Minify Ruby Code

大阪Ruby会議04 (https://regional.rubykaigi.org/osaka04/)

Transcript

1. େࡕ3VCZձٞ 
   ౔ த೭ౡϑΣεςΟόϧλϫʔɾ΢Σετ ,PJDIJ
   *50
   
   &4.
   *OD .JOJGZ
   3VCZ
   $PEF Ruby Code Golf with Practical Code
2. @koic w044ϓϩάϥϚʔ
   w3VCP$PQίΞνʔϜίϛολʔ
   wגࣜձࣾӬ࿨γεςϜϚωδϝϯτ
   &4.
   *OD
   ΤϯδχΞϦϯάϚωʔδϟʔ
   
   σΟεςΟϯάΠογϡυɾΤϯδχΞ
3. 3VCZηϛφʔ౦ژ ೥݄೔ ۚ σϑΥϧτʹ͍ۙઃఆͰ͔͑ͬͯಡΈʹ͍͘मਖ਼Λ͍ͯ͠Δํ΁ͷώϯτΛ
5. Support OSS community
6. w !LPJD
   
   1BSTFS
   HFNίϛολʔ
   w !KVOL
   
   -SBNBίϛολʔ
   w !4)(".&-*/,4
   
   QBSTFZίϯτϦϏϡʔλ
   w !GVHBLLCO
   
   3#4ίϯτϦϏϡʔλ
   w ෦һืूதʂ ߏจղੳثݚڀ෦ IUUQTNBHB[JOFSVCZJTUOFUBSUJDMFT'PMMPX6Q,JSJTIJNB3VCZIUNM
8. .JOJGZ
   3VCZ
   $PEF ڝٕϓϩάϥϛϯάͰΈΔ 3VCZͷ๛͔͞ ʮಈ࡞͢Δ͖Ε͍Ͱ͸ͳ͍ίʔυʯͷ࿩ ࢓ࣄͰ͸ͦΜͳ໨ඪΛܝ͛·ͤΜͷͰ҆͝৺͍ͩ͘͞ d
   LPJD d
   IBSVHVDIJ
9. ʰ-3Ͱ+40/ύʔαʔΛ࡞Δʱ
   w d
   KVOL 1SFNJVN
   4QPOTPS w d
   IBSVHVDIJ
   w d
   LPJD "TL
   UIF
   4QFBLFST ग़ுʂߏจղੳثݚڀ෦ 4QPOTPS
   -5 ݚᮎ3VCZϓϩάϥϛϯά ٳܜ࣌ؒʹϒʔε ͰखചΓ͞Ε·͢ Կ࡭Ͱ΋ങ͓͏ʂ
10. ࠓ೔ͷ࿩
12. w ൃද࣌ͷ࠷৽ͷ3VCZͰ͋ΔEFWͱɺ 1SJTN
    ͷ࣍ͷ։ൃ൛Λલఏʹͯ͠·͢ ຊτʔΫʹ͓͚Δόʔδϣϯ $ ruby -rprism -ve 'p Prism::VERSION' ruby 3.4.0dev (2024-07-30T06:31:58Z master 1870505f47) [x86_64-darwin23] "0.30.0" # ݫີʹ͸0.31.0޲͚ͷ։ൃ൛ rbenv install 3.4-devͳͲͰ͓खݩʹΠϯετʔϧ
13.  .JOJGZͷݱ࣮ͱՄೳੑ
     1SJTN
    "1*ͱ-FYFS
     .JOJGZ
    3VCZ
    $PEF ໨࣍
14.  .JOJGZͷݱ࣮ͱՄೳੑ
15. w ιʔείʔυͷαΠζΛখ͘͢͞Δ
    w 8FCͷੈքͰ͸ɺ)5.-
    +BWB4DSJQU
    $44 ͳͲϦιʔεͷωοτϫʔΫసૹྔΛݮΒ͢
    w ϓϩάϥϛϯάݴޠͷ.JOJGZπʔϧͱͯ͠ɺ ྫ͑͹+BWB4DSJQUͰ͸6HJMJGZ+4
    5FSTFSͳͲ .JOJGZͱ͸ʁ
16. +BWB4DSJQUઌഐͰͷ.JOJGZྫ function greet(name) { console.log(`Hello! ${name}`); } greet("Osaka RubyKaigi 04"); // Hello, Osaka RubyKaigi 04! HSFFUKT $ npx terser greet.js function greet(name){console.log(`Hello! ${name}`)}\ greet("Osaka RubyKaigi 04"); .JOJGZ͢Δ
    εϖʔεͷ౎߹ʹ͖࣮ͭࡍ͸ߦ
17. w ಈ࡞͢ΔͨΊʹ
    ඞཁͷͳ͍
    εϖʔεɺվߦɺ
    ίϝϯτɺηϛίϩϯͷྨΛআڈ͢Δ
    w ϨΠΞ΢τ΍ߦؒΛ่͠ɺݟͨ໨Λ6HMJGZ͢Δ
    w ʮಈ࡞͢Δ͖Ε͍ͳίʔυʯͱҟͳΔՁ஋؍ ಈ࡞͢Δ୹͍ίʔυ $ npx terser greet.js | tee >(node) function greet(name){console.log(`Hello! ${name}`)} greet("Osaka RubyKaigi 04"); Hello! Osaka RubyKaigi 04 UFSTFSͷ݁ՌΛϓϩηεஔ׵Ͱ࣮ߦͨ݁͠Ռ
18. w ಉ͡ৼΔ෣͍ͳΒ୹͍ํ͕ྑ͍
    w ܭࢉػʹͱͬͯίʔυՄಡੑ͸ॏཁͰͳ͘ɺ ωοτϫʔΫసૹΛқ͘͢͠Δͷ͕࣮ફత
    w લड़ͷαϯϓϧίʔυͰ͸ʹѹॖ͞ΕΔ .JOJGZͷՁ஋؍ $ wc -c greet.js 120 greet.js $ npx terser greet.js | wc -c 80
19. w $PNQSFTT͸ɺෆཁͳεϖʔε΍ίϝϯτͷ ࡟আ΍ɺߏจͷ୹ॖԽʹΑͬͯɺϓϩάϥϜ ͷ͍ͨΔՕॴΛ୹͘͢Δ
    ຊฤ͸͜ͷҰ෦
    w .BOHMF͸ม਺໊΍ؔ਺໊Λ୹ॖ͢Δ
    w ಉ͡ৼΔ෣͍ͷ··ʮѹྗʯ͕ΑΓ
    ߴ͍ํ͕ɺΑΓՁ஋͋Δ୹͍ίʔυ $PNQSFTTͱ.BOHMF
20. ͦ΋ͦ΋ͳͥ .JOJGZ
21. w 3BJMTΞϓϦέʔγϣϯͷσϓϩΠΛಛఆͷ αʔόʔʹߦͳ͍ɺͦ͜ʹରͯ͠ϦΫΤετ ͕ूத͢Δݱ୅Ͱ͸ແԑ
    w ΋͠.JOJGZࡁΈίʔυ͕σϓϩΠ͞ΕΔͱɺ ໰୊͕ى͖ͨͱ͖ߦ൪߸͕ࢦ͔͢Β໰୊Օॴ ͷಛఆ͕ࠔ೉ʹͳͬͯࠔΔ
    ͦΕ͸ͦ͏ ݱ୅ͷ͓࢓ࣄ3VCZͩͱͲ͏ʁ
22. w ໝ૝ͦͷɻSVCZXBTNͷίʔυͰ֎෦Ϧιʔ εΛཁٻͨ͠ࡍʹɺ*4FRͳͲͷதؒදݱͰͳ͍ QMBJOͳ3VCZίʔυͷωοτϫʔΫసૹྔݮʁ
    w ໝ૝ͦͷɻΤοδίϯϐϡʔςΟϯάͰɺΤο δαʔόʔ $%/ ΍ΤοδσόΠε *P5 ΁ͷ
    ίϯςϯπ΍σʔλͷ഑෍ʹ͓͍ͯ༗༻ʁ ະདྷͷ͓࢓ࣄ3VCZͩͱͲ͏ʁ NJOJGZ͸1JDP3VCZͷϝϞϦ࡟ݮʹ࢖͑Δ͸ͣͳͷͰ஫໨͍ͯ͠·͢ɻ IUUQTYDPNIBTVNJLJOTUBUVT
23. w དྷ೥3VCZ,BJHJ
    
    দࢁ
    Ͱ53*$,
     ͕։࠵͞ΕΔΒ͍͠Ͱ͢Αʁ
    w ࢓ࣄ΍044Ͱ໨ࢦ͍ͯ͠Δʮಈ࡞͢Δ͖Ε͍ ͳίʔυʯͰ͸ͳ͍෯Λ࡞ΔػձॏཁͰ͸ʁ
    w .JOJGZ͢Δͷʹ͸ʮιʔείʔυͷղੳʯ͕ ඞཁͰͦΕ͸͢ͳΘͪɺ͍·ྲྀߦΓͷʂʁ དྷ೥ͷ3VCZΠϕϯτͩͱͲ͏ʁ
24. ߏจղੳث .BU[͸ݴ͍·ͨ͠
    ύʔαʔͱ($ͱίʔυδΣωϨʔλʹ͸ۙͮ͘ͳ
25.  1SJTN
    "1*Ͱιʔεղੳ
26. ࣈ۟ղੳͱߏจղੳͷར༻ྫ ࣈ۟ղੳ ߏจղੳ ੩తղੳ Ϩϙʔτ ιʔείʔυ ೖྗ ॲཧ ग़ྗ
27. w τʔΫϯྻ͸ιʔείʔυΛࠨ͔ΒӈʹಡΜͩ τʔΫϯͷ഑ྻ
    w ߏจ໦͸ϓϩάϥϜͷߏจߏ଄Λϊʔυͱͯ͠
    πϦʔߏ଄Ͱදݱ͍ͯ͠Δ
    w ྫ͑͹ΫϥεఆٛͷϊʔυͷԼʹϝιουఆٛͷ ϊʔυ͕͋ΔͳͲߏจ໦ͷํ͕๛͔ͳσʔλߏ଄ τʔΫϯྻͱߏจ໦
28. w γϯϘϧΛҾ਺ʹͨ͠ϝιουݺͼग़͠ τʔΫϯྻͷαϯϓϧ puts :hello [:IDENTIFIER, :SYMBOL_BEGIN, :IDENTIFIER, :EOF] puts : hello %w(foo) [:PERCENT_LOWER_W, :STRING_CONTENT, :STRING_END, :EOF] w ཁૉͻͱͭͷXϦςϥϧ %w( foo )
29. ߏจ໦ͷαϯϓϧ $ ruby -rprism -e 'p Prism.parse("42").value' @ ProgramNode (location: (1,0)-(1,2)) ├── flags: ∅ ├── locals: [] └── statements: @ StatementsNode (location: (1,0)-(1,2)) ├── flags: ∅ └── body: (length: 1) └── @ IntegerNode (location: (1,0)-(1,2)) ├── flags: newline, static_literal, decimal └── value: 42 Prism.parseͰPrism::ParseResultΛಘΔ
30. ߏจ໦
    ࠓճׂѪ ࠓ೔͖ͬͱۚࢠ͞Μ͕୔ࢁ࿩͍ͯ͠Δʂ
31. w 3VCP$PQͷΑ͏ʹߏจͷैଐؔ܎Λ૸ࠪ͠ ͯɺΦʔτίϨΫτͰߏจॻ͖׵͍͑ͨ͠Α ͏ͳέʔε͸ߏจ໦Λѻ͑ͳ͍ͱ೉͍͠
    w ࠓճͷ.JOJGZ࿩Ͱ͸جຊతʹߏจΛॻ͖׵͑ ͳ͍ͷͰɺτʔΫϯྻͰे෼ͱ͍͏൑அ τʔΫϯྻͱߏจ໦ͷ࢖͍෼͚ ͬ͘͟Γ͍͏ͱߏจߏ଄΁ͷॲཧ͢ΔͱͳͬͨΒߏจ໦͕ཉ͘͠ͳΔ
32. ࠓճ͸τʔΫϯྻ
33. w Ripper.lexͱPrism.lex͍ͣΕ΋ϓϩάϥϜ ͷτʔΫϯྻΛखʹೖΕΔ͜ͱ͕Ͱ͖Δ"1*
    w ͔ͤͬ͘ͳͷͰɺ·ͩ৘ใ͕গͳ͍1SJTNΛ࢖ͬ ͯΈͨํ͕͓΋͠Ζͦ͏
    ϓϩϙʔβϧతʹ΋
    w Prism.lex_ripperͱPrism.lex_compat͸ 3JQQFSʹ͍ۙ"1*͕ͩɺࠓճૉ௚ʹPrism.lex 3VCZͷτʔΫϯऔಘ"1*બఆ
34. 1SJTNMFYͷجຊ"1*
35. w Prism.lexϝιουͰղੳ݁ՌΛද͢
    Prism::LexResultΦϒδΣΫτΛಘΒΕΔ
    w 📝1SJTN
    ·ͰPrism::ParseLexResult Λޡͬͯฦͯ͠Δ
    ৄ͘͠͸SVCZQSJTN 1SJTNMFY require 'prism' result = Prism.lex('puts :hello') result.class #=> Prism::LexResult
36. w LexResult.valueͰτʔΫϯΛද͢ Prism::TokenͱMFY
    TUBUF CJU஋ ͷ഑ྻ֫ಘ
    w MFY
    TUBUF஋͸Լهࢀর ຊฤະ࢖༻ʹׂ͖ͭѪ 1SJTN-FY3FTVMU require 'prism' result = Prism.lex('puts :hello') result.value.class #=> Array result.value.first #=> [#<Prism::Token>, 32] IUUQTHJUIVCDPNSVCZQSJTNCMPCWJODMVEFQSJTNQBSTFSI--
37. w LexResult.valueͷ഑ྻͷୈҰཁૉ Prism::Token͸ܕɺ஋ɺҐஔ৘ใΛ࣋ͭ 1SJTN5PLFO result = Prism.lex('puts :hello') token, _state = result.value.first token.class #=> Prism::Token token.type #=> :IDENTIFIER token.value #=> "puts" token.location.class #=> Prism::Location
38. w ParseToken.locationͰτʔΫϯͷҐஔ ৘ใΛ࣋ͭPrism::LocationΛಘΒΕΔ 1SJTN-PDBUJPO result = Prism.lex('puts :hello') token, _state = result.value.first location = token.location location.first_line #=> 1 location.start_offset #=> 0 location.length #=> 4
39. τʔΫϯॲཧͷఆੴαϯϓϧ tokens = Prism.lex(source).value tokens.each_cons(2)do|(token,_),(next_token,_)| case token.type when :COMMENT # do_something when :IDENTIFIER # do_something end prev_token = token end FBDI@DPOT  Ͱ࣍ͷτʔΫϯ৘ใΛઌಡΈ͢Δ QSFW@UPLFOͰલͷτʔΫϯ৘ใΛอ͓࣋ͯ͘͠ ͜ͷ͋ͱ঺հ͢Δ.JOJGZ
    3VCZ͸͜ͷͭ͘Γ UPLFOUZQFͷछྨͰॲཧΛ൑ผ͢Δ ࠨ͔Βӈ΁ͷτʔΫϯྻͷϧʔϓ
40. ࣈ۟ղੳͱߏจղੳͷར༻ྫ ࣈ۟ղੳ ߏจղੳ ѹॖॲཧ ѹॖ͞Εͨίʔυ ιʔείʔυ ೖྗ ॲཧ ग़ྗ
41.  .JOJGZ
    3VCZ
    $PEF
42. github.com/koic/minifyrb
43. w minifyrbίϚϯυͰɺෆཁͳίʔυ෦෼ɺ ͭ·ΓτʔΫϯΛআڈͯ͠ίʔυΛѹॖ͢Δ .JOJGZ
    3VCZ
    HFN $ gem i minifyrb $ echo "puts :hello" | minifyrb puts:hello
44. 0SJHJOBM
    $PEF
45. .JOJ fi FE
    $PEF
46. ઃܭํ਑
47. w ͳͯ͘΋ྑ͍ۭന΍վߦΛۃྗআڈ͢Δ
    w ίϝϯτΛআڈ͢Δ
    w ඞཁʹԠͯ͡ηϛίϩϯʹΑΔϫϯϥΠφʔ
    w ม਺໊΍ϝιου໊Λ୹ॖ͢Δ.BOHMF͸
    ෳࡶʹͳΔͨΊߦΘͳ͍
    ࠓޙͷల๬࿮ ݱ࣌఺ͷجຊతͳߟ͑ํ
48. w {}ϕʔεͷߏจͱͳΔ+BWB4DSJQUͰ͸ྫ͑͹ functionΛҰߦͰෳ਺ఆٛͰ͖Δ +BWB4DSJQUͷϫϯϥΠφʔʹֶͿ $ cat example.js | tee >(npx terser) function foo() { console.log(bar()); } function bar() { 42; } function foo(){console.log(bar())}function bar(){42} εϖʔεɺηϛίϩϯෆཁ ಡΈ΍͢͞ͷվߦΛ͢Δ
49. w FOEϕʔεͷߏจͱͳΔ3VCZͰ͸ྫ͑͹վߦ Ληϛίϩϯʹஔ͖׵͑ͯ΋ɺ݁ہόΠτ ͷαΠζֻ͕͔Δ͜ͱ͸มΘΒͳ͍
    w FOE͸^ͱൺ΂ɺ۠੾Γεϖʔε͕ඞཁ͔൑அ
    w ౰ॳ͸σόοά࣌ͷߦ൪߸Λ஌ΔҙຯͰ΋ɺ ෳ਺ߦͷ··Ͱྑ͍ͱ͍͏τϨʔυΦϑ൑அ 3VCZͷϫϯϥΠφʔ
    ِ 1όΠτ
50. w FOEϕʔεͷߏจͱͳΔ3VCZͰ͸ྫ͑͹վߦ Ληϛίϩϯʹஔ͖׵͑Δͱɺ8JOEPXTͳΜ ͔ͷaSaOͷόΠτվߦ͸όΠτʹݮΒͤΔ
    w .JOJGZͱ͍͏ํ਑ʹ͓͚ΔτϨʔυΦϑ൑அ͸ ໰୊௥੻ੑΑΓ΋୹͍ίʔυΛऔΔ
    w ݁Ռͱͯ͠෭࡞༻ʹएׯͷ೉ಡԽ͕͍͖ͭͯͨ 3VCZͷϫϯϥΠφʔ
    ਅ
51. Prism.lex͸&SSPS
    5PMFSBODFʹͳͬͯΔ &SSPS
    5PMFSBODF $ ruby -ce 'cond(arg)?x:y' # εϖʔεͳ͠ѹॖ͸ߏจΤϥʔͷྫ -e:1: syntax error, unexpected symbol literal, expecting 'do' or '{' or '(' cond(arg)?x:y ruby: compile error (SyntaxError) $ ruby -ce 'cond(arg)?x: y' # ͜ͷ৔߹:ͱyͷؒʹཁεϖʔε Syntax OK $ ruby -rprism -e "p Prism.lex('cond(arg)?x:y').value" [[#<Prism::Token:0x0000000104c87b70 @source=#<Prism::ASCIISource:0x000000011f7f5dd0 ͍ͭ͜ಈͧ͘ʂ
52. w .JOJGZ͸-41ͷΑ͏ͳೖྗ్தͷίʔυΛॲཧ ͢Δ΋ͷͰ͸ͳ͍
    w ಈ͔ͳ͍ίʔυΛ.JOJGZͯ͠΋࢓ํͳ͍ͷͰɺ ݩίʔυ͕ߏจΤϥʔͷͱ͖͸Τϥʔͱͨ͠
    w Prism.lex(code).errorsͷ݁Ռ഑ྻ΍ Prism.parse_success?Ͱ஌Δ͜ͱ͕Ͱ͖Δ &SSPS
    5PMFSBODF΁ͷ൑அ Prism::ParseLexResult#errors
53. τʔΫϯॲཧͷ࣮૷
54. w *(/03&%@/&8-*/&
    
    ଥ౰ͳγϯλοΫ εͰ͋ΔͨΊʹෆඞཁͳվߦ
    ୯ʹ࡟আՄೳ
    w /&8-*/&
    
    ଥ౰ͳγϯλοΫεͰ͋Δͨ Ίʹඞཁͳվߦ
    ୯ʹ࡟আ͢ΔͱߏจΤϥʔ छྨͷվߦτʔΫϯ ݱࡏͷ1SJTN
    
    ࣮૷ͩͱظ଴ͱҧ͏෦෼΋͋Γޙड़
55. w ͜ͷվߦ͕ͳ͘ͳͬͯ΋ߏจͱͯ͠ଥ౰Ͱ͋Δ
    w ηϛίϩϯͳ͠Ͱվߦ࡟আ͸Ͳ͜·ͰͰ͖Δʁ *(/03&%@/&8-*/&τʔΫϯ begin rescue CustomError=>e else ensure end ݩ͸όΠτ
    aOͷ৔߹ begin rescue CustomError=>e else ensure end *(/03&%@/&8-*/&ద༻
    όΠτ begin rescue CustomError=>e;else ensure end ࢀߟ
    ผ్ηϛίϩϯஔ׵
    όΠτ
56. w ʮಈ࡞͢Δ͖Ε͍Ͱ͸ͳ ͍ίʔυʯ͕ຊτʔΫͷ ςʔϚͰ͢Α
    w .JOJGZͱ53*$,೴͸ີ઀ ʹؔ࿈͢ΔԾઆ
    w 53*$,
    ͷLJOBCB͞ Μ࡞඼ͷཧղʹ͚ۙͮΔʁ ͜ͷτʔΫϯ͔ΒಘΒΕΔֶͼ IUUQTHJUIVCDPNUSJDUSJDLCMPCNBTUFSLJOBCBFOUSZSC 53*$,໊࡞ͷͻͱͭ
57. w "\r\n"͔΋͠Εͳ͍վߦΛ۠੾ΓτʔΫϯʹ ͢Δ͜ͱͰόΠτ਺ΛݮΒͤΔՄೳੑ͕͋Δ
    w *(/03&%@/&8-*/&ͱҧ͍ɺdef foo͕ deffooʹͳΒͳ͍Α͏దٓ۠੾Γௐ੔͕ඞཁ
    w ࣍τʔΫϯͷܕ͕&0'ͷ৔߹͸104*9४ڌͷ ςΩετϑΝΠϧͱ͢ΔͨΊվߦΛҡ࣋͢Δ /&8-*/&τʔΫϯ
58. 104*9४ڌҧ൓👮 (JU)VCͷΞϨ /&8-*/& &0'
59. w BMJBT
    FRM
    ͕BMJBT
    FRM ͸ߏจΤϥʔ
    w GPP
    'PP͕GPP 'PP͸ҙຯ͕มΘΔ
    w
    BSSBZ͕ BSSBZ͸ߏจΤϥʔ
    w GPP
    X B
    C
    D ͕GPPX B
    C
    D ͸ҙຯ͕มΘΔ
    w GPP
    X B
    GPS
    C ͕GPPX B
    GPS
    C ͸ߏจΤϥʔ ݁߹ͯ͠͸͍͚ͳ͍γϦʔζͷҰ෦ unexpected char literal unexpected operator assignment unexpected ')'
60. w ด͡Χοίલͷվߦ͸IGNORED_NEWLINEʹͰ͖Δ ͸͕ͣͩɺΧϯϚͳͩ͠ͱNEWLINEͱ͞ΕΔ
    ҙਤతͳ3JQQFSޓ׵ɺSVCZQSJTNࢀর
    w ;΁ͷ୯७ͳஔ׵͸[foo, bar, baz;]ͷߏจΤϥʔ <ิ଍>୯७ͳηϛίϩϯஔ׵͸ෆՄ [ foo, bar, baz ] :BRACKET_LEFT_ARRAY,:IGNORED_NEWLINE :IDENTIFIER, :COMMA,:IGNORED_NEWLINE :IDENTIFIER, :COMMA,:IGNORED_NEWLINE :IDENTIFIER, :NEWLINE :BRACKET_RIGHT, :NEWLINE, :EOF
61. վߦͷτʔΫϯॲཧ֓ཁ tokens.each(2) do |(token, _), (next_token, _)| case token.type when :IGNORED_NEWLINE # noop when :NEWLINE token_value = if next_token.type == :EOF token.value elsif CLOSING_DELIMITER_TYPES.include?(next_token.type) # noop else ';' end 104*9ͷΞϨ΁ͷOFXMJOFରԠ Ճ͑ͯɺdeffooͳͲ༧໿ޠ͕݁߹͠ͳ͍Α͏ͳॲཧΛผ్͍ͯ͠Δ
    >
    ^ͷτʔΫϯͷఆ਺ɻຊདྷ*(/03&%@/&8-*/&͔΋ͳύον
62. w )&3&%0$@45"35ͱ)&3&%0$@&/%ͷ τʔΫϯʹғ·ΕͨτʔΫϯ͕ຊจ )&3&%0$@ 45"35c&/% τʔΫϯ <<HEREDOC text HEREDOC [:HEREDOC_START, :STRING_CONTENT, :HEREDOC_END, :NEWLINE, :EOF]
63. w γϯϓϧͳώΞυΩϡϝϯτͳΒ )&3&%0$@45"35͔Β)&3&%0$@&/%· ͰͷτʔΫϯ஋Λ݁߹͢Ε͹ऴΘΓͦ͏
    w τʔΫϯྻ͸ιʔείʔυΛࠨ͔ΒӈʹಡΜ ͩ݁Ռͷ഑ྻͱݴͬͨͳʁ ώΞυΩϡϝϯτ
64. w :DOT, :IDENTIFIER͸:HEREDOC_STARTʹ
    ଓ͘τʔΫϯͰ͸ͳ͍
    w ώΞυΩϡϝϯτΛจࣈྻϦςϥϧͷҰछͩͱࢥ ͑͹
    "text".do_something
    ͳͷͰͦΕ͸ͦ͏ )&3&%0$EP@TPNFUIJOH <<HEREDOC.do_something text HEREDOC [:HEREDOC_START, :STRING_CONTENT, :HEREDOC_END, :DOT, :IDENTIFIER, :NEWLINE,:EOF]
65. w ୹͍όΠτ਺ʹ͢Δํ਑ʹج͖ͮIFSFEPD͸ จࣈྻϦςϥϧʹஔ׵͢Δ͜ͱͱͨ͠
    w )&3&%0$@45"35͔Β)&3&%0$@&/%· Ͱ͸ώΞυΩϡϝϯτͰ͋Γɺdͷ৔߹͸ IFSFEPDऴྃͰEFEFOU͢ΔΑ͏ঢ়ଶΛอͭ )&3&%0$EP@TPNFUIJOH <<HEREDOC.do_something text HEREDOC " text"
66. IFSFEPDͷτʔΫϯॲཧ֓ཁ tokens.each(2) do |(token, _), (next_token, _)| case token.type when :HEREDOC_START @in_heredoc = true squiggly_heredoc = token.value.start_with?('<<~') # SNIP: <<'HEREDOC', <<"HEREDOC", <<`HEREDOC`΁ͷॲཧׂѪ when :HEREDOC_END heredoc_contents = @heredoc_content_tokens.join # SNIP: <<~΁ͷdedentॲཧΛׂѪ @minified_values << heredoc_contents @minified_values << (@string_quote == '`' ? '`' : '"') @heredoc_content_tokens.clear @in_heredoc = false IFSFEPDதͷτʔΫϯॲཧΛ༗ޮԽ IFSFEPDதͷτʔΫϯॲཧΛແޮԽ EFEFOUॲཧ͕ඞཁ͔ঢ়ଶΛ࣋ͨͤΔ IFSFEPD͸ແҹҎ֎ΫΥʔτ͕ͱ͓Γ IFSFEPDຊจͷτʔΫϯ஋ͷ഑ྻΛ݁߹
67. ͢΂ͯΛ෺ޠΔλΠτϧɻࠓճͷHFN͸IFSFEPD͕ਖ਼௚·ͩόΪʔ IUUQTTQFBLFSEFDLDPNZVJ@LOLIFSFEPDJOEFNPODBTUMF
68. ࠓޙͷ֦ுʹ޲͚ͨ஫ҙ఺ def m(a) bar unless cond end def m(a)bar unless cond end w Ҿ਺Χοί͋Γͷɺվߦ΍ηϛίϩϯͳ͠Ͱॻ͚ΔFOE͋Γͷ ϫϯϥΠφʔϝιουఆٛʹ͍ͭͯߟ͑Δ ಉ͡ߏจ໦
69. FOEMFTT
    EFGͱ͸ߏจ͕ҟͳΔ w .BOHMJOHΛߟ͑Δ৔߹͸-FYFSτʔΫϯΑΓ ߏจ໦Ͱͷॲཧ͕޲͍͍ͯΔ͔΋ def foo(a)=bar unless cond def foo(a)bar unless cond end ҟͳΔߏจ໦
70. ެ։ ͜ΜͳࢥߟΛͭͭ͠Ͱ͖·ͨ͠
71. # Original $ find . -name '*.rb' -type f -print0 | \ xargs -0 wc -c | awk 'END{print $1}' 49825 # Original $ find . -name '*.rb' -type f -print0 | \ xargs -0 wc -c | awk 'END{print $1}' 49825 # Minify $ bundle exec rake minify $ find . -name '*.rb' -type f -print0 | \ xargs -0 wc -c | awk 'END{print $1}' 31598 # Original $ find . -name '*.rb' -type f -print0 | \ xargs -0 wc -c | awk 'END{print $1}' 49825 # Minify $ bundle exec rake minify $ find . -name '*.rb' -type f -print0 | \ xargs -0 wc -c | awk 'END{print $1}' 31598 # Ratio $ ruby -e 'p 31598 / 49825.0' 0.6341796287004515 .JOJGZͰͲΕ͘Β͍ݮΔʁ
72. w MJC͸ όΠτ͔Β όΠτʹͳΓɺ
    TQFD͸ όΠτ͔Β όΠτʹ ͳΔ
    w ͭ·Γ࡟ݮ͞Εͨίʔυ͸34QFDͷํ͕ߴ͍
    w ࣮ફత
    ͱ͸ʁ
    ʹ͸ϓϩμΫτίʔυ΁ͷޮ Ռ͕ߴ͍ํ͕͍͍Μ͚ͩͲݱ࣮͸͜͏Β͍͠ ଌఆͱධՁΛ΋͏গ͠
73. github.com/koic/minifyrb gem install minifyrbͰ༡ΜͰΈͯͶ
74. ͓΅͍͑ͯ·͔͢ʁ
75. @koic w044ϓϩάϥϚʔ
    w3VCP$PQίΞνʔϜίϛολʔ
    wגࣜձࣾӬ࿨γεςϜϚωδϝϯτ
    &4.
    *OD
    ΤϯδχΞϦϯάϚωʔδϟʔ
    
    σΟεςΟϯάΠογϡυɾΤϯδχΞ
76. One More Thing
77. " ࠞಱͱடং
78. .JOJGZͨ͠ίʔυͱ
    ΋ͬͱٔΕΔ
79. w ೉ಡԽʹର͢Δ෮߸ԽΈ͍ͨͳ΋ͷ
    w ͓࢓ࣄʹݶΒͣɺ;ͩΜ͸ΈΜͳߦّͷྑ͍ ίʔυΛແҙࣝʹ໨ࢦͯ͠͠·͍·͢ΑͶʁ
    w 3VCP$PQͷΦʔτίϨΫτͱ͍͏
    ϑΥʔϚολʔͷྗͷ࠶ൃݟ .JOJGZͰյͯ͠3VCP$PQͰ௚͢ .JOJGZͨ͠ίʔυ͕Ͳ͏෮ݩͰ͖Δ͔ڵຯΛ࣋ͪ·͢ΑͶʁ
80. w .JOJGZͱ3VCP$PQͱ͍͏ࠞಱ͔Βͷ૑଄
    w 3VCP$PQͷΤοδέʔεॲཧʹ͍ͭͯɺ NJOJGZͨ͠ίʔυΛݩʹ͢Ε͹؆୯ʹҧ൓͋ ΓͷίʔυΛ࡞ΕΔΑ͏ʹͳͬͨ
    w .JOJGZ͚ͩͰͳ͘3VCP$PQͷࣗಈमਖ਼όά ΋ݟ͚ͭͯ௚͢ػձʹͳ͍ͬͯΔ .JOJGZ։ൃͷࢥΘ͵෭࡞༻
81. 0SJHJOBM
    $PEF
82. .JOJ fi FE
    $PEF
83. "VUPDPSSFDUFE
    $PEF .JOJGZͷத֩ͷίʔυΛ.JOJGZͯ͠ɺͦͷ͋ͱ3VCP$PQͰϑΥʔϚοτ
84. %&.0
85. w ࠓճͷ෮߸ԽσϞͷͨΊʹ΋͍͔ͭ͘௚ͨ͠
    w ;ͭ͏ਓ͸ॻ͔ͳ͍ϫϯϥΠφʔʹରͯ͠ɺ 3VCP$PQ͸࿬͕؁͍
    ͦΕ͸ͦ͏
    w .JOJGZ͸ແݶʹ໰୊ΛᖰΓग़ͨ͢Ίͷڰؾͷ ڟث͔΋͠Εͳ͍ ਓ͕ॻ͔ͳ͍ίʔυΛಘΔ ਓ͸৘ཧͰ͖Ε͍ͳίʔυΛॻ͜͏ͱ͢Δ͕ɺϓϩάϥϜ͸ࢦࣔ௨Γಈ͚ͩ͘
86. PTSL@FGGFDU
    Ϛονϙϯϓͷ׬੒ .JOJGZΛ࡞ͬͨΒ3VCP$PQͷࣗಈमਖ਼ΫΦϦςΟ͕͕͋ͬͨ
87. l ੒ख़ͨ͠จԽɺྫ͑͹ԻָͰ΋ָේΛٯ͞ʹͯ͠ ΋஄͘͜ͱ͕Ͱ͖ΔԻָͱ͔ͦ͏͍͏΋ͷ͕͋ͬ ͯɺ
    தུ
    ੒ख़ͨ͠จԽʹ͸͜͏͍͓ͬͨ༡ͼ ͕ൃల͍ͯͯ͠ɺϓϩάϥϛϯάͱ͍͏෼໺΋
    ੒ख़ͨ͠จԽʹͳ͍ͬͯΔͱ͍͑ΔΜͰ͔͢Ͷ !LJOBCB TRICK 2018 (FINAL) ʹͯ
88. Կͷ໾ʹ΋ཱͨͳ͍
    ϓϩάϥϜΛָ͠ΉจԽ IUUQTXXXZPVUVCFDPNXBUDI W5#ON((VV