猫とたはむれる - Speaker Deck

Slide 1

Slide 1 text

ೣͱͨ͸ΉΕΔ @cedretaber

Slide 2

Slide 2 text

Twitter / Github @cedretaber ͓࢓ࣄ Scala TypeScript झຯ Ruby Erlang / Elixir F# Dݴޠ

Slide 3

Slide 3 text

cats ࠓճ͝঺հ͢Δͷ͸typelevel / cats 4DBMBͰ'1Λߦ͏ҝͷϥΠϒϥϦ 4DBMB[ͱ͔ͷϑϨϯζ

Slide 4

Slide 4 text

Why cats? ࢖͍΍͍͢σʔλܕ͕ ἧ͍ͬͯΔ 4DBMBඪ४ͷσʔλܕʹ ΋ศརͳؔ਺Λ஫ೖ͠ ͯ͘ΕΔ ιʔε͕ಡΈ΍͘͢ݟ ָ͍͍ͯͯ͠

Slide 5

Slide 5 text

NonEmptyList

Slide 6

Slide 6 text

ʮઈରʹۭ͡Όͳ͍ࣄ͕อূ͞ΕͨʯϦετɻ ʮ͜͜Ͱ౉ͬͯ͘ΔϦετ͸ۭ͡Όͳ͍ʯͬͯ࣌ʹ ࢖͏ɻ

Slide 7

Slide 7 text

No content

Slide 8

Slide 8 text

Ϧετͱͷ૬ޓม׵ /PO&NQUZ-JTUΛ࢖͍͍ͨ৔໘͸-JTUΛ࢖͍͍ͨ৔ ໘ʹแؚ͞Ε͍ͯΔ͸ͣͳͷͰɺϦετͱͷ૬ޓม ׵͸ଟ༻͢Δɻ

Slide 9

Slide 9 text

No content

Slide 10

Slide 10 text

ͦͷଞͷϝιου /PO&NQUZ-JTU͸ී௨ͷϦετͷϝιου͕֓Ͷ࣮ ૷͞Ε͍ͯΔɻ ·ͨɺ4FNJHSPVQ,ɺ5SBWFSTFɺ.POBEͳͲͷΠ ϯελϯεͳͷͰɺศརͳϝιου΋਺ଟ͘࢖͑Δ ʢۭͷঢ়ଶ͕ଘࡏ͠ͳ͍ͨΊɺϞϊΠυͰ͸ͳ͘൒ ܈ͳͷͰ஫ҙɻʣ

Slide 11

Slide 11 text

No content

Slide 12

Slide 12 text

No content

Slide 13

Slide 13 text

No content

Slide 14

Slide 14 text

෇ه NonEmptyVector NonEmptyStream ΋͋Δɻ

Slide 15

Slide 15 text

Validated

Slide 16

Slide 16 text

ʮ-FGUΛ஝ੵ͢Δ&JUIFSʯ ໊લͷ௨ΓɺόϦσʔγϣϯΛ͔͚Δ࣌౳ʹॏๅ͢ Δɻ

Slide 17

Slide 17 text

ྫ Ϣʔβొ࿥ͷॲཧΛߟ͑Δɻ Ϣʔβ*%͸ॏෳෆՄɺύεϫʔυ͸จࣈҎ্ɺΈ ͍ͨͳͷ৚͕݅͋Δͱ͢Δɻ

Slide 18

Slide 18 text

No content

Slide 19

Slide 19 text

͜ͷ࣮૷ͩͱɺ*%ͱύεϫʔυͷ྆ํʹ໰୊͕͋Δ ৔߹΋*%ͷΤϥʔ͔͠ฦΒͳ͍ɻ όϦσʔγϣϯΛߦ͏৔߹ɺೖྗʹଘࡏ͢Δશͯͷ ϛεΛฦ͢ํ͕Ϣʔβʹ༏͍͠ɻ ͳͷͰɺ7BMJEBUFEΛ࢖͏ɻ

Slide 20

Slide 20 text

No content

Slide 21

Slide 21 text

No content

Slide 22

Slide 22 text

/PO&NQUZ-JTUͱͷซ༻ ઌड़ͷྫͩͱ4USJOHΛ࢖ͬͯΤϥʔΛ஝ੵ͕ͨ͠ɺ จࣈྻΛͪ͝Όͪ͝Όͱ઀ଓͯ͠͠·͏ͷ͸͋·Γ ៉ྷͳ΍Γํͱ͸ݴ͑ͳ͍ɻ ͳͷͰɺ/PO&NQUZ-JTUΛ࢖ͬͯ஝ੵͯ͠ΈΔɻ

Slide 23

Slide 23 text

Ͳ͏ͯ͠/PO&NQUZ-JTUͳͷ͔ʁ ผʹ௨ৗͷ-JTUͰ΋ྑ͍ͷ͕ͩɺ7BMJEBUFEͷ৔߹ɺ *OWBMJEʹͳΔ࣌͸ԿΒ͔ͷ஋͕ೖ͍ͬͯΔ͸ͣͳͷ Ͱɺ*OWBMJE͔ͭத਎͕ۭͱ͍͏ࣄ͸͋Γ͑ͳ͍ɻ ͳͷͰɺ/PO&NQUZ-JTUͷํ͕૬Ԡ͍͠ɻ

Slide 24

Slide 24 text

No content

Slide 25

Slide 25 text

7BMJEBUFE/PO&NQUZ-JTUͷ૊Έ߹Θͤ͸ඇৗʹ Α͘࢖͏ͷͰɺDBUTʹ͸*OWBMJEΛ/PO&NQUZ-JTU ͱ૝ఆͨ͠7BMJEBUFE/FMͱ͍͏ܕ͕༧Ί༻ҙ͞Ε ͍ͯΔɻ ˣఆٛ

Slide 26

Slide 26 text

No content

Slide 27

Slide 27 text

෇ه ʮਖ਼͍͠஋Λฦͭͭ͠ɺ ్தܦաͷԿ͔΋஝ੵ ͍ͨ͠ʯͱ͍͏৔߹͸ Iorͱ͍͏σʔλܕ͕࢖ ͑Δɻ

Slide 28

Slide 28 text

List, Either

Slide 29

Slide 29 text

҉໧ͷม׵Λར༻ͯ͠ɺDBUT͸طଘͷΫϥεʹ΋৭ʑ ͳϝιουΛੜ΍ͯ͘͠ΕΔɻ ಛʹɺ-JTU΍&JUIFSͷ֦ு͕ศརɻ 5SBWFSTF΍'PMEBCMF͸Ͳ͜·Ͱ΋ศརɻ YҎલͳΒ&JUIFSʹNBQqBU.BQΛੜ΍ͯ͠ ͘ΕΔͷ΋ศརɻ

Slide 30

Slide 30 text

No content

Slide 31

Slide 31 text

No content

Slide 32

Slide 32 text

No content

Slide 33

Slide 33 text

No content

Slide 34

Slide 34 text

No content

Slide 35

Slide 35 text

No content

Slide 36

Slide 36 text

6OBQQMZʹ͍ͭͯ ্Ͱ&JUIFS΍7BMJEBUFEͷ-JTUʹTFRVFODF΍ USBWFSTFΛద༻͍ͯ͠ΔͷΛݟͯɺٙ໰ʹײͨ͡ํ ΋ଟ͍ͩΖ͏ɻ ͱ͍͏ͷ΋ɺ෦෼ద༻͞ΕͨܕҾ਺Λਪ࿦Ͱ͖ͳ͍ ͱ͍͏໰୊ʢ4*ʣ͸༗໊ͰɺͦΕʹରԠ͢Δ ͨΊʹDBUT͸6OBQQMZΛ࢖͍͔ͬͯͨΒͩɻ

Slide 37

Slide 37 text

No content

Slide 38

Slide 38 text

͔͜͠͠ͷ໰୊͸೥ఔલʹղܾ͞Ε͓ͯΓɺ 4DBMB͔Β͸ܕਪ࿦͕վળ͞Ε͍ͯΔɻ ·ͨچόʔδϣϯͷ4DBMBͰ΋ɺTCUͷϓϥάΠϯΛ ࢖͏ࣄͰಉ౳ͷػೳΛར༻Ͱ͖Δɻ ͜ΕΛड͚ͯDBUTͰ͸ɺٞ࿦ͷ຤ɺ6OBQQMZͷར ༻Λίʔυ͔Βഉআ͢Δࣄʹͨ͠Β͍͠ɻ

Slide 39

Slide 39 text

ऴΘΓʹ

Slide 40

Slide 40 text

DBUT΍TDBMB[ʹ༻ҙ͞Εͨศརͳؔ਺Λ࢖͏ͱɺ΍ ΍͍͜͠ॲཧΛεοΩϦͱॻ͘ࣄ͕Ͱ͖Δɻ ಛʹUSBWFSTF΍TFRVFODFͳͲ͸ɺ࠶ؼؔ਺΍ GPME-FGUΛۦ࢖ͯ͠ॻ͜͏ͱ͢ΔͱͲ͏ͯ͠΋ෳࡶ ʹͳͬͯ͠·͏ɻ

Slide 41

Slide 41 text

ͨͩ͠ɺແҋʹ࢖͑͹͍͍ͱ͍͏Θ͚Ͱ΋ͳ͍ͷͰ ஫ҙɻ ݟ׳Εͳ͍ϝιουΛ࢖͏ΑΓɺ࠶ؼؔ਺ͱ GPME-FGUͰॻ͍ͨํ͕ʢिؒޙͷࣗ෼ΛؚΊͨʣ ଞਓʹͱͬͯಡΈ΍͍͢ࣄ΋͋Δɻ ͦͷ͋ͨΓ͸νʔϜͷ܏޲ͳͲݟͭͭௐ੔͍͖ͯ͠ ·͠ΐ͏ɻ

Slide 42

Slide 42 text

ࢀߟࢿྉ w UZQFMFWFMDBUT IUUQTHJUIVCDPNUZQFMFWFMDBUT w ೣ൪ IUUQFFETJODPNIFSEJOHDBUT