Carving the Way to Ruby Engineering

by Koichi ITO

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3VCZϓϩάϥϛϯάεΫʔϧ ͔Βͷ࠾༻ͱҭ੒ Carving the Way to Ruby Engineering ҏ౻ߒҰ&4. *OD 3VCZ8PSME$POGFSFODF ໦ ౡࠜݝཱ࢈ۀަྲྀձؗʮ͘ʹͼ͖ϝοηʯ

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@koic w044ϓϩάϥϚʔ w3VCP$PQίΞνʔϜίϛολʔ wגࣜձࣾӬ࿨γεςϜϚωδϝϯτ &4. *OD ΤϯδχΞϦϯάϚωʔδϟʔ σΟεςΟϯάΠογϡυɾΤϯδχΞ

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࠾༻ͱಇ͖ํͷଟ༷Խ wਓੜͷঢ়گʹ͋Θͤͨ ϥΠϑελΠϧΛଚॏ͢Δ wؔ౦ݍɺ෱Ҫɺ࣎լɺ ࿨Վࢁɺౡࠜɺٶ࡚͔Βͷ ϦϞʔτϫʔΫ 🗾

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w த్ *5اۀ͔Β w த్ εΫʔϧܦ༝ w ৽ଔ w ໿͕εΫʔϧग़਎ऀ w εΫʔϧ͔Βݩܯ࡯׭ɺ्ҩɺڭࢣͳͲଟ༷ ࢲͨͪͷ૊৫΁ͷೖࣾܦ࿏

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ࠓ೔ͷ࿩

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☝ 3VCZ͕ଟ༷ͳݱ࣮ੈք΁ͷద߹ͱਁಁ͍ͯͨ͘͠Ίͷ׆ಈঢ়گΛ͖࣋ͬͯ·ͨ͠ IUUQTSVCZXPSMEDPOGPSHKBBCPVU

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εΫʔϧ͔Βͷ࠾༻ͱҭ੒Ϟσϧ 5SBJOJOH (SBEVBUJOH "QQSFOUJDJOH $BUBMZ[JOH 1SF&OHJOFFS 5SBOTJUJPOBM $IBOHF PS/PU (3085) 1SBHNBUJD4LJMMT (3085) 3VCZ'VOEBNFOUBMT (FUUJOH4UBSUFE School-to-Work Model *OTQJSFECZIUUQTXXXNBSUJOGPXMFSDPNBSUJDMFTBHJMF'MVFODZIUNM

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ಛఆͷεΫʔϧʹدΒͳ͍࿩ʁ 3VCZCJ[(SBOEQSJYΫϦΤΠςΟϒ৆ͷड৆͓ΊͰͱ͏͍͟͝·͢ʂ

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ϑϥΫλϧίϛϡχςΟ ࠾༻ͱ͍͏໊ͷ௨աӺ ҭ੒͸؀ڥͮ͘Γ ໨࣍

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ϑϥΫλϧίϛϡχςΟ

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w 3VCZJTUʹ͸Ұछͷຽ଒తͳՁ஋؍΍श׳͕ ͋ΔԾઆ w ϓϩάϥϛϯάݴޠΛֶͿ͚ͩͰ͸ͳ͘ɺ ϓϩάϥϛϯάݴޠΛ࢖ͬͯΔίϛϡχςΟ Ͱͷઃܭͷྑ͠ѱ͠΁ͷՁ஋؍΍ৼΔ෣͍ํ Λ஌͍ͬͯ͘ ݴޠίϛϡχςΟΛ஌Δ

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w զʑ3VCZJTU͸ɺ3VCZͱ͍͏ݴޠͱ3BJMTͱ ͍͏%4-Λ฼ࠃޠͱͨ͠ର࿩Λߦ͏ w 3VCZ΍3BJMTΒ͍͠ ΋͘͠͸Β͘͠ͳ͍ ίʔυͷڞ௨ೝ͕ࣝͲ͏΋3VCZJTUʹ͸͋Δ w ʮݴޠ͸ࢥߟΛنఆ͢ΔʯαϐΞʹ΢Υʔϑ ͷԾઆɺ͋Δ͍͸ʮόϕϧʯ ฼ࠃޠͷډ৺஍ͷྑ͞

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7MBEJNJS%FNFOUZFWTBZT 0QFOJOH,FZOPUFPG,BJHJPO3BJMT

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w ίʔυϦʔσΟϯά͸࡞ऀ͕఻͍͑ͨ͜ͱΛ ίʔυ͔ΒಡΈऔͬͯߟ͑Δ࡞ۀ w ݹయจֶ΍๏཯ͷઐ໳ՈͷΑ͏ʹɺ3VCZJTU ͸3VCZͱ3BJMTͷղऍΛॏͶ͍ͯ͘ w ౰ॳ෼͔Βͳ͔ͬͨ3VCZ3BJMTઐ໳Ոಉ࢜ͷ ٞ࿦͕ঃʑʹΘ͔ΔΑ͏ʹͳͬͯ͘Δ ࡞ऀͷؾ࣋ͪΛߟ͑ ଓ͚ Α

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εΫʔϧͱ͍͏ίϛϡχςΟͷೖΓޱ 3BJMTʹ΋ͨΒ͞Εͨ ʮઃఆΑΓن໿ʯ ͸ɺεΫʔϧं͔྆ Βاۀं྆ؒ΁ͷ ৐ंํ๏ͷલఏͷ෯ Λ޿͍͛ͯΔʁ IUUQTKQRVPSBDPN3VCZʹͱܾͬͯఆతʹ଍Γͳ͍΋ͷ͸Կͩͱࢥ͍·͔͢

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εΫʔϧ͸ اۀʹଓ͘໳

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w Կेਓن໛Ͱ࠾༻Ͱ͖ΔେاۀͰͳ͍Զͨͪ w ϓϩάϥϛϯάະܦݧऀΛूஂڭࣨࢦಋ͢Δ ઐ໳ՈͰ͸ͳ͘ɺεΫʔϧͱ͍͏ઐ໳ۀऀ΁ w 3VCZεΫʔϧʹ͓͚Δ3VCZίϛϡχςΟͷ ܗ੒͸ɺΦʔϓϯͳ3VCZίϛϡχςΟͱ஍ܨ ͕ΓͰ͋Γɺಉ͡ࢹ఺ͷ஥ؒͷू·Γ͸ॏཁ ࠾༻ͱ͍͏௨աӺ·Ͱͷҭ੒

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w 3VCZΛओྗʹ࠾༻͍ͯ͠Δاۀ͸ɺ3VCZͬ Ά͍ਓͨͪͰߏ੒͞Εͯ͘Δʁ w ҰํͰɺ૊৫ʹΑͬͯՁ஋؍΍େ੾ʹ͍ͯ͠ Δ΋ͷʹର͢ΔΧϥʔ͕͋Δ w ૊৫ಛੑ΁ͷϚονϯάͰߟ͑ͯΈΔ ͓ޓ͍ʹͲΜͳਓ ͨͪ ͱ࢓ࣄΛ͍ͨ͠ʁ ద ߹ ੑ ॏ ཁ

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ͲΜͳਓ͕ͨͪ จԽΛ࡞ͬͯ ͍Δ૊৫ʹ ࢀՃ͍ͨ͠ʁ ࠾༻ଆ͸จԽΛൃ৴ͯ͠ɺԠืଆ͸ࣗ෼ʹ͍͋ͦ͏ͳจԽΛ୳ͤΔͱྑ͍ͷ͔ͳ

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w 3VCZJT"HJMFCZ.BU[ w ֯୩͞Μ͕ฐࣾӡӦΠϕϯτͰاըͨ͠ओ୊ 3VCZJTUΛड͚ೖΕΔاۀจԽΛৢ͢ IUUQTPCKFDUDMVCKQFWFOUDISJTUNBTTDIFEVMF

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૊৫จԽ ίϛϡχςΟ ͱͷϚονϯά΁ͷߟ࡯ ब৬͸Ԡืऀͱ࠾༻اۀͷϚονϯάͰɺ૊৫ΛίϛϡχςΟͱͯ͠ଊ͑ͯΈΔ

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ͲΜͳਓͨͪͱಇ͖͍ͨʁ ͋Δ͍͸ ͲΜͳਓΛड͚ೖΕ͍ͨʁ

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w ৴པͰ͖Δਓ͔Βͷڑ཭ w ৴པͰ͖Δਓ͕৴པͰ͖Δͱݴ͍ͬͯΔਓ w ϦϑΝϨϯενΣοΫ͸ͻͱͭͷखஈͳ͕Β ৴པͰ͖Δے͔Βͷ৘ใ͕Ұ൪ͷ৴པݩ ࠾༻Λതଧʹ͠ͳ͍EFHSFFO ͭ·ΓίϛϡχςΟͰͷϨϐϡςʔγϣϯ͸ͱͯ΋ॏཁ

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w ɹʮொా઎͍ʯͱ͍͏ίϛϡχςΟదੑ਍அ w اۀͱੜెͦΕͧΕΛ஌͍ͬͯΔͷͰɺ૬ੑ Λߟ͑Δ͜ͱ͕Ͱ͖Δ w εΫʔϧίϛϡχςΟͰɺਓͱاۀͷίϛϡ χςΟจԽΛ஌Δ஁࿉͕͞Ε͍ͯΔͷͰ͸ʁ ίϛϡχςΟ͔ΒίϛϡχςΟ΁ 3VCZίϛϡχςΟ͸ʮ࿡࣍ͷִͨΓʯͳΒ͵.BU[ͱࡾ࣍ͷִͨΓͰܨ͕Γͦ͏

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IUUQBHJMFFTNDPKQEPDTCVTJOFTT@QMBO@FTN@BHJMF@EJW@UIQEG ੜଶܥʹͱͬͯεΫʔϧίϛϡχςΟͷॏཁੑ޲্ 3VCZίϛϡχςΟ͸ʮ࿡࣍ͷִͨΓʯͳΒ͵.BU[ͱࡾ࣍ͷִͨΓͰܨ͕Γͦ͏ ໳ͱͳΔ 3VCZίϛϡχςΟ

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࠾༻ͱ͍͏໊ͷ௨աӺ

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w ࠾༻ޙ΋ϦϞʔτϫʔΫͷͨΊɺ࠾༻໘઀΋ ϦϞʔτͷίϛϡχέʔγϣϯͰߦ͍ͬͯΔ w ͦͷ໘઀ͷ৔ͷઌͷɺݱ৔ϝϯόʔͱͷ࢓ࣄ Λݟӽͨ͠ࢹ఺Ͱߦ͍ͬͯΔ ࠾༻ٕज़໘઀

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w γϣʔτΞϯαʔͱͯ͠͸ͦ͏Ͱ΋ͳ͍ w ΋ͪΖΜ໰୊Λղ͚Δʹӽͨ͜͠ͱ͸ͳ͍ ͕ɺ໰୊Λ௨ͯ͠ίϛϡχέʔγϣϯ໘ͷ ؍࡯Λॏࢹ͍ͯ͠Δ w ٕज़తͳ෦෼͸ॏཁ͕ͩɺ͍·͍Δಉ྅ͨͪ ͱ΍͍͚ͬͯͦ͏͔͕΋ͬͱॏཁ ໰୊͕ղ͚ͳ͚Ε͹/( 🧐

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ٕज़໘઀Ͱ $PQJMPU͸0,

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w γϣʔτΞϯαʔͱͯ͠͸໰୊ͳ͍ w ͳͥͳΒίʔυิ׬͢Δͷ͸/(Ͱ͸ͳ͍ͷ ͱಉ͡Ͱɺ༏लͳίʔυิ׬ͱࢥ͑͹ྑ͍ w Ή͠Ζ৽͍࣌͠୅ͷΤϯδχΞͷൃ૝ྗͰ"* ΛͲ͜·Ͱ׆༻Ͱ͖Δ͔͸ڵຯ͕͋Δ ৽͍࣌͠୅ͷߟ͑ํʹ͋ΘͤΔ ·ͣ͸ࣗ෼ͷதʹߟ͑Λݟ͚ͭΔ࢟੎͕͋Δ͔ɻ"*͸ͦ͜΁ͷরձͱݟ͍ͯΔɻ

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w ࣗ෼͋Δ͍͸"*Ͱॻ͍͍ͯΔίʔυʹର͠ ͯɺΤϥʔ͕ى͖ͨ࣌ͷσόοά w ϝιου΍ม਺΁ͷΑΓྑ໊͍લ෇͚ w ෼͔Βͳ͍͜ͱΛݴޠԽͯ͠఻͑ΒΕΔٕज़ w ໰୊ʹର͢Δཁ݅ͷ࿙Ε΁ͷࢦఠ େࣄͳͷ͸"*͔Βઌͷ͜ͱ

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ࣗΒͷٕज़ʹؔ৺Λ࣋ͭ͜ͱ ͋ͳͨͷ࢓ࣄʹ͍ͭͯߟ͑Δ͜ͱʂ ܅͸ֶͿ͜ͱ͕৺͔Β޷͖ͩ ܅͸ιϑτ΢ΣΞͷ͜ͱΛେ੾ʹࢥ͍ͬͯΔ ΞδϟΠϧαϜϥΠ +POBUIBO3BTNVTTPO ୡਓϓϩάϥϚʔ %BWJE5IPNBT "OESFX)VOU ιϑτ΢ΣΞ։ൃ޷͖Ͱ͔͢ʁ

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ҭ੒͸؀ڥͮ͘Γ

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KPLFS΍UBHPNPSJTϨϕϧͷ ੌ࿹Λ࠾༻͢Δͷ͸೉͍͕͠ɺ࣍୅Λ ୲͏ੌ࿹ʹ੒௕͍͚ͯ͠Δ؀ڥΛ੔͑Δ ౒ྗ͸Ͱ͖Δ͸ͣ

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εΩϧ͸਎ʹ͚͍͚ͭͯ͹ྑ͍ ֶΜͰ͍࢟͘੎΍ਓؒੑ͕େࣄ ͍·͋ΔεΩϧΑΓ΋࢟੎ !DPMPSCPYTBZT

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w ͻͱΓͻͱΓʹ޲͔͍߹ͬͨ৘ใ͕େࣄ w ຊਓͷݴ༿Λಘ͍ͯͳ͍૝૾͸౎߹ͷྑ͍ ظ଴͕ڧ͘ɺͦΕ͸ԟʑʹͯ͠ϋζϨ͏Δ ϨϕϧΞοϓ͢Δͷ͸ΤϯδχΞຊਓ

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w ΤϯδχΞجૅٕज़शಘࢧԉ w ϝϯλʔ੍౓ w ࣾ಺ಡॻձɺษڧձɺݚڀ෦ w ϦϞʔτϫʔΫ։ൃ੔උิॿ w ೔ใจԽ ࣄۀͰߦ͑Δͷ͸؀ڥͮ͘Γ ͜ΕΒ͸ࢪࡦͷ͏ͪελʔλʔΩοτͬΆ͍΋ͷͰ͢

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w ೖ͖ࣾͯͨ͠ϝϯόʔͷഎܠ͸·ͪ·ͪ w ৬ۀ͕ҧ͏͕લ৬Ͱ-JOVYͷݚम͕͋Δͳ ͲɺεΫʔϧҎલ͔ΒͷೃછΈͷ༗ແ w ೔ใ΍POͳͲ͔Βۀ຿਱ߦʹෆ଍ͯ͠ ͍ΔͱࢥΘΕΔ஌ࣝεϙοτΛߟ͍͑ͯ͘ ΤϯδχΞجૅٕज़शಘࢧԉ ౰વɺ஌͍ͬͯΔ͜ͱͱͰ͖Δ͜ͱ͸ҟͳΔ͕ɺ஌Βͳ͍໰୊͸஌ࣝͰղܾͰ͖Δ

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w ࢿ֨ࢼݧ͸஌ࣝͷମܥతशಘʹΑ͘Ͱ͖͍ͯΔ 3VCZೝఆٕज़ऀ ৘ใٕज़ऀࢼݧ -JOV$ͳͲ w ࢿ֨औಘ͸໨తͰ͸ͳ͘ɺۀ຿਱ߦʹඞཁͳ ஌ࣝΛମܥతʹ֫ಘ͢Δͷ͕໨త w ࢿ֨औಘ͸෭࡞༻͕ͩɺࢿ֨ࢼݧʹ߹࣮֨͠੷ ղআ͢Ε͹خ͍͠ͷ͕ਓ৘ ໨ඪ͸ਓؒͷϞνϕʔγϣϯʹͳΔ

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w ݱ৔ͷ֎͔Βͩͱந৅తͳҰൠղͷఏҊ͸ ҰൠղͷҬΛ௒͑ͮΒ͍ʁ w ॏཁͳͷ͸࣮։ൃݱ৔ʹ͓͚ΔίϯςΩετ Ͱ౰ਓͷ໰୊Λ೺ѲͰ͖ΔཱͪҐஔͷਓɻ ͦͷͨΊʹ͸ɺݱ৔ͷਓ͕ݟΔͷ͕΋ͬͱ΋ ֬౓͕ߴ͍ ϝϯλʔ໾͸ಛघղͷ೺Ѳ͕ॏཁ

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౎ࢢ͸πϦʔͰ͸ͳ͍ IUUQTXXXBNB[PODPKQEQ9

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πϦʔߏ଄ ηϛϥςΟεߏ଄ ϝϯςΟʔʹԠͯ͡ɺଟ໘తʹݟΕΔΑ͏POମ੍ΛಈతʹऔΕΔΏͱΓॏཁ ϨϙʔτϥΠϯͷPOͷΈͩͱ ϥΠϯͷ৘ใ͕શͯʹͳͬͯ͠·͏ ඞཁͳϖΞͰͷPOͷػձΛ૿΍͠ ͲͷΑ͏ͳαϙʔτ͕Ͱ͖Δ͔ݕ౼Մ ҭ੒POϞσϧ΋πϦʔͰ͸ͳ͍

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w ަྲྀͷೱ୶Ͱ͍͏ͱɺಉ͡ϓϩδΣΫτͷϝ ϯόʔͱͷަྲྀ͕ѹ౗తʹೱ͘ͳΓ͕ͪ ͦΕ͸ͦ͏ w ϓϩδΣΫτΛԣஅͨ͠ަྲྀػձ͸͋Δఔ౓ ҙਤతʹ࡞Βͳ͍ͱɺಛʹ৽نࢀըͷ ϝϯόʔ͸઀఺Λ࡞ΔϙΠϯτΛಘͮΒ͍ ࣾ಺ಡॻձɺษڧձɺݚڀ෦

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w ΍ͬͯΈ͍ͨ࢓ࣄ಺༰΍ٕज़ͷࢦ޲ੑͳͲΛ ฉ͍ͯͲΜͳํ޲ʹϨϕϧΞοϓ͍͖ͯͨ͠ ͍͔Λ۷Γग़͍ͯ͘͠ w ͍·ͷϓϩδΣΫτΛΑΓྑ͘͢ΔΞϓϩʔ ν΍ɺϚον͢ΔผϓϩδΣΫτ΁ͷҾӽ͠ ͳͲɺθωϥϧϚωʔδϟʔͱϓϩδΣΫτ ϚοϓͰݕ౼͢Δ 8JUIPVU1SBDUJDF /P&NFSHFODF मͤ͟Ε͹ݱΘΕͣ

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೔ใ ೔ใ͸ൺֱతܗ͔Β࢝ΊΒΕΔ ;Γ͔͑Γ ேձɾ༦ձ $* ϦϑΝΫλϦϯά ϖΞϓϩάϥϛϯά Ϟϒϓϩάϥϛϯά ΠϯΫϦϝϯλϧͳઃܭ ϓϥϯχϯά 5%% ఆ࣌Πϕϯτͱͯ࢝͠ΊΒΕΔ PO ೔ใʹ͍ͭͯৄ͘͠͸੿࡞ʰϕςϥϯͦ͜೔ใΛॻ͜͏ʱΛ͝ࢀর͍ͩ͘͞ ೔ใ ٕೳͷशಘʹ͕࣌ؒඞཁ

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ୈষ l࣌Λ௒͑ͨ ϓϩάϥϛϯάͷಓz IUUQXXXBNB[PODPKQEQ

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l πʔϧ΍ٕ๏͸Կ౓΋มԽ͢Δ͕ɺ େ͖͘มԽ͢ΔΘ͚Ͱ͸ͳ͍ɻҰํɺ ਓ͸Ώͬ͘Γͱ͕ͩɺਂ͘มԽ͢Δɻ ,FOU#FDL

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%BWF5IPNBTTBZT IUUQTXXXZPVUVCFDPNXBUDI W&$'(C+9Z* w 3VCZ,BJHJͰ ʮ৽͍͠ਓͨͪΛܴ ͑ೖΕΔࢧ౓Λ͠Α ͏ʯͱএ͑Δ w ݱ୅͸ͦͷ೥ޙ w ࢧ౓ͷ͋ͱ

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l ϓϩάϥϛϯάεΫʔϧͰͷίϛϡχςΟ΍ब৬ઌͷ૊৫ίϛϡχςΟʹ΋ݴ͑ͦ͏ &4. *OD$&0ฏು݈ࣇ ͻͱΓͻͱΓͷਓͱͯ͠ͷؔ܎͸ ϓϩδΣΫτظؒΑΓ΋௕͘ଓ͘