Slide 1

Slide 1 text

4BU 3VCP$PQ )FBERVBSUFST 3BJMT%FWFMPQFST.FFUVQ%BZ&YUSFNF %3&$0.$P -UE The road to RuboCop 1.0 after RubyKaigi 2018 ,PJDIJ*50FTN

Slide 2

Slide 2 text

!LPJD w 3VCP$PQDPNNJUUFS w "30SBDMFFOIBODFE BEBQUFSDPNNJUUFS w &JXB4ZTUFN .BOBHFNFOU *OD

Slide 3

Slide 3 text

!FTNJOD -VODI4QPOTPS )FSF

Slide 4

Slide 4 text

3BJMTENBOENF

Slide 5

Slide 5 text

3BJMTEN

Slide 6

Slide 6 text

3BJMTEN

Slide 7

Slide 7 text

3BJMTENEBZ

Slide 8

Slide 8 text

3BJMTENEBZ

Slide 9

Slide 9 text

No content

Slide 10

Slide 10 text

No content

Slide 11

Slide 11 text

No content

Slide 12

Slide 12 text

3BJMTίϛϡχςΟҭͪͷࢹ఺

Slide 13

Slide 13 text

4BU 3VCP$PQ )FBERVBSUFST 3BJMT%FWFMPQFST.FFUVQ%BZ&YUSFNF %3&$0.$P -UE The road to RuboCop 1.0 after RubyKaigi 2018 ,PJDIJ*50FTN

Slide 14

Slide 14 text

ࠓ೔ͷ࿩

Slide 15

Slide 15 text

IUUQTTQFBLFSEFDLDPNLBLVUBOJBHJMFNBOJGFTUPEFDBEF TMJEF !LBLVUBOJ

Slide 16

Slide 16 text

w"CPVU3VCP$PQ)2 w5IFSPBEUP 3VCP$PQBGUFS 3VCZ,BJHJ "HFOEB

Slide 17

Slide 17 text

1FPQMF 1SPEVDU

Slide 18

Slide 18 text

1FPQMF

Slide 19

Slide 19 text

w ೥݄೔ʹདྷ೔͍ͯͨ͠ !CCBUTPWʹΑͬͯެ։͞ΕΔ w (JU)VC্ʹ෼ࢄ͍ͯͨ͠(BOH PG3VCP$PQΛ౷ׅ͍ͯ͠Δ (JU)VCPSHBOJ[BUJPO w "OFX044DPNNVOJUZ 3VCP$PQ)FBERVBSUFST

Slide 20

Slide 20 text

HJUIVCDPNSVCPDPQIR

Slide 21

Slide 21 text

No content

Slide 22

Slide 22 text

w 3VCP$PQ$PSF w 3VCP$PQ1FSGPSNBODF w 3VCP$PQ3BJMT w 3VCP$PQ34QFD w 3VCZ4UZMF(VJEF w 3BJMT4UZMF(VJEF w 3VCP$PQ+1 w FUD 3VCP$PQ)2ͷSFQP

Slide 23

Slide 23 text

w ෼ࢄͨ͠ෳ਺ͷݸਓϦϙδτϦ͔Β ͍ͪίϛϡχςΟͷϦϙδτϦ΁ w ݸਓϦϙδτϦͷਓ͕ͨͪ)2ʹू ·͖ͬͯͨ 044ίϛϡχςΟͷৢ଄

Slide 24

Slide 24 text

w 3VCP$PQ$PSFΛத৺ʹؔ৺ͷ͋ Δϝϯόʔɺ3VCP$PQ34QFDΛ த৺ʹ׆ಈ͍ͯ͠Δϝϯόʔ w ͢΂ͯͷϦϙδτϦʹίϛοτݖ͕͋ ΔΘ͚Ͱ͸ͳ͍ w ྫ͑͹ࢲ͸$PSF1FSGPSNBODF 3BJMT+1 ϝϯόʔ͝ͱͷྖҬͷҧ͍

Slide 25

Slide 25 text

w $PSF͸CCBUTPWSVCPDPQͩͬ ͨ΋ͷͰɺ͍ΘΏΔ3VCP$PQͱݺ ͹Ε͍ͯΔ΋ͷͷத৺ w 3VCP$PQ34QFDͳͲ֦ு$PQ͕ ґଘ͍ͯ͠Δ֦ுݩ(FNͷଆ໘ w $PSFͰܧঝʹؔ͢ΔΠϯλϑΣʔε ͕มΘΔͱ֦ு$PQ͸ӨڹΛड͚Δ ֦ுݩ$PQͱͯ͠ͷ$PSF

Slide 26

Slide 26 text

w ͜͜Ұ೥ͷഁյతมߋͱͯ͠͸ /PEF1BUUFSOͷOJM ΁ͷมߋ΍ 3VCP$PQ$PQ͔Βͷ 3BOHF)FMQϞδϡʔϧ੾Γग़͠ ͕͋Δ ֤֦ு(FN͸௥ਵ͕ඞཁ w ؔ৺ͷ͋Δϝϯόʔ͕)2ʹू·ͬ ͨͷ͸ྑ͍࿩ ҟͳΔϓϩδΣΫτؒͰͷಉظ

Slide 27

Slide 27 text

w ίϯτϦϏϡʔλʹൺ΂ͯ΍ΕΔ͜ ͱ͕૿͑Δ w ίϛολʔʹͳͬͯվΊͯࢥͬͨ͜ Ε·Ͱͱ͜Ε͔Β w (JU)VCϕʔεͷ3BJMTίϛϡχ ςΟͱൺֱ )2ઃཱͱಉ࣌ʹίϛολʔʹͳͬͨ

Slide 28

Slide 28 text

044ίϛϡχςΟʹΑΔҧ͍ SBJMTSBJMT CCBUTPWSVCPDPQ 3FWJFX ؔ৺Λ࣋ͬͨਓ ؔ৺Λ࣋ͬͨਓ $MPTF JTTVF *TTVFνʔϜɺίϛολʔɺί Ξϝϯόʔ ίϛολʔ .FSHF13 ίϛολʔɺίΞϝϯόʔ ΄΅ϦϙδτϦΦʔφʔ NBTUFS QVTI ίϛολʔɺίΞϝϯόʔ ϦϙδτϦΦʔφʔͷΈ ؍ଌൣғ 3FMFBTF ϦϦʔεϚωʔδϟ ϦϙδτϦΦʔφʔ

Slide 29

Slide 29 text

ࢲ͕ۙະདྷʹඳ͘3VCP$PQ)2ͷੈք؍ SBJMTSBJMT SVCPDPQIRSVCPDPQ 3FWJFX ؔ৺Λ࣋ͬͨਓ ؔ৺Λ࣋ͬͨਓ $MPTF JTTVF *TTVFνʔϜɺίϛολʔɺί Ξϝϯόʔ ίϛολʔ .FSHF13 ίϛολʔɺίΞϝϯόʔ ίϛολʔ NBTUFS QVTI ίϛολʔɺίΞϝϯόʔ ίϛολʔ 3FMFBTF ϦϦʔεϚωʔδϟ ϔουϝϯςφʔ 0S

Slide 30

Slide 30 text

SVCPDPQIRSVCPDPQ %SPQTVQQPSUGPS.3*

Slide 31

Slide 31 text

w HJUQVTIPSJHJONBTUFSʹͭ ͍ͯ w جຊ͸1VMM3FRVFTUΛ։͘ w ໌നͳ$PTNFUJDDIBOHF͸ NBTUFSQVTIͰྑ͍ͷͰ͸ʁ ίϛολʔͷݖརͱن཯

Slide 32

Slide 32 text

No content

Slide 33

Slide 33 text

w ΍ͬͯΈͤ HJUQVTIPSJHJONBTUFS git push origin master

Slide 34

Slide 34 text

SVCPDPQIRSVCPDPQ!GGBF 'JY$)"/(-0(NE

Slide 35

Slide 35 text

No content

Slide 36

Slide 36 text

No content

Slide 37

Slide 37 text

IUUQTUXJUUFSDPNLPJDTUBUVT

Slide 38

Slide 38 text

w lNBTUFSQVTI͢Δͱ͖͸13Λ ૹΔͱ͖ΑΓ΋৻ॏʹ΍͍ͬͯΔz w l࣌ؒʹ௥ΘΕͯΔͱ͖͸΍Βͳ͍z w l ϛεͨ͋͠ͱ NBTUFSQVTIͷ จԽΛ࡞ΔͳΒઆ໌͸͏·͍͜ͱ͢ Δඞཁ͕͋Δz 3BJMTίϛολʔ͔Βͷॿݴ

Slide 39

Slide 39 text

No content

Slide 40

Slide 40 text

No content

Slide 41

Slide 41 text

͔͜͜Βগ͠ ৽ͨͳࢀೖ΁ͷώϯτ

Slide 42

Slide 42 text

ਓࡐ͸༗ݶͰ ͋Γྲྀಈ͢Δ IUUQTHJUIVCDPNSVCPDPQIRSVCPDPQJTTVFTJTTVFDPNNFOU

Slide 43

Slide 43 text

w 5IF3BJMT%PDUSJOF w ҟͳΔࢹ఺ɺ৽ͨͳίϛϡχςΟϝ ϯόʔΛܴ͑ೖΕΔ w HPPEpSTUJTTVF w 3VCP$PQ+1 l1VTIVQBCJHUFOUz

Slide 44

Slide 44 text

No content

Slide 45

Slide 45 text

HPPEpSTUJTTVF

Slide 46

Slide 46 text

lHPPEpSTUJTTVFz

Slide 47

Slide 47 text

3VCP$PQ+1

Slide 48

Slide 48 text

No content

Slide 49

Slide 49 text

w ͍͖ͳΓ೉͍͠໰୊Λղ͜͏ͱ͠ͳ͍ w lHPPEpSTUTUFQz͸͸͡ΊͷҰา΁ ͷΦεεϝͷϥϕϧ w ِཅੑ΍Τϥʔʹ͍ͭͯΠγϡʔΛ։͘ ͜ͱʹΑͬͯࢀՃ͢Δͱ͍͏Ұา໨ w ΠγϡʔςϯϓϨʔτʹ४͡Δͱ(PPE 044ίϛϡχςΟ΁ͷࢀՃͷҰา

Slide 50

Slide 50 text

QPDLF .ZHPBMGPSUIJTPSHBOJ[BUJPOJTUPCFDPNFUIF DFOUSBMIVCGPSBMMUIFDPSF3VCP$PQSFMBUFE BDUJWJUJFT*XBOUVTUPCVJMEBCJHHFSDPSFUFBN TOJQ *UIBTO`UCFFOBQFSTPOBMQSPKFDUPGNJOFGPSRVJUF BXIJMF*GTPNBOZQFPQMFBSFVTJOHJU JGTPNBOZ UIJOHTBSFOFFEFEUPCFEPOF UIJTCFMPOHTUPUIF DPNNVOJUZ IUUQTCMPHTJEFDJDPNJOUFSWJFXXJUICP[IJEBSCBUTPWCCGEB :FTUFSEBZ ZPVNPWFE3VCP$PQSFQPTJUPSZGSPN VOEFSCCBUPTWUPSVCPDPQIR TOJQ $BOZPVUFMMVTPUIFSQMBOTGPSUIFPSHBOJ[BUJPO CCBUTPW *OUFSWJFXXJUI#P[IJEBS#BUTPW 1SFTFOUFECZ4JEFS5FBN

Slide 51

Slide 51 text

1SPEVDU

Slide 52

Slide 52 text

IUUQTXXXZPVUVCFDPNXBUDI WOS)K7$V7T("

Slide 53

Slide 53 text

&YUSBDU3BJMT$PQTJOBTFQBSBUF &YUSBDU1FSGPSNBODF$PQTJOUPB TFQBSBUFHFN &YUFOEDPQNFUBEBUB *OUSPEVDFOFXDPQTXJUIBTQFDJBMTUBUVT JOTUFBEPGFOBCMFEEJTBCMFE *NQMFNFOUPQUJPOTUPSVOPOMZTBGFDPQT BOETBGFBVUPDPSSFDUT #JHNJMFTUPOFUP3VCP$PQ

Slide 54

Slide 54 text

SVCPDPQIRSVCPDPQ &YUSBDU3BJMT$PQTJOBTFQBSBUF

Slide 55

Slide 55 text

No content

Slide 56

Slide 56 text

w 3VCP$PQࣗମ͸ϑϨʔϜϫʔΫ ϥΠϒϥϦϥϯλΠϜʹґଘͤͣ 3VCZʹϑΥʔΧε͍ͨ͠ w ࡞ऀͱͯ͠ɺ͍·͸3BJMTΛ͋·Γ ΍͍ͬͯͳ͍Β͍͠ w ͨͷ·Ε·ͨ͠ 5-%3

Slide 57

Slide 57 text

w SVCPDPQSBJMTͱ͍͏HFN͸ طʹଘࡏ͍ͯ͠Δ ΤίγεςϜ্ͷ՝୊

Slide 58

Slide 58 text

No content

Slide 59

Slide 59 text

No content

Slide 60

Slide 60 text

w SBJMTSBJMTͷSVCPDPQZNMΛ൓ө͠ ͨSEQBSUZDPQ w 3VCZ,BJHJͰCCBUTPW͞Μʹ ZBIPOEB͞Μ͕࿩Λͯ͘͠Εͨ w 3VCZ,BJHJޙʹ%SFONJ͞ΜΒ͔Βϝ ϯγϣϯ͕͋Δ w 13Λૹ͍ͬͯͨࢲʹҾ͖ܧ͗ ྲྀΕ

Slide 61

Slide 61 text

No content

Slide 62

Slide 62 text

No content

Slide 63

Slide 63 text

No content

Slide 64

Slide 64 text

No content

Slide 65

Slide 65 text

!UPTIJNBSV͞Μ͋Γ͕ͱ͏͍͟͝·͢ʂ

Slide 66

Slide 66 text

w 3VCP$PQͷ3BJMT෦ॺʹ͍ͭͯ ελϒʹͯ͠ɺSVCPDPQSBJMT HFNͷ௥ՃΛଅ͢ϩάΛग़ྗ͢Δ w ͋Δ͍͸3VCP$PQ3BJMTʹ ϑΥʔϧόοΫ͢Δ 3VCP$PQ3BJMT΁ͷҠߦ

Slide 67

Slide 67 text

SVCPDPQIRSVCPDPQ &YUSBDU1FSGPSNBODF$PQTJOUPBTFQBSBUFHFN

Slide 68

Slide 68 text

No content

Slide 69

Slide 69 text

w ύϑΥʔϚϯεޮ཰ʹ͍ͭͯ.3* ʹಛԽͨ͠಺༰ʹͳ͍ͬͯΔ w 3VCP$PQ͸+3VCZ΋αϙʔτ ͍ͯ͠Δ w 3VCP$PQ$PSFͱͯ͠͸ॲཧܥ ʹґଘ͠ͳ͍ܗΛࢦ޲͍ͯ͠Δ 5-%3

Slide 70

Slide 70 text

No content

Slide 71

Slide 71 text

w ࣮ࡍͷޮՌʹ͍ͭͯ͸ɺެࣜυΩϡ ϝϯτͷϦϑΝϨϯεʹه͞Ε͍ͯ Δ৔߹͕͋Δ w ࠾୒Λ೰Μͩ࣌͸Ұಡ͔ͯ͠Β࣮ߦ ΛࢼΈͯ΋ྑͦ͞͏ 5JQTPG1FSGPSNBODFDPQ

Slide 72

Slide 72 text

1FSGPSNBODF4BNQMF

Slide 73

Slide 73 text

+VBOJUP'BUBTGBTUSVCZ

Slide 74

Slide 74 text

SBJMTSBJMT

Slide 75

Slide 75 text

CFODINBSLJQT

Slide 76

Slide 76 text

$PNQBSJTPO % ruby -v shuffle-first-vs-sample.rb ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64- darwin17] Warming up -------------------------------------- Array#shuffle.first 35.171k i/100ms Array#sample 229.945k i/100ms Calculating ------------------------------------- Array#shuffle.first 400.180k (± 5.9%) i/s - 2.005M in 5.026934s Array#sample 6.407M (± 6.4%) i/s - 31.962M in 5.010117s Comparison: Array#sample: 6407183.3 i/s Array#shuffle.first: 400180.2 i/s - 16.01x slower

Slide 77

Slide 77 text

w !DPNQPTFSJOUFSBMJB͕ਐΊͯ ͘Ε͍ͯΔ w 3VCP$PQʹ޲͚ͯ 3VCP$PQ3BJMTಉ༷ਐḿ͍ͯ͠Δ w ͠͹Β͘3VCP$PQ$PSFͱͷಉ ظ͕৬ਓͷԹ͔ͳख࡞ۀ 1FSGPSNBODFDPQTͷநग़ঢ়گ

Slide 78

Slide 78 text

SVCPDPQIRSVCPDPQ &YUFOEDPQNFUBEBUB

Slide 79

Slide 79 text

No content

Slide 80

Slide 80 text

w ͓ͦΒ͘3VCP$PQͷ໨ۄ w 3VCP$PQΛΞοϓάϨʔυͨ͠ࡍʹ ރΕ͍ͯͳ͍$PQͰͷ໰୊͕͋ͬͨΓ CSFBLJOHDIBOHFͨ͠Γͷ൵͠Έ ͷ͓ศΓ΁ͷػೳ w SVCPDPQZNM EFGBVMUZNM ΁ͷ ϝλσʔλͷ௥Ճ 5-%3

Slide 81

Slide 81 text

w 7FSTJPO"EEFEʜ$PQ͕௥Ճ͞Εͨόʔδϣ ϯ w 7FSTJPO$IBOHFEʜϢʔβʔʹӨڹͷ͋Δόʔ δϣϯ ৽͍͠ઃఆɺσϑΥϧτͷมߋ w 7FSTJPO3FNPWFEʜ࡟আ͞Εͨόʔδϣϯ w 4BGFʜِཅੑͳͲͳ͘ઃܭͲ͓Γʹ৴པͰ͖Δ w 4BGF"VUP$PSSFDUʜࣗಈमਖ਼ͰյΕ͍ͯͳ͍ ͭͷϝλσʔλ

Slide 82

Slide 82 text

w 4BGFΦϓγϣϯͷΈ࣮ߦ͢Δ w 4BGF"VUP$PSSFDUͷΈ࣮ߦ͢Δ w σϑΥϧτͰ͸͢΂ͯ4BGFѻ͍ w ࠷৽όʔδϣϯͷ$PQΛআ֎ͯ͠ ࣮ߦ͢Δ ࣮ߦΦϓγϣϯͷީิ

Slide 83

Slide 83 text

w 4BGFͱ4BGF"VUP$PSSFDUͷ൑ ఆʹ͍ͭͯͲ͏͢Δ͔ w طଘΠγϡʔ͕͋Δ͔͕ͻͱͭͷࢦඪ ʹͳΓͦ͏ ެ։͞Εͨ۩ମతඪຊ w ໰୊͕͋Ε͹3VCP$PQ$PSF͔ 3VCP$PQ+1·Ͱ͓ศΓΛ ݒ೦఺

Slide 84

Slide 84 text

w HPPEpSTUJTTVFͱͯ͠ਐΜͰ ͍Δ ঢ়گ

Slide 85

Slide 85 text

SVCPDPQIRSVCPDPQ *OUSPEVDFOFXDPQTXJUIBTQFDJBMTUBUVT JOTUFBEPGFOBCMFEEJTBCMFE

Slide 86

Slide 86 text

No content

Slide 87

Slide 87 text

w طଘͷFOBCMFEEJTBCMFE΁ ͷ֦ுͱղऍͰ͖Δ w ৽ͨʹ/FX ͋Δ͍͸OJM Λ༻ҙ ͯ͠ɺͦͷ஋ͷ৔߹͸৽ͨͳ$PQ Λ࢖͏͔Ϣʔβʔʹ༗ޮແޮΛΏ ͩͶΔܯࠂΛදࣔ͢Δ 5-%3

Slide 88

Slide 88 text

w ΞοϓάϨʔυ࣌ʹ໰୊ʹͳΔͷ͸ރ Ε͍ͯͳ͍৽͍͠$PQͷέʔε͕ଟ ͍ ϦάϨογϣϯΑΓͪ͜Β͕ଟ͍ w ϝλσʔλͷ7FSTJPO"EEFEɺ͋ Δ͍͸&OBCMFEͷ/FXΛݩʹͯ͠ ࠷৽ͷόʔδϣϯͰ௥Ճ͞Εͨ$PQ Λআ֎͢Ε͹ޡݕ஌ΛݮΒͤͦ͏ *.0ΞοϓάϨʔυ΁ͷ҆৺ͷ޲্

Slide 89

Slide 89 text

w ݱঢ়ͷ3VCP$PQͰແޮʹ͍ͨ͠ $PQ͸Enabled: falseͱͯ͠ ରॲͰ͖Δ͕ɺԿ͔ͷҙਤ͕͋ͬͯ EJTBCMFEʹͨ͠ͷ͔ɺόʔδϣ ϯΞοϓ࣌ͷރΕ͍ͯͳ͍$PQͩ ͔Βແޮʹ͍ͯ͠Δͷ͔ͷঢ়ଶ۠ผ ͕͔ͭͳ͍ ৽ͨͳϥϕϦϯά

Slide 90

Slide 90 text

SVCPDPQIRSVCPDPQ *NQMFNFOUPQUJPOTUPSVOPOMZTBGFDPQT BOETBGFBVUPDPSSFDUT

Slide 91

Slide 91 text

No content

Slide 92

Slide 92 text

w SVCPDPQίϚϯυ΁ͷΦϓγϣ ϯΛ௥Ճ͢Δ 5-%3

Slide 93

Slide 93 text

w --safeΦϓγϣϯʜ4BGFͷ$PQ ͷΈ࣮ߦ͢Δ w --safe-auto-correctΦϓγϣϯʜ 4BGF"VUP$PSSFDUͷ$PQͷΈ࣮ߦ ͢Δ w ͜ΕΒΛSVCPDPQZNMͰઃఆ΋Ͱ͖ ΔΑ͏ʹ͢Δ ৽ͨͳ࣮ߦΦϓγϣϯ

Slide 94

Slide 94 text

QPDLF *UIJOLUIBUUIPTFBSFUIFLFZQPJOUT*EPO`UXBOU VTUPIBWFTPNFIVHFSPBENBQGPS*XBOUVT UPIBWFTPNFUIJOHUIBUXFDBOBDUVBMMZSFBDIJOB GFXNPOUIT IUUQTCMPHTJEFDJDPNJOUFSWJFXXJUICP[IJEBSCBUTPWCCGEB $BOZPVUFMMVTUIFSPBENBQPG3VCP$PQJO NPSFEFUBJMT CCBUTPW *OUFSWJFXXJUI#P[IJEBS#BUTPW 1SFTFOUFECZ4JEFS5FBN

Slide 95

Slide 95 text

͓ΘΓʹ

Slide 96

Slide 96 text

w 3BJMTͱ1FSGPSNBODF͸$PSF͔ Β֎ΕΔ $PSFͷϝϯςφϯεੑ w 3VCP$PQ͸ϝλσʔλΛ࢖ͬͯ ҆৺͕͓͚ͦ͏ͳ$PQͱͦ͏Ͱͳ͍ $PQΛ৭෇͚Δ ར༻ऀ΁ͷ҆શੑ w ։ൃ͕͸͡·ͬͨ͹͔ΓͳͷͰ࠷৽ͷಈ ޲͸ϦϙδτϦΛݟ͍ͯͩ͘͞ ࠓޙͷ3VCP$PQ

Slide 97

Slide 97 text

wSVCPDPQIRSVCPDPQ wSVCPDPQIRSVCPDPQKQ wFTNJODBHJMF QSJWBUF wҙຯ͸Θ͔Γ·͢Ͷʁ 3VCP$PQ΁ͷJTTVF

Slide 98

Slide 98 text

One more thing…

Slide 99

Slide 99 text

3BJMT044ύονձ ΄΅݄࣍։࠵

Slide 100

Slide 100 text

4PDJBMDPEJOHTUBSUTXJUIZPV :PV

Slide 101

Slide 101 text

!LPJD 5IBOLT .*/"48"/

Slide 102

Slide 102 text

IUUQTTQFBLFSEFDLDPNLBLVUBOJBHJMFNBOJGFTUPEFDBEF TMJEF !LBLVUBOJ