The Road to Ruby Mastery (RailsClub Moscow 2017)

Transcript

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2. Божидар

3. I’m back

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21. Большое спасибо!

22. Большое спасибо!

23. Sofia, Bulgaria

24. Sofia, Bulgaria

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26. I’m an Emacs fanatic

27. bbatsov

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30. They call me Master…

31. … and I’m a Rubyist

32. I must be The Master Rubyist!

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34. This guy is so deep and profound!

35. The Road to Ruby Mastery by Bozhidar Batsov

36. Master

37. having or showing very great skill or proficiency

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39. Novice

40. a person new to and inexperienced in a job or

    situation
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42. Journeyman

43. a worker, performer, or athlete who is experienced and good

    but not excellent
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45. Dreyfus Model of Skill Acquisition

46. Novice Advanced Beginner Competent Proficient Expert

47. The Road to Mastery

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49. not really

50. try 10 years

51. http://norvig.com/21- days.html Teach Yourself Programming in Ten Years Peter Norvig

52. Apprenticeship

53. Novice Journeyman Master Apprenticeship Apprenticeship

54. learning from others

55. directly

56. indirectly

57. Computer Science Fundamentals

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69. Object-oriented programming

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71. Ruby is a purely object- oriented language

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74. Know Thy Language!

75. Crazy People

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77. Ruby is a VERY COMPLEX language!

78. class instance variable

79. protected

80. module_function vs extend self

81. refinements

82. super vs super()

83. == === equal? eql?

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86. Grokking the language

87. Understanding and appreciating its philosophy

88. Coming to grips with reality

89. (no language is perfect)

90. (not even Clojure)

91. (some languages really suck)

92. Master the idioms

93. for i in 1..3 puts "Hello, Moscow!” end

94. 3.times do puts "Hello, Moscow!” end

95. if some_condition then # body omitted end

96. def some_method # ... return result end

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100. Read some (good) code

101. some == A LOT

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103. Obtain a notion of style

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106. Ruby Style Guide

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108. Tackle problems with style

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110. puts debugging sucks

111. bla bla bla puts ‘********’ puts x puts ‘********’

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113. pro “puts” debugging techniques

114. object = Object.new puts object.method(:blank?).source_location # => ["/gems/activesupport-5.0.0.beta1/ lib/active_support/core_ext/object/ blank.rb",

     14]

115. class Bar def foo puts "=====================" puts caller end end

116. def foo puts method(:foo).super_method.source_location super end

117. 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]]

118. 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'

119. Ruby Debugging Magic Cheat Sheet http://www.schneems.com/2016/01/25/ruby-debugging-magic-cheat- sheet.html

120. I am a puts debugger https://tenderlovemaking.com/2016/02/05/i-am-a-puts-debuggerer.html

121. I am not a puts debugger!

122. byebug https://github.com/deivid-rodriguez/byebug

123. pry-byebug https://github.com/deivid-rodriguez/pry-byebug

124. Profiling stuff

125. ruby-prof https://github.com/ruby-prof/ruby-prof

126. memory_profiler https://github.com/SamSaffron/memory_profiler

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128. Beyond Rails

129. Opal

130. RubyMotion

131. System administration

132. JRuby

133. Alternative web frameworks

134. Hanami

135. Padrino

136. Sinatra

137. Roda

138. Keep in sync

139. RubyWeekly

140. Ruby5

141. RubyRogues

142. RubyTapas

143. GoRails

144. RailsClub

145. RubyConf

146. RailsConf

147. Always be exploring!

148. Clojure

149. Haskell

150. Elm

151. Erlang/Elixir

152. Racket

153. Ideas from other programming languages make us better programmers

154. One more thing…

155. Ruby is simply not a good fit for every possible

     problem
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158. ФЕЛИНА

159. Епилог twitter: @bbatsov github: @bbatsov http//batsov.com http://emacsredux.com RailsClub Moscow, Russia

     23.09.2017