Tokyo Ruby Kaigi

Transcript

1. None

2. ͜Μʹͪ͸ʂ

3. ೔ຊޠೖྗࢼݧ

4. Aaron Patterson @tenderlove

5. GitHub

6. ko1: ϓϩάϥϛϯάΛ͍ͯͯ͠ʮ͓͓ɺ ੌ͍ίʔυ͕ॻ͚ͨʯʮ͜Ε͸ੌ͍΋ͷ Λ࡞ͬͯ͠·ͬͨʯͷΑ͏ͳܦݧͳͲ

7. Me: ʮੌ͍ίʔυʯ ͍͍ͬͯͬͨԿͩΖ͏

8. None

9. ;ͨͭͷҙຯ ڪΖ͍͠ / ා͍ ૉ੖Β͍͠ / ྑ͍

10. ೋͭͷτϐοΫ ڪΖ͍͠ / ා͍: PHP ૉ੖Β͍͠ / ྑ͍: Computer Vision

    ൿີ

11. ੌ͍ίʔυ ૉ੖Β͍͠ / ྑ͍

12. ίϯϐϡʔλ Ϗδϣϯ

13. ΨϥΫλ͕ ͍ͬͺ͍

14. Magic The Gathering (MtG)ͱ͸

15. Collectible Card Game

16. ࢲͷ໰୊ (Χʔυͷத਎) • Too many cards • Don’t know what

    they do • Are they worth any money? • Plus many more!

17. ίϯϐϡʔλʔʹ߹͏ ໰୊Έ͍ͨ Seems like a job for computers!

18. ࢲͷղܾ

19. ਓ޻஌ೳ Χϝϥ ೣ! Ruby!

20. High Level Process

21. ࣸਅΛࡱΔ ΧʔυΛൈ͚Δ ΧʔυΛ֬ೝ͢Δ σʔλΛอଘ͢Δ

22. Χʔυͷೝࣝ

23. श ͬͨ ਪଌ ϓϩϯϓτ ڭ͑Δ ίʔύε

24. श ͬͨ ਪଌ ϓϩϯϓτ ڭ͑Δ ίʔύ ε

25. ਓ޻஌ೳ

26. σʔλɹϞσϧ

27. Χʔυͷ৘ใ

28. ࣸਅ ໊લ ਓؾ౓ ηοτ

29. image belongs_to(:card) card has_one(:image)

30. None

31. image belongs_to(:card) card has_many(:images)

32. None

33. image habtm(:cards) card habmt(:image)

34. ׬શσʔλϞσϧ Cards Images Hashes habtm has_many

35. ίʔύεͷੜ੒

36. Executor Pool class ThreadExecutor def initialize size @queue = Queue.new

    @size = size @pool = size.times.map { |i| Thread.new { while job = @queue.pop; job.run end } } end def execute job = Proc.new promise = Promise.new job @queue << promise promise end def shutdown @size.times { @queue << nil } @pool.each(&:join) end end

37. Queue up work promise = @executor.execute do @http_pool.with_connection do |conn|

    uri = URI 'http://gatherer.wizards.com/Pages/Default.aspx' response = conn.request uri # save the response end end # some time later promise.value

38. Me Wizards

39. 1.6GB

40. http://mtgjson.com/

41. ॻ͘લʹ άʔάϧͨ͠ํ͕͍͍

42. Χʔυͷೝࣝ

43. ஌֮తϋογϡ libphash (gem install phasion)

44. 11998341215223291070 12079686925145871551 Reference Scanned

45. ϋϛϯάڑ཭ require 'phashion' left = Phashion.image_hash_for "a.jpg" right = Phashion.image_hash_for

    "b.jpg" p Phashion.hamming_distance left, right # => 8

46. 5622372658725034411 12079686925145871551 Reference Scanned

47. ϋϛϯάڑ཭ require 'phashion' left = Phashion.image_hash_for "c.jpg" right = Phashion.image_hash_for

    "b.jpg" p Phashion.hamming_distance left, right # => 28

48. ϋογϡΛ௥Ճ͢Δͱ ஌͕ࣝ૿͑Δ

49. ϋʔυ΢ΣΞ

50. None
51. None
52. None

53. ιϑτ΢ΣΞ

54. OpenCV https://github.com/ruby-opencv/ruby-opencv

55. ࡱͬͨࣸਅ

56. None

57. ཉ͍͠Πϝʔδ

58. None

59. Χʔυͷൈ͖ํ

60. ؆୯ͳ8ஈ֊͚ͩ!* * ؆୯͡Όͳ͍ɺଟ෼

61. None

62. લॲཧ

63. άϨʔεέʔϧ gray = OpenCV.BGR2GRAY img

64. None

65. Τοδݕग़ canny_img = gray.canny @thresh, @thresh http://en.wikipedia.org/wiki/Canny_edge_detector

66. None

67. ྠֲΛݟ͚ͭΔ contours = [] contour_node = processed.find_contours( :mode => OpenCV::CV_RETR_TREE,

    :method => OpenCV::CV_CHAIN_APPROX_SIMPLE) while contour_node unless contour_node.hole? contours << contour_node end contour_node = contour_node.h_next end

68. ྠֲ ݀

69. None

70. Ұ൪େ͖ͳྠֲ max = contours.max_by { |c| c.contour_area }

71. None

72. ଟ֯ܗΛݟ͚ͭΔ approx = max.approx_poly(:method => :dp, :recursive => true, :accuracy

    => 0.02 * peri) x = approx.convex_hull2.to_a clockwise_points = clockwise x.reverse
73. None

74. ಁࢹม׵ͷߦྻ to = [ OpenCV::CvPoint2D32f.new(0, 0), OpenCV::CvPoint2D32f.new(width, 0), OpenCV::CvPoint2D32f.new(width, height),

    OpenCV::CvPoint2D32f.new(0, height), ] from = polygon_points transform = OpenCV::CvMat.get_perspective_transform(from, to)

75. ΠϝʔδΛม׵͢Δ new_img = img.warp_perspective transform

76. None

77. ڥք࠲ඪΛઃఆ͢Δ new_img.set_roi OpenCV::CvRect.new(0, 0, width, height)

78. None

79. It’s Just That Easy!

80. ϢʔβʔΠϯλʔϑΣΠε ΧϝϥͰ ࡱͬͨ Πϝʔδ ਪଌ #1 ਪଌ #2 ਪଌ #3

81. None

82. Կ͕͋Δʁ Card.joins(:images) .where('images.type' => 'UserImage') .group('cards.name') .count

83. Ͳͷ͙Β͍ྑ͍ʁ Card.joins(:images) # best .where('images.type' => 'UserImage') .order('rating desc').first Card.joins(:images)

    # worst .where('images.type' => 'UserImage') .order('rating asc').first

84. ࠷ߴ:

85. ࠷௿:

86. ϓϩδΣΫτͷ໰୊

87. য఺ͷ࣌ؒ

88. None

89. ࣦഊͷ࣌

90. None

91. ֆ͸ࣅͯΔ

92. None

93. अຐೣ

94. None

95. ར఺ ઃఆ͸؆୯ ඞཁϋʔυ΢ΣΞ͸͋·Γͳ͍ ͍҆ ΩϟϦϒϨʔτ͠ͳ͍

96. ܽ఺ ෳࡶͳιϑτ΢ΣΞ ࿑ಇ ֬ೝͷ஗͞

97. ࠓޙͷ׆ಈ

98. ࣗಈԽ

99. ੌ͍ίʔυ ڪΖ͍͠ / ා͍

100. PHP + Ruby

101. Phuby (ϑʔϏΟ) https://github.com/tenderlove/phuby એ఻

102. Examples

103. PHPͷ ΦϒδΣΫτΛ࢖͏

104. ਺ࣈ require 'phuby' Phuby::Runtime.php do |runtime| runtime.eval "$v = strlen('PHP

     INSIDE OF RUBY');" puts runtime['v'] # => 18 end

105. จࣈྻ require 'phuby' Phuby::Runtime.php do |runtime| runtime.eval "$name = 'Aaron';"

     puts runtime['name'] # => Aaron end

106. ഑ྻ require 'phuby' Phuby::Runtime.php do |runtime| runtime.eval "$cars = array('Toyota',

     'Honda', 'BMW');" p runtime['cars'][0] # => Toyota p runtime['cars'][1] # => Honda p runtime['cars'][2] # => BMW end

107. ࿈૝഑ྻ require 'phuby' Phuby::Runtime.php do |runtime| runtime.eval "$e = array('foo'

     => 'bar', 'bar' => 'baz');" p runtime['e']['foo'] # => 'bar' p runtime['e']['bar'] # => 'baz' end

108. Rubyͷ ΦϒδΣΫτΛ࢖͏

109. Objects require 'phuby' class RubyKaigi def where puts "౦ژ" end

     end Phuby::Runtime.php do |runtime| runtime['kaigi'] = RubyKaigi.new runtime.eval("$kaigi->where();") # => ౦ژ end

110. ͳͥʁ

111. ͍͍͔Β

112. scientists were so preoccupied with whether or not they could

     that they didn't stop to think if they should.

113. ϓϩάϥϜͷମܕ

114. Runtime Proxy Object Map Ruby Object Proxy PHP Object Proxy

115. Wrapper Access PHP Objects Ruby C PHP Object Map Ruby

     Proxy PHP Runtime Object

116. Wrapper Access Ruby Objects Ruby C PHP Object Map Ruby

     Proxy PHP Runtime Object

117. ϓϩδΣΫτͷ ໰୊

118. PHPΛ ίϯύΠϧ͢Δ

119. GC

120. άϩʔόϧͷม਺

121. ໰୊ require 'phuby' require 'openssl' p OpenSSL::Cipher.ciphers # => ["AES-128-CBC",

     "AES-128-CBC-HMAC-SHA1", ... ] Phuby::Runtime.php do |runtime| runtime.eval("$hi = 'Hello World';") end p OpenSSL::Cipher.ciphers # => []

122. Solution: fork require 'phuby' require 'openssl' p OpenSSL::Cipher.ciphers # =>

     ["AES-128-CBC", "AES-128-CBC-HMAC-SHA1", ... ] Process.waitpid fork { Phuby::Runtime.php do |runtime| runtime.eval("$hi = 'Hello World';") end } p OpenSSL::Cipher.ciphers # => ["AES-128-CBC", "AES-128-CBC-HMAC-SHA1", ... ]

123. Rails Support

124. PHP templates

125. None

126. Πϯελϯεม਺

127. None

128. ActiveRecord΋࢖͑·͢

129. None

130. How much would you pay for this?

131. 200ԁ?

132. 250ԁ?

133. https://github.com/ tenderlove/phuby FREE!

134. ൿີͷτϐοΫ

135. ko1 said this is a tech conference, so you don’t

     have to tell any jokes

136. So I won’t tell any jokes.

137. ੌ͍ίʔυ How does it work?

138. Homeopathic Optimizations

139. Homeopathy ͱ͸ʁ

140. رऍɻ

141. ௕͗͢Δʂ

142. None
143. None

144. Modern advocates of homeopathy have proposed a concept of "water

     memory", according to which water "remembers" the substances mixed in

145. ਫ͸ هԱग़དྷ·͢

146. ۭന΋ هԱ͢Δࣄ͕Ͱ͖Δʁ

147. YES!

148. σϞͷ࣌ؒ!

149. None

150. Ͳ͏΍ͬͯ ಈ͍ͯΔʁ

151. VM ͸هԱ͢Δ

152. ͦΕ͸ۭന͡Όͳ ͯ͘ɺهԱͩɻ

153. ଞͷಛ௃

154. None

155. ར఺

156. ߴ଎Խ

157. "No code is faster than no code"

158. رऍ͞ΕΕ͹͞ΕΔ΄Ͳ ϓϩάϥϜ͸ΑΓ଎͘ͳ Δ

159. ҡ࣋

160. ίʔυ͸ͳ͍͔Β

161. THANK YOU!!!

162. ࣭໰ʁ