The Master Rubyist

Slide deck from my RubyC 2016 presentation.

Transcript

2. Божидар
3. @bbatsov
4. I’m back
5. epic fail
7. Hakuna Matata, what a wonderful phrase Hakuna Matata, ain't no passing craze It means no worries for the rest of your days It's our problem free philosophy, Hakuna Matata
8. They call me Master…
9. … and I’m a Rubyist
10. I must be The Master Rubyist!
12. Sofia, Bulgaria
13. Sofia, Bulgaria
15. Tarnovo, Bulgaria
19. Dashingly handsome
20. Sings like an angel
21. Loves karaoke
22. Is very responsible
23. Was very responsible last night
24. Loves beer
25. Loves scotch
26. Loves vodka
27. Terrified by gorilka
28. Loves Ruby
29. Loves Ruby
30. Loves Ruby
31. Loves Ruby
32. Uses tabs instead of spaces
33. Uses vim
35. Emacs fanatic
36. Star Wars fanatic
37. Batman
39. Loves OSS
40. Does some OSS development
42. On the core team of some projects
43. Works for a famous company
45. Loved by his team
47. Loved by his team
48. The Master Rubyist D[$Q\JKFCT$CVUQX
49. Master
50. having or showing very great skill or proficiency
52. Novice
53. a person new to and inexperienced in a job or situation
55. Journeyman
56. a worker, performer, or athlete who is experienced and good but not excellent
58. The Road to Mastery
60. not really
61. try 10 years
62. http://norvig.com/21- days.html Teach Yourself Programming in Ten Years Peter Norvig
63. Apprenticeship
64. Novice Journeyman Master Apprenticeship Apprenticeship
65. Object-oriented programming
67. Ruby is a purely object- oriented language
70. Know Thy Language!
71. Crazy People
73. Ruby is a VERY COMPLEX language!
74. class instance variable
75. protected
76. module_function vs extend self
77. refinements
78. super vs super()
79. == === equal? eql?
82. Grokking the language
83. Understanding and appreciating its philosophy
84. Coming to grips with reality
85. (no language is perfect)
86. (not even Clojure)
87. (some languages really suck)
88. Master the idioms
89. for i in 1..3 puts "Hello, Kiev!" end
90. 3.times do puts "Hello, Kiev!" end
91. if some_condition then # body omitted end
92. def some_method # ... return result end
96. Read some (good) code
97. some == A LOT
99. Obtain a notion of style
100. A style guide • a curated set of (supposedly) good practices • spares you the process of making trivial decisions • allows you to focus on the actual problems • simple and concise
102. Use the active voice.
103. My first visit to Kiev will always be remembered by me. lame
104. I shall always remember my first visit to Kiev. legit
105. The word personally is often unnecessary.
106. Personally, I love RubyC.
107. Style guides aren’t a replacement for thinking
109. Write clearly -- don't be too clever.
110. def user_signed_in? !!@current_user end def user_signed_in? !@current_user.nil? end
111. Don't sacrifice clarity for small gains in efficiency.
112. i = 1 res = 0 while i <= 10 res += i i += 1 end
113. (1..10).reduce(:+)
114. (N * (N + 1)) / 2
115. (10 * (10 + 1)) / 2
116. Ruby Style Guide https://github.com/bbatsov/ruby-style-guide
118. Tackle problems with style
120. puts debugging sucks
121. bla bla bla puts ‘********’ puts x puts ‘********’
123. pro “puts” debugging techniques
124. object = Object.new puts object.method(:blank?).source_location # => ["/gems/ activesupport-5.0.0.beta1/lib/ active_support/core_ext/object/ blank.rb", 14]
125. class Bar def foo puts "=====================" puts caller end end
126. def foo puts method(:foo).super_method.source_location super end
127. def parse(input, skip_code_comments: false, ignore_whitespace: true) # do stuff end method(:parse).parameters #=> [[:req, :input], [:key, :skip_code_comments], [:key, :ignore_whitespace]]
128. config.thing = { "foo" => "bar" } config.thing.freeze = { "foo" => "bar" } config.thing.delete("foo") # active_support/concurrency/share_lock.rb:151:in `delete': can't modify frozen Hash (RuntimeError) # from active_support/concurrency/share_lock.rb:151:in `yield_shares' # from active_support/concurrency/share_lock.rb:79:in `block in stop_exclusive'
129. Ruby Debugging Magic Cheat Sheet http://www.schneems.com/2016/01/25/ruby-debugging- magic-cheat-sheet.html
130. I am a puts debugger https://tenderlovemaking.com/2016/02/05/i-am-a-puts- debuggerer.html
131. I am not a puts debugger!
132. byebug https://github.com/deivid-rodriguez/byebug
133. pry-byebug https://github.com/deivid-rodriguez/pry-byebug
134. Profiling stuff
135. ruby-prof https://github.com/ruby-prof/ruby-prof
136. memory_profiler https://github.com/SamSaffron/memory_profiler
137. The Editors
138. Emacs
139. vim
140. Spacemacs
141. What about the rest?
143. Emacs & vim are forever!
146. Interactive programming
147. The REPL is king!
148. pry > irb
149. Rails
151. Beyond Rails
152. Opal
153. RubyMotion
154. System administration
155. JRuby
156. Alternative web frameworks
157. Volt
158. Hanami
159. Padrino
160. Sinatra
161. Roda
162. Keep in sync
163. RubyWeekly
164. Ruby5
165. RubyRogues
166. RubyTapas
167. GoRails
168. RubyConf
169. RailsConf
170. Always be exploring!
171. Clojure
172. Haskell
173. Elm
174. Erlang/Elixir
175. Racket
176. Ideas from other programming languages make us better programmers
177. One more thing…
178. Ruby is simply not a good fit for every possible problem
181. Felina