大規模開発に打ち勝つためのマルチパラダイム / Beat with multi paradigms

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େن໛։ൃʹଧͪউͭͨΊͷ  ϚϧνύϥμΠϜ +VO OHKBQBO !PLVOPLFOUBSP

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୭ w Ԟ໺ݡଠ࿠!PLVOPLFOUBSP w גࣜձࣾϐΫηϧάϦ ο υ w OHKBQBO

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$PEF(SJE ϑϩϯτΤϯυʹؔΘΔਓʑͷΨΠυ ֹ݄ԁʢ੫ࠐԁʣ  ΫϨδοτΧʔυɺ1BZ1BMͰͷ͓ࢧ෷͍ͷ৔߹͸೔ؒͷແྉߪಡظؒ

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ࣥච IUUQTCPPLJNQSFTTDPKQCPPLT

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͋Β͢͡

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͜͜·Ͱͷ͋Β͢͡ IUUQTTQFBLFSEFDLDPNPLVOPLFOUBSP

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ݱࡏͷঢ়گ w ૯ߦ਺໿ ߦ ʢۭߦɺ ςε τίʔ υؚΉʣ w ૯ϑΝΠϧ਺ ϑΝΠϧ ʢςε τؚΉʣ w ։ൃମ੍ w ϑϩϯ τΤϯ υ ɾ ΤϯδχΞਓ

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೔ʑɺ ໰୊͕෾ग़ w ઃܭ͸Ͳ͏͢Δ͔ w ίʔ υͷॏෳ͕සൟʹੜ·ΕΔ໰୊͸Ͳ͏͢Δ͔ w ͦͯ͠Կ౓΋มΘΔ࢓༷ॻʜ

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໰୊ղܾͷࠔ೉͞ w ͋ΒΏΔঢ়گΛ৐Γӽ͑Δਖ਼ղ͸ɺ ͻͱͭͰ͸ͳ͍ w ਖ਼ղ͕ݟ͔ͭΒͳ͍͜ͱ͢Β͋Δ w ίʔ υΛॻ࣌ؒ͘Α Γɺ ܾஅʹඅ΍͕࣌ؒ͢ଟ͍೔΋͋Δ w ܾஅ͕ɺ ൒೥ޙͷޙչΛট͘ ͜ͱ΋͋Δ

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Ҿ͖ग़͠Λଟ࣋ͭ͘ wʮલʹಡΜͩ͋ͷຊͰ͸ʙʯ wʮ͋ͷਓ͕࿩͍ͯͨ͠ͷ͸ʙʯ wʮ࠷ۙ؍ͨΧϯϑΝϨϯεͩͱʙʯ

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ϓϩάϥϛϯά ɾ ύϥμΠϜ

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w ϓϩάϥ ϛϯάʹ͓͚Δ఩ֶͷ֓೦ɺ ղऍΛҙຯ͢Δ w खଓ͖ܕϓϩάϥ ϛϯά w ΦϒδΣΫ τࢦ޲ϓϩάϥ ϛϯά w ؔ਺ܕϓϩάϥ ϛϯά ϓϩάϥϛϯά ɾ ύϥμΠϜ

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w ࣌୅ͷਐߦ w ٕज़ͷਐาɺ ٕज़త੍໿͔Βͷղ์ w ੓࣏తͳࣄ৘ w աڈͷผݴޠͷ൓লͱվળ ͳͥݴޠ͸ෳ਺͋Δͷ͔

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w +BWB4DSJQU w खଓ͖ܕɺ ΦϒδΣΫ τࢦ޲ͳͲ w 5ZQF4DSJQU w ؔ਺ܕɺ δΣωϦ οΫͳͲ ͋ͳͨͷಘҙͱ͢Δݴޠ͸ ʁ

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w ύϥμΠϜ͸࣍ʑ ͱฤΈग़͞ΕΔ w ࣗ෼ͷۀ຿্ѻ͍ͬͯΔݴޠͷΈ͔͠৮͍ͬͯͳ͍ͱɺ   ৽͍͠ύϥμΠϜʹ৮ΕΔػձ͕ͳ͍ w ੵۃతʹଞͷύϥμΠϜʹ৮ΕͯΈΔ w ໰୊ղܾͷҾ͖ग़͠Λ޿͛Δ ෆ׳ΕͳύϥμΠϜʹ৮ΕΔ

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ϚϧνύϥμΠϜΛऔΓೖΕ࣮ͨྫ

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w ֮͑ͨύϥμΠϜΛҋӢʹೖΕͳ͍ w खஈͷ໨తԽ͸ආ͚Δ w ΤϯδχΞͷࣗݾຬ଍ʹͯ͠͸ͳΒͳ͍ w ࠓճ͸ϚϧνύϥμΠϜʹ͢΂͖ͱड़΂͍ͨΘ͚Ͱ͸ͳ͍ w ໰୊ղܾʹ޲͚ͨൃ૝Λॊೈʹ͢ΔͨΊͷΤΫααΠζͰ͋Δͱଊ͑Δ w έʔεόΠέʔεͰͷۛຯ͕ඞཁ ஫ҙ

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w ܖ໿ʹΑΔઃܭɺ %FTJHOCZ$POUSBDU %C$ͱ΋ w ͋Δϝ ιο υΛݺͿͱ͖ɺ ݺͿଆͰอূ͢΂͖ෆม৚݅ɺ ࣄલ৚͕݅ຬͨ͞ΕΔ w Ͱ͋Ε͹ w ͦͷϝ ιο υͷऴྃ࣌ʹอূ͢΂͖ෆม৚݅ɺ ࣄޙ৚͕݅ຬͨ͞ΕΔ w ࣮૷ͷޡΓͳͷ͔ɺ ϝ ιο υΛ࢖͏ଆͷޡΓ͔ΛϋοΩ Ϧͤ͞Δ ܖ໿ϓϩάϥϛϯά

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w console.assert() + unassert΍JOWBSJBOU͕Φεεϝ  `npm i invariant` w ಋೖ؆୯ w ܖ໿ϓϩάϥ ϛϯάͷ׬શ࠶ݱ͸Ͱ͖ͳ͍͕  ʮ࣮૷ͷޡΓͳͷ͔ɺ ϝ ιο υΛ࢖͏ଆͷޡΓ͔ΛϋοΩ Ϧͤ͞Δʯ   Λڗड͢ΔͨΊͷΞϓϩʔν w +BWB4DSJQU։ൃʹ͓͍ͯ͸๷ޚతϓϩάϥ ϛϯάɺ ૣظϦλʔϯͳͲ΋  ஌ࣝͱͯ͠༗༻ "OHVMBSͳΒ͹

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w ԣஅతؔ৺ࣄ ʢΞεϖΫ τʣ Λڞ௨Խ࣮ͯ͠ߦ͢ΔͨΊͷϓϩάϥ ϛϯάख๏ w ༗໊ͳྫͱͯ͠͸ϩάग़ྗ w ͋ΒΏΔϞδϡʔϧɺ ͋ΒΏΔϝ ιο υͰϩάͷग़ྗ͸༗༻ w ͨͩ͠ɺ ͦΕΒ͢΂ͯʹϩάग़ྗ༻ͷίʔ υ͕ॻ͔Ε͍ͯͨΒ  ຊ౰ʹॏཁͳॲཧΛࣔ͢ίʔ υ͕ຒ΋Εͯ͠· ͏ w ෭࣍తͳॲཧԣஅతؔ৺ࣄΛ෼཭͠ຒ΋Εͳ͍Α ͏ʹ͢Δख๏ ΞεϖΫ τࢦ޲ϓϩάϥϛϯά

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w "OHVMBS։ൃऀʹ͸͓ͳ͡Έɺ %FDPSBUPSΛ࢖͏ w Ϋϥε໊΍ϝ ιο υ໊ͷ্ʹ%FDPSBUPSͱͯ͠෼཭ͨؔ͠਺Λهड़ wʮϩάΛग़ྗͤΑʯ ͱ͍͏ॲཧ͸%FDPSBUPS಺෦ʹӅṭͭͭ͠ϩάग़ྗΛୡ੒ w %FDPSBUPSॲཧ಺Ͱ͸  1SPYZύλʔϯ (P' ΍Ϧ ϑ ϨΫγϣϯ ɾ ϓϩάϥ ϛϯάͳͲͷख๏͕༗༻ w ௐࢠʹ৐ͬͯ΍Γ͗͢Δͱͨͩͷ೉ಡԽ "OHVMBSͳΒ͹

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࣮Ҋ݅Ͱͷྫ @KukerComponent() @Component({ selector: 'app-foo-bar', templateUrl: './component.html', styleUrls: ['./component.scss'], }) export class FooBarComponent { // ... } IUUQTHJUIVCDPNLSBTJNJSLVLFS

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w ෭࡞༻Λ༻͍ͣʹҾ਺ ʢೖྗʣ ͱ໭Γ஋ ʢग़ྗʣ Λ΋ͬͨؔ਺Λ  ͍ͭ͘΋૊Έ߹ΘͤΔ͜ͱͰॲཧΛ࣮ݱ͢Δख๏ w +BWB4DSJQU͸ɺ ୈҰڃؔ਺Λѻ͑ΔͷͰ࠶ݱ͠΍͍͢ w ؔ਺Λ͍ͭ͘΋૊Έ߹ΘͤΔͱ͍͏఺Ͱ͸3Y+4Ͱ΋͓ͳ͡Έ w ͪͳΈʹ3Y+4͸ϦΞΫςΟ ϒϓϩάϥ ϛϯάɺ એݴܕϓϩάϥ ϛϯά  ͳͲͷύϥμΠϜͷ࣮ݱͰ͋Γɺ ؔ਺ܕϓϩάϥ ϛϯάͰ͸ͳ͍ ؔ਺ܕϓϩάϥϛϯά

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w ܕΛύϥϝʔλͱͯ͠ѻ͏ ͜ͱͰɺ ಛఆͷܕʹґଘ͠ͳ͍࣮૷͕ՄೳʹͳΔ  ϓϩάϥ ϛϯάख๏ w 5ZQF4DSJQUʹ͓͍ͯ͸Array΍PromiseͳΒ͹ຖ೔࢖͍ͬͯΔ͸ͣ δΣωϦ οΫ ɾ ϓϩάϥϛϯά

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w 0QUJPO΍&JUIFSͱ͍ͬͨؔ਺ܕݴޠ )BTLFMM 4DBMBͳͲ ͷٕज़Λഈआ w 0QUJPOͱ͸ ʮ஋͕͋Δ͔ແ͍͔Λද͢ܕʯ w &JUIFSͱ͸ ʮͭͷ͏ ͪͲͪΒ͔Λද͢ܕʯ ؔ਺ܕ ɾ δΣωϦ οΫΛ૊Έ߹Θͤͯ

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w ௐࢠʹ৐͍͖ͬͯͳΓ ʮϞφ υ΍Δͧʔʯ ͱ͔ݴ͍ग़ͤ͹େମҾ͔ΕΔ w ؔ਺ܕݴޠ͕ԿΛࠀ෰͢΂͘0QUJPO΍&JUIFSΛ࣮૷͍ͯ͠Δͷ͔Λཧղ͢Δ w ྫ͑͹getOrElse()ͷߟ͑ํͳͲ͸ೲಘ͞Ε΍͘͢ಋೖ͠΍͍͢ ։ൃνʔϜͷཧղΛಘΔ

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w ٸͳ࢓༷มߋͰɺ 5ZQF4DSJQUͷܕ෇͚͚ͩͰ͸ݫ͍͠Օॴ͕Ͱ͖ͯͨͱ͖ w EitherܕͰॲཧΛେ෯ʹม͑ͣʹରԠͰ͖ͳ͍ͩΖ͏͔ w 5ZQF4DSJQUʹ͸strictNullChecks͕͋Δ͕ສશͰ͸ͳ͍ w JGจΛڧཁͯ͘͠ Δ͋ͨΓ w undefined, nullରࡦͷΞϓϩʔνͱͯ͠ࣄ৘Λ஌͓ͬͯ͘ ͱΑ͍ ٸస׵ʹඋ͑Δ

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ϑϩϯ τΤϯ υ ɾ ΤϯδχΞͷ  ଞݴޠͱͷ෇͖߹͍ํ

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wʮϑϩϯ τΤϯ υ ɾ ΤϯδχΞ͔ͩΒ+BWB4DSJQU 5ZQF4DSJQUֶ͹ͳ͘ ͪΌʜʯ wʮ)5.-΋$44΋΍Βͳ͍ͱʜʯ w ΋ͪΖΜͦΕ͸େࣄ w ҰํͰɺ ΤϯδχΞͱͯ͠ͷࢹ໺Λ޿͛Δ͜ͱ΋େࣄ ϑϩϯ τΤϯ υ ɾ ΤϯδχΞͱ ͯ͠

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wʮ͜ͷݴޠͰ͸+4Ͱى͜ Γ͕ͪͳ໰୊Λ͜͏΍ͬͯղܾͯ͠Δͷ͔ʯ w ˠ+4Ͱ΋ࣅͨΑ ͏ͳΞϓϩʔνͰղܾ͍ͯ͠ΔϥΠ ϒϥ Ϧ͕͋Δ ʂ wʮ࠷৽ͷݴޠʹ͋ͬͨ˓˓ߏจɺ +4ʹ΋ཉ͍͠ͳʔʯ w ˠ5$ͷϓϩϙʔβϧʹ΋͏ग़ͯΔ ʂ w ͱ͍ͬͨɺ +BWB4DSJQUք۾ΩϟονΞοϓʹ͓͚ΔΞϯςφͷຊ਺͕૿͑  ൃݟ΍௥੻͕༰қʹͳΓɺ ڻ͔ͳ͘ ͯࡁΉ ଞݴޠֶशͷར఺

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w ΩϟονΞοϓ΁ͷযΓɺ ྲྀߦϥΠ ϒϥ Ϧ΁ͷܯռɺ ϑ ϨʔϜϫʔΫϓϩϨεͷউഊʜ w ͜Ε͸ࠣࡉͳ͜ͱ w ߄ͯΔ͜ͱ͸ͳ͍ w ຊ࣭తͳղܾखஈ͸Կͳͷ͔Λߟ͑Δ w ྺ࢙ʹֶͿ w ύϥμΠϜʹֶͿ ߄ͯͳ͍ͨΊʹ

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