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5分で知るGo言語
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yudoufu
September 08, 2014
Programming
0
160
5分で知るGo言語
社内向けLTとして用意したGo言語の入門以前の紹介。
yudoufu
September 08, 2014
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Transcript
ͰΔ(Pݴޠ %BJDIJ,BNFNPUP $SPDPT)BDL)PVS
͜͜Ͱ͢͜ͱ w (Pݴޠʹ৮Εͨ͜ͱͳ͍ਓ͕ɺ5PVSPG(PΛ࢝ ΊΔͷʹࠔΒͳ͍Α͏ʹɺ)FMMP 8PSME·Ͱ ! w ·͊ɺͩ͠ɻ w ͕ٱʑLFZOPUF࡞Δ࿅श͔ͨͬ͠
SZ
ΞδΣϯμ w (Pݴޠͱ w (PQIFS w ڥΛ͑Δ w )FMMP8PSME w
جຊίϚϯυͱ͔
(Pݴޠͱ w (PPHMFͷ࡞ͬͨίϯύΠϧܕϓϩάϥϜݴޠ w ޙൃݴޠͳΒͰͷϞμϯͰॻ͖͍͢4ZOUBY w ίʔσΟϯάελΠϧܾΊΒΕͯΔ͠ɺެ͔ࣜΒϑΥʔ Ϛολ͕ఏڙ͞ΕͯΔ w ͕༰қͳ୯ҰόΠφϦ
w ๛ͳඪ४ύοέʔδ $ݴޠൺ͚ͩͲ w ಛʹฒྻॲཧ͚ͷػೳ͕๛
(Pݴޠͱ w ެࣜαΠτ w IUUQHPMBOHPSH w ΦϯϥΠϯ࣮ߦͱ͔ग़དྷΔεάϨϞϊ w 4UBCMF7FSTJPO
(PQIFS w ެࣜΩϟϥΫλʔ w Β͕͖͘෩ w ͖͍ w Ͳ͏ͯ͜͠͏ͳͬͨ
(PQIFS w ͵͍͙ΔΈ͋Δ w ΘΓͱछྨ͋Δ෩ ! w HPMBOH͢Δਓͷ͜ͱɺ HPQIFSͬͯݺͿΒ͍͠ɹ
ڥΛ͑Δ w ৽͍͠ͷͰɺΘΓͱ͍͍ϖʔεͰਐԽͯ͠Δ w खܰʹ৽͍͠ڥ͍͑ͨ w ͪΐ͍ݹใʹৼΓճ͞Εͳ͍Α͏ʹܰ͘հ
ίϯύΠϥͷ४උ w .BD ! w %FCJBO BOEBOZPUIFSMJOVY w QBDLBHF͕ݹ͍ͷͰɺHPEFCΛ͏ͱָ
! % wget https://godeb.s3.amazonaws.com/godeb-‐amd64.tar.gz % tar xvzf godeb-‐amd64.tar.gz % sudo ./godeb install 1.3.1 % brew install go
࡞ۀσΟϨΫτϦ w (01"5)ͱݺΕΔ࡞ۀσΟϨΫτϦ͕ඞཁ w ࣗͷ͖ͳॴʹ͍͍ͯ͠ w ྫ͑ɺ)0.&PQUHPΛ࡞ͬͯΔɻ % mkdir -‐p
$HOME/opt/go/src # srcඞਢʹͳΔͷͰ࡞ͬͱ͘ % echo ‘export GOPATH=$HOME/opt/go’ >> $HOME/.zshrc
࡞ۀσΟϨΫτϦ w (Pؔ࿈ͷQBDLBHFྨશ෦(01"5)ʹೖΔ w ࣗͷύοέʔδ͜͜Ͱ࡞Δ ! w ಈੜ͞ΕΔ . ├──
pkg │ └── darwin_amd64 │ ├── code.google.com │ ├── github.com │ └── honnef.co └── src ├── code.google.com │ └── p ├── github.com │ ├── crocos │ ├── golang │ ├── jstemmer │ ├── kisielk │ ├── mitchelh │ └── nsf └── honnef.co └── go
WJNʹ͍ͭͯ w WJNNFSͳΒ ࠷ॳ WJNHP͕Φεεϝ w IUUQTHJUIVCDPNGBUJIWJNHP w (Pʹඪ४ͷWJNαϙʔτ͋Δ֦͠ு͢Δ ͷ͋Δ͚Ͳɺ·ͣखܰͳͷͰ
w ·͊WJNઃఆ)FMMP 8PSMEޙͰ͍͍Μ͡ΌͶ
ิ w 2Α͘(03005ઃఆ͠ΖͬͯهࣄݟΔ͚Ͳʁ w "͋Εɺݹ͍ίϯύΠϧؔ࿈ઃఆͳΜͰɺHPEFC ͰೖΕΕؾʹ͠ͳͯ͘େৎͬ͢ w ࢀߟIUUQLXNUOFUJOEFYQIQ ZPVEPOUOFFEUPTFU HPSPPUSFBMMZ
)FMMP 8PSME w Կͱ͋ΕͬͯΈΑ͏ w ·ͣ࡞ۀσΟϨΫτϦΛ४උ ! w TSDҎԼΛϦϙδτϦ໊ͬΆ͘࡞Δ w
HPHFUͷϑΥʔϚοτʹ߹ΘͤͯΔΜͰ͢ % cd $GOPATH/src % mkdir -‐p github.com/crocos/go-‐helloworld # ྫ͑Ͷɻ % vim main.go
)FMMP 8PSME w ҙ w JOEFOUIBSEUBC w GVODNBJO \Χοίվߦ͠ͳ͍Ͱίί w
࢝·ΓNBJOQBDLBHFͷNBJO͔ؔΒ package main ! import “fmt” ! func main() { fmt.Println(“Hello, World!”) }
)FMMP 8PSME ! w ͘͠ ! w ʘ ?P? ʗ
% go run main.go # Hello, World! % go build main.go % ./go-‐helloworld
جຊతͳίϚϯυͱ͔ w ରϑΝΠϧΛίϯύΠϧ࣮ߦ w ಈ࡞ςετͳͲʹ͏ɻ ! w ରσΟϨΫτϦҎԼͷίϯύΠϧɺόΠφϦੜ %
go run main.go hoge.go … % go build
جຊతͳίϚϯυͱ͔ w ύοέʔδΛऔͬͯ͘Δ w ֎෦ϥΠϒϥϦΛऔಘͨ͠ΓɺύοέʔδΛ࣋ͬ ͖ͯͨΓ৭ʑ w (01"5)ͷԼʹల։͞ΕΔ % go
get github.com/crocos/rds-‐testrunner
͜ͷ͋ͱ w UPVSPGHP w IUUQHPUPVSKQBQQTQPUDPN w HPMBOHKQߋ৽͞Εͯͳ͍ͷͰݟͪΌμϝ w ࠓ݄ͷ8&# %#
w &⒎FDUJWF(P w IUUQTHPMBOHPSHEPDF⒎FDUJWF@HPIUNM