Ruby 3.0 Redux (Pivorak 4.0)

Transcript

2. Привiт!
3. Божидар
4. Божо cool
5. Bozhidar
6. Bozhidar
7. Божи дар
8. Божий дар
10. Sofia, Bulgaria Sofia, Bulgaria
12. bbatsov
13. Ruby & Rails style guides
14. •rubystyle.guide •rails.rubystyle.guide •rspec.rubystyle.guide •minitest.rubystyle.guide •blog.rubystyle.guide
18. rubocop-minitest
19. rubocop-rake
21. emacsredux.com
22. metaredux.com
23. #7 on the list of top white hackers in Bulgaria!
25. Божидар Батсов
26. стацковарфлоу
27. Expert in cyber security
28. Expert in the following programming languages: Unix, Emacs, Perl and Ruby
29. The Don Juan of IT in Bulgaria
31. slide intentionally left blank
34. Bulgarian Cheese
35. Болгарка
36. Слънчев Бряг
37. Златни пясъци
38. Банско
39. Луканка
40. Rakia Connecting People
41. Shopska Salad (use only with Rakia)
44. Bulgarian politics are shit wrapped in cellophane.
45. I’m never happy about a small pig and a new boss.
46. To mess with my deputy is like sitting butt naked on a hedgehog.
55. The most beautiful city in Ukraine
57. То є Львів, мій колєґа, про нього різне кажуть: Приезжим из востока Криївку тут покажуть. То є Львів, моє місто, не з простого тіста, Ліплений роками – друзями й ворогами. То є Львів старенький, мудрий, сивий дядько, Кожному залишить кавалочок на згадку. То є Львів "Бонжорно!", Неаполь і Ліворно, По-галицьки говорять, наші в них погоду роблять.
58. То є Львів, шановні, вбирайте шлюбні сподні, Краватку, маринарку і "вйо!" по Стрийськім парку. То є Львів чудовий, вуйко ґонуровий, Я тішуся, шо з вами ходжу цими вулицями. То є Львів старенький, мудрий, сивий дядько, Кожному залишить кавалочок на згадку. То є Львів "Бонжорно!", Неаполь і Ліворно, По-галицьки говорять, наші в них погоду роблять. То є Львів, то Львів...
62. Not on Ruby’s Core Team
63. Matz on Ruby
64. Language Maturity
65. The Ruby Community
66. Ruby is not dying
69. We have to feed the community intellectually. — Matz
70. We have to keep moving forward. — Matz
71. Backwards Compatibility
72. We’re not going to repeat the Python 3 mistakes! — Matz
73. Victim of the Hype Cycle
75. Rails Mania (2008)
76. Ruby Today
77. Ruby Today
78. 2025
79. Matz’s Retirement
81. Ruby 4
82. Ruby 4x4
83. Ruby 4 is going to be 4 times faster than Ruby 3
84. Ruby 4 is going to be 12 times faster than Ruby 2
85. Ruby 4 is finally going to be fast enough!
87. What about Ruby 3?
88. –Matz “We’ll aim to release Ruby 3 for the Olympic Games in Tokyo in 2020.”
89. Ruby 3 Goals •Improved programming safety •Faster performance •Better concurrency/parallelism support •Better tools
90. Optional static typing?
91. Duck inference?
92. Actors?
93. Stream based model?
94. Ownership based model?
95. Guilds?
96. 3 times faster performance?
97. Smaller Goals •Sane keyword arguments (?!!?!) •Pattern Matching •Deprecation of quirky features •Frozen string literals
99. Ruby 3.0 Redux
100. Dictionary Definitions
101. Ruby
102. noun 1. a precious stone consisting of corundum in colour varieties varying from deep crimson or purple to pale rose. 2. a programming language optimised for programmer happiness
103. 3
104. number 1. equivalent to the sum of one and two; one more than two; 3 2. A mystical version rarely achieved by most software projects.
105. Redux
106. adjective 1. brought back, revived Emacs era redux 2. (usually postpositive) (esp of an artistic work) presented in a new way Apocalypse Now Redux
108. Ruby 3.0 is not a single magic release
109. Ruby 3.0 is an idea
111. Ruby follows SemVer
112. Ruby 3 is going to be 3 times faster than Ruby 2.0
113. Generational GC (Ruby 2.1)
114. Incremental GC (Ruby 2.2)
115. MJIT (Ruby 2.6)
116. New AST library (Ruby 2.6)
117. Deprecation of flip-flops (Ruby 2.6)
118. Ruby 2.7
119. Numbered block parameters
120. numbers.map { Math.log2(@1) }
121. foo.bar { @1 + @2 }
122. h = Hash.new { @1[@2] = "Go Fish: #{@2}" }
123. h = Hash.new { @1[@2] = "Go Fish: #{@2}" }
125. https://bugs.ruby-lang.org/issues/15723
126. numbers.map { Math.log2(_1) }
128. Method reference operator
129. [2, 4, 8, 16, 32].map { |n| Math.log2(n) }
130. [2, 4, 8, 16, 32].map(&method(Math.log2))
131. [2, 4, 8, 16, 32].map(&Math.:log2)
132. [2, 4, 8, 16, 32].map { Math.log2(_1) }
133. Beginless range
134. Beginless range
135. Beginningless range
136. arr[..3]
137. items.where(price: ..20)
139. Pattern Matching (https://bugs.ruby-lang.org/issues/14912)
140. person = JSON.parse('{...}', symbolize_names: true) if person[:name] == ‘Alice’ children = person[:children] if children.length == 1 && children[0][:name] == ‘Bob’ p children[0][:age] end end
141. case JSON.parse('{...}', symbolize_names: true) in {name: "Alice", children: [{name: "Bob", age: age}]} p age ... end
143. Resources • https://speakerdeck.com/k_tsj/pattern-matching-new- feature-in-ruby-2-dot-7 • https://medium.com/@baweaver/ruby-2-7-pattern-matching- first-impressions-cdb93c6246e6 • https://medium.com/@baweaver/ruby-2-7-pattern-matching- destructuring-on-point-90f56aaf7b4e
144. All those features are experimental and subject to change
145. Deprecating $; and $,
146. > $; = " " warning: non-nil $; will be deprecate => " " > "hello world!".split warning: $; is set to non-nil value => ["hello", "world!"] > $, = " " warning: non-nil $, will be deprecated => " " > ["hello", "world!"].join warning: non-nil $, will be deprecated => "hello world!"
147. Compaction GC
148. MJIT Tuning/optimizations
149. flip-flops were finally deprecated!
150. Then they were reinstated…
152. Pipeline operator
153. foo() .bar(1, 2) .display
154. foo() |> bar 1, 2 |> display
156. Added, contested and removed
158. Ruby 2.7 is coming for Christmas!
159. Ruby 3.0 (Current Status)
160. Better Tools
161. RubyGems 3
162. The bundling of Bundler (Ruby 2.6)
163. Gemifying the Standard Library (ongoing progress)
164. Default vs Bundled Gems
165. Default Gems • Bundler • RubyGems • date • irb • json • …
166. Bundled Gems • minitest • did_you_mean • rake • …
167. stdgems.org
168. irb • New reline backend (portable replacement for readline) • Completion • Multi-line editing • Syntax-highlighting • Integration with RDoc
170. RDoc • Redesigned documentation system • Twice as fast
171. Ruby 3x3
172. Only applies to certain benchmarks
173. Ruby 2.6 is 65% faster than Ruby 2.0
175. 10% average speedup per release
177. MJIT is the biggest hope for Ruby 3x3
178. Guilds
181. Developed outside the Ruby’s main repo
182. https://github.com/ko1/ruby/tree/guild
183. Work in progress ™
184. Parallel Programming in Ruby 3 with Guilds (http://www.atdot.net/~ko1/activities/2018_rubyconf2018.pdf)
185. Static Typing
186. https://bugs.ruby-lang.org/issues/9999
188. Native Support for Тype Signatures in Ruby 3.0
190. With a twist…
191. Dedicated Ruby interface files (.rbi)
192. Dedicated Ruby signature files (.rbs)
193. class Person @name: String @contacts: Array<Email | Phone> def initialize: (name: String) -> any def name: -> String def contacts: -> Array<Email | Phone> def guess_country: -> (String | nil) end
194. https://github.com/soutaro/steep
195. Type Signatures for Ruby Core (https://github.com/ruby/ruby-signature)
196. Rakia Connecting People
197. Open Questions • Is Steep becoming part of the Standard Library? • How is Sorbet going to make use of its type annotations? • Typing applications
198. Built-in Type Inference Checker
199. def foo(x) if x > 10 x.to_s else x.boo() x + 42 end end foo(42)
200. $ exe/type-profiler test.rb test.rb:6: [error] undefined method: Integer#boo test.rb:7: [error] failed to resolve overload: Integer#+ Object#foo :: (Integer) -> String
201. Resources • https://www.slideshare.net/mametter/a-typelevel-ruby- interpreter-for-testing-and-understanding • https://github.com/mame/ruby-type-profiler
202. Sane Keyword Arguments
203. https://bugs.ruby-lang.org/issues/14183
204. # The following calls pass keyword arguments foo(..., key: val) foo(..., **hsh) foo(..., key: val, **hsh)
205. # The following calls pass **normal** arguments foo(..., {key: val}) foo(..., hsh) foo(..., {key: val, **hsh})
206. Breaking change!!!
207. Migration warning in Ruby 2.7
208. def a_method(k: 1) puts "k: #{k}" end a_method({k: 1}) (irb):4: warning: The last argument is used as the keyword parameter (irb):1: warning: for `a_method' defined here => k: 1
209. # To avoid the warning # and make it Ruby 3 compatible, # use the double splat operator a_method(**{k: 1}) => k: 1
210. What’s not in Ruby 3.0?
211. Actors
212. Stream processing
213. Frozen string literals
214. Deprecation of autoload
215. https://github.com/fxn/zeitwerk
216. Deprecation of backticks (`some-command`)
217. Deprecation of character literals (?x)
218. Summary
219. • Ruby 2.7 will be the final release in the 2.x series • Ruby 3.0 is scheduled to land in 2020 • Ruby 2.7 will serve as a preview for many of the key features in Ruby 3.0 • Static typing and Guilds are the biggest changes coming to Ruby 3.0 • Keyword argument overhaul is going to be a breaking change • The migration path from Ruby 2.x to 3.x should be very smooth
220. Community Impact
221. Community Contributed Features • UTF-8 • Enumerator • Generational GC • Keyword Arguments • JIT • Concurrency
222. Community Contributions • Rake • Bundler • Documentation & Tutorials • A ton of amazing libraries • Rails • …
224. Real Namespaces (https://bugs.ruby-lang.org/issues/14982)
226. Felina
227. Дякую! twitter: @bbatsov github: @bbatsov https://metaredux.com https://emacsredux.com Pivorak 4.0 Lviv, Ukraine 18.10.2019