Kotlin製自作OSSの普及戦略 ~kotlin-csvの実例を元に~ @Kotlin Fest 2022

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!,PUMJO'FTU খࢁ݈ଠ ,PZBNB,FOUB !EPZBBBBBLFO ,PUMJO੡ࣗ࡞044ͷීٴઓུ   dLPUMJODTWͷ࣮ྫΛݩʹd

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ਏ᫤ͳ'# $47ʹ௒ৄͦ͠͏ͳਓ͔Β จࣈ௒ʢ"༻ࢴຕ෼ʣͷਏ᫤ͳίϝϯτ͕😨 طଘͷ5SJFEBOE5SVF੒ख़ͨ͠$47ϥΠϒϥϦͷ্ʹ࢖͍΍͍͢%4-ΛॏͶͨ͜ͱʹ?ɻ $47͸ඍົͰ͢ ඍົͳͷ͸࢓༷ͷܽ೗ͱʮݱ৔ʯͰͷಛఆԽ΁ͷద߹ੑͷܽ೗ͳͷͰҾ༻͠·͢ ɻࢲ͸ɺ$47ʹڞ௨͢Δʮݱ࣮ੈքʯͰͷࠔ೉ͷൣғΛաখධՁͤͣɺ͜ΕΒͷݱ࣮໰୊Λѻ͏ͨΊʹ੒ ௕ͨ͠ϥΠϒϥϦΛʮϢʔβʔʹߴػೳͳϥΠϒϥϦ͸ඞཁͳ͍ʯͱҰׅΓʹ͠ͳ͍͜ͱΛ͓קΊ͠·͢ɻ ໰୊͸݁߹͞ΕΔ܏޲͕͋Γ·͕͢ɺԿ͕ʮ೿ख͚ͩͲෆཁͳʯػೳͳͷ͔͕໌Β͔Ͱ͸ͳ͍ͷʹରͯ͠ɺʮ?͋ͳͨ͸ຊ౰ʹͳͥ͜Μͳ͜ͱΛ͠ͳ͚Ε͹ͳΒͳ͔ͬͨͷ͔஌Γͨ͘ͳ͍Ͱ͠ΐ͏Ͱ΋ࢲΛ৴ͯ͡ɺ ͋ͳͨ͸ͦΕΛඞཁͱ͍ͯ͠Δʯͱ͍͏Α͏ͳ໰୊Ͱ͢ɻ ࢲ͸ɺ͋ͳͨͷϥΠϒϥϦ͕ެ։͍ͯ͠Δ෇ՃՁ஋ʢʮγϯϓϧ%4-Ϣʔεέʔεʯʣʹয఺Λ౰ͯΔ͜ͱΛ͓קΊ͠·͕͢ɺ੒ख़ͨ͠ʢϓϥάΠϯՄೳͳʣ$47ϥΠϒϥϦʢෳ਺Մʣͷ্ʹͦΕΛϥοϓ͢Δ͜ͱ Λ͓קΊ͠·͢ɻ ͳͥϓϥΨϒϧͳͷ͔ʁωΠςΟϒʯͳσΟεϏδϣϯ͸ؔ࿈ੑ͕͋Γ·͕͢ɺ+7.্Ͱ΋ɺϓϩάϥϜ͕ՄೳͳݶΓσʔλͷγϦΞϥΠζύʔεσʔλϚοϐϯάͷͭͷʮϑΝϛϦʔʯʹݻࣥ͢Δཧ༝͕͋ Γ·͢ɻ ྫ͑͹ɺΧϥϜϔομͷσʔλϑΟʔϧυϓϩύςΟ໊΁ͷҰ؏ͨ͠Ϛοϐϯά΍ɺͦΕΒ͕૬ޓӡ༻Ͱ͖ΔΑ͏ʹ෺ࣄΛઃఆ͢ΔҰ؏ͨ͠ํ๏ͳͲͰ͢ɻ ྫ͑͹ɺ֎෦ఆٛͷ$47ϑΝΠϧΛಡΈॻ͖͠ͳ͚Ε͹ͳΒͳ͍ΞϓϦʹऔΓ૊ΜͰ͍·͢ɻ ࣮ࡍʹ͸547 ·ͨɺ͜ΕΒΛ,PUMJOΫϥεʹσʔλϚοϐϯάͯ͠ɺ಺෦ͷϏδωεϩδοΫ΍αʔυύʔςΟͷ πʔϧʢ(6*΍%#ͳͲʣʹެ։͢Δඞཁ͕͋Γ·͢ɻ Ϩίʔυ൪߸ʯͷΑ͏ͳίϥϜͷݟग़͠ͷΑ͏ͳʮ୯७ͳʯ΋ͷΛ࠷ޙ·ͰҰ؏࣏ͨ͠ྍΛड͚Δͷ͸ɺ৴͡ΒΕͳ͍΄Ͳͷۤ௧Ͱ͢ɻ ΋ͬͱඍົͳ໰୊547ϑΝΠϧ λϒDTW ͸Ҿ༻ූͰғ·Εͨ஋ΛؚΉ͔ɺؚ·ͳ͍͔ ϔομͷॱ൪͸໌Β͔ʹͳΔͷ͔ ಡΈࠐΈ࣌ʹॱ൪͕ڰ͍ͬͯΔ͜ͱΛݕग़Ͱ͖Δͷ͔ ॻ͖ࠐΈ࣌ʹ͸Ͳ͏͔ ಡ ΈऔΓͱॻ͖ࠐΈ͸ಉ͡಺༰Λੜ੒͠ͳ͚Ε͹ͳΒͳ͍ͷ͔ɺͦΕͱ΋୯ʹ࿦ཧతʹಉ౳ͷ಺༰Λੜ੒͠ͳ͚Ε͹ͳΒͳ͍ͷ͔ʁεΩʔϚ͸σʔλͷݕূʹ࢖༻Ͱ͖Δ͔ DTWTDIFNBͷΑ͏ʹ ɺΧϥϜ໊Ͱσʔλ ΛݕࡧͰ͖Δ͔ ௥Ճ΍ܽམͨ͠ΧϥϜ͸͋Γ·͔͢ʁۭͷ஋͸ψϧ·ͨ͸Ͱ͔͢ʁ஋͸ೖྗ͞Ε͍ͯ·͔͢ ແޮͳ਺஋͸ڋ൱͞ΕΔ͔౉͞ΕΔ͔ ɺΤεέʔϓ͸࢖༻͞Ε͍ͯ·͔͢ ࢖༻͞Ε͍ͯΔ৔߹ɺ ͲͷΑ͏ͳελΠϧͰ͔͢ ຒΊࠐ·Εͨվߦ͸ଘࡏ͢Δ͔ʁ ͜ΕΒ͸໰୊ͷҰ෦ʹա͗·ͤΜɻओཁͳ$47ϥΠϒϥϦͷνΣοΫΠϯཤྺΛݟΕ͹ɺগͣͭ͠ղܾ͞Ε͖ͯͨ໰୊ͷྺ࢙ΛݟΔ͜ͱ͕Ͱ͖·͢ɻ ϥΠϒϥϦ࡞੒ऀͷࢹ఺Ͱ͸൚༻తͳέʔεͰ͸ɺಠࣗͷύʔαΛॻ͔ͳ͍͜ͱΛڧ͓͘קΊ͠·͢ɻ ϥΠϒϥϦͷফඅऀͷ؍఺͔Β͸ɺݹ͍੒ख़ͨ͠ڞಉσʔλϕʔεʹج͍͍ͮͯͳ͍$47ϥΠϒϥϦʹ͸͔ۙͮͳ͍Α͏ʹ͍ͨ͠ͱࢥ͍·͢෇ՃՁ஋͕Ͳ͏Ͱ͋ΕϦεΫΛෛ͏Ձ஋͸͋Γ·ͤΜɻ աڈ ೥ͷؒʹɺʮ͜ΕͰे෼ͩΑʯͱ͍͏༮ஓͳࢼΈ͕Կ౓΋ߦΘΕ͖ͯ·ͨ͠ ࢲ͸ଟ͘ͷ$47ϥΠϒϥϦ͕σʔλϚοϐϯάϥΠϒϥϦʹ΋ؔ࿈͍ͯ͠Δ͜ͱΛൃݟ͠·ͨ͠ɻࢲ͸ɺDTWͷಡΈࠐΈ͕σʔλϕʔεΞΫηε΍υΩϡϝϯτͷղੳʹ࢖༻͞ΕΔͷͱಉ͡Α͏ͳ࢖༻ྫ͕͋Δͱߟ ͍͑ͯ·͢DTWͷڞ௨ͷʮίΠϯͷཪଆʯͰ͢ɻͦͷ݁Ռɺྫ͑͹+BDLTPOσʔλόΠϯσΟϯά ΦϒδΣΫτϚούʔ +BDLTPO$47Ϟδϡʔϧɺ·ͨ͸4JNQMF'MBU.BQQFSKECDDTW͢΂ͯͷؔ࿈͢Δ Ϛοϐϯά΍ڞ௨ͷσʔλϚοϐϯάϥΠϒϥϦ KECDϕʔεͷϚούʔͷΑ͏ͳ ʹ౷߹͞Εͨ΋ͷʹͳΓ·͢ɻ ϓϥάΠϯՄೳͳ$47ϥΠϒϥϦΛ࢖༻͍ͯ͠Δ৔߹ɺϓϥάΠϯՄೳͳΦϒδΣΫτσʔλϚούʔͱʮϖΞϦϯάʯͰ͖ΔΑ͏ʹ͍ͨ͠ͱࢥ͏͔΋͠Εͳ͍ͷͰɺ͜ͷ఺ʹ஫ҙ͍ͯͩ͘͠͞ɻ͜ΕʹΑΓɺෳ ਺ͷγϦΞϥΠθʔγϣϯͰಈ࡞͢Δڞ௨ͷΫϥεఆٛͱΞϊςʔγϣϯηοτΛ࢖༻͢Δ͜ͱ͕Ͱ͖·͢ɻ ʢ˞%FFQ-ແྉ൛༁ʣ ※ ҰݴͰ͍͏ͱʮCSVͱ͍͏՝୊ΛաখධՁ͗͢͠ɻ੒ख़͍ͯ͠ͳ͍ϥΠϒϥϦ͸࢖͍ͨ͘ͳ͍ʯͱ͍͏ҙݟ

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