10秒で衝突するUUIDの作り方

by Hisateru Tanaka

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ඵͰিಥ͢Δ 66*%ͷ࡞Γํ

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ͨͳ͔ͻͯ͞Δ @tanakahisateru ॴ௕

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GFFFFFBCBFBE όʔδϣϯ͜Εͷѥछ όʔδϣϯ66*%ܗࣜͷ.%4)"ϋογϡ஋ φϊඵਫ਼౓ͷλΠϜελϯϓ ੢ྐྵ೥·Ͱ λΠϜελϯϓ͕ ॏෳͨ͠৔߹ͷγʔέϯε ."$ΞυϨε 66*% ཧ࿦্ઈରʹিಥ͠ͳ͍

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CCGBCECFG 66*%W ༧໿ϏοτϏοτҎ֎ͷϏοτ͢΂ͯϥϯμϜ

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? ͢΂ͯͷ66*%W ׾ߔয়䉺 ᆇژஹ ԯສ௨Γ

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શਓྨ͕ຖ೔ϒϩΫΛॻ͍ͯ΋ Ӊ஦͕ஹճऴᖼΛܴ͑Δࠒ·Ͱ ރׇ͠ͳ͍

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ۮવͷҰக ແ࡞ҝʹϥϯμϜ஋Λੜ੒͢Δͱʜ ʮͻͱͭͷΫϥεʹۮવ஀ੜ೔͕ ಉ͡ೋਓ͕͍Δݱ৅ʯ͕ى͖Δ

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૯Ωϟϥ਺छͷΨνϟ ࿈Ͱ͔ͿΒͳͯ͘΋ ࿈͢Δͱ͍͍͔ͩͨͿΔ ܦݧతʹΘ͔Γ΍͍͢ྫ

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? ͔ͿΓ֬཰ͷํ͕ߴ͘ͳΔ·Ͱͷੜ੒ճ਺ ژஹ ԯສճ໨

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શਓྨ͕ຖ೔ϒϩΫΛॻ͘ͱ ສ೥΄ͲͰͨͿΜিಥ

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ͦΜͳਓྨ஀ੜϨϕϧͷح੻ ҙ֎ͱى͖ͯΔͷͩͱ͔

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·͋ࢲ΄ͲͷϨϕϧʹͳΔͱ িಥͤ͞Δ·Ͱ ඵ΋͋Ε͹े෼Ͱ͕͢Ͷ ͲΕɺح੻ͱ΍ΒΛ ͓ݟͤ͠·͠ΐ͏͔ʜ

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https:// gist.github.com/ tanakahisateru/ ff65a6b572356fe3be3 570e0d8977feb σϞ

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NU@SBOE ٙࣅཚ਺ ͨͶ͔͋͠

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TSBOE OVMM JNQMPEF BSSBZ@NBQ GVODUJPO \SFUVSONU@SBOE ^ SBOHF TSBOE OVMM JNQMPEF BSSBZ@NBQ GVODUJPO \SFUVSONU@SBOE ^ SBOHF TSBOE OVMM JNQMPEF BSSBZ@NBQ GVODUJPO \SFUVSONU@SBOE ^ SBOHF ࠶ݱՄೳ γʔυ͕߹͑͹

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?໿ԯύλʔϯͷٙࣅཚ਺਺ྻ͔͠ͳ͍

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? ූ߸ͳ͠Ϗοτ੔਺͕͔ͿΔ·Ͱͷੜ੒ճ਺ظ଴஋ αʔόʔϓϩηε͕ੜ·ΕΔͱ͖ɺٙࣅཚ਺਺ྻ্ͷҐஔ͸ઌ಄ʹ໭Δ ˠҐஔͣΕ͕ॏͳΔػձ͸ଟ͍ ͏·͘਺ྻ্ͷҐஔ͕ͣΕͯ΋ͨͿΜશࠃຽ͕೔͙Β͍ͰΞ΢τ ͝ொ಺ͷօ༷͕࢖͏ఔ౓Ͱ೔΋ͨͳ͍

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SBOEPN@JOU SBOEPN@CZUFT ਅཚ਺㲈EFWVSBOEPN ͜͏͍͏ͱ͖͸ͬͪ͜

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ٙࣅཚ਺࢖ͬͱ͍ͯ 66*%িಥݴ͏ͳ

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0OFNPSFUIJOH

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λΠϜελϯϓ ඵ ͱϓϩηε*%ͷ৐ࢉ݁Ռͷ ϏοτΛͰͨΒΊʹ൓స͢Δ ࣗಈܾఆ͞ΕΔٙࣅཚ਺γʔυ

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λΠϜελϯϓ ඵ ϓϩηε*%ͷ৐ࢉ݁Ռͷ ϏοτΛ ͰͨΒΊʹ൓స͢Δ σϞͳΒඵఔ౓ͷࠩ ఔ౓ͷܻ Ͳ͏ͤສ·Ͱͷܻ͔͠ ΏΒ͕͗ͳ͍ͩΖ͏ͱ͍͏૝ఆͰ ภΓ͋Δ

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NU@TSBOE OVMM ສύλʔϯ ճఔ౓Ͱ͔ͿΔ 1)1σϑΥϧτͷࣗಈॳظԽ ݱ࣮ʹ͸͓ͦΒ͘ϓϩηε࠶ར༻Λߟྀͯ͠ສճ͙Β͍ $(*Ϟʔυͩͱຖճཚ਺ྻͷઌ಄ͳͷͰճͰ౰ͨΔ