エンジニアとしてこの先生きのこるために

by Recruit Technologies

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࿨ా୎ਓ "QS !ϦΫϧʔτςΫϊϩδʔζ ΤϯδχΞͱͯ͠ ͜ͷઌੜ͖ͷ͜ΔͨΊʹ

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࿨ా୎ਓ JEUXBEB !U@XBEB HJUIVCUXBEB

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ひとり歩きするスタンド ελϯυ໊ϫΠϧυɾαόϯφ

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ࣗݾ঺հ ໊લ࿨ా୎ਓ Θͩͨ͘ͱ IBUFOBUXBEB 5XJUUFS!U@XBEB ϝʔϧUBLVUPXBEB!HNBJMDPN λϫʔζŋΫΤετגࣜձࣾ  औక໾ࣾ௕

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HJIZPKQͷ࿈ࡌ ʰʦಈըͰղઆʧ࿨ా୎ਓͷlςετۦಈ։ൃzߨ࠲ʱ IUUQHJIZPKQEFWTFSJBMUEE શճ͢΂ͯಈը෇͖ղઆ χίχίಈըͰ΋ݟΕ·͢ 8%#աڈهࣄͷಛઃαΠτͱಈը΋

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assert(typeof item.id === 'strong') | | | | | | | false | | "foo" | Item{id:"foo",name:"bar"} "string" --- [string] 'strong' +++ [string] typeof item.id @@ -1,6 +1,6 @@ str -o +i ng I am the author of power-assert-js power-assert

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Do you write tests?

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wେֶࡏֶத͔ΒઃܭͱϓϩάϥϛϯάͷΞϧόΠτ Λ࢝ΊΔ wଔۀޙϓϩάϥϚͱͯ͠ͷΩϟϦΞΛ։࢝ wిࢠ੓෎ͷαϒϓϩδΣΫτ ਺ઍਓن໛ ͰϦʔυ ϓϩάϥϚ w91ͷίʔνͱͯ͠ਓͷΞδϟΠϧνʔϜʹࢀՃ wߨԋɺࣥචɺ044׆ಈΛ࢝ΊΔ wݱࡏ͸ʮྲྀ͠ͷϖΞϓϩۀʯΛߦ͍ͬͯΔ ΩϟϦΞతͳ΋ͷ

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ΑΖ͓͘͠ئ͍͠·͢

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ֶͼଓ͚Δ࢟੎

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lৗʹ͋ͳͨͷ ஌ࣝϙʔτϑΥϦΦ ʹ౤ࢿ͢Δ͜ͱz

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ٕज़ΛֶͿͷͰ ͸ͳ͘ɺٕज़ͷ ֶͼํΛֶͿ

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l࢛൒ظຖʹ ٕज़ॻΛಡΉz

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感覚記憶 0.5 〜 2sec 短期記憶 15 〜 30 sec 長期記憶死ぬまで? ֶͼͷ࢓૊Έ

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೴಺ΠϯσοΫεΛ࡞Δ ピッカーを育てる = 反復練習何度も長期記憶から出し入れする荷物を他の荷物とくっつける連想記憶を育てる

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1999 2000 2001 2002 2003 2004 2005 2006 taken from http://recompile.net/archives/51148851.html ͨͱ͑͹ɺ࣌ܥྻʹฒ΂Δ

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lखΛಈ͔͠ ֶͯͿz

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Ͱ͖Δ ޷͖ʹͳΔ ΍Δ

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σʔϧͷԁਲ਼

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ࣸܦ

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IUUQUXJUUFSDPNU@XBEBTUBUVTFT

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lຖ೥গͳ͘ͱ΋ ҰͭͷݴޠΛ ֶश͢Δz

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http://www.thoughtworks.com/radar/languages-and-frameworks

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lӳޠ͕Ͱ͖ΔΑ͏ʹͳΔͱ͍͏ͷ͸ɺ ʮେ͖ͳਤॻؗͷݤʯΛ౉͞ΕΔΑ͏ͳ ΋ͷͰ͢ɻҰਓͻͱΓͷਓੜʹ͍ΖΜͳ ՄೳੑΛ༩͑ͯ͘Ε·͢z ߴদचࢠ http://blogos.com/article/85541/ ٕज़ऀͱӳޠʹ͍ͭͯ

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਎ͷճΓΛ ϓϩάϥϛϯά ର৅ʹ͢Δ

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ϓϩάϥϚ޲͚ͷຊͷ؂मऀ͸ Ͳ͏͋Δ΂͖͔

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ϓϩάϥϚΒ͘͠ ଵଦɺၗຫɺ୹ؾ ϓϨʔϯςΩετΛ޷Ή ͢΂ͯΛόʔδϣϯ؅ཧ͢Δ ͢΂ͯΛࣗಈԽ͢Δ มԽΛ๊༴͢Δ

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ϓϩάϥϚΒ͘͠ ݪߘ͸NBSLEPXOܗࣜ ݪจ͸εΫϨΠϐϯάͯ͠औಘ HJUΛ࢖͍όʔδϣϯ؅ཧ IFSPLVʹQVTIͯ͠αΠτʹ൓ө ؂मࠩ෼͸EPDEJGGͰදࣔ

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Ξ΢τϓο τΛߦ͏

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σʔϧͷԁਲ਼

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Πϯϓοτ Ξ΢τϓοτ ਖ਼ͷϑΟʔυόοΫϧʔϓ

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ྔ͸࣭ʹసԽ͢Δ http://d.hatena.ne.jp/KZR/20080808/p1

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w5XJUUFS wCMPH 2JJUB౳ wࡶࢽهࣄ 8FC ࢴഔମ ిࢠഔମ wॻ੶ ڞஶ ຋༁ ؂༁ ୯ஶ wߨԋ ࣾ಺ษڧձ ࣾ֎-5 ࣾ֎ߨԋ wϥΠϒίʔσΟϯά w(JUIVC Ξ΢τϓοτͷνϟωϧ

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CMPHΛॻ͘

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l৘ใൃ৴ɺCMPH ൃ ද ެ։ͳͲ͸ɺ਺ֶͷ ະղܾ໰୊ͷ ূ໌Ͱ ͸ͳ͘ɺྉཧͷΑ͏ͳ ΋ͷz

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ίʔυΛެ։͢Δ

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ൃද͢Δ Ͱ͖Ε͹ϥΠϒίʔσΟϯά

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ࣥච͢Δ ·ͣ͸ࡶࢽ͔Β

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JOUFSWBM

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ݱ໾ϓϩάϥϚ Ͱ͍ΔͨΊʹ

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ຖ೔ίʔυΛ ॻ͘

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w K2VFSZ࡞ऀ+PIO3FTJH͸ि຤ʹࣗ෼ͷϓϩ μΫτ։ൃΛؤுΖ͏ͱ͕ͨ͠ɺࣦഊɻ w ฏ೔ͱಉ͡അྗͰ͸ॻ͚ͳ͍ w શͯͷि຤͕ۭ͍͍ͯΔΘ͚Ͱ͸ͳ͍ w Ұिؒ ͋Δ͍͸ೋिؒ ͸௕͍ɻίʔυ Λ๨Εͯ͠·͏ w ͦ͜Ͱ+PIO3FTJH͕ߦͬͨ͜ͱ͸ʜʜ ͋ͷ+PIO3FTJHͰ΋͏·͍͔͘ͳ͍͜ͱ

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IUUQFKPIOPSHCMPHXSJUFDPEFFWFSZEBZ

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ຖ೔ίʔυΛॻ͘͜ͱɻϒϩάɺυΩϡϝϯ τɺͦͷଞ͸ίʔυΛॻ͍ͨΒ΍ͬͯΑ͍ɻ ҙຯͷ͋ΔίʔυΛॻ͘͜ͱɻΠϯσϯτ ΍ϑΥʔϚοτͷमਖ਼ɺՄೳͳΒ͹ϦϑΝΫ λϦϯά΋ίʔυॻ͖ʹ͸Χ΢ϯτ͠ͳ͍ɻ ਂ໷࣌લʹऴΘΒͤΔ͜ͱɻ ॻ͍ͨίʔυΛHJUIVCͰશͯ044ʹ͢Δ ͜ͱɻ ࢛ͭͷϧʔϧ IUUQFKPIOPSHCMPHXSJUFDPEFFWFSZEBZ

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ݱࡏͷ!KFSFTJHͷHJUIVCQSPpMF IUUQTHJUIVCDPNKFSFTJH

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w ඞཁ࠷খݶͷίʔυ΁ͷूதҰ೔෼ʙ࣌ؒఔ౓Ͱҙ ຯͷ͋ΔίʔυΛॻ͘͜ͱ͕ڧ͍ΒΕΔ ٳ೔ʹ͸΋ͬͱ ͔͚ΒΕΔ w ϓϩάϥϛϯάͷश׳ԽHJUIVCʹ૲Λੜ΍͢ͷ͕໨తͰ ͸ͳ͍ɻࣗ෼Ͱࣗ෼ࣗ਎ͷͨΊʹੜ׆श׳Λม͑Δͷ͕େ ࣄ w ෆ҆ͱͷઓ͍Ҏલ͸ʮे෼ʹʯਐΜͰ͍Δ͔ɺʮे෼ ʹʯ׬੒͍ͯ͠Δ͔ɺෆ͕҆͋ͬͨɻຖ೔ίʔυΛॻ͍ͯ ΈͯɺਐΜͰ͍Δͱ͍͏࣮ײ͸ɺ࣮ࡍͷਐḿͱಉ͘͡Β͍ ॏཁͩͱ͍͏ؾ͖ͮΛಘͨ +PIO3FTJHʹىͬͨ͜มԽ

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w ि຤ͷա͔ͨ͝͠Ҏલ͸։ൃͷશͯΛि຤ʹṌ͚ࣦͯ ഊ͍͕ͯͨ͠ɺ͍·΍ि຤͸ͦΕ΄ͲॏཁͰͳ͘ͳΓɺ ϦΞϧϥΠϑΛॆ࣮Ͱ͖ΔΑ͏ʹͳͬͨ w όοΫάϥ΢ϯυॲཧࢄาதɺγϟϫʔதɺৗʹίʔ υͷ͜ͱΛόοΫάϥ΢ϯυͰߟ͑ΔΑ͏ʹͳΓɺྑ ͍ΞΠσΞ͕ු͔ͿΑ͏ʹͳͬͨ w ίϯςΫετεΠονҎલ͸िʹҰճͷ։ൃͩͬͨͷ ͰίϯςΫετεΠονͷίετ͕͕͋ͬͨɺ͍·͸ ຖ೔ͳͷͰͦΕ͕ͳ͍ +PIO3FTJHʹىͬͨ͜มԽ

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w ϫʔΫϥΠϑόϥϯε࢓ࣄੜ׆ࣗ෼ͷϓϩδΣΫτ ͷόϥϯεͷऔΓํ͕෼͔ͬͨͷ͕࠷େͷऩ֭ͩͬͨɻ ຖ೔΍Δͱ͍͏͜ͱ͸ɺόϥϯεΛऔΔͱ͍͏͜ͱ w ·ΘΓ͔Βͷཧղʮຖ೔ίʔυΛॻ͘ʯͱ͍͏श׳Λ ެݴͨ͜͠ͱͰɺύʔτφʔ͔Βͷཧղ΋ಘΒΕΔΑ ͏ʹͳͬͨ w ͲΕ͚ͩίʔυΛॻ͍͔ͨ͜ͷश׳Λଓ͚Δͱॻ͘ ίʔυ΍Ξ΢τϓοτ͸ࣗ෼Ͱ΋֮͑ΒΕͳ͍͘Β͍ ͷྔʹͳΓɺॆ࣮ײΛಘΒΕΔ +PIO3FTJHʹىͬͨ͜มԽ

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ࢲ΋νϟϨϯδதͰ͢

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ॅΉ৔ॴΛ޻෉͢Δ

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ҙਤతʹΦϑϥΠϯ࣌ؒΛͭ͘Δ

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೥Լ͔Β ֶͿ

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lҰੜϓϩάϥϚʔͰ͍ ΕΔ͔Ͳ͏͔͸ɺݴ͍ ׵͑Ε͹೥Լ͔Βֶ΂ Δ͔൱͔ɻz

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ੜ·Ε ఆ೥ࡁ

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ੈ୅ ੈ୅ ੈ୅

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Ͱ͖Δ ޷͖ʹͳΔ ա৒ద߹ͱλίπϘԽ

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wఆظతʹࣗ෼ͷεΩϧΛ୨Է͢͠Δ wੵۃతʹ֎෦ʹग़ͯɺࣗ෼ͷεΩϧΛ ૬ରԽ͢Δ w࢖͏ಓ۩Λఆظతʹม͑Δ wະ஌ͷίϛϡχςΟʹࢀՃ͢Δ wएऀ͔ΒֶͿ wएऀͱಉ͡౔ඨͰڝ͏ ϕϯνϚʔΫͱΞϯϥʔχϯά

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աڈ͔Β ະདྷΛ஌Δ

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ٕज़͸ʮৼΓࢠʯ

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ٕज़͸ʮΒͤΜʯ

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ʮ5ࣈܕʯͰ͸ͳ͘ෳ਺ͷபΛ

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ਓͷͭ͘Δ ӔΛݟΔ

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૊৫ͷ࣌୅͔Βݸਓͷ࣌୅΁

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ݸ͕ଟ͘ू·ΔͱԿ͔͕ى͜Δ

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ϩʔυϚοϓࢦ޲͔ΒΤίγεςϜࢦ޲΁

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IUUQEIBUFOBOFKQFTTBQ

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l͔͠͠ɺࠓͷۀք͸ɺʮΤίγεςϜʯͷ࣌୅ͩɻ ೤ଳӍྛͷΑ͏ʹɺ৯͍͍͋ͭͭڞੜ͋͠͏͞·͟ͳ λΠϓͷϓϨΠϠʔ͕ɺࣗ෼ͷҝ͚ͩͷݸผͷҙࢥܾ ఆΛͯ͠ɺͦͷ૬ޓ࡞༻Ͱٕज़͕ൃల͍ͯ͘͠ɻʮΤ ίγεςϜʯ͸ໃ६ͩΒ͚Ͱɺ͋Δٕज़͕ൃల͢Δͷ ͱಉ࣌ʹɺͦͷΞϯνςʔθͱͳΔٕज़΋৳ͼΔz lʮϩʔυϚοϓʯ͕ࢦࣔ͢͠ະདྷͷํ޲ͱҧ͏ํ޲ ʹਐΉ͜ͱ͸க໋తͳؒҧ͍͕ͩɺʮΤίγεςϜʯ ͸Ή͠Ζத৺෦͕ϨουΦʔγϟϯͰɺपล෦ʹੜ͖ ࢒Γ͕༰қͳϒϧʔΦʔγϟϯ͕͋Δz IUUQEIBUFOBOFKQFTTBQ

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lී௨ͷਓ͸ʮϩʔυϚοϓʯ ͷதͰ͸ਅΜதΛਐΉ΂͖Ͱɺ ʮΤίγεςϜʯͷதͰ͸ਅΜ தΛආ͚Δ΂͖ͩz IUUQEIBUFOBOFKQFTTBQ