Ruby 2.0 (en)

Transcript

1. Powered by Rabbit 1.0.4 Ruby 2.0 Chief Architect, Ruby @

   Heroku @yukihiro_matz Yukihiro "Matz" Matsumoto

2. Powered by Rabbit 1.0.4 　 Ruby1.8 will die soon 1/143

3. Powered by Rabbit 1.0.4 　 Move to Ruby2.0 now 2/143

4. Powered by Rabbit 1.0.4 　 1.8.7 3/143

5. Powered by Rabbit 1.0.4 　 Rails tragedy 4/143

6. Powered by Rabbit 1.0.4 　 1.9.0 5/143

7. Powered by Rabbit 1.0.4 　 Compatibility tragedy 6/143

8. Powered by Rabbit 1.0.4 　 Ruby2.0 7/143

9. Powered by Rabbit 1.0.4 　 The happiest release ever 8/143

10. Powered by Rabbit 1.0.4 　 Faster 9/143

11. Powered by Rabbit 1.0.4 　 Better 10/143

12. Powered by Rabbit 1.0.4 　 `100% Compatible' 11/143

13. Powered by Rabbit 1.0.4 　 February 24 1993 12/143

14. Powered by Rabbit 1.0.4 　 I started developing Ruby 13/143

15. Powered by Rabbit 1.0.4 　 The date I named it

    14/143

16. Powered by Rabbit 1.0.4 　 December 21 1995 15/143

17. Powered by Rabbit 1.0.4 　 I released it to public

    (0.95) 16/143

18. Powered by Rabbit 1.0.4 　 Dec 1996 １．０ Aug 1997

    １．１ Dec 1998 １．２ Aug 1999 １．４ Sep 2000 １．６ 17/143

19. Powered by Rabbit 1.0.4 　 Aug 2003 １．８ Dec 2007

    １．９．０ Aug 2010 １．９．２ Oct 2011 １．９．３ 18/143

20. Powered by Rabbit 1.0.4 　 by courtesy of @a_matsuda 19/143

21. Powered by Rabbit 1.0.4 　 by courtesy of @a_matsuda 20/143

22. Powered by Rabbit 1.0.4 　 We released Ruby2.0 21/143

23. Powered by Rabbit 1.0.4 　 Finally 22/143

24. Powered by Rabbit 1.0.4 　 On Faburary 24th 2013 23/143

25. Powered by Rabbit 1.0.4 　 Ruby's 20th birthday 24/143

26. Powered by Rabbit 1.0.4 　 RubyConf2001 25/143

27. Powered by Rabbit 1.0.4 RubyConf2001 I mentioned Ruby2 26/143

28. Powered by Rabbit 1.0.4 RubyConf2001 new VM new GC native

    thread embeddable API 27/143

29. Powered by Rabbit 1.0.4 RubyConf2001 I also mentioned psychological barrier

    28/143

30. Powered by Rabbit 1.0.4 Version Numbers limited resource 29/143

31. Powered by Rabbit 1.0.4 Psychological Barrier 20 years anniversary 30/143

32. Powered by Rabbit 1.0.4 Psychological Barrier Anniversary Driven Development 31/143

33. Powered by Rabbit 1.0.4 Psychological Barrier ADD 32/143

34. Powered by Rabbit 1.0.4 RubyConf2001 new VM new GC native

    thread embeddable API 33/143

35. Powered by Rabbit 1.0.4 new VM for performance 34/143

36. Powered by Rabbit 1.0.4 new VM Implemented by Ruby1.9 (YARV)

    35/143

37. Powered by Rabbit 1.0.4 new GC GC performance 36/143

38. Powered by Rabbit 1.0.4 new GC Generatoinal GC 37/143

39. Powered by Rabbit 1.0.4 new GC Gave up 38/143

40. Powered by Rabbit 1.0.4 new GC Ruby1.9 improved GC 39/143

41. Powered by Rabbit 1.0.4 new GC Lazy Sweeping 40/143

42. Powered by Rabbit 1.0.4 new GC Bitmap marking (2.0) 41/143

43. Powered by Rabbit 1.0.4 native thread green thread til 1.8

    42/143

44. Powered by Rabbit 1.0.4 native thread stack copying 43/143

45. Powered by Rabbit 1.0.4 native thread linking threading library problem

    44/143

46. Powered by Rabbit 1.0.4 native thread Ruby1.9 uses native thread

    45/143

47. Powered by Rabbit 1.0.4 native thread with GIL 46/143

48. Powered by Rabbit 1.0.4 native thread Giant Interpreter Lock 47/143

49. Powered by Rabbit 1.0.4 native thread thread safe core 48/143

50. Powered by Rabbit 1.0.4 native thread fine grained lock problem

    49/143

51. Powered by Rabbit 1.0.4 native thread Compromise 50/143

52. Powered by Rabbit 1.0.4 embeddable API Gave up 51/143

53. Powered by Rabbit 1.0.4 embeddable API Compatibility matters 52/143

54. Powered by Rabbit 1.0.4 　 Ruby2 in 2001 53/143

55. Powered by Rabbit 1.0.4 　 Done in Ruby1.9 54/143

56. Powered by Rabbit 1.0.4 　 The origin of Ruby2.0 today

    55/143

57. Powered by Rabbit 1.0.4 　 RubyConf2003 56/143

58. Powered by Rabbit 1.0.4 RubyConf2003 New Hash literals Keyword arguments

    Method combination Selector namespace 57/143

59. Powered by Rabbit 1.0.4 New Hash literals {:foo => 1,

    :bar => 2} as {foo: 1, bar: 2} 58/143

60. Powered by Rabbit 1.0.4 New Hash literals Done in 1.9

    59/143

61. Powered by Rabbit 1.0.4 Method combination Allowing method decoration 60/143

62. Powered by Rabbit 1.0.4 Selector namespace Monkey patching with scope

    61/143

63. Powered by Rabbit 1.0.4 　 New features in Ruby2.0 62/143

64. Powered by Rabbit 1.0.4 New features in 2.0 Keyword arguments

    Module#prepend Enumerable#lazy Refinements 63/143

65. Powered by Rabbit 1.0.4 New features in 2.0 symbol array

    literals to_h conversion method UTF-8 by default Dtrace / TracePoint 64/143

66. Powered by Rabbit 1.0.4 　 Keyword Arguments 65/143

67. Powered by Rabbit 1.0.4 Keyword Arguments Named optinal arguments No

    specific order Descriptive Easy-to-remember 66/143

68. Powered by Rabbit 1.0.4 Keyword Arguments log("Hello!", level: "INFO") Possoble

    in Ruby1.9 67/143

69. Powered by Rabbit 1.0.4 Keyword Arguments in 1.9 def log(msg,

    opt = {}) level = opt[:level] || "ERROR" time = opt[:time] || Time.now puts "#{ time.ctime } [#{ level }] #{ msg }" end 68/143

70. Powered by Rabbit 1.0.4 Keyword Arguments in 1.9 What if

    you want to combin with arbitrary number of arguments descriptive exceptions pass nil as a valid value 69/143

71. Powered by Rabbit 1.0.4 Keyword Arguments in 1.9 def log(*msgs)

    opt = msgs.last.is_a?(Hash) ? msgs.pop : {} level = opt.key?(:level) ? opt.delete(:level) : "ERROR" time = opt.key?(:time) ? opt.delete(:time) : Time.now raise "unknown keyword: #{ opt.keys.first }" if !opt.empty? msgs.each {|msg| puts "#{ time.ctime } [#{ level }] #{ msg }" } end 70/143

72. Powered by Rabbit 1.0.4 Keyword Arguments in 2.0 def log(msg,

    level: "ERROR", time: Time.now) puts "#{ time.ctime } [#{ level }] #{ msg }" end 71/143

73. Powered by Rabbit 1.0.4 Keyword Arguments in 2.0 Simpler More

    descriptive API Easy to read Easy to write 72/143

74. Powered by Rabbit 1.0.4 Keyword Arguments in 2.0 log("Hello!", **opt)

    You can pass existing hash as keyword arguments 73/143

75. Powered by Rabbit 1.0.4 Keyword Arguments in 2.0 def log(msg,

    level: "ERROR", time: Time.now, **kw) puts "#{ time.ctime } [#{ level }] #{ msg }" end You can get keyword arguments as a hash Unkown keywords do not raise error 74/143

76. Powered by Rabbit 1.0.4 Keyword Arguments in 2.0 Summary Easy

    API More descriptive Rails prefer keyword arguments 75/143

77. Powered by Rabbit 1.0.4 　 Module#prepend 76/143

78. Powered by Rabbit 1.0.4 Module#prepend Method combination Decrating existing methods

    77/143

79. Powered by Rabbit 1.0.4 alias method chain Decorate existing methods

    using aliases AcriveSupport 78/143

80. Powered by Rabbit 1.0.4 alias method chain class A def

    foo; puts "foo"; end end class A # reopen def foo_with_bar foo_without_bar puts "bar" end alias_method_chain :foo, :bar end A.new.foo 79/143

81. Powered by Rabbit 1.0.4 alias method chain def alias_method_chain(target, feature)

    alias_method "#{target}_without_#{feature}", target alias_method target, "#{target}_with_#{feature}" end 80/143

82. Powered by Rabbit 1.0.4 alias method chain problems many public

    methods spilled out accidental feature name conflict adding same feature set to classes 81/143

83. Powered by Rabbit 1.0.4 Method combination from CLOS(CommonLisp Object System)

    to extend existing methods confugurable via MOP 82/143

84. Powered by Rabbit 1.0.4 Method combination Standard combination in CLOS

    before hook after hook around hook 83/143

85. Powered by Rabbit 1.0.4 Method combination Confugurable via MOP and-combination

    or-combination whatever-combination 84/143

86. Powered by Rabbit 1.0.4 Method combination in CLOS Too complex

    for Ruby 85/143

87. Powered by Rabbit 1.0.4 Module#prepend Simplified Method Comnbination 86/143

88. Powered by Rabbit 1.0.4 Module#prepend Methods added by #include comes

    after exisiting methods #prepend put them before to wrap methods 87/143

89. Powered by Rabbit 1.0.4 Module#prepend class Foo def foo; p

    :foo; end end module Prepend def foo p :before super p :after end end class Foo prepend Prepend end Foo.new.foo 88/143

90. Powered by Rabbit 1.0.4 Module#prepend Summary Extending exising methods No

    method name conflict Package features in a module 89/143

91. Powered by Rabbit 1.0.4 　 Refinements 90/143

92. Powered by Rabbit 1.0.4 Refinements Scoped Monkey Patching 91/143

93. Powered by Rabbit 1.0.4 Monkey Patching Open class Reopen existing

    class/module Adding methods Replacing methods 92/143

94. Powered by Rabbit 1.0.4 Adding methods ActiveSupport 93/143

95. Powered by Rabbit 1.0.4 Adding methods 20.years.ago # => Sun

    Feb 28 17:32:42 94/143

96. Powered by Rabbit 1.0.4 Replacing methods mathn 95/143

97. Powered by Rabbit 1.0.4 Replacing methods 1 / 2 #=>

    0 96/143

98. Powered by Rabbit 1.0.4 Replacing methods require 'mathn' 1 /

    2 #=> 1/2 (Rational) 97/143

99. Powered by Rabbit 1.0.4 　 Open class is so strong

    98/143

100. Powered by Rabbit 1.0.4 　 Any Problem? 99/143

101. Powered by Rabbit 1.0.4 Problems Name conflict Behavior conflict 100/143

102. Powered by Rabbit 1.0.4 　 Global modification is bad 101/143

103. Powered by Rabbit 1.0.4 Scoped enhancement Refinement 102/143

104. Powered by Rabbit 1.0.4 Refinements module R refine String do

     def foo ... end end end "".foo # => error! using R "".foo 103/143

105. Powered by Rabbit 1.0.4 Other Languages Selector namespace (Smallscript) Classbox

     (Smalltalk/Java) Extended Method (C#) 104/143

106. Powered by Rabbit 1.0.4 Selector namespace No one knows Smallscript

     Smallscript still alive? Very complex 105/143

107. Powered by Rabbit 1.0.4 Classbox Scoped class modification Local rebinding

     Dynamic scope 106/143

108. Powered by Rabbit 1.0.4 Extended Methods Can only add methods

     No replacing 107/143

109. Powered by Rabbit 1.0.4 　 Enumerable#lazy 108/143

110. Powered by Rabbit 1.0.4 Enumerable#lazy for Lazy evaluation 109/143

111. Powered by Rabbit 1.0.4 Enumerable#lazy Inspired by functional programming 110/143

112. Powered by Rabbit 1.0.4 Enumerable#lazy Functional programming wannabe 111/143

113. Powered by Rabbit 1.0.4 Functional programming wannabe Immutable data Pattern

     matching Lazy evaluation Function composition 112/143

114. Powered by Rabbit 1.0.4 Function composition sort of method chains

     in Ruby 113/143

115. Powered by Rabbit 1.0.4 Method chains (1..Float::INFINITY).map {|i| i.to_s }.select{|s|

     /3/ === s }.first(5) This doesn't work 114/143

116. Powered by Rabbit 1.0.4 Method chains If we had lazy

     evaluation.. 115/143

117. Powered by Rabbit 1.0.4 Lazy evaluation What if we had

     lazy version of enumerating methods 116/143

118. Powered by Rabbit 1.0.4 Lazy evaluation map_lz, select_lz 117/143

119. Powered by Rabbit 1.0.4 Method chains (1..Float::INFINITY).map_lz {|i| i.to_s }.select_lz{|s|

     /3/ === s }.first(5) 118/143

120. Powered by Rabbit 1.0.4 Lazy evaluation Lazy people need lazy

     evaluation 119/143

121. Powered by Rabbit 1.0.4 Lazy evaluation to lazy to add

     _lz all the time 120/143

122. Powered by Rabbit 1.0.4 Enumerable#lazy (1..Float::INFINITY).lazy.map {|i| i.to_s }.select{|s| /3/

     === s }.first(5) 121/143

123. Powered by Rabbit 1.0.4 Enumerable#lazy Looks better 122/143

124. Powered by Rabbit 1.0.4 　 Symbol array literals 123/143

125. Powered by Rabbit 1.0.4 Symbol array literals %i(foo bar baz)

     124/143

126. Powered by Rabbit 1.0.4 　 to_h conversion method 125/143

127. Powered by Rabbit 1.0.4 to_h conversion method Hash, ENV, Struct

     to have to_h 126/143

128. Powered by Rabbit 1.0.4 to_i and to_int to_i for explicit

     conversion to_int for implicit conversion 127/143

129. Powered by Rabbit 1.0.4 conversion methods to_i and to_int to_s

     and to_str to_h and to_hash 128/143

130. Powered by Rabbit 1.0.4 　 UTF-8 by default 129/143

131. Powered by Rabbit 1.0.4 UTF-8 by default No magic comment

     needed 130/143

132. Powered by Rabbit 1.0.4 UTF-8 by default Unicode everywhere now

     131/143

133. Powered by Rabbit 1.0.4 Dtrace/TracePoint Better debug/profile support 132/143

134. Powered by Rabbit 1.0.4 Performance VM GC require 133/143

135. Powered by Rabbit 1.0.4 　 Ruby 2.0 134/143

136. Powered by Rabbit 1.0.4 　 Now works on Heroku 135/143

137. Powered by Rabbit 1.0.4 　 136/143

138. Powered by Rabbit 1.0.4 Ruby2.0 working under the platform 137/143

139. Powered by Rabbit 1.0.4 Ruby2.0 and beyond I have no

     idea (yet) 138/143

140. Powered by Rabbit 1.0.4 Ruby2.1 We made a 2.1 branch

     139/143

141. Powered by Rabbit 1.0.4 Ruby2.1 Coming next Christmas (hopefull) 140/143

142. Powered by Rabbit 1.0.4 Ruby2.1 less strict Unicode validation even

     better perfomance 141/143

143. Powered by Rabbit 1.0.4 　 Thank you 142/143

144. Powered by Rabbit 1.0.4 　 Any Questions? 143/143