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TOKIWANOMORI-20180901
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MzRyuKa
September 01, 2018
Programming
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520
TOKIWANOMORI-20180901
トキワの森LT大会(2018/09/01)でLT発表した資料です。
MzRyuKa
September 01, 2018
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Transcript
RubyεΫϦϓτΛ Goݴޠʹஔ͖͑ͨΒ ॲཧ͕࣌ؒ̎̌ͷ̍ʹͳͬͨ 2018.09.01 τΩϫͷLTେձ @MzRyuKa
ຊ͍͑ͨ͜ͱ ͪΐͬͱͨ͠ॲཧͰGoͰॻ͘ͷ͓͢͢Ί
ࣗݾհ ΈͣΓΎ @MzRyuKa https://mzryuka.hatenablog.jp/ தখاۀͷSIer ࠷ۙɺࣗࣾͷࣾษ ڧձͰएखࣾһʹࠞͬ͡ ͯ৭ʑָ͠ΜͰ͍·͢ɻ
͖͔͚ͬ ผձ͕ࣾఏڙ͢Δ6000ݸͷcsvϑΝΠϧ͕Πϯϓοτɻ ͔͠͠ɺ͜Μͳ͕ଟൃͨ͠ɻ ϑΝΠϧ໊ͷ໋໊ϧʔϧʹ͋ͬͯͳ͍ɻ ϑΝΠϧͷσʔλܗ͕ࣜʮόΠφϦܗࣜʯʹͳ͍ͬͯͨɻ ϑΝΠϧதͷॻ͕ࣜؒҧ͍ͬͯͨɻ σʔλ߲ͷΧϯϚͷ͕ؒҧ͍ͬͯͨɻ ಛఆͷσʔλ߲ͷઃఆ͕ޡ͍ͬͯͨɻ
ରࡦͱͯ͠ɺ؆қతͳνΣοΫεΫϦϓτΛ bashͱrubyͰύύοͱ࡞ͨ͠ɻ ༁ɿ bash: ʮfileʯίϚϯυͰϑΝΠϧܗࣜΛνΣοΫɻ 1ͰνΣοΫྃ ruby: ϑΝΠϧܗࣜҎ֎ͷνΣοΫΛ࣮ࢪɻ ̏̌ͰνΣοΫྃ ݁Ռɺ1ճͷνΣοΫʹ̏̎ͷॲཧ࣌ؒɻ
ʢ݄̍ͷσʔλͷͨΊɺ̍͋ͨΓ1ͷॲཧʣ
ఔ͜ΕͰରԠ͍ͯͨ͠ɻ ͔͠͠ɺʹճ֬ೝ͢Δέʔε͕ग़͖ͯͨͷ Ͱɺͪΐͬͱ͕࣌ؒମແ͘ͳ͖ͬͯͨɻ ʮࣄʹ༨༟͕͋Δঢ়گͳͷͰɺͪΐͬ͘Β GoݴޠͰॻ͖ͯ͠ΈΔ͔ɻʯͱࢥཱ͍ͭɻ
GoݴޠͰͷॻ͖͑ ผݴޠͰͷ࣮ͩ̇ͱු͔Εͯͨ໘ɺrubyͷॻ͖ํʹ׳ Ε͍ͯͨͷͰɺׂͱΠϥͬͱ͠ͳ͕Βॻ͍͍ͯͨɻ ΠϥΠϥϙΠϯτɿ ར༻͍ͯ͠ͳ͍มύοέʔδͷએݴͰౖΒΕΔ ifจ͕̍ߦͰॻ͚ͳ͍ͨΊߦ͕૿͑Δ ໌ࣔతͳܕࢦఆΛ͢ΔͷͰɺؔͷฦ͢ܕͷௐ͕ࠪ໘
ϑΝΠϧͷܗࣜνΣοΫɺGoͰͲ͏͢Εྑ͍ ͔Θ͔Βͳ͔ͬͨͷͰɺ֎෦ίϚϯυͰʮfileʯΛ ࣮ߦ͢ΔΑ͏ʹͨ͠ɻ out, err := exec.Command(“file”,fullpath).Output() if err !=
nil { return false } outstr := fmt.Sprintf(“out: %s”, out) if strings.Index(outstr, “ASCII text”) == -1 { return false } return true
ϑΝΠϧͷ໋໊νΣοΫɺਖ਼نදݱΛར༻ɻ ಉ༷ʹɺͷॻࣜνΣοΫਖ਼نදݱɻ Goͷਖ਼نදݱ͍ͱฉ͍͍͕ͯͨɺ ଞʹྑ͍Ҋࢥ͍͔ͭͣɺ͜ΕͰ࣮ɻ var re := regex.MustCompile(`^2[0-1][0-9][0-9]ʢ~ུ~ʣ.csv$`) func checkFileName(filename
string) bool { return re.MatchString(filename) }
࣮ߦલ ͜Μͳײ͡Ͱॻ͍ͯɺͻͱ·ͣɻಛʹ ͤͣʹॻ͍ͨͷͰੑೳෆ͔҆͠ͳ͍ɻ ·͊ɺ͕࣌ؒʹͳΕɺ͏͚ͷɻ ͘ͳͬͯͨΒGoroutineͰฒྻ࣮ߦͰ͢ΔΑ͏ ʹมߋ͠Α͏͔ͳʙɺͱࢥ͍ͳ͕Β࣮ߦɻ
݁Ռ શνΣοΫͷ࣮ߦ࣌ؒʮ̍ʯͱͳͬͨɻ ʢtimeίϚϯυͰճܭଌʣ ɾɾ͋ΕɺbashͷνΣοΫ࣮ߦ࣌ؒͱ΄΅ಉ͡ʁ
݁Ռʢͦͷ̎ʣ ؾʹͳͬͯɺ ʮfileʯίϚϯυͷ࣮ߦ෦͚ͩͰ࣮ߦͨ͠Βɺ ࣮ߦ࣌ؒʮ1ʯͩͬͨɻ
݁Ռʢͦͷ̏ʣ ͞Βʹؾʹͳͬͯɺ ʮfileʯίϚϯυ෦Λআ͍࣮ͯߦ͢Δͱɺ ࣮ߦ࣌ؒʮ̍̍ඵʯͩͬͨɻ
“ॲཧ࣌ؒͷ୯Ґ͕มΘͬͨʂ” ϏόʂGolang!!
ॻ͖͑ͨՌ ୯७ʹGoݴޠͰॻ͖͚͑ͨͩͰɺॲཧ࣌ؒ ʮ̎̌ͷ1ʯ(32ˠ1)ͱͳͬͨɻ ʮfileʯίϚϯυͷݺͼग़͠෦࣮࣭తʹมΘͬ ͍ͯͳ͍ͷͰɺruby→golangʹมߋͨ͜͠ͱʹΑ ΔޮՌɺʮ̍̒̌ͷ̍ʯ(30ˠ11ඵ)ͱ ͳͬͨɻ
·ͱΊ Rubyͷಈతݴޠɺͬ͞ͱ࡞ΕΔ͓ख͕ܰ͋͞ Δ͕ॲཧ͕ؾʹͳͬͯ͘Δɻ GoͰॻ͍ͯΔͱଟগΠϥΠϥ͢Δ͜ͱ͋ͬͨɻ ͕ɺॲཧΛΈͯաڈͷ͜ͱਫʹྲྀͨ͠ɻ Ұ୴ಈతݴޠͰॻ͍ͯΈͯɺΠϝʔδΛ௫ΜͰ ͔ΒGoͰஔ͖͑Δͷ͋Γͩͱࢥ͍·͢ɻ