About Strict Memoization

by kenkaton

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Re:valua t ion https://fril.jp/ L ead & Delight User F irst Ownership Fail Smart ϝϞԽΛݫີʹߦͬͯΈΔ͓࿩

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ࣗݾ঺հ

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!LFOLBUPO !LFOLBUPO ϥΫϚͰαʔόʔαΠυΛ த৺ʹΤϯδχΞ΍ͬͯΔຽ ࣗݾ঺հ ͔ͱ͚Μ

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ࣗݾ঺հ ΋͏ͪΐͬ͜ͱ͚ͩৄࣗ͘͠ݾ঺հ͢Δͱʜ

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ࣗݾ঺հ ɾֶੜ࣌୅͸݋ಓ͔ͨ͠͠هԱ͕ͳ͍೔ʑΛૹΓʜ

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ࣗݾ঺հ ৽ଔೖࣾͨ͠ձࣾͰ͸ʜ ɹɾञ଄޲͚ͷجװγεςϜΛ ɹɹɹӦۀ։ൃೲ඼αϙʔτͳͲશ෦΍ͬͯΈͨΓ

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ࣗݾ঺հ γεςϜͷอकӡ༻͕ϝΠϯͷձࣾͰ ɹࣾ಺γεςϜΛ։ൃͯ͠ΈͨΓ͔ͯ͠Βʜ

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ࣗݾ঺հ ݱࡏ͸ϥΫϚͰ ɹαʔόʔαΠυΤϯδχΞΛͯ͠ΔຽʹͳΓ·ͨ͠

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ࣗݾ঺հ͸͜ͷ͘Β͍ʹ͓͍ͯͯ͠

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lϝϞԽzͷ࿩

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lϝϞԽzͱ͸ͳΜͧʁ

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lϝϞԽzͱ͸ͳΜͧʁ ϝϞԽʢӳ.FNPJ[BUJPOʣͱ͸ɺ ϓϩάϥϜͷߴ଎ԽͷͨΊͷ࠷దԽٕ๏ͷҰछͰ͋Γɺ αϒϧʔνϯݺͼग़͠ͷ݁ՌΛޙͰ࠶ར༻͢ΔͨΊʹอ ࣋͠ɺͦͷαϒϧʔνϯʢؔ਺ʣͷݺͼग़͠ຖͷ࠶ܭࢉ Λ๷͙ख๏Ͱ͋Δɻ

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lϝϞԽzͱ͸ͳΜͧʁ ʜͱ8JLJQFEJBʹॻ͍ͯ͋Γ·͕͢ 3VCZͰઆ໌͢Δͱ͜͏͍͏΍ͭ

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lϝϞԽzͱ͸ͳΜͧʁ ϑΟϘφον਺ྻΛྫʹ͢Δͱɺ7FSϝϞԽͯ͠ͳ͍ ʢ ʜΈ͍ͨͳͷʣ

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lϝϞԽzͱ͸ͳΜͧʁ 7FSϝϞԽͨ͠

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lϝϞԽzͱ͸ͳΜͧʁ ϝϞԽͰͲΕ͘Β͍ޮՌಘΒΕΔͷʁ

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lϝϞԽzͱ͸ͳΜͧʁ ̓ ̒ ̑ ̐ ̏ ̎ ̎ ̏ ̑ ̐ ̍ ̎ ̍ ̏ ̎ ̎ ̍ ̐ ̏ ̎ ̎ ̏ ̍ ̎ ̍ 7FSϝϞԽͯ͠ͳ͍ʢOʣ

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lϝϞԽzͱ͸ͳΜͧʁ ̓ ̒ ̑ ̐ ̏ ̎ ̎ ̏ ̑ ̐ ̍ ̎ ̍ ̏ ̎ ̎ ̍ ̐ ̏ ̎ ̎ ̏ ̍ ̎ ̍ 7FSϝϞԽͨ͠ʢOʣ

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lϝϞԽzͱ͸ͳΜͧʁ ͜Μͳײ͡Ͱ #FODINBSLೖΕͯ ಈ͔͢ͱʜ

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lϝϞԽzͱ͸ͳΜͧʁ Oͷͱ͖ ɹϝϞԽ͍ͯ͠Δͱ ɹɹɹඵɹ ɹϝϞԽ͍ͯ͠ͳ͍ͱ ɹɹɹඵ ɹ

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lϝϞԽzͱ͸ͳΜͧʁ Oͷͱ͖ ɹϝϞԽ͍ͯ͠Δͱ ɹɹɹඵɹ ɹϝϞԽ͍ͯ͠ͳ͍ͱ ɹɹɹඵ ɹ

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lϝϞԽzͱ͸ͳΜͧʁ ͭ·Γ ʮ͋ΕɺͳΜ͔ແବͳܭࢉΊͬͪΌͯ͠ͳ͍ʁʯ ɹɹɹ͍ͬͯ͏࣌ʹ͸ϝϞԽͰղܾ͢Δ͜ͱ΋ʜ

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lϝϞԽzͱ͸ͳΜͧʁ ͋Δ͚ΕͲ΋ʜ

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lϝϞԽzͱ͸ͳΜͧʁ ࠓ೔͸΋͏ͪΐͬͱݫີʹϝϞԽͯ͠ΈΔ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ ྫ͑͹͜Μͳ࣌ʢJO3BJMTʣ ɾ"SUJDMFϞσϧ͕͋ͬͯ ɾͦͷ"SUJDMFʹؔ࿈෇͚͞Εͨ  ɹɹDPNNFOUT͕͋Δ͔֬ೝ͍ͨ͠

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ ͓͓ʔʂϝϞԽ͞Ε͍͍ͯͯײ͡ʔʂ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ ͔ͱࢥ͍͖΍ɺ͜Μͳ৔߹͸Ͳ͏Ͱ͠ΐ͏ʁ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ TFMGDPNNFOUTTJ[F͕GBMTFͷͱ͖ ɹ!IBT@DPNNFOUGBMTF ࠶౓IBT@DPNNFOU ϝιουΛݺͿͱʜ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ ͋ΕʜʜϝϞԽʜʜͰ͖ͯʜʜͳ͍ʜʜ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ ͸͍ɻ੯͍͚͠ΕͲɺग़དྷͯ·ͤΜͶɻ ɹɹͰ͸ɺͲ͏͢Ε͹ʜ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ EFGJOFE ϝιουͱ͸ ɹ͕ࣜఆٛ͞Ε͍ͯͳ͚Ε͹ɺِΛฦ͢ɻ ɹఆٛ͞Ε͍ͯΕ͹ࣜͷछผΛද͢จࣈྻΛฦ͢ɻ IUUQTEPDTSVCZMBOHPSHKBMBUFTUEPDTQFDGEFGIUNMEFGJOFE

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ JSCͰ ɹͪΐͬͱ ɹɹ༡ΜͰΈΔ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ TFMGDPNNFOUTTJ[F͕GBMTFͰ΋ ɹEFGJOFE !IBT@DPNNFOUlJOTUBODFWBSJBCMF

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ ݫີͳϝϞԽɺ΍ͬͨͬͨʂʂ

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΋͏ͪΐͬͱ͚ͩݫີͳϝϞԽ ิ଍ɿ"DUJWF3FDPSEͰ͸RVFSZDBDIF΋ಇͨ͘Ίɺ  ɹϝϞԽͯ͠΋ޮՌ͸ബ͍͔΋

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·ͱΊ ϝϞԽ·ͱΊ ɾαΫοͱಋೖͰ͖ͯޮՌൈ܈ ɾॏ͍ͨॲཧ͸Կ౓΋ߦΘͳ͍Α͏ʹ ɹʢ֎෦αʔϏεͱ"1*࿈ܞ͍ͯ͠ΔΑ͏ͳʣ ɾͨͩ͠ɺϝϞϦΛͦͦ͜͜৯͏ͷͰ  ɹ΍Γ͗͢ʹ͸͝஫ҙΛ

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