What a hard work to make the recipe sharing service available on Ruby 1.9.3!

This is presented in oedorubykaigi03

Transcript

1. ๭ϨγϐαΠτͷ Ruby 1.9.3 ରԠͰۤ࿑͠·ͨ͠
   mrkn
   Kenta Murata
   What a hard work to make the recipe
   sharing service available on Ruby 1.9.3!
   2013.03.16 #odrk03
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2. Kenta Murata (mrkn)
   DevInfra Engineer
   at COOKPAD Inc.
   Ruby committer
   http://www.flickr.com/photos/kakutani/8526732201/
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4. Kenta Murata (mrkn)
   DevInfra Engineer
   at COOKPAD Inc.
   Ruby committer
   http://www.flickr.com/photos/kakutani/8526732201/
   4
   

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5. Kenta Murata (mrkn)
   DevInfra Engineer
   at COOKPAD Inc.
   Ruby committer
   http://www.flickr.com/photos/kakutani/8526732201/
   BATMAN
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8. Run on 1.9.3-p392 since 26 Feb 2013
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9. Run on 1.9.3-p392 since 26 Feb 2013
   We’ll move to 2.0.0-p0 next month !!!
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10. REE 1.9.3 2.0.0
    809
    576
    497
    REE 1.9.3 2.0.0
    1773
    1305
    1166
    ฏۉϨεϙϯελΠϜ [ms] 90% Line [ms]
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11. http://info.cookpad.com/
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13. http://bit.ly/cookpad_jobs
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14. 1.9.3 ҠߦͰ
    ۤ࿑ͨ͠ࣄ
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15. Ϛδίϝ
    then/do ͷ୅ΘΓͷ :
    Πϯελϯεม਺ΛϒϩοΫύϥϝʔλʹ࢖͏ͳ
    Temp le ͷΦʔϓϯϞʔυ͸ ‘w+’
    Hash ͷॱং໰୊
    Array#to_s ͱ Hash#to_s
    (time .. time).include? time
    Date#step with ActiveSupport::Duration
    enum_with_index
    lambda ͷҾ਺Ϛονϯά
    next Ͱ͸ϝιου͔Βൈ͚ΒΕͳ͍Α
    ଟॏ୅ೖ
    Symbol#to_int ͷͪΐͬͱྑ͍࿩
    ਖ਼نදݱͷඇޓ׵ੑ
    nkf, kconv, jcode, iconv
    ΦϦδφϧ String#blank?
    ActiveRecord ͱ nil.id
    ϝʔϧ
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16. # coding: utf-8
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17. ౰࣌͸ΈΜͳॻ͍ͯ͘Εͳ͔ͬͨ
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18. script/insert_magic_comment
    13
    

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19. #! /usr/bin/env ruby
    # coding: utf-8
    def has_magic_comment?(content)
    if content.lines.first =~ /\A#!/
    first_line = content.lines.take(2).last
    else
    first_line = content.lines.first
    end
    comment = first_line.sub(
    /(?:\"(?:[^"]|\\\")*\"|\'(?:[^']|\\\')*\'|[^#]*)#/, '').strip
    comment =~ /\b(?:en)?coding\s*:\s*(?:utf|UTF)-?8\b/
    end
    def insert_magic_comment(path)
    content = open(path, 'rb') {|io| io.read } rescue $!
    return if Exception === content || content.empty?
    content.force_encoding('BINARY') if content.respond_to?(:force_encoding)
    unless has_magic_comment?(content)
    if content =~ /[^\x00-\x7E]/m
    $stderr.puts "inserting magic comment to #{path}"
    open(path, 'wb') do |io|
    io.puts "# coding: utf-8"
    io.write content
    end
    end
    end
    end
    if ARGV[0] == '--pre-commit'
    open("|git diff --cached --name-only HEAD") do |io|
    while path = io.gets
    path.strip!
    next unless path =~ /\.rb$/
    insert_magic_comment(path)
    end
    end
    else
    require 'find'
    Find.find(Dir.pwd) do |path|
    next unless path =~ /\.rb$/
    insert_magic_comment(path)
    end
    end
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20. https://gist.github.com/
    mrkn/5173137
    http://bit.ly/cookpad_jobs
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21. if condition:
    when condition:
    while condition:
    16
    

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22. items.each do |@item|
    17
    

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23. view template ಺Ͱࢄݟ
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24. <%# index.html.erb %>
    
    <% @items.each_with_index do |@item, idx| -%>
    
    <%= render ‘item’ %>
    
    <% end -%>
    
    <%# _item.html.erb %>
    
    name<%= @item.title %>
    description<%= @item.description %>
    ...
    
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25. ϨϯμϦϯά͞ΕΔ·Ͱ
    syntax error ͕஗Ԇ͢Δ
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26. Ͳͷ partial view ͔
    Βࢀর͞ΕͯΔ͔ௐ΂
    Δͷ͕େมͳͷͰ୯७
    ʹ @ ΛऔΔͱࢮ͵
    21
    

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27. શͯෛ࠴Ͱஔ͖׵͑ͨ
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28. <%# index.html.erb %>
    
    <% @items.each_with_index do |item, idx| @item = item -%>
    
    <%= render ‘item’ %>
    
    <% end -%>
    
    <%# _item.html.erb %>
    
    name<%= @item.title %>
    description<%= @item.description %>
    ...
    
    23
    

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29. Tempfile ͷΦʔϓϯ
    Ϟʔυ͕ ‘w+’ ݻఆ໰୊
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30. default_external ͸ UTF-8
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31. ςϯϙϥϦϑΝΠϧʹ
    JPEG Λॻ͖ࠐΊͳ͍
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32. ͓ྉཧͷࣸਅΛอଘ
    Ͱ͖ͳ͍ʼʻ
    27
    

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33. tf.set_encoding(‘BINARY’) \
    ! if tf.respond_to? :set_encoding
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34. Hash ͷॱং໰୊
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35. # ruby-1.8.7 ͷ৔߹
    {:a => 1, :b => 2}.to_a
    #=> [[:b, 2], [:a, 1]]
    # ruby-1.9.3 ͷ৔߹
    {:a => 1, :b => 2}.to_a
    #=> [[:a, 1], [:b, 2]]
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36. Hash ͷ map ʹΑΔ݁
    ՌΛݕূ͢Δςετͱ͔
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37. to_s ͷڍಈͷมԽ
    32
    

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38. Array#to_s ͕
    join(“”) ૬౰ͩͬͨ
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39. # ruby-1.8.7 ͷ৔߹
    %w(a b c).to_s #=> “abc”
    # ruby-1.9.3 ͷ৔߹
    p %w(a b c).to_s #=> "[\"a\", \"b\", \"c\"]"
    34
    

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40. # ruby-1.8.7 ͷ৔߹
    [:foo].to_s #=> “foo”
    [:foo].first.to_s #=> “foo”
    # ruby-1.9.3 ͷ৔߹
    [:foo].to_s #=> “[:foo]”
    [:foo].first.to_s #=> “foo”
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41. ໌࣏తʹ to_s ΛݺΜ
    ͰΔίʔυͳΜͯͦ
    Μͳʹͳ͍
    36
    

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42. # ruby-1.8.7 ͷ৔߹
    “#{[:foo]}” #=> “foo”
    “#{[:foo].first}” #=> “foo”
    # ruby-1.9.3 ͷ৔߹
    “#{[:foo]}” #=> “[:foo]”
    “#{[:foo].first}” #=> “foo”
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43. Hash#to_s ͕
    to_a.join(“”) ૬౰ͩͬͨ
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44. # ruby-1.8.7 ͷ৔߹
    p({:a => 1, :b => 2}.to_s)
    #=> “b2a1”
    # ruby-1.9.3 ͷ৔߹
    p({:a => 1, :b => 2}.to_s)
    #=> "{:a=>1, :b=>2}"
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45. (time .. time).include? time
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46. class Range
    def include_with_warn?(obj)
    if Time === self.begin
    caller.tap do |callstack|
    repository_root = File.expand_path(
    '../../../../../../../', __FILE__) + '/'
    offending_line = callstack.find {|line|
    File.expand_path(line.split(':').first).
    start_with?(repository_root)
    } || callstack.first
    $stderr.puts "[WARN] can't iterate from Time
    since 1.9 at #{offending_line}"
    end
    end
    include_without_warn?(obj)
    end
    alias include_without_warn? include?
    alias include? include_with_warn?
    end
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47. Date#step ͕
    ActiveSupport::Duration Λ
    ڋઈͩ͢͠
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48. # Ruby 1.9.3 Ͱಈ͔ͳ͘ͳͬͨίʔυ
    begin_date = Date.parse(“2013/03/01”)
    end_date = Date.parse(“2013/06/30”)
    begin_date.step(end_date, 1.week) do |date|
    ...
    end
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49. require 'date'
    class Date
    def step_with_warn(*args, &block)
    unless Numeric === args[1] || args[1].nil?
    $stderr.puts "\n[WARN] non-Numeric object is
    given for the 2nd argument of step at #{caller[0]}"
    $stderr.flush
    end
    step_without_warn(*args, &block)
    end
    alias step_without_warn step
    alias step step_with_warn
    end
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50. enum_with_index
    45
    

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51. each_with_index
    46
    

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52. lambda ͷҾ਺Ϛονϯά
    47
    

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53. # ApplicationHelper ͷத
    def init_handler(foo)
    Hash.new {|h, k|
    h[k] = lambda {}
    }.merge(foo)
    end
    # ΞϓϦέʔγϣϯίʔυ಺
    init_handler(@handlers)
    ...
    @handlers[:foo].call(model)
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54. wrong number of
    arguments (1 for 0)
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55. # ApplicationHelper ͷத
    def init_handler(foo)
    Hash.new {|h, k|
    h[k] = lambda {|*args| }
    }.merge(foo)
    end
    # ΞϓϦέʔγϣϯίʔυ಺
    init_handler(@handlers)
    ...
    @handlers[:foo].call(model)
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56. # ApplicationHelper ͷத
    def init_handler(foo)
    Hash.new {|h, k|
    h[k] = proc {}
    }.merge(foo)
    end
    # ΞϓϦέʔγϣϯίʔυ಺
    init_handler(@handlers)
    ...
    @handlers[:foo].call(model)
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57. ࢿྉ࡞ͬͯͯࢥͬͨ
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58. # null_proc.rb
    module NullProc
    class << self
    def call(*args); end
    alias [] call
    end
    end
    # ApplicationHelper ͷத
    require ‘null_proc’
    def init_handler(foo)
    Hash.new {|h, k|
    h[k] = NullProc
    }.merge(foo)
    end
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59. next Ͱϝιου͔Β
    ൈ͚Εͳ͘ͳͬͨ
    54
    

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60. class FooController
    def show
    ...
    next if params[:bar].blank?
    ...
    end
    end
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61. ࣮૷Λ Chanko ͔Β
    ίϯτϩʔϥຊମ΁Ҡ
    ಈ͢Δͱ͖ʹى͖Δ
    56
    

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62. Chanko ͸ Rails Ξ
    ϓϦέʔγϣϯΛ؆
    ୯ʹ֦ு͢Δ࢓૊Έ
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63. ֦ுػೳ͸ϒϩοΫ
    Ͱ࣮૷͢Δ
    58
    

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64. Chanko ͷதͰ࣮૷͞
    ΕͯΔؒ͸ɺ֦ுػೳ
    ͷத͔Β୤ग़͢Δͱ͖
    ͸ next Λ࢖͏
    59
    

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65. ࣮૷Λ Chanko ͔Β
    ίϯτϩʔϥຊମ΁Ҡ
    ಈ͢Δͱ͖ʹ return
    ʹஔ׵͠๨ΕΔ
    60
    

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66. ଟॏ୅ೖ
    61
    

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67. # Ruby 1.8.7
    lambda {|*a| b = *a }.call(1)
    #=> 1
    # Ruby 1.9.3
    lambda {|*a| b = *a }.call(1)
    #=> [1]
    62
    

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68. ΧϯϚΛ෇͚Ε͹ྑ͍
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69. # Ruby 1.8.7
    lambda {|*a| b, = *a; b }.call(1)
    #=> 1 ↑
    # Ruby 1.9.3
    lambda {|*a| b, = *a; b }.call(1)
    #=> 1 ↑
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70. Symbol#to_int
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71. # Ruby 1.8.7
    {:foo => “hello world”}[:foo][:bar]
    #=> nil
    # Ruby 1.9.3
    {:foo => “hello world”}[:foo][:bar]
    #=> can't convert Symbol into Integer (TypeError)
    66
    

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72. Ruby 1.9 Ͱ
    Symbol#to_int ͕ফ
    ͓͔͑ͨ͛Ͱόά͕
    ໌Β͔ʹʂʂ̍
    67
    

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73. ྑ͍࿩
    68
    

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74. ਖ਼نදݱͷඇޓ׵
    69
    

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75. \s ͷҙຯ (ޙड़)
    70
    

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76. \w ͱ \W ͱ
    \p{Word}
    71
    

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77. \w ͕ US-ASCII ͷൣ
    ғʹมΘͬͨ
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78. \p{Word} ͸ 1.8 Ͱਖ਼
    نදݱίϯύΠϧΤ
    ϥʔʹͳΔ
    73
    

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79. \w → \p{Word}
    \W →ɹ ???? ɹ
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80. if RUBY_VERSION >= ‘1.9’
    word = ‘\p{Word}’
    re = /(?!#{word})./
    else
    re = /\W/
    end
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81. ಠࣗͷ
    String#blank?
    76
    

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82. class String
    def blank?
    self =~ /\A[\sɹ]*\z/m
    end
    end
    ↑ IDEOGRAPHIC SPACE
    77
    

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83. ໰୊͸ IDEOGRAPHIC SPACE
    ͷํ͡Όͳͯ͘ \s ʹ͋Δ
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84. # for 1.8
    class String
    UTF8_WHITESPACE_CHAR_PATTERN =
    /(?:\s|\xE3\x80\x80)/.freeze
    UTF8_BLANK_PATTERN =
    /\A(?:#{UTF8_WHITESPACE_CHAR_PATTERN})*\z/.freeze
    end
    # for 1.9.3
    class String
    NON_BLANK_SPACE_CHARACTERS =
    "\u00A0\u1680\u180E\u2000-\u200B\u202F\u205F".freeze
    private_constant :NON_BLANK_SPACE_CHARACTERS
    UTF8_WHITESPACE_CHAR_PATTERN =
    /(?:(?![#{NON_BLANK_SPACE_CHARACTERS}])\p{Space})/.freeze
    UTF8_BLANK_PATTERN =
    /\A(?:#{UTF8_WHITESPACE_CHAR_PATTERN})*\z/.freeze
    end
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85. จࣈΤϯίʔσΟϯάม׵ܥ
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86. NKF ޓ׵ϝιου
    81
    

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87. # Ruby 1.8.7
    class String
    def to_win31j_from_utf8
    NKF.nkf(‘-W -s -m0 -x’, self)
    end
    end
    # Ruby 1.9.3
    class String
    def to_win31j_from_utf8
    encode('Windows-31J', 'UTF-8',
    invalid: :replace,
    undef: :replace,
    replace: '')
    end
    end
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88. kconv ͷϝιουͰ
    ܯࠂΛग़͢
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89. # Ruby 1.8.7
    class String
    def tosjis_with_warn
    $stderr.puts “[WARN] ... #{caller[0]}”
    tosjis_without_warn
    end
    alias tosjis_without_warn tosjis
    alias tosjis tosjis_with_warn
    end
    # Ruby 1.9.3
    class String
    def tosjis
    $stderr.puts “[WARN] ... #{caller[0]}”
    encode(‘Windows-31J’,
    invalid: :replace,
    undef: :replace,
    replace: '')
    end
    end
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90. ܯࠂΛग़͢Α͏ʹͯ͠
    ͓͘ࣄͰɺαʔϏε
    ։ൃΤϯδχΞ͕ؾ
    ෇͍ͯमਖ਼ͯ͘͠ΕΔ
    85
    

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91. ActiveRecord ͱ
    nil.id
    86
    

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92. 1.8 Ͱ͸ nil.id ͕ 4 Λ
    ฦ͢ͷͰྫ֎͕ग़ͳ͍
    87
    

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93. if Rails.application.config.whiny_nils
    require 'active_support/whiny_nil'
    end
    if RUBY_VERSION < '1.9'
    class NilClass
    def id_with_warn(*args)
    return 4 unless File.expand_path(caller[0]).
    starts_with?(Rails.root)
    message = "nil.id was called at #{caller[0]}"
    if defined? Logger
    Logger.error.post('nil.id', message)
    else
    $stderr.puts message
    end
    4
    end
    alias id_without_warn id
    alias id id_with_warn
    end
    end
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94. ϝʔϧؔ܎
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95. ଧ౗ tmail
    90
    

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96. tmail → mail.gem
    91
    

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97. ۤߦ
    92
    

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98. tmail ͷόάʹґଘ
    ͨ͠ίʔυ͕͋ͬͨ
    93
    

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99. ·ͩઓ͍͸ऴΘͬͯ
    ͳ͍ɾɾɾ
    94
    

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100. ײ૝
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101. ྑ͘ͳ͍ίʔυΛېࢭ
     ͢Δඇޓ׵ੑ͸େ׻ܴ
     96
     

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102. items.each do |@item|
     97
     

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103. ศརͩͬͨࣄ͕Ͱ͖
     ͳ͘ͳΔͱ൵͍͠
     98
     

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104. # Ruby 1.9.3 Ͱಈ͔ͳ͘ͳͬͨίʔυ
     begin_date = Date.parse(“2013/03/01”)
     end_date = Date.parse(“2013/06/30”)
     begin_date.step(end_date, 1.week) do |date|
     ...
     end
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105. Ҡߦ TIPS
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106. Ruby ͷόʔδϣϯผ
     ʹϞϯΩʔύονΛ
     ੔ཧ
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107. lib/
     monkey_patches/
     ruby/
     1.8/
     array/
     object/
     string/
     blank.rb
     conversion.rb
     encoding.rb
     multibyte.rb
     1.9/
     array/
     object/
     string/
     blank.rb
     conversion.rb
     encoding.rb
     multibyte.rb
     2.0/
     common/
     102
     

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108. # config/initializers/000_load_libs.rb
     FileUtils.chdir(‘../../../lib’, __FILE__) do
     # load monkey patches for ruby first
     Dir[‘monkey_patches/ruby/**/*.rb’].sort.each do |fn|
     version = fn.split(‘/’)[2]
     case
     when version == ‘common’
     # do nothing
     when RUBY_VERSION < ‘1.9’
     next unless version == ‘1.8’
     when RUBY_VERSION < ‘2.0’
     next unless version == ‘1.9’
     when RUBY_VERSION < ‘2.1’
     next unless (‘1.9’...‘2.1’).cover? version
     else
     next unless version >= ‘2.1’
     end
     require fn
     end
     end
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109. ৽͍͠όʔδϣϯͰ
     ૿͑Δϝιου͸
     ύονͰಋೖ͢Δ
     104
     

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110. Object#singleton_c
     lass
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111. # for 1.8
     class Object
     def singleton_class
     class << self
     self
     end
     end
     end
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112. String#bytesize
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113. # for 1.8
     class String
     alias bytesize size
     end
     108
     

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114. String#b
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115. # for 1.8
     class String
     def b
     self
     end
     end
     # for 1.9
     class String
     def b
     dup.force_encoding(‘ASCII-8BIT’)
     end
     end
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116. String#force_enco
     ding
     111
     

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117. # for 1.8
     class String
     def force_encoding(enc)
     self
     end
     end
     112
     

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118. ࣮͸͜ΕͰ͸ବ໨
     113
     

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119. respond_to?
     (:force_encoding) Ͱ 1.9
     ͔Ͳ͏͔൑அͯ͠ΔϥΠϒ
     ϥϦ͕͍͔ͭ͘ଘࡏ͢Δ
     114
     

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120. # for 1.8
     class String
     def method_missing_with_force_encoding(name, *args, &block)
     if name == :force_encoding
     self
     else
     method_missing_without_force_encoding(
     name, *args, &block)
     end
     end
     alias method_missing_without_force_encoding method_missing
     alias method_missing method_missing_with_force_encoding
     end
     115
     

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121. ΤϯίʔσΟϯάม
     ׵
     116
     

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122. from ͱ to ͷΤϯ
     ίʔσΟϯάΛݶఆ
     ͢Δͱಋೖ͠΍͍͢
     117
     

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123. ͨͬͨ͜Ε͚ͩͰΞϓ
     Ϧέʔγϣϯίʔυ͔
     Β RUBY_VERSION Λ
     ݮΒͤΔ
     118
     

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124. ͓·͚
     119
     

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125. irb(main):005:0> keys = (:a .. :d).to_a
     => [:a, :b, :c, :d]
     irb(main):006:0> values = (1 .. 4).to_a
     => [1, 2, 3, 4]
     irb(main):007:0> Hash[keys.zip(values)]
     => {:a=>1, :b=>2, :c=>3, :d=>4}
     120
     

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126. Time.now Λ্ॻ͖͢Δ
     ͷ͸ࢭΊΑ͏ ʼʻ
     121
     

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127. ·ͱΊ
     122
     

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128. REE 1.9.3 2.0.0
     809
     576
     497
     REE 1.9.3 2.0.0
     1773
     1305
     1166
     ฏۉϨεϙϯελΠϜ [ms] 90% Line [ms]
     Use Ruby 2.0.0 !!!
     123
     

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129. View Slide

130. View Slide

131. http://bit.ly/cookpad_jobs
     125
     

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