹ͋Δ)BNFF ϋϛΟ גࣜձࣾʹۈΊਃ͢ w 8FCΞϓϦ։ൃ🙋 w ύϯϑϨοτΈͨʙʙʂʁΈͯʙʙʙʂʂ

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0CTFSWFSύλʔϯΛҙࣝ͠ͳ͕Β ϑϨʔϜϫʔΫͷػೳΛ טΈకΊͯΈͨΑʂ ࠓ೔ͷൃදͷϙΠϯτ

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͓͠ͳ͕͖ w 0CTFSWFSύλʔϯ w ֓ཁ w ࣮૷ྫ w ϑϨʔϜϫʔΫͰݟΔ0CTFSWFSύλʔϯ w $BLF1)1 w -BSBWFM w ݟൺ΂ͯΈΔ·ͱΊ

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0CTFSWFSύλʔϯ

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0CTFSWFSύλʔϯͱ͸ 0CTFSWFSύλʔϯͱ͸ w ఆٛ w ͋ΔΦϒδΣΫτʢ؂ࢹ͞ΕΔऀʣͷঢ়ଶ͕มԽͨ͠ࡍɺ   ͦΕʹґଘ͢Δ͢΂ͯͷΦϒδΣΫτʢ؂ࢹऀʮ0CTFSWFSʯʣʹର͠ ͯࣗಈతʹ௨஌ɺߋ৽͕ߦΘΕΔΑ͏ʹ͢Δ

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ྫͰݟ͍ͯ͘ʂ 0CTFSWFSύλʔϯͱ͸ w ʮ৽نϢʔβͷొ࿥ʯΛྫʹ0CTFSWFSύλʔϯΛ࣮૷ͯ͠ΈΔ🍃 w จ຺ʹΑͬͯέʔεόΠέʔε w ͜Ε͕ৗʹϕετʂͱ͍͏ൃ৴Ͱ͸ͳ͍ɾɾɾʂ🐱

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ྫʮ৽نϢʔβͷొ࿥ʯ 0CTFSWFSύλʔϯͱ͸ྫ ৽نొ࿥ͷ͋ͱʹ ʮѫࡰϝʔϧͷૹ৴ʯ ʮ͔·΅͜ϝΠπ͔Ͳ͏͔֬ೝʯ ͯ͠ཉ͍͠ʂ ˞͔·΅͜ϝΠπɾɾɾ খాݪࡏॅͰ͋Δ͜ͱ

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Ͳ͏΍࣮ͬͯ૷͠Α͏ɺɺ🤔 0CTFSWFSύλʔϯͱ͸ྫ w ௥Ճཁٻ w ѫࡰϝʔϧͷૹ৴ w ͔·΅͜ϝΠπ͔ͷ֬ೝ w .PEFMʹهड़ʁ w จ຺ʹؔ܎ͷͳ͍ॲཧ͕ೖΓࠐΜͰ͠·͏ w $POUSPMMFSʹهड़ʁ w ʮ.PEFMͷঢ়ଶͷมԽʯΛ஌Δߏ଄ʹͳΔ

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0CTFSWFSύλʔϯͷద༻ 0CTFSWFSύλʔϯͱ͸0CTFSWFSύλʔϯͷద༻ w .PEFMΛʮ؂ࢹ͞ΕΔऀʯʹ͢Δ w 0CTFSWFSΛ࡞Δʢ࣮ࡍͷॲཧʣ w 0CTFSWFSͷొ࿥ൃՐͷهड़

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.PEFMΛʮ؂ࢹ͞ΕΔऀʯʹ͢Δ 0CTFSWFSύλʔϯͱ͸0CTFSWFSύλʔϯͷద༻ w ҎԼΛهड़ w 0CTFSWFSΛొ࿥͢Δ࢓૊Έ w 0CTFSWFSΛൃՐ͢Δ࢓૊Έ w ࠓճ͸ຊʹ฿ͬͯJOUFSGBDFΛ࢖࣮ͬͯ૷

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0CTFSWFSΛ࡞Δʢ࣮ࡍͷॲཧʣ 0CTFSWFSύλʔϯͱ͸0CTFSWFSύλʔϯͷద༻ w 0CTFSWFS w FYFDͱ͍͏ϝιουΛ࣮૷ͤ͞Δ w 8FMDPNF-FUUFS ,BNBCPLP.BUFT$IFDLFS w FYFDͷ࣮૷

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0CTFSWFSΛొ࿥ൃՐ͢Δ 0CTFSWFSύλʔϯͱ͸0CTFSWFSύλʔϯͷద༻

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0CTFSWFSύλʔϯΛద༻ͨ͜͠ͱͰ 0CTFSWFSύλʔϯͱ͸0CTFSWFSύλʔϯͷద༻ w ໾ׂͷ෼཭͕Ͱ͖ͨ💘 w ৽ͨͳཁٻ͕དྷͨ࣌΋҆৺💘 w ͋͢ΈΊ΋   ʮ؂ࢹऀʹ௨஌ʯ͸͍ͯ͠Δײ͡🤔   ͕͜͜1VC4VCύλʔϯͱͷҧ͍ͩͳΜ🙆✨

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ϑϨʔϜϫʔΫͰݟΔ   0CTFSWFSύλʔϯ

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ϑϨʔϜϫʔΫͰݟΔ0CTFSWFSύλʔϯ ϑϨʔϜϫʔΫͰݟΔ0CTFSWFSύλʔϯ w .PEFMͷॲཧʹ߹ΘͤͯԿ͔͠ΒͷΠϕϯτൃՐɺɺɺ w ࠓ·ͰͰܦݧ͔ͨ͠΋ʂʂ🤔 w 0CTFSWFSύλʔϯͰ͖ͪΜͱͳͧΓͳ͕Βཧղ͍ͨ͠ʂ w ઌఔͷྫΛ༻͍ͭͭϑϨʔϜϫʔΫΛݟ͍ͯ͘ʂ

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯ $BLF1)1ͰݟΔ0CTFSWFSύλʔϯ w ίʔϧόοΫͷϥΠϑαΠΫϧ w ΠϕϯτγεςϜ

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ίʔϧόοΫͷϥΠϑαΠΫϧ🔮 $BLF1)1ͰݟΔ0CTFSWFSύλʔϯίʔϧόοΫͷϥΠϑαΠΫϧ w 5BCMF͕نఆͷΠϕϯτΛ༻ҙ IUUQTCPPLDBLFQIQPSHKBPSNUBCMFPCKFDUTIUNMUBCMFDBMMCBDLT ˝͜ͷهड़͚ͩͰɺউखʹTBWFͷޙʹݺΜͰ͘ΕΔɾɾɾʂ

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ࠓ͔Βͷ͋Β͢͡ $BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ w ϑϨʔϜϫʔΫଆͰ༧Ί&WFOUʢ0CTFSWFSʣΛ   ొ࿥ͯ͠ൃՐ͍ͤͯ͞Δ🙆 w ͦͷΠϕϯτ͸Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ w ͦͷΠϕϯτ͸Ͳ͏΍ͬͯൃՐ͍ͯ͠Δʁ

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ࠓ͔Βͷ͋Β͢͡ $BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ w ొ৔ਓ෺ w 5BCMFʢ؂ࢹ͞ΕΔऀʣ w &WFOUʢ࣮ࡍͷॲཧʣ w &WFOU.BOBHFSʢ؂ࢹ͢Δऀʣ w &WFOU%JTQBUDIFS5SBJUͰ؅ཧ͞Ε͍ͯΔ

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Πϕϯτ͸Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ $BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ w 6TFST5BCMF͕Ҿ਺

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ w &WFOU.BOBHFS@BUUBDI4VCTDSJCFS w 5BCMFʹ࣮૷͞Ε͍ͯΔ JNQMFNFOUFE&WFOUTΛ͙Δ͙Δ🌀 w &WFOU-JTUFOFS*OUFSGBDFͷ࣮૷ Πϕϯτ͸Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ Πϕϯτ͸Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ Πϕϯτ͸Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ Πϕϯτ͸Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ Πϕϯτ͸Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ w ·ͱΊΔͱɺɺ w 6TFST5BCMF͕ΠϯελϯεԽ͞Εͨ࣌఺Ͱ w &WFOU.BOBHFS͕ࣗ਎ͷϓϩύςΟ@MJTUFOFSʹ w BGUFS4BWFʢNPSFʣΛDBMMBCMFͱͯ͠ηοτ͍ͯ͠Δ❗

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ Πϕϯτ͸Ͳ͏΍ͬͯൃՐ͍ͯ͠Δʁ

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ Πϕϯτ͸Ͳ͏΍ͬͯൃՐ͍ͯ͠Δʁ w &WFOU.BOBHFSEJTQBUDI w UIJTMJTUFOFST w GPSFBDIͰ͙Δ͙Δ@DBMM-JTUFOFS🌀 w &WFOU.BOBHFS@DBMM-JTUFOFS w DBMMBCMFΛ࣮ߦ

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍ͯΔʁ Πϕϯτ͸Ͳ͏΍ͬͯൃՐ͍ͯ͠Δʁ w ·ͱΊΔͱɺɺ w .PEFMͷTBWF͕ݺ͹ΕΔͱ w ࣮ࡍͷTBWFॲཧͷޙʹ&WFOU.BOBHFSEJTQBUDI͕ൃՐ🔥 w @MJTUFOFSTͷDBMMBCMF͕࣮ߦ͞ΕΔ

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯίʔϧόοΫͷϥΠϑαΠΫϧ Θ͔ͬͨ͜ͱ w &WFOU.BOBHFSͷϓϩύςΟʹ&WFOUΛೖΕΔ   &WFOU.BOBHFSͷϓϩύςΟͷ&WFOUΛ࣮ߦ   ͱ͍͏γϯϓϧͳ࣮૷✨ w νϣϩͬͱॻ͘Α͏ͳॲཧ   ʢPSจ຺͕ଘࡏ͍͍ͯ͠ॲཧʣͱ͸   ૬ੑΑͦ͞͏🙌 w ิ଍   ࠓճศ্ٓলུͨ͠Օॴʹ   ଞͷEJTQBUDI&WFOU΋͍ͨΑ🦥

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯ $BLF1)1ͰݟΔ0CTFSWFSύλʔϯΠϕϯτγεςϜ w ΠϕϯτγεςϜ w IUUQTCPPLDBLFQIQPSHKBDPSFMJCSBSJFTFWFOUTIUNM w ಈ͍ͯΔ࢓૊Έ͸͖ͬ͞ͱಉ͡❗ w ࣗ෼ఆٛͨ͠λΠϛϯάͰొ࿥ɾൃՐ͕Ͱ͖Δ🔧

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ΠϕϯτγεςϜΛར༻࣮ͯ͠૷ $BLF1)1ͰݟΔ0CTFSWFSύλʔϯΠϕϯτγεςϜ w &WFOUͱͯ͠ొ࿥ w 6TFS$POUSPMMFSSFHJTUFS w 8FMDPNF-FUUFS&WFOU w ,BNBCPLP.BUFT$IFDLFS&WFOU w ͖ͬ͞͸5BCMFࣗ਎Λొ࿥͍͕ͯͨ͠ɺ   ࠓճ͸ࣗ෼Ͱఆٛͨ͠&WFOUΛొ࿥👉

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯΠϕϯτγεςϜ w &WFOUͷ࣮૷ʢ࣮ࡍͷॲཧʣ w &WFOU໊ͱ&WFOUͷඥ͚ͮ w 999&WFOUJNQMFNFOUFE&WFOUT w ޷͖ͳ໊લΛ͚ͭͯ0,🙆 ΠϕϯτγεςϜΛར༻࣮ͯ͠૷

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯΠϕϯτγεςϜ w ൃՐͷλΠϛϯάΛఆٛ w 6TFST5BCMFBGUFS4BWF w ʮ.PEFM6TFSTBGUFS4BWFʯ   ͱ͍͏ΠϕϯτΛEJTQBUDI w ิ଍   BGUFS4BWFʹهड़͍ͯ͠Δ͕ɺ   ࣗ෼Ͱఆٛͨ͠ϞσϧͷϝιουͰ΋0,   ŜţŦŷŢŴřŦƄŘ🙆 ΠϕϯτγεςϜΛར༻࣮ͯ͠૷

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯ w ίʔϧόοΫͷϥΠϑαΠΫϧ w खܰͳ֦ு🙆 w ΠϕϯτγεςϜ w ΑΓґଘੑͷ෼཭͕Ͱ͖Δײͩ͡🙌 w ʮ؂ࢹ͢Δऀʯͱʮ؂ࢹ͞ΕΔऀʯͱ ʮൃՐ͢ΔॲཧʯΛ͔ͬ͠Γ෼཭ શମͷ·ͱΊ

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-BSBWFMͰݟΔ0CTFSWFSύλʔϯ -BSBWFMͰݟΔ0CTFSWFSύλʔϯ w 0CTFSWFS w &MPRVFOUͷCPPUʹΑΔ֦ு w &WFOU w ʮ͞·͟·ͳΠϕϯτʯΛ0CTFSWFSԽͰ͖Δ

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0CTFSWFSΛར༻࣮ͯ͠૷🔮 -BSBWFMͰݟΔ0CTFSWFSύλʔϯ0CTFSWFS ˝࣮ࡍͷهड़ͨͪ IUUQTMBSBWFMDPNEPDTYFMPRVFOUFWFOUT w نఆͷΠϕϯτ͕༻ҙ͞Ε͍ͯΔ

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ࠓ͔Βͷ͋Β͢͡ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ w Ͳ͏΍ͬͯൃՐ͍ͯ͠Δʁ w ࣮͸ɾɾɾߏ଄ࣗମ͸DBLF1)1ͱΊͬͪΐࣅͯΔ✨

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ࠓ͔Βͷ͋Β͢͡ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w ొ৔ਓ෺ w .PEFMʢ؂ࢹ͞ΕΔऀʣ w 6TFS0CTFSWFSʢ࣮ࡍͷॲཧʣ w %JTQBUDIFSʢ؂ࢹ͢Δऀʣ

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Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w &WFOU4FSWJDF1SPWJEFSCPPU w ؂ࢹͷ։࢝🙆 w ͜ͷεϥΠυͰ͸͋Μ·Γ۷Γ·ͤΜ

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Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w )BT&WFOUTPCTFSWF w )BT&WFOUTSFHJTUFS0CTFSWFS w HFU0CTFSWBCMF&WFOUTΛά ϧάϧ🌀

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Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ

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Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w )BT&WFOUTSFHJTUFS.PEFM&WFOU w 6TFS0CTFSWFS͸ʮDSFBUFEʯΛ   ࣮૷͍ͯ͠Δ🙆 w )BT&WFOUTSFHJTUFS.PEFM&WFOU w EJTQBUDIFSMJTUFO

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Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w %JTQBUDIFSMJTUFO w ࣗ਎ͷϓϩύςΟUIJTMJTUFOFSTʹ MJTUFOFS DBMMBCMF Λొ࿥ w ͖ͬ͞ͷߏ଄ͱಉ͡ɾɾɾʂ🙆

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Ͳ͏΍ͬͯొ࿥͞Ε͍ͯΔʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w ·ͱΊΔͱɺɺ w &WFOU4FSWJDF1SPWJEFSͰొ࿥ॲཧΛهड़ w %JTQBUDIFSͷϓϩύςΟMJTUFOFSTʹ w DSFBUFE NPSF ͕DBMMBCMFͱͯ͠ηοτ͞ΕΔ❗

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Ͳ͏΍ͬͯൃՐ͍ͯ͠Δʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ

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Ͳ͏΍ͬͯൃՐ͍ͯ͠Δʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w %JTQBUDIFSHFU-JTUFOFST w ઌ΄Ͳొ࿥ͨ͠   MJTUFOFSTͰά ϧάϧ🌀 w MJTUFOFSʹ͸DBMMBCMF͕ೖ͍ͬͯΔ ͷͰ࣮ߦ͞ΕΔ

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Ͳ͏΍ͬͯൃՐ͍ͯ͠Δʁ -BSBWFMͰݟΔ0CTFSWFSύλʔϯͲ͏΍ͬͯಈ͍͍ͯΔʁ w ·ͱΊΔͱɺɺ w .PEFMͷTBWFϝιουΛݺͿͱ w %JTQBUDIFSEJTQBUDI͕ಈ͍ͯ w MJTUFOFSTͷDBMMBCMF͕࣮ߦ͞ΕΔ❗

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&MPRVFOUͷCPPUʹΑΔ֦ு -BSBWFMͰݟΔ0CTFSWFSύλʔϯ&MPRVFOUͷCPPUʹΑΔ֦ு w .PEFMʹCPPUΛఆٛ w ΠϕϯτΛΫϩʔδϟͱͯ͠ొ࿥ w νϣϩͬPSจ຺͕ؔ܎͋Δ࣌͸   ͜ΕͰ֦ுͰ͖ͦ͏🙌 w ิ଍   CPPUCPPUJOHCPPUFE͕͋Γͦ͏ʜ👀 IUUQTMBSBWFMDPNEPDTYFMPRVFOUFWFOUT

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$BLF1)1ͰݟΔ0CTFSWFSύλʔϯ w &MPRVFOUͷCPPUʹΑΔ֦ுɺखܰ🙆 w 0CTFSWFS w $POUSPMMFS.PEFM͔Βશ͘࢕͑ͳ͘ͳ Δఔ౓ʹ͸෼཭͞Ε͍ͯΔ w طଘͰ༻ҙ͞Ε͍ͯΔΠϕϯτҎ֎ʹ   ࣗ෼Ͱੜ΍͢͜ͱ΋Ͱ͖Δ✨ w ଟํ໘Ͱ֦ுੑ͕͋ͬͯεϯήɾɾɾ શମͷ·ͱΊ

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ݟൺ΂ͯΈΔ·ͱΊ

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ࣅ͍ͯΔͳʙͱࢥͬͨͱ͜Ζ🌸 ݟൺ΂ͯΈΔ·ͱΊ w ʮΠϕϯτͷϥΠϑαΠΫϧʯͱʮ&MPRVFOUͷCPPUʹΑΔ֦ுʯ w શମͷઃܭ w 0CTFSWFSͷొ࿥ɾൃՐͷॲཧͷྲྀΕ w ʮ؂ࢹ͞ΕΔʯʮ؂ࢹ͢Δʯʮ࣮ࡍͷॲཧʯͷ෼཭ߏ଄

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৭͕ग़͍ͯΔͳʙͱࢥͬͨͱ͜Ζ🌈 ݟൺ΂ͯΈΔ·ͱΊ w ʮ࣮ࡍͷॲཧʯ෦෼ͷଋറ౓ w $BLF1)1ͷํ͸&WFOU*OUFSGBDF͕ఏڙ͞Ε͍͕ͯͨɺ   -BSBWFM͸ࣗ༝ʹهड़Ͱ͖Δײͩͬͨ͡ w ʮ࣮ࡍͷॲཧʯ෦෼ͷӅΕ౓ w $BLF1)1͸ొ࿥ॲཧ͕ݟ͍͑ͯͨ👓͚Ͳɺ   -BSBWFM͸ຊ౰ʹݟ͑ͳ͍ɾɾɾʂ🙈

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͋͢ΈΊ΋ ݟൺ΂ͯΈΔ·ͱΊ w ༝ॹਖ਼͖͠ʮ0CTFSWFSύλʔϯʯ͕͜Μͳʹ਎ۙʹ͍ͨͳΜͯ w ͔͠΋ීஈ͸ύλʔϯΛҙࣝ͠ͳ͍Ͱ΋࢖͑ΔΑ͏ʹͳ͍ͬͯΔɾɾɾʂ w جຊతͳ࣮૷ํ਑͸ಉ͡ํ޲޲͍ͯΔͳʙ🙆 w ͜ͷล֦ு͍ͨ͠ƃũƄŢŔʂͱ͍͏ͱ͜Ζʹɾɾɾଘࡏʢ͍ʣΔɾɾɾʂ w ϑϨʔϜϫʔΫͷத਎Λ೷͍ͯΈͯຐ๏ͷཪଆΛ֞ؒݟͨײ͡👀

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ݟͯ͘ΕͯŗžŜƄŪŤƃŝœŖ😘 5SBDL"͸ͦͷ··ʂ📺 -5΋ΑΖͪ͘🐱