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ؔ਺ܕݴޠͱࢲ • ϑΝϯΫγϣϯ۞ָ෦ • @color_box

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ࣗݾ঺հ • @color_box • Ӭ࿨γεςϜϚωδϝϯτ • ޷͖ͳؔ਺͸map

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ؔ਺ܕͷܦݧ • SML2ϲ݄ • Elixir3ϲ݄

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ΞδΣϯμ • ࠷ॳʹ৮ͬͨؔ਺ܕݴޠ͔Βಘͨ΋ͷ • Elixirͷ࢓ࣄ͔Βಘͨ΋ͷ

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࠷ॳʹ৮ͬͨؔ਺ܕݴޠ • SML(StandardMetaLanguage) • 8೥͘Β͍લ • ֶੜ࣌ͷ՝୊

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hd::tl • ͦΕ·Ͱ৮ͬͨ͜ͱͷͳ͍Ϧετͷѻ͍ํʹ ۤ࿑ͨ͠ • hd::tlͰϦετͷૢ࡞Λߦ͏֓೦Λशಘ • ؔ਺ܕݴޠʹର͢Δҙຯෆ໌ײ

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ҙຯෆ໌ײ • ࠷ॳ͸ۤखҙ͕ࣝ͋ͬͨ΋ͷͷɺ՝୊Ͱ໿50 ݸͷجຊతͳؔ਺Λ࠶࣮૷ • ͓ͳ͡Έͷؔ਺Λ࣮૷ • flatten,foldl,foldr,flat,map,filter,split

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੍ݶ • Ұͭͷؔ਺ఆٛͷΈͰɺಗ໊ؔ਺Λ࢖Θͣʹ ߦ͏ͱ͍͏੍ݶ • جຊతͳॲཧΛ೺Ѳ͠࠶ؼॲཧʹ΋׳ΕΔ͜ ͱ͕Ͱ͖ͨ

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جૅ஁࿉͕େࣄ • ॳݟͰΑ͘Θ͔Βͳ͍֓೦͕ग़͖ͯͨΒ • ෼͔ΔൣғͰशಘΛਐΊͯɺ܁Γฦ͢ɻ • ͢Δͱɺͦͷ͏ͪཧղͰ͖ΔΑ͏ʹͳΔɻ

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༨ஊ • ͦͷ࣌ͷ՝୊Ͱ࡞ͬͨ΋ͷ͸ΦηϩͷAI • min−max๏ɺα-β๏

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AI • 8*8ͷϚε໨ʹରͯ͠ɺͲͷϚε͕Ͳͷఔ౓ڧ͍͔ɺͱ ͍͏ධՁؔ਺Λ࡞੒ɻ • ͋ͱ͸ɺͲͷϚε໨ʹஔ͔Ε͔ͨΛ࠶ؼతʹνΣοΫ͠ ͍͖ͯɺ࠷ऴతʹ࠷΋ධՁͷߴ͍ɺϚε໨Λબ୒͢Δ • ద౰ͳධՁؔ਺Ͱ΋͋Δఔ౓ਂ͘ಡΉͱউͯͳ͍ • ίπ͸࢛۱ϚεͷධՁΛߴ͓ͯ͘͘͜͠ͱ

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Elixirͷ࢓ࣄ͔Βಘͨ΋ͷ

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ͦ΋ͦ΋Elixirͱ͸ • ؆୯ʹݴ͏ͱElixir͸ErlangΛॻ͖΍ͨ͘͢͠ ΋ͷ

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ͦ΋ͦ΋Elixirͱ͸ • Elixir͸Erlangͱಉ͡VM্Ͱಈ࡞͢Δؔ਺ܕݴޠ • Erlang͸whatappͳͲͷϢʔβʔ਺͕ଟ͍ΞϓϦέʔ γϣϯͰಈ࡞͍ͯ͠Δ • Erlang͸Ұൠతʹॻ͖ਏ͍ɺशख़ʹ͕͔͔࣌ؒΔͱ͍ ͏ଆ໘͕͋Δ • Elixir͸ॻ͖ਏ͍ͱ͍͏໰୊Λղܾͨ͠ݴޠ

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Elixir Conf • 2017/4/1 • Elixir Conf 2017 • Elixir/ErlangͷࣄྫΛͨ͘͞Μฉ͘ • ߴෛՙʹڧ͍ݴޠͱͷ͜ͱͰɺϩϚϯΛײ͡Δɻ • ͍͔ͭElixirΛ࢖ͬͯ࢓ࣄͯ͠Έ͍ͨͳͱࢥͬͨ

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whaapp • ͪͳΈʹ • whatappͷϢʔβʔ਺͸9000ສ • ͦΕΛ50ਓͷΤϯδχΞͰࢧ͍͑ͯΔ • Ұਓ͋ͨΓ180ສϢʔβʔΛࢧ͑ΕΔܭࢉ • ਺ࣈ͸ 2015/09

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࢓ࣄͰElixir • Ҋ֎ૣͦ͘ͷΑ͏ͳػձʹܙ·ΕΔ • 4,5݄͸ElixirͰ࢓ࣄ

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࢓ࣄ্Ͱಘֶͨͼ • ࢓ࣄͰೋϲ݄͘Β͍ElixirΛ৮ͬͨͷͰͦͷ࣌ ͷ஌ݟΛڞ༗

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mix • ElixirͷϏϧυπʔϧɺґଘ؅ཧπʔϧͱͯ͠ͷଆ໘΋͋Δ • ElixirٴͼErlangͷϥΠϒϥϦ΋ಡΈࠐΊΔɻ • ґଘղܾ࣌ʹϓϩδΣΫτͰ࢖༻͢ΔϥΠϒϥϦͷίʔυ ΛϓϩδΣΫτ௚Լʹclone͢Δ • ElixirͰ࢖͑ΔϥΠϒϥϦʹ͸໌Β͔ʹϝϯς͞Εͯͳ͍΋ ͷ΋͋ͬͨΓ͢ΔͷͰ஫ҙ͕ඞཁɻ

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࢓ࣄͰ࢖ͬͨϥΠϒϥϦ • Cowboy • Ecto

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Cowboy • ϚΠΫϩαʔϏεͷҰ෦ͱͯ͠ͷAPIαʔόΛ ͜ΕͰ࡞੒ • Elixir੡ͷWebFWͱͯ͠Phoenix͕༗໊͕ͩɺ ࠓճ͸࠾༻ͤͣ • ୯७ͳAPIʹPhoenix͸େ͖͗͢ΔͨΊ

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Cowboy REST Flowchart • CowboyΛ࢖͏ͳΒ཈͓͑ͯ͘ͱศར • ֤ίʔϧόοΫ͕ͲͷΑ͏ʹݺ͹ΕΔ͔͕Θ ͔Δ • https://ninenines.eu/docs/en/cowboy/1.0/ guide/rest_flowcharts/

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Ecto • DB wrapper • DB઀ଓʹ࢖༻͠ɺύϥϝʔλόϦσʔγϣϯʹ΋࢓༷ • ֎෦APIΛୟ͘ࡍͷϦΫΤετߏ଄ମΛEctoͰఆٛ(DB ΁ͷอଘ͸ߦΘͳ͍) • ϦΫΤετΛ࣮ࡍʹߦ͏લʹɺߏ଄ମʹηοτ͞Ε͍ͯ Δ஋͕ຊ౰ʹਖ਼͍͔͠ͷόϦσʔγϣϯΛߦ͍͔ͨͬͨ

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ࠔͬͨ࣌ͷࢀরઌ • HexDocͱ࣮૷ΛݟΕ͹͍͍ͩͨ෼͔Δɻ

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HexDoc • ॳΊͯݟΔϥΠϒϥϦ΍ؔ਺Λ࢖͏࣌͸·ͣ ͜͜ΛݟΔɻ • Ұ௨Γ໨Λ௨͢ͱͳΜͱͳ͘࢖͍ํ͕Θ͔ Δɻ

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࣮૷ • ͦΕͰ΋Α͘Θ͔Βͳ͍࣌͸࣮૷΋ݟΔ • ϓϩδΣΫτͰ࢖༻͢Δίʔυ͸deps௚Լʹ શͯೖͬͯ͘Δ • ͔ͩΒͦͷؾʹͳΕ͹શ෦ಡΊΔ

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Erlang੡ϥΠϒϥϦ • Elixir͸ErlangͰॻ͔ΕͨϥΠϒϥϦ΋࢖༻Մೳɻ • Erlang੡ͷϥΠϒϥϦ΋ಡΉඞཁ͕͋Δ • ElixirΛ৮Δʹ͸Erlangͷ஌ࣝ͸ඞਢ • ޙड़ͷύλʔϯϚονΛཧղ͍ͯ͠ΔͱɺErlang ͷίʔυ΋ͳΜͱͳ͘ಡΊΔΑ͏ʹͳΔɻ

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σόοά࣌ͷ͋Ε͜Ε • iexίϚϯυͰ্ཱ͕ͪΔREPL؀ڥ͕ศར • iex -S mixͰϓϩδΣΫτͷίʔυΛऔΓࠐΜ ͰREPL؀ڥΛ্ཱͪ͛Δ͜ͱ͕Ͱ͖Δɻ • ࣗ࡞ͷΫϥεΛݺͼग़ͯ͠ɺ௚઀ςετՄ ೳɻ

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σόοά࣌ʹΑ͘࢖͏΋ͷ • IO.inspects() • IEx.pry

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IO.inspects() • ΦϒδΣΫτΛೖΕΕ͹ͦΕʹؔ͢Δ৘ใΛ ు͖ग़ͯ͘͠ΕΔ • printσόοά࣌ʹଟ༻

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IEx.pry • σόοΨ • εςοϓ࣮ߦ͸Ͱ͖ͳ͍ • Ұ࣌ఀࢭͨ͠ՕॴͰ೚ҙͷΦϒδΣΫτͷத ਎Λ֬ೝՄೳ

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ϨϏϡʔͰ਎ʹ͚ͭͨ΋ͷ • ύλʔϯϚονͷॏཁੑ • ύλʔϯϚονͷࢦఠΛͨ͘͞Μ௖͍ͨɻ

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ύλʔϯϚονͷछྨ • caseΛ࢖͏λΠϓ • ؔ਺ͷγάωνϟͰϚονͤ͞ΔλΠϓ • =୯ମͰϚονͤ͞ΔλΠϓ

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caseΛ࢖͏λΠϓ • ࠷΋Ұൠతʁ • ୯Ұͷؔ਺ͷதʹଘࡏ͢Δ

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ྫ

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ؔ਺ͷγάωνϟͰϚονͤ͞ ΔλΠϓ • ෳ਺ͷؔ਺Λఆٛͯ͠ɺݺͼग़࣌͠ʹͦΕΒ ͕੾ΓସΘΔ

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ྫ

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=୯ମͰϚονͤ͞ΔλΠϓ • ୅ೖͰ͸ͳ͘ύλʔϯϚον

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ྫ

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Մಡੑͷ޲্ • ύλʔϯϚονΛ͏·͘࢖͏ͱՄಡੑΛ্͛ ΕΔ

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ྫ • ؔ਺ͷҾ਺ʹରͯ͠caseʹΑΔύλʔϯϚο νΛ͢Δͷ͸NG • ؔ਺ͷγάωνϟͰϚον͢Δ • ͜ΕʹΑͬͯݸʑͷؔ਺͕খ͘͞ͳΓɺՄಡ ੑ্͕͕Δ

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༨ஊ • ύλʔϯϚον͕Θ͔ΔͱErlang΋Կͱͳ͘ ಡΊΔΑ͏ʹͳΔ(ؾ͕͢Δ) • ύλʔϯϚονʹ͍ͭͯ৭ʑࢦಋΛड͚ͨ ޙɺhex಺ͷErlangϥΠϒϥϦΛಡΜͰΈΔ ͱɺલΑΓ΋ಡΊΔΑ͏ʹͳ͍ͬͯΔɻ

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ࠓ೔࿩ͨ͜͠ͱ • ؔ਺ܕݴޠͷ࠷ॳͷนΛಥഁ͢ΔͳΒ৭Μͳ ؔ਺Λ࠶࣮૷͢Δͱ৭ʑΘ͔ΔΑ͏ʹͳΔ • Elixir։ൃ࣌ͷ͋Ε͜Ε