アドベントカレンダーを完走する技術 / Techniques for completing an advent calendar

ΞυϕϯτΧϨϯμʔΛ ׬૸͢Δٕज़ ਫ ϒϩάษڧձ ΞϥΠΞϯεࣄۀ෦͠Μ΍

ࣗݾ঺հ ͠Μ΍ shinyaa31 ɾ೥݄ɿΫϥεϝιουʹδϣΠϯ "84ίϯαϧςΟϯά෦ޙͷ"84ࣄۀຊ෦ ɾΫϥεϝιου೥໨ ɾ೥݄ݱࡏɿΞϥΠΞϯεࣄۀ෦ΤϯδχΞάϧʔϓϞμϯσʔλελοΫ .%4
νʔϜʹॴଐ ɹɾσʔλ෼ੳք۾ͷ͓࢓ࣄͨ͠ΓαʔϏεʹڵຯؔ৺͕͋ͬͨΓ͢ΔਓͰ͢ ɹɾ͓࢓ࣄͱͯ͠͸.%4ͷ֤छαʔϏε ECU 4OPX fl BLF -PPLFS౳ Λѻ͍ͬͯ·͢ ɾϒϩάपΓͷτϐοΫ ɹɾδϣΠϯҎདྷɺ೥࿈ଓ೥ؒຊ౤ߘܧଓத ɹɾ%FWFMPQFST*0্࢙ॳͷʮஶऀ୯ҐͰͷຊࣥචʯୡ੒ ɹɾ%FWFMPQFST*0Ͱͷϒϩάࣥචʹ͓͚Δ֤छܒൃɾܒ໤׆ಈΛ࣮ફத ɹɾࣾ಺ษڧձʮϒϩάษڧձʯΛاըˍओ࠵ ɹɾΞυϕϯτΧϨϯμʔʹटಥͬࠐΈ͕ͪ https://dev.classmethod.jp/author/shinyaa31/

ΞυϕϯτΧϨϯμʔͱ͸ʁ ੈؒҰൠʹ͓͚ΔΞυϕϯτΧϨϯμʔ *5ۀքʹ͓͚ΔΞυϕϯτΧϨϯμʔ ΞυϕϯτΧϨϯμʔ "EWFOUDBMFOEBS ͸ɺΫϦεϚε·Ͱͷظؒʹ೔਺Λ਺͑ΔͨΊ ʹ࢖༻͞ΕΔΧϨϯμʔͰ͋Δɻ଴߱અͷظؒʢΞυϕϯτɺΠΤεɾΩϦετͷ߱஀Λ ଴ͪ๬Ήظؒʣʹ૭Λຖ೔ͻͱͭͣͭ։͚͍ͯ͘ΧϨϯμʔͰ͋Δɻ͢΂ͯͷ૭Λ։͚ऴ ΘΔͱܴ͑ͨ͜ͱʹͳΔɻ
ୠ͠ຖ೥มԽ͢ΔΞυϕϯτͷظؒʹؔΘΒͣ ɺ࣮ࡍʹ͸݄೔͔Β։࢝͠ݸͷ ʮ૭ʯ͕͋Δ৔߹͕ଟ͍ɻΞυϕϯτΧϨϯμʔ͸ɺ૭Λ։͘ͱࣸਅ΍Πϥετɺࢻ΍෺ ޠͷҰฤɺνϣίϨʔτͳͲͷ͓՛ࢠɺখ͞ͳଃΓ෺౳͕ೖ͍ͬͯΔ͜ͱ͕ଟ͍ɻफڭ ৭ͷڧ͍΋ͷ΋͋Ε͹ɺ୯ʹޘָ༻ͷ΋ͷ΋͋Δɻ Πϯλʔωοτ্ͳͲͰɺ݄ͷ೔͔Β೔·ͰʹɺಛఆͷςʔϚʹԊͬͯຖ೔ϒϩάͳͲʹهࣄΛ౤ ߘ͍ͯ͘͠ͱ͍͏اը͕͋ΔɻݩʑͷΞυϕϯτΧϨϯμʔʹͳͧΒ͑ͯɺ͜ͷاը΋ΞυϕϯτΧϨϯ μʔͱݺ͹Ε͍ͯΔɻಛʹϓϩάϥϛϯάʹؔ࿈͢ΔΞυϕϯτΧϨϯμʔͷاը͕ଟ਺ߦΘΕ͍ͯΔɻ ෳ਺ਓ͕ॱʹهࣄΛॻ͘ํ͕ࣜ͋Δɻෳ਺ਓ࣮ࢪͷ৔߹͸ɺΧϨϯμʔΛ؅ཧ͢ΔαΠτΛ࣠ʹಛఆͷ ςʔϚʢϓϩάϥϛϯάݴޠ΍࢖༻͢Δٕज़ͳͲʣΛܾΊͯࢀՃऀΛืΓɺॱʹ౤ߘΛߦ͏ͱ͍͏ܗࣜ ͕͋ΔɻࢀՃऀ͕ଟ͍৔߹ɺΫϦεϚεΛ௒݄͑ͯͷऴΘΓ΍ͦΕҎ্ଓ͘͜ͱ΋͋Γɺ೥ଓ͍ͨ ྫ΋͋Δɻ ޙུ ྺ࢙ΛͨͲΔͱ͓͓Αͦ೥ࠒ͔Β࢝·͍ͬͯͬͨͱ͞ΕΔɻ ΞυϕϯτΧϨϯμʔ - Wikipedia https://ja.wikipedia.org/wiki/ΞυϕϯτΧϨϯμʔ

*5ۀքʹ͓͚ΔΞυϕϯτΧϨϯμʔܥͷओͳαʔϏε 2JJUB"EWFOU$BMFOEBS "EWFOUBS https://adventar.org/ https://qiita.com/advent-calendar/ ˞اըࣗମ͸αʔϏεΛ࢖Θͳͯ͘΋ల։ग़དྷΔ͕ɺ׆ಈΛࣾ಺֎ʹ޿͘Ξϐʔϧग़དྷΔ͜ͱɺ ɹ׆ಈࣗମΛޙͰৼΓฦΓ͠΍͘͢ͳΔ͜ͱΛߟ͑Δͱʮ׆ಈه࿥ʯͱͯ͠ొ࿥͓ͯ͘͠ͷ͕Φεεϝɻ

ΞυϕϯτΧϨϯμʔاը΁ͷࢀՃλΠϓ ࣾ֎ͷاըʹࢀՃ͠ɺຊͷΤϯτϦΛ ɹࣾ಺֎ͷϢʔβʔͱڞʹܨ͍Ͱ͍͘ ࣾ಺Ͱෳ਺ϝϯόʔΛूΊɺຊͷΤϯτϦΛ ɹͦͷෳ਺ϝϯόʔؒͰܨ͍Ͱ͍͘ɹ

Ϋϥεϝιουʹ͓͚ΔΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ΫϥεϝιουͷϝϯόʔͷΈͰߏ੒͞Εͨ اը͕͓ͦΒ͘࠷ॳͱࢥΘΕΔ ΞυϕϯτΧϨϯμʔͷهࣄҰཡc%FWFMPQFST*0 IUUQTEFWDMBTTNFUIPEKQSFGFSFODFDBUBEWFOUDBMFOEBS

<աڈ࣮ࢪ͞ΕͨΞυϕϯτΧϨϯμʔҰཡ >˞ΫϥεϝιουϝϯόʔͷΈͰߏ੒͞Εͨ΋ͷͷΈൈਮ Ϋϥεϝιουʹ͓͚ΔΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ ɾΫϥεϝιουΞυϕϯτΧϨϯμʔ ೥ ɾΞυϕϯτΧϨϯμʔ εϚϗ
ɾΞυϕϯτΧϨϯμʔɿ"84$MPVE'PSNBUJPOϏοάόϯςϯϓϨʔτ ೥ ɾ౎ݩͱֶͿ*P5ΞυϕϯτΧϨϯμʔͩͬͨ ɾ(VMQ4PMP"EWFOU$BMFOEBS ɾ5BCMFBV4PGUXBSF5JQT7J["EWFOU$BMFOEBS ೥ ɾ"84࠶ೖ໳ΞυϕϯτΧϨϯμʔ ɾΞυϕϯτΧϨϯμʔɿ"84ϞόΠϧ ೥ ɾਓͰ)BEPPQͷ࿩Λ͢Δ"EWFOU$BMFOEBS ɾ-VJHJ"EWFOU$BMFOEBS ɾ"NB[PO2VJDL4JHIU"EWFOU$BMFOEBS ɾ"MUFSZY"EWFOU$BMFOEBS ೥ ɾΫϥεϝιουػցֶश"EWFOU$BMFOEBS ɾΫϥεϝιου5BCMFBV'VODUJPOT"EWFOU$BMFOEBS ɾ4FSWFSMFTT"EWFOU$BMFOEBS ɾ"84SF*OWFOU৽αʔϏε঺հ"EWFOU$BMFOEBS ೥ ɾΫϥεϝιου"NB[PO4BHF.BLFS"EWFOU$BMFOEBS ɾ#PUP"EWFOU$BMFOEBS ɾ"MUFSZY8FFLMZ$IBMMFOHF தڃϨϕϧ "EWFOU$BMFOEBS ɾ"MUFSZY1SFEJDUJWF5PPMಓ৔"EWFOU$BMFOEBS ɾ"MUFSZYˍ5BCMFBV࿈ܞ"EWFOU$BMFOEBS ೥ ɾػցֶशPO"84"EWFOU$BMFOEBS ɾ4OPX fl BLF"EWFOU$BMFOEBS ೥ ɾΫϥϝιϏΪφʔζͷѹ౗త੒௕"EWFOU$BMFOEBS ɾΫϥεϝιουY#JH2VFSZ"EWFOU$BMFOEBS ɾ"MUFSZY࠶ೖ໳"EWFOU$BMFOEBS ɾΠϯϑΥϚςΟΧ"EWFOU$BMFOEBS ɾΫϥεϝιουɿ$4ΞφϦςΟΫε"EWFOU$BMFOEBS

<աڈ࣮ࢪ͞ΕͨΞυϕϯτΧϨϯμʔҰཡ >˞ΫϥεϝιουϝϯόʔͷΈͰߏ੒͞Εͨ΋ͷͷΈൈਮ Ϋϥεϝιουʹ͓͚ΔΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ ɾΫϥεϝιου;FOEFTLೖ໳"EWFOU$BMFOEBS ɾ&NQMPZFF&YQFSJFODF"EWFOU$BMFOEBS ɾ4OPX fl
BLFΛΑΓ࢖͍͜ͳͦ͏ʂ"EWFOU$BMFOEBS ɾΫϥεϝιου(PPHMF$MPVE"EWFOU$BMFOEBS ɾΞϊςʔγϣϯגࣜձࣾ"845FDIOJDBM4VQQPSU"EWFOU$BMFOEBS ɾܹ೤ʂ೔੡඼ʂ࠷ڧͷσʔλܥ4BB4͸ͲΕܾͩఆઓΞυϕϯτΧϨϯμʔ ɾ$PDOWJNΛ৮ͬͯΈΑ͏"EWFOU$BMFOEBS ɾ%FWFMPQFST*0ஶऀͷΈΜͳʹ৭ʑฉ͍ͯΈͨ"EWFOU$BMFOEBS ೥ ɾ4OPX fl BLFΛ΋ͬͱ࢖͍͜ͳͦ͏ʂ"EWFOU$BMFOEBS ɾΞϊςʔγϣϯגࣜձࣾ"845FDIOJDBM4VQQPSU"EWFOU$BMFOEBS ɾ"MUFSZY4FSWFSΞυϕϯτΧϨϯμʔ ɾ"NB[PO$POOFDUΞυϕϯτΧϨϯμʔ ɾΞϥΠΞϯε౷ׅ෦ΞυϕϯτΧϨϯμʔ ɾΫϥεϝιουػցֶशνʔϜΞυϕϯτΧϨϯμʔ

ΞυϕϯτΧϨϯμʔاըʹࢀՃ͢ΔϝϦοτ 🌟اը΁ͷࢀՃΛ௨ͯ͡ަྲྀ͕ਤΕΔ 🌟z͓ࡇΓײzΛຯΘ͑Δ 🌟Ξ΢τϓοτͷ੒Ռͱͯͪ͠ΌΜͱͨ͠ܗͰ࢒Δ 🌟ࣾ಺֎΁ͷྑ͍ΞϐʔϧʹͳΔ 🌟ࣥචܦݧɺεΩϧͷ޲্ Ϋϥεϝιουࣾһ͕اըɾࢀՃ༧ఆͷʰ2022೥ΞυϕϯτΧϨϯμʔʱͷ͓஌Βͤ | DevelopersIO
https://dev.classmethod.jp/articles/introduce-advent-calendar-2022-by-classmethod-members-and-members-participation/ Ϋϥεϝιουࣾһ͕اըɾࢀՃ༧ఆͷʰ2021೥ΞυϕϯτΧϨϯμʔʱͷ͓஌Βͤ | DevelopersIO https://dev.classmethod.jp/articles/introduce-advent-calendar-2021-by-classmethod-members-and-members-participation/ Ϋϥεϝιουࣾһ͕اըɾࢀՃ༧ఆͷʰ2020೥ΞυϕϯτΧϨϯμʔʱͷ͓஌Βͤ | DevelopersIO https://dev.classmethod.jp/articles/introduce-advent-calendar-2020-by-classmethod-members-and-members-participation/ Ϋϥεϝιουࣾһ͕اըɾࢀՃ༧ఆͷʰ2019೥ΞυϕϯτΧϨϯμʔʱͷ͓஌Βͤ | DevelopersIO https://dev.classmethod.jp/articles/introduce-advent-calendar-2019-by-classmethod-members-and-members-participation/ Ϋϥεϝιουࣾһ͕اըɾࢀՃ༧ఆͷʰ2018೥ΞυϕϯτΧϨϯμʔʱͷ͓஌Βͤ | DevelopersIO https://dev.classmethod.jp/articles/introduce-advent-calendar-2018-by-classmethod-members-and-members-participation/ Ϋϥεϝιουࣾһ͕اըɾࢀՃ༧ఆͷʰ2017೥ΞυϕϯτΧϨϯμʔʱͷ͓஌Βͤ | DevelopersIO https://dev.classmethod.jp/articles/introduce-advent-calendar-2017-by-classmethod-members-and-members-participation/ Ϋϥεϝιουࣾһ͕اըɾࢀՃ༧ఆͷʰ2016೥ΞυϕϯτΧϨϯμʔʱͷ͓஌Βͤ | DevelopersIO https://dev.classmethod.jp/articles/introduce-advent-calendar-2016-by-classmethod-members-and-members-participation/

ΞυϕϯτΧϨϯμʔاըΛz׬૸zͤ͞Δʹ͸ 🌟ݸ Ҏ্ ͷzاըΛ૸Γ੾ΔϒϩάωλzΛἧ͑Δ͜ͱ͕ग़དྷΔ͔ ɹɾʮԿ͔ॻ͘ʯͰຊἧ͑Δ ἧ͏ͷΛظ଴͢Δ ͸݁ߏແ๳ ɹɾಛఆͷςʔϚͰݸҎ্ωλ͕͋Γͦ͏ ݟ͚ͭΒΕͦ͏
ɺ·ͨ͸ςʔϚͰਓ छ ͷల։͕ ɹɹظ଴ग़དྷͦ͏ͳςʔϚΛߟ͑Δͷ͕ઌܾ ɹɾωλͭͭͷαΠζײʹ͍ͭͯ͸େ͖ա͗ͳͯ͘΋ྑ͍ɻखࠒײॏࢹͰ0,ɻʮେ࡞େ௕ฤຊʯͩͱർΕΔɻ 🌟ͦͷωλΛॻ͖੾Δ ࣥච͕ܭࢉग़དྷΔ ϝϯόʔΛूΊΔ͜ͱ͕ग़དྷΔ͔ ɹɾͦͷਓ਺ΛूΊΒΕͦ͏ͳاըʹͳ͍ͬͯΔ͔ʁ ɹɾਓ͋ͨΓͷຊ਺ʹ͍ͭͯɺͦͷຊ਺Λॻ͖੾Δମྗ͕͋Δϝϯόʔ͕ू·͍ͬͯΔ͔ʁ ɹɹɾྫ ຊΛਓͰ΍ΔʹਓຊܭࢉɺຊΛਓͰ΍Δʹਓຊܭࢉ 🌟࣌ؒత༨༟Λ࣋ͬͯਐΊΔ͜ͱ͕ग़དྷΔ͔ ɹɾ։࠵࣌ظ͸݄ͷ๩͍࣌͠ظਅͬ੝Γɻ ɹɾۀ຿Λߦ͍ͳ͕Βͦͷຊ਺Λظݶ ౤ߘ೔ ·ͰʹΫϦΞग़དྷΔ͔ʁ 🌟͍͟ͱͳͬͨΒϦΧόϦग़དྷΔϝϯόʔ͕͍Δ͔ɺετοΫ͕͋Δ͔ ɹɾ௚લʹͳͬͯʮ͍͢·ͤΜؒʹ߹Θͳͦ͞͏Ͱ͢ʯ͸Α͋͘Δ࿩ ɹɾͦ͏ͳͬͨ࣌ʹαϙʔτ͋͑͠Δମ੍͕͋Δ͔ɺͦ͏͍͏ϝϯόʔ͕Կ໊͔͍Δ͔ʁ

ΞυϕϯτΧϨϯμʔاըߟҊ࣌ͷࢲ ͠Μ΍ ͷࢥߟճ࿏ ɾ ݄ࠒʙ ͋ʔͦΖͦΖΞυϕϯτΧϨϯμʔͷقઅ͔ɻ ɹࠓ೥͸ΈΜͳͰ΍Εͦ͏ͳྑ͛͞ͳاըɺԿ͔ͳ͍͔ͳʔ ɾ ݸू·Γͦ͏ͳɺݸߟ͑ΒΕͦ͏ͳςʔϚΛ୳͠͸͡ΊΔ
ɾ͓ɺ͜Ε͸ྑͦ͞͏ͳςʔϚݟ͔ͭͬͨͧɻఏҊˍ੠ֻ͚ͯ͠ΈΑ͏ ɾ ੠ֻ͚ͷ݁Ռ਺໊ީิ͕ڍ͕Δ ɹ͋Γ͕͍ͨɻ͜ΕͰ͋Δఔ౓اըͱͯ͠ߦ͚ͦ͏ʹͳ͖ͬͯͨͧ ɾ ੠ֻ͚Ͱू·ͬͨਓ਺͕গ͠଍Γͳ͔ͬͨ৔߹ ɹ΋͏গ͠ਓ਺ཉ͍͠ͳʜ࠶ืूͯ͠ΈΑ͏ɻ ɹࣥචωλαϙʔτ ͜Μͳωλ΍੾ΓޱͰॻ͚ͦ͏Ͱ͢Ͷɺͱ͔ ΋΍ΔΑɻ ɹू·ͬͯ͘Εͨϝϯόʔʹ΋ڠྗΛڼ͍ͰΈΔ͔ɻ ɾ ݄௚લ Α͠ʂاըͱͯ͠੒Γཱͪͦ͏ͳͷͰΞφ΢ϯε͠Α͏ɻ ɹ2JJUB"EWFOUBS౳ʹاըϖʔδ্ཱͪ͛ˍొ࿥ ɹ%FWFMPQFST*0Ͱࠂ஌ ɾ͋ͱ͸దٓঢ়گ֬ೝɻԿ͔͋ͬͨ࣌ͷαϙʔτ΋దٓ΍Δɻ ɾແࣄ׬૸ʂڠྗͯ͘͠ΕͨΈΜͳ͓ർΕ༷ˍ͋Γ͕ͱ͏ʂ

ΞυϕϯτΧϨϯμʔاը΁ͷࢀՃλΠϓ ࣾ֎ͷاըʹࢀՃ͠ɺຊͷΤϯτϦΛ ɹࣾ಺֎ͷϢʔβʔͱڞʹܨ͍Ͱ͍͘ ࣾ಺Ͱෳ਺ϝϯόʔΛूΊɺຊͷΤϯτϦΛ ɹͦͷෳ਺ϝϯόʔؒͰܨ͍Ͱ͍͘ɹ

ΞυϕϯτΧϨϯμʔاը΁ͷࢀՃλΠϓ ࣾ֎ͷاըʹࢀՃ͠ɺຊͷΤϯτϦΛ ɹࣾ಺֎ͷϢʔβʔͱڞʹܨ͍Ͱ͍͘ ࣾ಺Ͱෳ਺ϝϯόʔΛूΊɺຊͷΤϯτϦΛ ɹͦͷෳ਺ϝϯόʔؒͰܨ͍Ͱ͍͘ ҰਓͰຊͷΤϯτϦΛશͯॻ͖੾Δ
ɹ ͻͱΓΞυϕϯτΧϨϯμʔ

ΞυϕϯτΧϨϯμʔΛ ׬૸͢Δٕज़ ਫ ϒϩάษڧձ ΞϥΠΞϯεࣄۀ෦͠Μ΍ ͻͱΓ

ࣗݾ঺հ ͠Μ΍ shinyaa31 ɾ೥݄ɿΫϥεϝιουʹδϣΠϯ "84ίϯαϧςΟϯά෦ޙͷ"84ࣄۀຊ෦ ɾΫϥεϝιου೥໨ ɾ೥݄ݱࡏɿΞϥΠΞϯεࣄۀ෦ΤϯδχΞάϧʔϓϞμϯσʔλελοΫ .%4
νʔϜʹॴଐ ɹɾσʔλ෼ੳք۾ͷ͓࢓ࣄͨ͠ΓαʔϏεʹڵຯؔ৺͕͋ͬͨΓ͢ΔਓͰ͢ ɹɾ͓࢓ࣄͱͯ͠͸.%4ͷ֤छαʔϏε ECU 4OPX fl BLF -PPLFS౳ Λѻ͍ͬͯ·͢ ɾϒϩάपΓͷτϐοΫ ɹɾδϣΠϯҎདྷɺ೥࿈ଓ೥ؒຊ౤ߘܧଓத ɹɾ%FWFMPQFST*0্࢙ॳͷʮஶऀ୯ҐͰͷຊࣥචʯୡ੒ ɹɾ%FWFMPQFST*0Ͱͷϒϩάࣥචʹ͓͚Δ֤छܒൃɾܒ໤׆ಈΛ࣮ફத ɹɾࣾ಺ษڧձʮϒϩάษڧձʯΛاըˍओ࠵ ɹɾͻͱΓΞυϕϯτΧϨϯμʔʹνϟϨϯδ͕ͪ͠ ˞ৄࡉޙड़ https://dev.classmethod.jp/author/shinyaa31/

ͻͱΓΞυϕϯτΧϨϯμʔͱ͸ʁ ɾ*5ۀքʹ͓͚ΔΞυϕϯτΧϨϯμʔاըΛਓͰ΍Δ͜ͱ ɹ<௨ৗͷΞυϕϯτΧϨϯμʔ> ɹɹಛఆςʔϚͷϒϩάΛ೔ؒɺෳ਺ਓ਺ͷ౤ߘͰܨ͙ ɹ<ͻͱΓΞυϕϯτΧϨϯμʔ> ɹɹಛఆςʔϚͷϒϩάΛਓͰ೔ؒ΍Γ͖Δ ຊॻ͘ ɾແ๳ͱ͍͑͹ແ๳
ɾ಄͓͔͍͠ͱ͍͑͹಄͓͔͍͠ ɾੈͷதతʹ΋௅ΜͰ͍Δਓ͸ͪΒ΄ΒډΔ

<աڈ࣮ࢪ͞ΕͨΞυϕϯτΧϨϯμʔҰཡ >˞ΫϥεϝιουϝϯόʔͷΈͰߏ੒͞Εͨ΋ͷͷΈൈਮ Ϋϥεϝιουʹ͓͚ΔͻͱΓΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ ɾΫϥεϝιουΞυϕϯτΧϨϯμʔ ೥ ɾΞυϕϯτΧϨϯμʔ εϚϗ
ɾΞυϕϯτΧϨϯμʔɿ"84$MPVE'PSNBUJPOϏοάόϯςϯϓϨʔτ ೥ ɾ౎ݩͱֶͿ*P5ΞυϕϯτΧϨϯμʔͩͬͨ ౎ݩμΠεέ ɾ(VMQ4PMP"EWFOU$BMFOEBS ໺தཾҰ ɾ5BCMFBV4PGUXBSF5JQT7J["EWFOU$BMFOEBS ͠Μ΍ ೥ ɾ"84࠶ೖ໳ΞυϕϯτΧϨϯμʔ ɾΞυϕϯτΧϨϯμʔɿ"84ϞόΠϧ ೥ ɾਓͰ)BEPPQͷ࿩Λ͢Δ"EWFOU$BMFOEBS ͡ΐΜ͢Έ͢ ɾ-VJHJ"EWFOU$BMFOEBS ֿݪ༟ ɾ"NB[PO2VJDL4JHIU"EWFOU$BMFOEBS ͠Μ΍ ɾ"MUFSZY"EWFOU$BMFOEBS ೥ ɾΫϥεϝιουػցֶश"EWFOU$BMFOEBS ɾΫϥεϝιου5BCMFBV'VODUJPOT"EWFOU$BMFOEBS ͨ·ͪΌΜ ɾ4FSWFSMFTT"EWFOU$BMFOEBS ɾ"84SF*OWFOU৽αʔϏε঺հ"EWFOU$BMFOEBS ೥ ɾΫϥεϝιου"NB[PO4BHF.BLFS"EWFOU$BMFOEBS ɾ#PUP"EWFOU$BMFOEBS IBPZBZPJ ɾ"MUFSZY8FFLMZ$IBMMFOHF தڃϨϕϧ "EWFOU$BMFOEBS εζ ɾ"MUFSZY1SFEJDUJWF5PPMಓ৔"EWFOU$BMFOEBS ɾ"MUFSZYˍ5BCMFBV࿈ܞ"EWFOU$BMFOEBS ͠Μ΍ ೥ ɾػցֶशPO"84"EWFOU$BMFOEBS ɾ4OPX fl BLF"EWFOU$BMFOEBS ೥ ɾΫϥϝιϏΪφʔζͷѹ౗త੒௕"EWFOU$BMFOEBS ɾΫϥεϝιουY#JH2VFSZ"EWFOU$BMFOEBS ɾ"MUFSZY࠶ೖ໳"EWFOU$BMFOEBS ɾΠϯϑΥϚςΟΧ"EWFOU$BMFOEBS ɾΫϥεϝιουɿ$4ΞφϦςΟΫε"EWFOU$BMFOEBS ͠Μ΍

<աڈ࣮ࢪ͞ΕͨΞυϕϯτΧϨϯμʔҰཡ >˞ΫϥεϝιουϝϯόʔͷΈͰߏ੒͞Εͨ΋ͷͷΈൈਮ Ϋϥεϝιουʹ͓͚ΔͻͱΓΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ ɾΫϥεϝιου;FOEFTLೖ໳"EWFOU$BMFOEBS ɾ&NQMPZFF&YQFSJFODF"EWFOU$BMFOEBS ͯ͌ʔͼʔ
ɾ4OPX fl BLFΛΑΓ࢖͍͜ͳͦ͏ʂ"EWFOU$BMFOEBS ͕͞Β ɾΫϥεϝιου(PPHMF$MPVE"EWFOU$BMFOEBS ɾΞϊςʔγϣϯגࣜձࣾ"845FDIOJDBM4VQQPSU"EWFOU$BMFOEBS ɾܹ೤ʂ೔੡඼ʂ࠷ڧͷσʔλܥ4BB4͸ͲΕܾͩఆઓΞυϕϯτΧϨϯμʔ य़ా୓ւ ɾ$PDOWJNΛ৮ͬͯΈΑ͏"EWFOU$BMFOEBS ɾ%FWFMPQFST*0ஶऀͷΈΜͳʹ৭ʑฉ͍ͯΈͨ"EWFOU$BMFOEBS ͠Μ΍ ೥ ɾ4OPX fl BLFΛ΋ͬͱ࢖͍͜ͳͦ͏ʂ"EWFOU$BMFOEBS ͕͞Β ɾΞϊςʔγϣϯגࣜձࣾ"845FDIOJDBM4VQQPSU"EWFOU$BMFOEBS ɾ"MUFSZY4FSWFSΞυϕϯτΧϨϯμʔ εζ ɾ"NB[PO$POOFDUΞυϕϯτΧϨϯμʔ ɾΞϥΠΞϯε౷ׅ෦ΞυϕϯτΧϨϯμʔ ɾΫϥεϝιουػցֶशνʔϜΞυϕϯτΧϨϯμʔ

<Ϋϥεϝιουʹ͓͚ΔͻͱΓΞυϕϯτΧϨϯμʔ૸ഁճ਺ϥϯΩϯά> ɾճɿ ɹɾ͠Μ΍ ɾճɿ
ɹɾ͕͞Β ɹɾεζ ɹɾIBPZBZPJ ɾճɿ ɹɾͯ͌ʔͼʔ ɺय़ా୓ւ ɺͨ·ͪΌΜ ɹɹ͡ΐΜ͢Έ͢ ɺֿݪ༟ ɺ౎ݩμΠεέ ɺ໺தཾҰ Ϋϥεϝιουʹ͓͚ΔͻͱΓΞυϕϯτΧϨϯμʔͷྺ࢙

ͻͱΓΞυϕϯτΧϨϯμʔاըʹ௅ΉσϝϦοτ 💣༷ʑͳѹ ϓϨογϟʔ ͕ͭΒ͍ɺ͍ۤ͠ ɹɾ೔ؒͰຊΛࣗ෼ͻͱΓͰॻ͔ͳ͚Ε͹ͳΒͳ͍ ɹɾࣗ෼ͷ਎ʹԿ͔͋ͬͨΒاըͱͯ͠಴࠳ͯ͠͠·͏ ɹɾϦΧόϦʔ΋ࣗ෼ͰԿͱ͔͠ͳ͍ͱ͍͚ͳ͍ ɹɾʮͦͷ೔ͷ͏ͪʹ౤ߘΛ׬ྃͤ͞ͳ͚Ε͹ͳΒͳ͍ʯ͕೔ଓ͘ ɹɾʜͱ͍͏ͷΛۀ຿ͱฒߦͯ͠ߦΘͳ͚Ε͹ͳΒͳ͍
ɹ

ͻͱΓΞυϕϯτΧϨϯμʔاըʹ௅ΉϝϦοτ 🌟ຬ଍ײɺୡ੒ײΛಘΒΕΔ 🌟ࢌ͑ΒΕΔ 🌟zͦͷςʔϚʹৄ͍͠ਓzʹ୹࣌ؒͰͳΕΔ 🌟ࣾ಺֎΁ͷྑ͍ΞϐʔϧʹͳΔ 🌟ϒϩάͷମྗ ے೑ ͕࣮֬ʹಘΒΕΔ

ͻͱΓΞυϕϯτΧϨϯμʔاըΛz׬૸zͤ͞Δʹ͸ 🌟ݸ Ҏ্ ͷzاըΛ૸Γ੾ΔϒϩάωλzΛἧ͑Δ͜ͱ͕ग़དྷΔ͔ ɹɾ͜͜͸z௨ৗzͷΞυϕϯτΧϨϯμʔاըͱಉ͡ ɹɾωλͷऔΓճ͠ʹ͍ͭͯ͸ࣗ෼͚ͩͰ೗Կ༷ʹ΋ௐ੔ग़དྷΔͷͰͦ͜͸ؾָ͔΋͠Εͳ͍ 🌟ͻͱΓͰຊࣥච͢Δମྗͱ࣌ؒత༨༟ ɹɾ෺ྔ͚ͩͰݴ͑͹ʮຊʯ͸े෼ଟ͍ ɹɹɾຊॻ͖੾Δʹ͸ɺຊ͋ͨΓͲΕ͘Β͍ͷ࣌ؒͰॻ͚Δͷ͔ʁͱ͍͏ͷΛ೺Ѳ͓ͯ͘͜͠ͱ͕େࣄ
ɹɹɾຊ͋ͨΓͷࣥච࣌ؒ΍Ϧιʔε͕͋Δఔ౓೺Ѳग़དྷ͍ͯΕ͹ɺ͔ͦ͜Βٯࢉͯ͠ܭըཱ͕ͯΒΕΔ ɹɾʮϒϩάͷے೑ʯΛ஁͓͑ͯ͘ͷ͸ͱͯ΋େࣄ ɹɹɾৗ೔ࠒ͔ΒࣥචΛܧଓ͍ͯ͠Δͱݟੵ΋Γɺݟ௨͠͸ൺֱతཱͯ΍͍͢ ɹɾެ։ՄೳͳهࣄΛزΒ͔ετοΫग़དྷ͍ͯΔͱ৺ཧతʹ͸ָ ɹɹɾ౰೔ͷ͏ͪʹzͦͷ೔ͷຊzΛެ։ग़དྷΕ͹ ҰԠ 0,Ͱ͸͋Δ ɹɹɾ͚ͩͲ΋Կ͕͋Δ͔෼͔Βͳ͍ɻͦͷ࣌ͷͨΊʹ౤ߘՄೳͳهࣄͷετοΫ͸͋Δঢ়ଶʹ͓͖͍ͯͨ͠ 🌟zؾ߹zͱz׬૸͢Δͧzͱ͍͏ڧ͍ҙࢤ ɹɾ࠷ऴతʹ͸͜Εʹਚ͖Δ

͡ΐΜ͢Έ͢఻આ ೥ ɾ೥݄೔ɿΫϥεϝιουʹδϣΠϯ ɾཌ݄ ೥݄ ʹ͸ΞυϕϯτΧϨϯμʔͷ࣌ظ౸དྷ ɹɾࢲʮ͡ΐΜ͞ΜɺΞυϕϯτΧϨϯμʔ͍͔͕Ͱ͠ΐ͏ʁʯ ɹɾ͡ΐΜ͢Έ͢ʮ΍Γ·͠ΐ͏ʯɹ ɹɾࢲʮ͔ͤͬ͘ͳΒͻͱΓΞυϕϯτΧϨϯμʔͰʯ
ɹɾ͡ΐΜ͢Έ͢ʮͳΔ΄ͲͰ͢Ͷʯ ˣ ɾ݄ͷ͏ͪʹ΄΅ຊ ɹετοΫͱͯ͠ॻ͖੾Δ Hadoop Advent Calendar 2016 ͷهࣄҰཡ | DevelopersIO https://dev.classmethod.jp/referencecat/cm-advent-calendar-2016-hadoop/

ͻͱΓΞυϕϯτΧϨϯμʔاըߟҊ࣌ͷࢲ ͠Μ΍ ͷࢥߟճ࿏ ɾ ݄ʙळࠒ͘Β͍͔Βׂͱదٓ ΞυϕϯτΧϨϯμʔʹ࢖͑ͦ͏ͳωλͳ͍͔ͳʙ ɾ ݄ʙ݄ࠒ ܭըతͳέʔε
ɹɾ͜ͷςʔϚͰߦ͚ͦ͏ʂͰ΋৭ʑ४උ΍࢓ࠐΈ͕ඞཁͩͳʜ ɹɹগͣͭ͠ॻ͖ཷΊͯاըͱͯ͠࿅͓ͬͯ͜͏ɻ ɾ ݄ ಥൃతͳέʔε ɹɾΉΉͬʂ͜ͷλΠϛϯάͰ̋̋ͷ৽αʔϏε৽ػೳ͕ग़͔ͨʂ ɹɹɾ ͬ͟ͱ಺༰Λ೺Ѳ ͓ɺ͜Εͩͱݸ Ҏ্ ॻ͚Δωλ͕͋Γͦ͏ͩɻ ɹɹɹ͜ͷλΠϛϯάͰҰؾʹॻ͚͹̋̋ʹৄ͍͠ਓʹͳΕΔ͠ ɹɹɹ ࣾ಺֎ʹΞϐʔϧग़དྷΔ ͠ɺ΍ͬͯΈΔ͔ɻ ɹɹɹɾࣾ಺ʹࢍಉऀ͕͍ͦ͏ͳΒνʔϜͰ΍Δ΋ྑ͠ ɾ ݄ɿΞυϕϯτΧϨϯμʔࠂ஌લ ɹɾ ݕ౼ͷ݁Ռɺاըͱͯ͠੒Γཱͪͦ͏ߦ͚ͦ͏ͳ৔߹ ɹɹɾΑ͠ʂຊߦ͚ͦ͏ͳݟ௨ཱͬͨͧ͠ɻࠂ஌͠Α͏ɻ ɹɾ ݕ౼ͷ݁ՌɺϠόͦ͏ͳ৔߹ ɹɹɾ͏ʔΜɺͲ͏΍Βຊॻ͖੾Δͷ͸೉ͦ͠͏ͩͳʜɻ ɹɹɹ࢓ํͳ͍ɻී௨ʹγϦʔζاըͱͯ͠ެ։͢Δ͔ɻ ɾ ݄ ຖ೔౤ߘΛࢮक͢΂ࣥ͘චετοΫҡ࣋ͷͨΊʹຉ૸ɻԿ͔͋Ε͹ ؾ߹Ͱ Կͱ͔͢Δ ɾ ݄ ແࣄ૸ഁɿ͍΍ʔແࣄ׬૸ग़དྷͯྑ͔ͬͨɻ΋͏དྷ೥͸΍ΜͶ͐ͧ ͦͯ͠དྷ೥΁

ΞυϕϯτΧϨϯμʔاըɺੋඇࢀՃˍ࣮ફͯ͠ΈΑ͏ʂʂ ɾΞυϕϯτΧϨϯμʔاըɺ৭ʑେมͰ͸͋Δ ɾͰ΋νϟϨϯδͯ͠ΈΔ͜ͱͰݟ͑ͯ͘Δ΋ͷ͸͋Δ ɾ·ͣ͸ݸผʹԿ͔ͷاըʹࢀՃͯ͠ΈΑ͏ʂ ɾ׳Ε͖ͯͨΒاըΛ্ཱͪ͛ͯࡇΛ੝Γ্͛ͯΈΑ͏ʂ ɾʮ͜Μͳاը΍ͬͯΈΔͱ໘നͦ͏ʯ΋େ׻ܴɻ ɹྑ͍ײ͡ʹస͕ΔՄೳੑ΋͋ΔͷͰ·ͣ͸ڞ༗Λɻ ɾͻͱΓΞυϕϯτΧϨϯμʔɺ ɹ௅ઓ͍ͨ͠ਓ૬ஊʹ৐Γ·͢ɻ

アドベントカレンダーを完走する技術 / Techniques for completing an advent calendar

アドベントカレンダーを完走する技術 / Techniques for completing an advent calendar

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ΞυϕϯτΧϨϯμʔΛ ׬૸͢Δٕज़ ਫ ϒϩάษڧձ ΞϥΠΞϯεࣄۀ෦͠Μ΍

ࣗݾ঺հ ͠Μ΍ shinyaa31 ɾ೥݄ɿΫϥεϝιουʹδϣΠϯ "84ίϯαϧςΟϯά෦ޙͷ"84ࣄۀຊ෦ ɾΫϥεϝιου೥໨ ɾ೥݄ݱࡏɿΞϥΠΞϯεࣄۀ෦ΤϯδχΞάϧʔϓϞμϯσʔλελοΫ .%4

ΞυϕϯτΧϨϯμʔاը΁ͷࢀՃλΠϓ ࣾ֎ͷاըʹࢀՃ͠ɺຊͷΤϯτϦΛ ɹࣾ಺֎ͷϢʔβʔͱڞʹܨ͍Ͱ͍͘ ࣾ಺Ͱෳ਺ϝϯόʔΛूΊɺຊͷΤϯτϦΛ ɹͦͷෳ਺ϝϯόʔؒͰܨ͍Ͱ͍͘ɹ

Ϋϥεϝιουʹ͓͚ΔΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ΫϥεϝιουͷϝϯόʔͷΈͰߏ੒͞Εͨ اը͕͓ͦΒ͘࠷ॳͱࢥΘΕΔ ΞυϕϯτΧϨϯμʔͷهࣄҰཡc%FWFMPQFST*0 IUUQTEFWDMBTTNFUIPEKQSFGFSFODFDBUBEWFOUDBMFOEBS

<աڈ࣮ࢪ͞ΕͨΞυϕϯτΧϨϯμʔҰཡ >˞ΫϥεϝιουϝϯόʔͷΈͰߏ੒͞Εͨ΋ͷͷΈൈਮ Ϋϥεϝιουʹ͓͚ΔΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ ɾΫϥεϝιουΞυϕϯτΧϨϯμʔ ೥ ɾΞυϕϯτΧϨϯμʔ εϚϗ

<աڈ࣮ࢪ͞ΕͨΞυϕϯτΧϨϯμʔҰཡ >˞ΫϥεϝιουϝϯόʔͷΈͰߏ੒͞Εͨ΋ͷͷΈൈਮ Ϋϥεϝιουʹ͓͚ΔΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ ɾΫϥεϝιου;FOEFTLೖ໳"EWFOU$BMFOEBS ɾ&NQMPZFF&YQFSJFODF"EWFOU$BMFOEBS ɾ4OPX fl

ΞυϕϯτΧϨϯμʔاըΛz׬૸zͤ͞Δʹ͸ 🌟ݸ Ҏ্ ͷzاըΛ૸Γ੾ΔϒϩάωλzΛἧ͑Δ͜ͱ͕ग़དྷΔ͔ ɹɾʮԿ͔ॻ͘ʯͰຊἧ͑Δ ἧ͏ͷΛظ଴͢Δ ͸݁ߏແ๳ ɹɾಛఆͷςʔϚͰݸҎ্ωλ͕͋Γͦ͏ ݟ͚ͭΒΕͦ͏

ΞυϕϯτΧϨϯμʔاըߟҊ࣌ͷࢲ ͠Μ΍ ͷࢥߟճ࿏ ɾ ݄ࠒʙ ͋ʔͦΖͦΖΞυϕϯτΧϨϯμʔͷقઅ͔ɻ ɹࠓ೥͸ΈΜͳͰ΍Εͦ͏ͳྑ͛͞ͳاըɺԿ͔ͳ͍͔ͳʔ ɾ ݸू·Γͦ͏ͳɺݸߟ͑ΒΕͦ͏ͳςʔϚΛ୳͠͸͡ΊΔ

ΞυϕϯτΧϨϯμʔاը΁ͷࢀՃλΠϓ ࣾ֎ͷاըʹࢀՃ͠ɺຊͷΤϯτϦΛ ɹࣾ಺֎ͷϢʔβʔͱڞʹܨ͍Ͱ͍͘ ࣾ಺Ͱෳ਺ϝϯόʔΛूΊɺຊͷΤϯτϦΛ ɹͦͷෳ਺ϝϯόʔؒͰܨ͍Ͱ͍͘ɹ

ΞυϕϯτΧϨϯμʔاը΁ͷࢀՃλΠϓ ࣾ֎ͷاըʹࢀՃ͠ɺຊͷΤϯτϦΛ ɹࣾ಺֎ͷϢʔβʔͱڞʹܨ͍Ͱ͍͘ ࣾ಺Ͱෳ਺ϝϯόʔΛूΊɺຊͷΤϯτϦΛ ɹͦͷෳ਺ϝϯόʔؒͰܨ͍Ͱ͍͘ ҰਓͰຊͷΤϯτϦΛશͯॻ͖੾Δ

ΞυϕϯτΧϨϯμʔΛ ׬૸͢Δٕज़ ਫ ϒϩάษڧձ ΞϥΠΞϯεࣄۀ෦͠Μ΍ ͻͱΓ

ࣗݾ঺հ ͠Μ΍ shinyaa31 ɾ೥݄ɿΫϥεϝιουʹδϣΠϯ "84ίϯαϧςΟϯά෦ޙͷ"84ࣄۀຊ෦ ɾΫϥεϝιου೥໨ ɾ೥݄ݱࡏɿΞϥΠΞϯεࣄۀ෦ΤϯδχΞάϧʔϓϞμϯσʔλελοΫ .%4

ͻͱΓΞυϕϯτΧϨϯμʔͱ͸ʁ ɾ*5ۀքʹ͓͚ΔΞυϕϯτΧϨϯμʔاըΛਓͰ΍Δ͜ͱ ɹ<௨ৗͷΞυϕϯτΧϨϯμʔ> ɹɹಛఆςʔϚͷϒϩάΛ೔ؒɺෳ਺ਓ਺ͷ౤ߘͰܨ͙ ɹ<ͻͱΓΞυϕϯτΧϨϯμʔ> ɹɹಛఆςʔϚͷϒϩάΛਓͰ೔ؒ΍Γ͖Δ ຊॻ͘ ɾແ๳ͱ͍͑͹ແ๳

<աڈ࣮ࢪ͞ΕͨΞυϕϯτΧϨϯμʔҰཡ >˞ΫϥεϝιουϝϯόʔͷΈͰߏ੒͞Εͨ΋ͷͷΈൈਮ Ϋϥεϝιουʹ͓͚ΔͻͱΓΞυϕϯτΧϨϯμʔͷྺ࢙ ೥ ɾΫϥεϝιουΞυϕϯτΧϨϯμʔ ೥ ɾΞυϕϯτΧϨϯμʔ εϚϗ

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<Ϋϥεϝιουʹ͓͚ΔͻͱΓΞυϕϯτΧϨϯμʔ૸ഁճ਺ϥϯΩϯά> ɾճɿ ɹɾ͠Μ΍ ɾճɿ

ͻͱΓΞυϕϯτΧϨϯμʔاըʹ௅ΉϝϦοτ 🌟ຬ଍ײɺୡ੒ײΛಘΒΕΔ 🌟ࢌ͑ΒΕΔ 🌟zͦͷςʔϚʹৄ͍͠ਓzʹ୹࣌ؒͰͳΕΔ 🌟ࣾ಺֎΁ͷྑ͍ΞϐʔϧʹͳΔ 🌟ϒϩάͷମྗ ے೑ ͕࣮֬ʹಘΒΕΔ

͡ΐΜ͢Έ͢఻આ ೥ ɾ೥݄೔ɿΫϥεϝιουʹδϣΠϯ ɾཌ݄ ೥݄ ʹ͸ΞυϕϯτΧϨϯμʔͷ࣌ظ౸དྷ ɹɾࢲʮ͡ΐΜ͞ΜɺΞυϕϯτΧϨϯμʔ͍͔͕Ͱ͠ΐ͏ʁʯ ɹɾ͡ΐΜ͢Έ͢ʮ΍Γ·͠ΐ͏ʯɹ ɹɾࢲʮ͔ͤͬ͘ͳΒͻͱΓΞυϕϯτΧϨϯμʔͰʯ

ͻͱΓΞυϕϯτΧϨϯμʔاըߟҊ࣌ͷࢲ ͠Μ΍ ͷࢥߟճ࿏ ɾ ݄ʙळࠒ͘Β͍͔Βׂͱదٓ ΞυϕϯτΧϨϯμʔʹ࢖͑ͦ͏ͳωλͳ͍͔ͳʙ ɾ ݄ʙ݄ࠒ ܭըతͳέʔε