Ruby Is Nice so We Are Nice

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RUBY IS NICE SO WE ARE NICE ֯୩৴ଠ࿠ !LBLVUBOJ   3VCZ8PSME$POGFSFODFجௐߨԋ

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.BU[JTOJDFTPXFBSFOJDF

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XF3VCZJTUɻ3VCZJTU ͱ͸ɺl3VCZʹରͯ͠ ୯ͳΔ͓٬͞ΜҎ্ͷ ؾ࣋Λ͍࣋ͬͯΔਓz

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ࣗ෼Ҏ֎Ͱ3VCZΛ࢖͍ͬͯΔ ਓͷ͜ͱ͕ؾʹͳͬͯߦಈͯ͠ ͍Δ͋ͳͨ͸͔ͳΓ3VCZJTUͷ ૉཆ͕͋Γ·͢ɻ͍·ͷٕज़Ϩ ϕϧ΍஌ࣝ͸ؔ܎ͳ͍ΜͰ͢ɻ

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Α͏ͦ͜

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.BU[JTOJDFTPXFBSFOJDF

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3VCZJTOJDFTPXFBSFOJDF

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.BU[͕φΠεͳͷ͸Θ͔ Δ .BU[ౕ͍͍ ɻ͔͠͠ 3VCZ͕φΠεͱ͸ʜ ࡢ ೔ͷجௐߨԋΛώϯτʹ ߟ͑ͯΈ·͠ΐ͏ʜ

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l3VCZz͸ϓϩάϥϛϯάݴޠͩ ͚ʹݶΒͳ͍ɻϥΠϒϥϦ΍ϑ ϨʔϜϫʔΫɺπʔϧ΍ΞϓϦ έʔγϣϯʜΈΜͳͷ࣋ͪدͬ ͨl࢖͏ਓʹͱͬͯͷྑ͍ײ͡z ͷશମɺͦΕ͕3VCZͷφΠεɻ

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ΈΜͳ͕3VCZʹ࣋ͪدͬͨ੒Ռ͕φ Πε͔ͩΒࢲͨͪ3VCZJTU΋φΠεͰ ͍Α͏ʜ͋Ε ੒ՌΛ࣋ͪد͍ͬͯ Δͷ͸3VCZJTUͰ͸ 3VCZJTUͷ੒Ռ ͕φΠε͔ͩΒ3VCZJTU͸φΠε 3VCZJTU͕φΠε͔ͩΒ3VCZ͕φΠ εʹͳΔ ແݶϧʔϓ͔ͳ

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3VCZͷφΠε͞͸ɺ3VCZJTU ͷ࣋ͪدͬͨl͍͍ײ͡zͷશ ମͱͯ͠ɺ3VCZJTU͕ҭ͍ͯͯ ͘ɺͱ͍͏ಈతͰࣗݾݴٴత ͳऴΘΓͷఆ·Βͳ͍׆ಈʹɻ

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3VCZ,BJHJͷ.BU[ͷ جௐߨԋ͸l.BU[JTOJDFz͔ Βl3VCZJTOJDFz΁ͱ͍͏ ͷ͕࣮ࡍʹ͸ͲΜͳ෩ܠͳͷ ͔Λ঺հͯ͘͠Ε͍ͯ·͢ɻ

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ʜͱ͸͍͑ɺͦΕ͸͜ͷ࿭੕Ͱ ࠷ڧΫϥεͷ΢σϚΤͷεΰΠ ڃϋοΧʔͷ࿩͡ΌΜͶʜͱ͍ ͏ؾ࣋ͪ͸Θ͔Δɻ3VCZJTUʹ ٕज़ͷϨϕϧ͸ؔ܎ͳ͍ɺͱ͍ͬ ͯ΋ٕज़ͷ෼໺ͷ࿩ͩ͠Ͷʜɻ

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3VCZJTOJDFTPXFBSFOJDF

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೥Ҏ߱ ͜ͷ೥ؒ ʹɺ 3VCZΛۀ຿Ͱ࢖͍࢝Ίͨɺlී ௨ͷzϓϩάϥϚʔͷΈͳ͞Μ ʹ΍ͬͯ΋Β͑Δͱ͍͍Μ͡Ό ͳ͍͔ͳͱࢥ͍ͬͯΔ͜ͱ

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೔தʹɺ͓ޓ͍ʹܟҙΛ ΋ͬͯ཰௚ʹɺ࢓ࣄʹؔ Θ͍ͬͯΔlؾ࣋ͪzΛ࿩ ͢ػձΛܧଓతʹ࣋ͱ͏

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lඇެࣜzͰ͍͍ɻ΍Γํ΋ͲͷΑ͏ͳ ΋ͷͰ΋ߏΘͳ͍ɻ·ͣ͸෼͔Β Ͱ΋ɻl;Γ͔͑ΓzɺPOɺࡶஊɺ ໘ஊɺϥϯνʜɻϓϩάϥϚʔಉ࢜Ͱ ࢝Ίͯ΋͍͍͠ɺ ࣗ෼ͨͪͰखԠ͑ Λײͨ͡Γɺඞཁͦ͏ͳΒ ϓϩάϥ ϚʔͰดͣ͡ʹ΍ΕͨΒ͍͍͘͢͝ɻ

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3VCZ͸ίϯϐϡʔλʔʹ࢓ࣄ Λͤ͞ΔͨΊͷϓϩάϥϛϯά ݴޠͰ͋Δͱಉ࣌ʹɺϓϩάϥ Ϛʔʹϓϩάϥϛϯά͕lͨͷ ͍͠zͱ͍͏ؾ࣋ͪΛ఻͑Δlݴ ޠzͰ΋͋Δ ͍͢͝

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ૹΓख͕ײ͍ͯ͡Δؾ࣋ ͪΛड͚खͷ৺ʹ࠶ݱ͞ ͤΔͨΊͷݴޠͷ࢖͍ํ ͸lࢻzͱݺ΂ΔͷͰ͸   ϙΤϜ

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3VCZ͕ϓϩάϥϛϯάݴޠΛ ϝσΟΞͱͯ͠ײ৘Λಧ͚͍ͯ ΔΑ͏ʹɺl࢓ࣄzΛϝσΟΞͱ ͯ͠ײ৘Λಧ͚ΒΕ͍ͯΔ͔   ϙΤϜͱͯ͠ͷ࢓ࣄ

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Ͱ͖͍ͯΔͰ͖͍ͯ ͳ͍ɺڧ͍ऑ͍ɺࣗ ৴͕͋Δෆ҆ͩɺ೰Μ Ͱ͍Δ΋΍΋΍͢Δ

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3VCZΛ࢖ͬͯۀ຿΍ࣄۀΛ͓͜ ͳ͏ػձ͸ͱͯ΋ͱͯ΋૿͑·͠ ͨ Α͍͜ͱ ɻ͔͠͠ɺ3VCZͷ Α͏ʹφΠεͳײ৘Λ࢓ࣄΛ௨͡ ͯಧ͚͍ͯΔ৬৔͸ಉ͚ͩ͡͸૿ ͑ͯ͸͍ͳ͍ɺͱײ͍ͯ͡Δɻ

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ͩͬͯ·͋೉͍͠ ͔ΒͶ

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3VCZ͸ίϯϐϡʔςΟϯάύϫʔ ͷ૿େͱΠϯλʔωοτͷීٴ ͷաఔͰੜ·Εҭͬͨɺࣗ༝ͳɺ ࣗવͷɺ໺ੜͷιϑτ΢ΣΞ  3VCZ͸ϋοΧʔୡ͕ͭͬͨ͘

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lϏδωεzͱͯ͠ͷιϑτ ΢ΣΞͮ͘Γ͸Ͳ͏ͯ͠΋ ਓ޻తͳ؀ڥʹͳΓ͕ͪɻ ๻ΒϋοΧʔ͡Όͳ͍͠ʜ ળѱͷ໰୊Ͱ͸ͳ͍ ɻ

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໺ੜͷιϑτ΢ΣΞͰ͋ Δ3VCZͷφΠε͞Λਓ޻ తͳ؀ڥͰ͋ΔϏδωε ͷੈքͰϋοΧʔͳΒ͵ զʑ͕l࠶ݱz͢Δํ๏

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ͦ͜ͰΞδϟΠϧ ϦʔϯͰ͢Α

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“ ” ϋοΧʔͱΞδϟΠϧ "What!?! That's obvious!" closely followed by "But Fowler explains it better than Unix traditions do..." ,$#) *%'+ )BDLJOHBOE3FGBDUPSJOHCZ&SJD43BZNPOE IUUQXXXBSUJNBDPNXFCMPHTWJFXQPTUKTQ UISFBE

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The New Methodology  ৽͍͠ํ๏࿦ • Adaptive > Predictive ࣄલͷਫ਼౓ΑΓ΋ݱ࣮΁ͷదԠΛ • People > Process “ਓؒ”͸ιϑτ΢ΣΞ։ൃͷ࠷ॏཁίϯϙʔωϯτ • Self-Adaptive Process ϓϩηε͸ϑΟʔυόοΫΛ௨ͯ͡ҭͭ https://www.martinfowler.com/articles/newMethodology.html

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ྫ͑͹4DSVNͱ͍͏ΞδϟΠ ϧͳ࢓ࣄͷਐΊํͷϑϨʔϜϫʔ Ϋ͕͋Δɻ͜ΕΛφΠεΛಧ͚ ΔϝσΟΞͱͯ͠ϙΤϜԽ͢Δ  ಁ໌ੑ ݕࠪ దԠ

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ྫ͑͹-&"/ΤϯλʔϓϥΠζͱ͍͏૖ େͳߏ૝͕͋ΔɻlϛογϣϯίϚϯυz ͱlվળͷܕzΛφΠεΛಧ͚ΔϝσΟ Ξͱͯ͠ϙΤϜԽ͢Δ  λʔήοτঢ়ଶɺ໨తɺ࠷খݶͷ੍໿

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3VCZΛ࢖ͬͯlͨͷ͍͠zͱײ ͡ΒΕͨͱ͖ͷड͚खͱͯ͠ͷ ؾ࣋ͪΛɺࣗ෼͕࢓ࣄͷૹΓख ͱͳͬͨͱ͖ʹɺͦΕΛड͚ख ͷ৺ʹl࠶ݱz͢Δ͜ͱʹ͚ۙͮ ͍ͯΔͩΖ͏͔

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3VCZͷφΠεΛಧ͚Δ ϝσΟΞͱͯ͠ϙΤϜԽ ͢Δͱ͍͏؍఺͔Βઌୡ ͷݴ༿ΛோΊͯΈΑ͏

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lࣃंͷͭʹͳͬͨਓؒ͸ɺ ࢓ࣄΛָ͘͠Ͱ͖ͳ͍ɻ࢓ࣄ ָ͕͘͠ͳΔͷ͸ɺ࢓ࣄͷશ ମ૾͕೺ѲͰ͖ɺ࢓ࣄશମͷ ࣭ʹ੹೚Λ࣋ͭ৔߹Ͱ͋Δɻ ΫϦετϑΝʔɾΞϨάβϯμʔʰύλϯɾϥϯήʔδʱ

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lʮָ͠͞ʯʹ΋ϏδωεՁ ஋͕͋Γ·݁͢ہɺϞν ϕʔγϣϯ͕ͦ͜ϓϩάϥϚ ͷੜ࢈ੑΛࠨӈ͢ΔͷͰ͢ɻ ϚʔςΟϯɾϑΝ΢ϥʔʮμΠφϛοΫλΠϐϯάʯ http://bliki-ja.github.io/DynamicTyping/

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http://modernagile.org/

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!LBLVUBOJ

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3VCZJTUJTUɻ 3VCZJTU͕޷͖ɻ

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Ұൠࣾஂ๏ਓ೔ຊ3VCZͷձͷཧࣄɻ ૲ͷࠜͷ೔ຊͷ3VCZJTUͷ׆ಈʹ๏ਓ ֨Λ༩͍͑ͯΔɻ3VCZϦϑΝϨϯε ϚχϡΞϧ 3VCZJTU.BHB[JOF 3VCZ,BJHJ ஍Ҭ3VCZձٞ 3BJMT(JSMT+BQBOͳͲͷ׆ಈΛࢧԉ ͢ΔࣄۀΛ͓͜ͳ͍ͬͯ·͢ɻ

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3VCZΞιγΤʔγϣϯ͸Ұൠ ࡒஂ๏ਓɻࡒʹ๏ਓ֨Λ༩͑ͯɺ ͓ۚʹ͍͍ײ͡ʹಇ͍ͯ΋Βͬ ͯ3VCZͷීٴͱൃలͷͨΊͷ ࣄۀΛ΍͍ͬͯͯ͢͝  ݸਓͷݟղͰ͢ ɻ

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3VCZͷφΠε͞͸ɺ3VCZJTU ͷ࣋ͪدͬͨl͍͍ײ͡zͷશ ମͱͯ͠ɺ3VCZJTU͕ҭ͍ͯͯ ͘ɺͱ͍͏ಈతͰࣗݾݴٴత ͳऴΘΓͷఆ·Βͳ͍׆ಈʹɻ

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3VCZ͕ϓϩάϥϛϯάݴޠΛ ϝσΟΞͱͯ͠ײ৘Λಧ͚͍ͯ ΔΑ͏ʹɺl࢓ࣄzΛϝσΟΞͱ ͯ͠ײ৘Λಧ͚ΒΕ͍ͯΔ͔   ϙΤϜͱͯ͠ͷ࢓ࣄ

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೔தʹɺ͓ޓ͍ʹܟҙΛ ΋ͬͯ཰௚ʹɺ࢓ࣄʹؔ Θ͍ͬͯΔlؾ࣋ͪzΛ࿩ ͢ػձΛܧଓతʹ࣋ͱ͏

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͍·ɺͰ͖ΔΞδϟΠϧ ֯੐య https://www.slideshare.net/kdmsnr/20130808agilesapporo Further Reading https://www.slideshare.net/takahashim/how-to-become-a-rubyist 3VCZJTUೖ໳೥൛ ߴڮ੐ٛ http://rubyonrails.org/doctrine/ 5IF3BJMT%PDUSJOF %))

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RUBY IS NICE SO WE ARE NICE ֯୩৴ଠ࿠ !LBLVUBOJ   3VCZ8PSME$POGFSFODFجௐߨԋ