Tokyo Ruby Kaigi

My talk from Tokyo Ruby Kaigi

Transcript

2. ͜Μʹͪ͸ʂ
3. ೔ຊޠೖྗࢼݧ
4. Aaron Patterson @tenderlove
5. GitHub
6. ko1: ϓϩάϥϛϯάΛ͍ͯͯ͠ʮ͓͓ɺ ੌ͍ίʔυ͕ॻ͚ͨʯʮ͜Ε͸ੌ͍΋ͷ Λ࡞ͬͯ͠·ͬͨʯͷΑ͏ͳܦݧͳͲ
7. Me: ʮੌ͍ίʔυʯ ͍͍ͬͯͬͨԿͩΖ͏
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)
31. image belongs_to(:card) card has_many(:images)
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
53. ιϑτ΢ΣΞ
54. OpenCV https://github.com/ruby-opencv/ruby-opencv
55. ࡱͬͨࣸਅ
57. ཉ͍͠Πϝʔδ
59. Χʔυͷൈ͖ํ
60. ؆୯ͳ8ஈ֊͚ͩ!* * ؆୯͡Όͳ͍ɺଟ෼
62. લॲཧ
63. άϨʔεέʔϧ gray = OpenCV.BGR2GRAY img
65. Τοδݕग़ canny_img = gray.canny @thresh, @thresh http://en.wikipedia.org/wiki/Canny_edge_detector
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. ྠֲ ݀
70. Ұ൪େ͖ͳྠֲ max = contours.max_by { |c| c.contour_area }
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
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
77. ڥք࠲ඪΛઃఆ͢Δ new_img.set_roi OpenCV::CvRect.new(0, 0, width, height)
79. It’s Just That Easy!
80. ϢʔβʔΠϯλʔϑΣΠε ΧϝϥͰ ࡱͬͨ Πϝʔδ ਪଌ #1 ਪଌ #2 ਪଌ #3
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
89. ࣦഊͷ࣌
91. ֆ͸ࣅͯΔ
93. अຐೣ
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
126. Πϯελϯεม਺
128. ActiveRecord΋࢖͑·͢
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
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!
150. Ͳ͏΍ͬͯ ಈ͍ͯΔʁ
151. VM ͸هԱ͢Δ
152. ͦΕ͸ۭന͡Όͳ ͯ͘ɺهԱͩɻ
153. ଞͷಛ௃
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