Save 37% off PRO during our Black Friday Sale! »

Polishing on "Polished Ruby Programming" #kaigionrails / kaigionrails 2021

34fcd5f1deeb25b1138e9845137feb6e?s=47 Shintaro Kakutani
October 22, 2021
980

Polishing on "Polished Ruby Programming" #kaigionrails / kaigionrails 2021

Recorded Video: https://youtu.be/EJuKeX7k2rY

Ruby is Nice so We are Nice
https://speakerdeck.com/kakutani/ruby-is-nice-so-we-are-nice
https://youtu.be/NctyqVznddg, https://youtu.be/P7AunfXSOTQ

Polished Ruby Programming
https://www.packtpub.com/product/polished-ruby-programming/9781801072724

Jeremy Evans
https://github.com/jeremyevans
https://twitter.com/jeremyevans0

Lambda Note
https://www.lambdanote.com

n月刊ラムダノート 既刊5冊セット(電子書籍のみ) – 技術書出版と販売のラムダノート https://www.lambdanote.com/collections/frontpage/products/nmonthly-5set-2021-ebook

RubyでつくるRuby ゼロから学びなおすプログラミング言語入門(PDF版のみ) – 技術書出版と販売のラムダノート https://www.lambdanote.com/collections/frontpage/products/ruby-ruby-ebook

エクストリームプログラミング【委託】 - 達人出版会
https://tatsu-zine.com/books/extreme-programming

僕らはエクストリームプログラミングのかけら
https://speakerdeck.com/kakutani/xpmatsuri2019-keynote

Optimizing Partial Backtraces in Ruby 3 by Jeremy Evans - RubyKaigi Takeout 2021
https://rubykaigi.org/2021-takeout/presentations/jeremyevans0.html

Polished Ruby Programming (Amazon.com)
https://www.amazon.com/dp/1801072728

Polished Ruby Programming (Amazon.co.jp)
https://www.amazon.co.jp/dp/B093TH9P7C

Ruby Archaeology by Nick Schwaderer - RubyKaigi Takeout 2021
https://rubykaigi.org/2021-takeout/presentations/schwad4hd14.html
Ruby Archaeology
https://schwaderer-kaigi-2021.herokuapp.com/#33

前提知識が多い。すごくおおい → 最後にまとめて掲載

Rubyist Magazine 0028 号 巻頭言
https://magazine.rubyist.net/articles/0028/0028-ForeWord.html

ワタシハ ルビーカイギ チョットデキル / I can organize RubyKaigi a little
https://speakerdeck.com/kakutani/i-can-organize-rubykaigi-a-little

マッドマックス 怒りのデス・ロード (2015) - IMDb
https://www.imdb.com/title/tt1392190/

日本Rubyの会とは | 一般社団法人 日本Rubyの会
https://ruby-no-kai.org/

RubyKaigi Takeout 2021
https://rubykaigi.org/2021-takeout

RubyConf 2021
https://rubyconf.org/

Rubyにとって決定的に足りないものは何だと思いますか?
https://qr.ae/pGVdZc

状況に埋め込まれた学習―正統的周辺参加 Jean Lave, Etienne Wenger
https://www.amazon.co.jp/dp/4782800843

Kaigi on Rails 2021
https://kaigionrails.org/2021/

FJORD BOOT CAMP(フィヨルドブートキャンプ)
https://bootcamp.fjord.jp/

Ginza Rails27 igaiga - Speaker Deck
https://speakerdeck.com/igaiga/ginza-rails27-igaiga?slide=9

Jeremy Evans on Twitter: "Weighing in at 434 pages, "Polished Ruby Programming" will be available for sale on July 9. Currently, it is the #1 New Release in Ruby Computer Programming! This would probably be more impressive if there was more than one new release. :) https://t.co/wFRn4yHbVC @PacktPub" / Twitter
https://twitter.com/jeremyevans0/status/1407513414646198279

Junya Ogura on Twitter: "池袋のジュンク堂、ついにPythonコーナーが独立した。 https://t.co/nAgaXMnBEz" / Twitter
https://twitter.com/junya/status/1437704432372781060

Amazon.co.jp: 角谷 信太郎:作品一覧、著者略歴 https://www.amazon.co.jp/%E8%A7%92%E8%B0%B7%E4%BF%A1%E5%A4%AA%E9%83%8E/e/B0051LA12K

Kakutani Shintaro on Twitter: "売れる本を書けば本は売れる(迫真" / Twitter https://twitter.com/kakutani/status/1382919795939549184

前提知識がおおい。すごくおおい:

WEB+DB PRESS総集編[Vol.1~120]
https://gihyo.jp/book/2021/978-4-297-12215-7

メタプログラミングRuby 第2版
https://www.oreilly.co.jp/books/9784873117430/

オブジェクト指向設計実践ガイド ~Rubyでわかる 進化しつづける柔軟なアプリケーションの育て方
https://gihyo.jp/book/2016/978-4-7741-8361-9

リファクタリング 既存のコードを安全に改善する(第2版)
https://tatsu-zine.com/books/refactoring-2ed

テスト駆動開発
https://tatsu-zine.com/books/test-driven-development

実践テスト駆動開発 テストに導かれてオブジェクト指向ソフトウェアを育てる
https://www.shoeisha.co.jp/book/detail/9784798124582

Rubyのしくみ Ruby Under a Microscope
https://tatsu-zine.com/books/ruby-under-a-microscope-ja

Clean Architecture 達人に学ぶソフトウェアの構造と設計
https://tatsu-zine.com/books/clean-architecture

リーダブルコード
https://www.oreilly.co.jp/books/9784873115658/

Rubyソースコード完全解説(全文)
https://i.loveruby.net/ja/rhg/book/

Java言語で学ぶデザインパターン入門 第3版
https://www.hyuki.com/dp/

Specification by Example
https://www.manning.com/books/specification-by-example

The RSpec Book
https://www.shoeisha.co.jp/book/detail/9784798121932

The Well-Grounded Rubyist, Third Edition,
https://www.manning.com/books/the-well-grounded-rubyist-third-edition

Exceptional Ruby: Master the Art of Handling Failure in Ruby
https://pragprog.com/titles/ager/exceptional-ruby/

Ruby Performance Optimization: Why Ruby Is Slow, and How to Fix It https://pragprog.com/titles/adrpo/ruby-performance-optimization/

Rubyによるデザインパターン
https://www.amazon.co.jp/dp/4894712857

明解!Ruby―奥深いRubyの文化を身に付けるテクニック
https://www.amazon.co.jp/dp/4864011095

ドメイン特化言語 パターンで学ぶDSLのベストプラクティス46項目
https://www.amazon.co.jp/dp/4864010471

34fcd5f1deeb25b1138e9845137feb6e?s=128

Shintaro Kakutani

October 22, 2021
Tweet

Transcript

  1. !LBLVUBOJ 
 0DU LBJHJPOSBJMT POLISHING ON POLISHED RUBY 
 PROGRAMMING

  2. ֯୩৴ଠ࿠ @kakutani 
 Rubyist-ist, Keeb zombie⌨🧟 Ұࣾ ೔ຊ3VCZͷձཧࣄ ג Ӭ࿨γεςϜϚωδϝϯτސ໰

    
 ϑΟϤϧυϒʔτΩϟϯϓސ໰ ϝΧχΧϧΩʔϘʔυεΠον५׈ऀ
  3. 3VCZJTUJTUͱ͸

  4. https://speakerdeck.com/kakutani/ruby-is-nice-so-we-are-nice 📺IUUQTZPVUVCF/DUZR7[OEEH 📺IUUQTZPVUVCF1"VOG94052

  5. https://www.packtpub.com/product/polished-ruby-programming/9781801072724 ݪஶͷిࢠॻ੶͸,JOEMFͰ΋ങ͑Δ͚Ͳɺ1BDLUͷ௚ൢͰങ͏ͱ %3.'SFFͷ1%'౳ΛೖखͰ͖Δ͔Β௚ൢ͕͓͢͢Ίͩκ😆📚 

  6. +FSFNZ͸3VCZ$PNNJUUFSͰɺ3VCZ,BJHJͷ,FZOPUF4QFBLFSͰ͋ΓɺCVHTSVCZMBOHPSHͷνέο τΛ௚͠·ͬͯ͘3VCZ1SJ[FΛड৆͍ͯ͠ΔΑɻ$PNNJUUFSͱͯ͠͸৽͠Ίͷ3VCZJTU͚ͩͲɺ3VCZ,BJHJ ʹॳΊͯొஃͨ͠ͷ͸3VCZ,BJHJͱ͍͏ݹࢀͳͷͩɻ4FRVFM΍3PEBͳͲΛ΋Γ΋Γϝϯςφϯε͍ͯ͠ΔΑ

  7. Lambda Note

  8. ʰݚᮎ3VCZϓϩάϥϛϯάʱ Ծ 
 ࢮܐࣥߦத ຋༁ਐߦத ೥ཅय़ ༧ఆ  ֯୩৴ଠ࿠༁ϥϜμϊʔτࣾץο ೥݄ిॻЌ൛ൢച։࢝ر๬

    ر๬ 
 ϖʔδ<্࢙࠷ް>͋ΔͷͰ࣌ؒΛ͍ͩ͘͞ʜ
  9. https://www.lambdanote.com/collections/frontpage/products/ruby-ruby-ebook

  10. ⁋ຊ͞ΜͷʮύλʔϯϚονJO3VCZʯ ݱঢ়ͱ͸গ͠࢓༷͸มΘ͍ͬͯΔ͚Ͳlͳͥz͕ॻ͔Ε͍ͯΔ͔ΒλΠϜϨε ͩ ΍ɺ֏͞ΜͷʮE3VCZͰָ͠Ή෼ࢄΦϒδΣΫτʯɺNBNFUUFSͷʮʰίϧʔνϯʱͱ͸Կͩͬͨͷ͔ʁʯʮʰܧ ଓʱͷͻΈͭʯͱ͍ͬͨ3VCZJTUͷدߘ΍ͳΜ͔೉͠Ίιϑτ΢ΣΞ͕ΒΈͷ࿩͕ͨ͘͞ΜಡΊ͓ͯಘR https://www.lambdanote.com/collections/frontpage/products/nmonthly-5set-2021-ebook

  11. ങͬͯ͘ ΕR

  12. ໨త

  13. lզʑ͸ɺιϑτ΢ΣΞ։ൃʹ͓͍ͯ৽ͨͳࣾձߏ଄ Λ࡞Γग़͠ɺͦͷͳ͔ で ٕज़తͳߴΈͱ ビジ ωεͷ ビ ジ ϣϯΛ݁ び

    ෇͚ɺಠࣗͷ バ ϦϡʔΛ࣋ͬͨ プ ϩ ダ Ϋ τ΍αʔ ビ εΛੜΈग़͢ػձΛ͍࣋ͬͯΔɻ 
 ͜Ε が զʑͷڧΈ だ ɻ ɹ91ͷ੒ޭ͸ɺ৴པ で ͖Διϑτ΢ΣΞͷ͢ ば ΍͍ ݟੵΓɺ࣮૷ɺ デプ ϩΠ がで ͖Δ༏लͳ プ ϩ グ ϥϚʔ ͷ૿Ճʹ͔͔͍ͬͯΔɻ ڧௐ౳͸Ҿ༻ऀʹΑΔ
  14. https://speakerdeck.com/kakutani/xpmatsuri2019-keynote ͜Ε͸ߨԋͷͱ͖ͷഎܠը૾͔͠࢒ͬͯͳͯ͘͝ΊΜ΍Ͱʜ

  15. https://www.packtpub.com/product/polished-ruby-programming/9781801072724

  16. “This book is aimed at intermediate Ruby programmers and focuses

    on teaching principles of Ruby programming, as well as trade-offs to consider when making implementation decisions. !"#$%&'()*+,-./0123456)*+,-./078/(9:;%< =>?@ABCD(EF2GHIAJKLM;3NOAPQ6QRCS — Jeremy Evans (RubyKaigi Takeout 2021)
  17. Polished Ruby Programming #ŪŰ w ίϛϡχςΟͷlेશత࣮ફऀzʹΑΔٱͼ͞ͷେܕॻ੶ w ෦ߏ੒ શষ 3VCZରԠ

    w ୈ෦3VCZͷlجૅz ϝιουҾ਺ʹҟ༷ʹ͘Θ͍͠  w ୈ෦࣮ફͷlݪଇͱτϨʔυΦϑz w ୈ෦+FSFNZͷओுP ff UIF3BJMT %# 8FC ηΩϡϦςΟ  w ϖʔδ จষͱίʔυ͔͠ͳ͍ ͔ͨ͘ͳʹਤ͕ແ͍  w l8PSL $PSSFDU 'VOʜBOE'BTUz w αϯϓϧίʔυ͕པ΋͍͠ པ΋͗͢͠Δ͔΋😂
  18. album_artists = {} album_track_artists = {} album_infos.each do |album, track,

    artist| (album_artists[album] ||= []) << artist (album_track_artists[[album, track]] ||= []) << artist end album_artists.each_value(&:uniq!) པ΋͍͠αϯϓϧίʔυͷ͘͝؆୯ͳྫ )BTIͷΤϯτϦʹ഑ྻΛ֨ೲ͢ΔࡍʹɺΤϯτϦ͕OJMͷ৔߹͸ۭ഑ྻͰॳظԽ͔ͯ͠ΒཁૉΛ௥Ճ ͢Δͷ͸ߦͰॻ͚ͯ΂ΜΓɺͱ͍͏͜ͱʹ͍ͭͯಛʹຊจͰઆ໌ෆཁͳͷ͕ର৅ಡऀͷதڃऀͩΑ 
 ଞʹ΋ɺsuper ͷ࢖͍ํ͕΍ͨΒͱ্खͳͷ͕ҹ৅ʹ࢒Γ·ͨ͠ɻࢀߟʹͳΔ😵💫
  19. 3VCZ্ڃऀͷϨϏϡʔ  ʮ͍͍ͩͨ஌ͬͯͨʯ Ͱ͠ΐ͏Ͷ https://www.amazon.com/dp/1801072728

  20. 3VCZ্ڃऀͷϨϏϡʔ  ͜Ε͸੢ౢ͞ΜͰ͸ʁlॳֶऀͷਓ͸ؾܰʹ࣭໰Ͱ͖Δ্ڃऀΛ୳ͨ͠΄͏͕͍͍Αz ΍͍͞͠ https://www.amazon.com/dp/1801072728

  21. 3VCZ্ڃऀͷϨϏϡʔ  https://www.amazon.co.jp/dp/B093TH9P7C ʮ͜ͷͻͱΊͬͪΌ3VCZίϛϡχ ςΟʹ͘Θ͍͠ͳʯͱࢥͬͨΒɺ 
 ϑΝχʔτͰͨ͠

  22. Polished Ruby Programming #?? w ίʔσΟϯάελΠϧ͕ŧŔŕŪŝŬūſʜ w checkϝιουͩ ௚આ๏Ͱͳ໋͘ྩ๏ʜͬͯŠŪ 

    w do…end͔ΒͷϝιουνΣΠϯ͕ؾʹͳͬͪΌ͏ 
 ࢲ͸l5IF8FJSJDI$POWFOUJPOz೿ͳͷͰʜ  w ৘ใݯ͕লུ͞Ε͕ͪͳͷ͕ŝŬūſʜ एׯŰŘŠƃũŝţŪ͔΋  w 3VCZରԠʜແŰƅŦŖƃŵŕŧ ແ3BDUPS ແ3F fi OFNFOUT w લఏ஌͕͓͓͍ࣝɻ͓͓͍͘͢͝
  23. “The Weirich Convention” https://schwaderer-kaigi-2021.herokuapp.com/#33 ͘Θ͘͠͸3VCZ,BJHJ5BLFPVUͷ!TIXBEͷl3VCZ"SDIBFPMPHZzΛ؍ͯͶ 
 IUUQTSVCZLBJHJPSHUBLFPVUQSFTFOUBUJPOTTDIXBEIEIUNM do…end ͸खଓ͖తϒϩοΫʹ࢖͏ͱ໌ࣔతʹݴͬͨͷ͸"WEJͳͷ͔ͳ

  24. લఏ஌͕͓͓͍ࣝɻ͓͓͍͘͢͝ɻ

  25. ૊ΈࠐΈΫϥε ม਺ ϝιουҾ ਺ ྫ֎ॲཧ ಠࣗΫϥεઃܭ  3VCP$PQ Ϟδϡʔϧ ϝλϓϩ

    άϥϛϯά %4- ςετ ΠσΟ ΦϚςΟοΫ3VCZ ϦϑΝΫλϦ ϯά σβΠϯύλʔϯ ࠷దԽʜ
  26. ༁ॻઈ൛ ༁͕ඍົ ະ༁ॻ੶ ݹ͍ େ෦ͳͷ΋ڍ͛ͯ·͢ ৭͕ബ͍΍ͭ 
 8&# %#13&44͸LPͷ࿈ࡌl3VCZͷ΢ϥΨϫz͕ඞಡd 


    ૯ूฤʹશ෦͸ऩ࿥͞Εͯͳ͍ͷͰԿ߸͔ݸผͰങ͏ 
 ʰ3VCZιʔείʔυ׬શղઆʱ 3)( ͸΢ΣϒͰશจಡΊ·͢
  27. ʰݚᮎ3VCZϓϩάϥϛϯάʱ Ծ 
 ࢮܐࣥߦத ຋༁ਐߦத ೥ཅय़ ༧ఆ  ֯୩৴ଠ࿠༁ϥϜμϊʔτࣾץο ೥݄ిॻЌ൛ൢച։࢝ر๬

    ر๬ 
 ϖʔδ<্࢙࠷ް>͋ΔͷͰ࣌ؒΛ͍ͩ͘͞ʜ
  28. lզʑ͸ɺιϑτ΢ΣΞ։ൃʹ͓͍ͯ৽ͨͳࣾձߏ଄ Λ࡞Γग़͠ɺͦͷͳ͔ で ٕज़తͳߴΈͱ ビジ ωεͷ ビ ジ ϣϯΛ݁ び

    ෇͚ɺಠࣗͷ バ ϦϡʔΛ࣋ͬͨ プ ϩ ダ Ϋ τ΍αʔ ビ εΛੜΈग़͢ػձΛ͍࣋ͬͯΔɻ 
 ͜Ε が զʑͷڧΈ だ ɻ ɹ91ͷ੒ޭ͸ɺ৴པ で ͖Διϑτ΢ΣΞͷ͢ ば ΍͍ ݟੵΓɺ࣮૷ɺ デプ ϩΠ がで ͖Δ༏लͳ プ ϩ グ ϥϚʔ ͷ૿Ճʹ͔͔͍ͬͯΔɻ ڧௐ౳͸Ҿ༻ऀʹΑΔ
  29. 3VCZίϛϡχςΟଘଓͷ՝୊ w 3VCZΤίγεςϜͷൃల w 3VCZίϛϡχςΟͷ৽௠୅ँ w 3VCZίϛϡχςΟ಺Ͱͷ࿅౓ͷ޲্ w  ࠃ಺Ͱͷ

    3VCZϓϨθϯεͷҡ࣋
  30. 3VCZίϛϡχςΟͱ͸

  31. http://www. fl ickr.com/photos/recompile_net/4932459606/ lίϛϡχςΟͱ͸୭͔ɻ΋ͪΖΜɺ ͋ͳͨͷ͜ͱͩɻ͋ͳ͕ͨίϛϡχ ςΟͰ͋Γɺ ͦΕҎ֎ʹίϛϡχ ςΟ͸͍ͳ͍ɻ͋ͳͨͷΑ͏ͳਓʑͷ ू·ΓΛɺίϛϡχςΟͱݺͿͷͩ ߴڮ੐ٛ

    3VCZJTU.BHB[JOF߸ר಄ݴ
  32. ƂŦŢŰ ſűƄŖŜŘŝƄ ŧŔŕŪũƄŝſ / I can organize RubyKaigi a little

    https://speakerdeck.com/kakutani/i-can-organize-rubykaigi-a-little 3VCZίϛϡχςΟ͸࿭੕ʹͻͱͭ ஍ٿ্ʹແ਺ʹଘࡏ͢Δࠃ΍஍Ҭɺൃ࿩͢Δࣗવݴޠɺڵຯɾؔ৺ʹΑΔαϒίϛϡχςΟͦΕͧΕ͕ॏͳΓͱͭͳ͕ΓΛ࣋ ͭ͜ͱͰ3VCZʹ·ͭΘΔଟ૚తͳ࣮ફڞಉମΛ஍ٿ্ʹߏ੒͢Δͷͩɻଟ༷Ͱ͋ͬͯ΋෼அ͸͞Εͯ΄͘͠ͳ͍Αɻ3VCZ࠾ ༻اۀͷ৬৔ʹ΋3VCZͷ࣮ફڞಉମͱͯ͠ͷଆ໘͕͋ΔΑɻ෼அ͞Ε͍ͯͳ͍ͱߟ͑ͯΈͯ͸Ͳ͏ͩΖ͏͔ʁ
  33. 3VCZίϛϡχςΟଘଓͷ՝୊ w 3VCZΤίγεςϜͷൃల w 3VCZίϛϡχςΟͷ৽௠୅ँ w 3VCZίϛϡχςΟ಺Ͱͷ࿅౓ͷ޲্ w  ࠃ಺Ͱͷ

    3VCZϓϨθϯεͷҡ࣋
  34. 3VCZJTU͕޾ͤʹ฻ΒͤΔɺ ΦʔηϯςΟοΫͰ͍ΒΕΔ 
 ΤϯδχΞϦϯά૊৫ΛٻΊͯʜ

  35. None
  36. 3VCZΤίγεςϜͷൃల

  37. 3VCZΤίγεςϜͷൃల w ίʔυΛॻ͘ w ӳޠ BTBMJOHVBGSBODB Ͱडൃ৴͢Δ w ࠃࡍΧϯϑΝϨϯεͰࣗ෼ͷଘࡏΛࣔ͢ ͜͜Ͱ͸ʮ޲৺తํ޲ʹҠಈ͢ΔʯԦಓίʔεΛࣔͨ͢Ίʹɺएׯޠฐͷ͋Δ୯७ԽΛ͍ͯ͠ΔΑɻ΋ͪΖΜίϯτ

    ϦϏϡʔγϣϯͷ͔ͨͪ͸͞·͟·Ͱ͋Γɺ3VCZͷ࣮ફڞಉମʹlࢀՃ͢Δz 3VCZJTUʹͳΔ ಓ͸ͻͱͭͰ͸ͳ͍Α
  38. None
  39. None
  40. None
  41. 3VCZίϛϡχςΟͷ৽௠୅ँ

  42. 2VPSBTIZPVIFJ3VCZ଍Γͳ͍<ݕࡧ>

  43. lਖ਼౷తपลࢀՃ͸ԁख़࣮ͨ͠ફͷ৔ʹ͓͚ΔͦͷҐ ஔʹΑͬͯಈػ͚ͮΒΕͯ޲৺తํ޲ʹҠಈ͢Δɻͦ Ε͸૿େ͍ͯ͘͠ࢀՃͷ࢖༻Ձ஋ʹΑͬͯɺ͞Βʹɺ ৽ࢀऀͷेશత࣮ફऀʹͳΓ͍ͨͱ͍͏ཉٻʹΑͬ ͯɺಈػ͚ͮΒΕΔɻ࣮ફڞಉମʹ͸ྺ࢙ͱൃୡͷα ΠΫϧ͕͋ΓɺͦΕࣗମ͸ɺ৽ࢀऀ͕ݹࢀऀʹస਎͢ Δ͜ͱ͕໨ཱͨͳ͍ܗͰ࣮ફʹͱͬͯඞਢͱͳΔ΍Γ ํͰ࠶ੜ࢈͞ΕΔɻ

  44. None
  45. None
  46. https://speakerdeck.com/igaiga/ginza-rails27-igaiga?slide=9 !JHBJHB͕ۜ࠲3BJMTͰ࿩ͨ͠ͱ͖ͷओʹॳֶऀ޲͚ͷॻ੶Ϛοϓ͕΂ΜΓ

  47. 3VCZίϛϡχςΟ಺Ͱͷ ɹ࿅౓ͷ޲্

  48. lਖ਼౷తपลࢀՃ͸ԁख़࣮ͨ͠ફͷ৔ʹ͓͚ΔͦͷҐ ஔʹΑͬͯಈػ͚ͮΒΕͯ޲৺తํ޲ʹҠಈ͢Δɻͦ Ε͸૿େ͍ͯ͘͠ࢀՃͷ࢖༻Ձ஋ʹΑͬͯɺ͞Βʹɺ ৽ࢀऀͷेશత࣮ફऀʹͳΓ͍ͨͱ͍͏ཉٻʹΑͬ ͯɺಈػ͚ͮΒΕΔɻ࣮ફڞಉମʹ͸ྺ࢙ͱൃୡͷα ΠΫϧ͕͋ΓɺͦΕࣗମ͸ɺ৽ࢀऀ͕ݹࢀऀʹస਎͢ Δ͜ͱ͕໨ཱͨͳ͍ܗͰ࣮ફʹͱͬͯඞਢͱͳΔ΍Γ ํͰ࠶ੜ࢈͞ΕΔɻ

  49. https://www.packtpub.com/product/polished-ruby-programming/9781801072724

  50. “This book is aimed at intermediate Ruby programmers and focuses

    on teaching principles of Ruby programming, as well as trade-offs to consider when making implementation decisions. !"#$%&'()*+,-./0123456)*+,-./078/(9:;%< =>?@ABCD(EF2GHIAJKLM;3NOAPQ6QRCS — Jeremy Evans (RubyKaigi Takeout 2021)
  51. Polished Ruby Programming #ŪŰ w ίϛϡχςΟͷlेશత࣮ફऀzʹΑΔٱͼ͞ͷେܕॻ੶ w ෦ߏ੒ શষ 3VCZରԠ

    w ୈ෦3VCZͷlجૅz ϝιουҾ਺ʹҟ༷ʹ͘Θ͍͠  w ୈ෦࣮ફͷlݪଇͱτϨʔυΦϑz w ୈ෦+FSFNZͷओுP ff UIF3BJMT %# 8FC ηΩϡϦςΟ  w ϖʔδ จষͱίʔυ͔͠ͳ͍ ͔ͨ͘ͳʹਤ͕ແ͍  w l8PSL $PSSFDU 'VOʜBOE'BTUz w αϯϓϧίʔυ͕པ΋͍͠ པ΋͗͢͠Δ͔΋😂
  52. ༁ॻઈ൛ ༁͕ඍົ ະ༁ॻ੶ ݹ͍ େ෦ͳͷ΋ڍ͛ͯ·͢ ৭͕ബ͍΍ͭ 
 8&# %#13&44͸LPͷ࿈ࡌl3VCZͷ΢ϥΨϫz͕ඞಡd 


    ૯ूฤʹશ෦͸ऩ࿥͞Εͯͳ͍ͷͰԿ߸͔ݸผͰങ͏ 
 ʰ3VCZιʔείʔυ׬શղઆʱ 3)( ͸΢ΣϒͰશจಡΊ·͢
  53. lզʑ͸ɺιϑτ΢ΣΞ։ൃʹ͓͍ͯ৽ͨͳࣾձߏ଄ Λ࡞Γग़͠ɺͦͷͳ͔ で ٕज़తͳߴΈͱ ビジ ωεͷ ビ ジ ϣϯΛ݁ び

    ෇͚ɺಠࣗͷ バ ϦϡʔΛ࣋ͬͨ プ ϩ ダ Ϋ τ΍αʔ ビ εΛੜΈग़͢ػձΛ͍࣋ͬͯΔɻ 
 ͜Ε が զʑͷڧΈ だ ɻ ɹ91ͷ੒ޭ͸ɺ৴པ で ͖Διϑτ΢ΣΞͷ͢ ば ΍͍ ݟੵΓɺ࣮૷ɺ デプ ϩΠ がで ͖Δ༏लͳ プ ϩ グ ϥϚʔ ͷ૿Ճʹ͔͔͍ͬͯΔɻ ڧௐ౳͸Ҿ༻ऀʹΑΔ
  54.  ࠃ಺Ͱͷ 
 ɹ3VCZϓϨθϯεͷҡ࣋

  55. 3VCZJTU͕޾ͤʹ฻ΒͤΔɺ ΦʔηϯςΟοΫͰ͍ΒΕΔ 
 ΤϯδχΞϦϯά૊৫ΛٻΊͯʜ

  56. None
  57. https://twitter.com/jeremyevans0/status/1407513414646198279 l "NB[PO ͷ3VCZίϯϐϡʔλॻ৽ץϥϯΩϯάͰҐʹͳͬͨΑ 
 3VCZͷ৽ץ͕࡭Ҏ্͋ͬͨΒ΋ͬͱྑ͔ͬͨΜ͚ͩͲ z

  58. https://twitter.com/junya/status/1437704432372781060

  59. Ͱ΋΍ΔΜͩΑR w ຊ͕ॻళʹ͋Δੜ͖ͯ·͢Ξϐʔϧ w ࠃ಺ͩͱ೔ຊޠ͡Όͳ͍ͱϦʔν͠ͳ͍ w ίϩφՒͰిॻؚΊ ٕज़ॻࢢ৔͸ଟগ࣋ͪ௚͠ ͍ͯΔ Β͍͕͠ಈըੈ୅ͷᎱ಄͕ʜ

    w 3VCZͷຊ͸ͦΜͳʹ਺͕ग़ͳ͍ w ϋΠΤϯυٕज़ॻ͸ͦΜͳʹ਺͕ग़ͳ͍ w ຊॻ͸3VCZYϋΠΤϯυٕज़ॻ😇
  60. 3VCZYϋΠΤϯυٕज़ॻ😇

  61. ࡞ઓ

  62. https://twitter.com/kakutani/status/1382919795939549184

  63. ചΕΔຊΛॻ͚͹ຊ͸ചΕΔ ഭਅ

  64. 3VCZYϋΠΤϯυٕज़ॻ😇

  65. 🥺

  66. ·ͱΊ

  67. ʰݚᮎ3VCZϓϩάϥϛϯάʱ Ծ 
 ࢮܐࣥߦத ຋༁ਐߦத ೥ཅय़ ༧ఆ  ֯୩৴ଠ࿠༁ϥϜμϊʔτࣾץο ೥݄ిॻЌ൛ൢച։࢝ر๬

    ر๬ 
 ϖʔδ͋Δ<্࢙࠷ް>ͷͰ࣌ؒΛ͍ͩ͘͞ʜ
  68. ങͬͯ͘ ΕR

  69. lզʑ͸ɺιϑτ΢ΣΞ։ൃʹ͓͍ͯ৽ͨͳࣾձߏ଄ Λ࡞Γग़͠ɺͦͷͳ͔ で ٕज़తͳߴΈͱ ビジ ωεͷ ビ ジ ϣϯΛ݁ び

    ෇͚ɺಠࣗͷ バ ϦϡʔΛ࣋ͬͨ プ ϩ ダ Ϋ τ΍αʔ ビ εΛੜΈग़͢ػձΛ͍࣋ͬͯΔɻ 
 ͜Ε が զʑͷڧΈ だ ɻ ɹ91ͷ੒ޭ͸ɺ৴པ で ͖Διϑτ΢ΣΞͷ͢ ば ΍͍ ݟੵΓɺ࣮૷ɺ デプ ϩΠ がで ͖Δ༏लͳ プ ϩ グ ϥϚʔ ͷ૿Ճʹ͔͔͍ͬͯΔɻ ڧௐ౳͸Ҿ༻ऀʹΑΔ
  70. 3VCZίϛϡχςΟଘଓͷ՝୊ w 3VCZΤίγεςϜͷൃల w 3VCZίϛϡχςΟͷ৽௠୅ँ w 3VCZίϛϡχςΟ಺Ͱͷ࿅౓ͷ޲্ w  ࠃ಺Ͱͷ

    3VCZϓϨθϯεͷҡ࣋
  71. 3VCZJTU͕޾ͤʹ฻ΒͤΔɺ ΦʔηϯςΟοΫͰ͍ΒΕΔ 
 ΤϯδχΞϦϯά૊৫ΛٻΊͯʜ

  72. ങͬͯ͘ ΕR

  73. ʰݚᮎ3VCZϓϩάϥϛϯάʱ Ծ 
 ࢮܐࣥߦத ຋༁ਐߦத ೥ཅय़ ༧ఆ  ֯୩৴ଠ࿠༁ϥϜμϊʔτࣾץο ೥݄ిॻЌ൛ൢച։࢝ر๬

    ر๬ 
 ϖʔδ͋Δ<্࢙࠷ް>ͷͰ࣌ؒΛ͍ͩ͘͞ʜ