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Practical Meta Programming
on Rails Application
3BJMTΞϓϦͰͷ
࣮༻తϝλϓϩάϥϛϯά
MOROHASHI Kyosuke
@2013-10-19 ߴRubyΤϯδχΞҭߨ࠲
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ॾڮګհ(@moro)
Kyosuke MOROHASHI
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No content
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No content
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Agenda
✓
ϝλϓϩάϥϛϯάͱͳʹ͔
✓
ϦϑϨΫγϣϯtoolbox
✓
࣮༻ϝλϓϩάϥϛϯά
✓
ڞ௨ػೳͷநग़
✓
ϥΠϒϥϦͷ࡞Γํ
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ࠓͷΰʔϧ
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✓ RubyͰϝλϓϩάϥϛϯά";ͭ
͏"ͩͱࢥ͑ΔΑ͏ʹͳΔ
✓
ϝλϓϩάϥϛϯά༻ͷRubyͷػೳʹͭ
͍ͯɺུ֓Λ͔ͭΉ
✓
࣮ફతʹϝλϓϩάϥϛϯά͢Δͱ͖ͷ
ҙɾߟ͑ํΛཧղ͢Δ
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http://www.amazon.co.jp/exec/obidos/ASIN/4048687158/morodiary05-22/ref=noism
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✓ RubyͰϝλϓϩάϥϛϯά";ͭ
͏"ͩͱࢥ͑ΔΑ͏ʹͳΔ
✓
ϝλϓϩάϥϛϯά༻ͷRubyͷػೳʹͭ
͍ͯɺུ֓Λ͔ͭΉ
✓
࣮ફతʹϝλϓϩάϥϛϯά͢Δͱ͖ͷ
ҙɾߟ͑ํΛཧղ͢Δ
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ϝλϓϩάϥ
ϛϯά
ͱͳʹ͔
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“
ϝλϓϩάϥϛϯάͱɺ
ݴޠཁૉΛ࣮ߦ࣌ʹૢ࡞͢
ΔίʔυΛهड़͢Δ͜ͱ
ʮϝλϓϩάϥϛϯάRubyʯ
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Rubyͷݴޠཁૉ
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✓ Ϋϥε
✓ Ϟδϡʔϧ
✓ ΦϒδΣΫτ ͱͦͷঢ়ଶΠϯελϯεม
✓ ϝιου
✓ खଓ͖
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class Book
def title
@title
end
def title=(title)
@title = title
end
end
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class Book
def title
@title
end
def title=(title)
@title = title
end
end
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ݴޠཁૉΛૢ࡞ͯ͠
Կग़͍ͯΔ
'title'͔Β͍Ζ
͍ΖͰ͖ͳ͍͔?
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class Book
attr_accessor :title
end
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def attr_accessor(name)
define_method(name) do
instance_variable_get("@#{name}")
end
define_method("#{name}=") do |val|
instance_variable_set("@#{name}", val)
end
end
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define_method(:title) do
instance_variable_get("@title")
end
define_method("title=") do |val|
instance_variable_set("@title", val)
end
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define_method(:title) do
instance_variable_get("@title")
end
define_method("title=") do |val|
instance_variable_set("@title", val)
end
ϝιουΛಈతʹՃ
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define_method(:title) do
instance_variable_get("@title")
end
define_method("title=") do |val|
instance_variable_set("@title", val)
end
ΠϯελϯεมΛ
ม໊Λͬͯૢ࡞
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3VCZͰɺϝλϓ
ϩάϥϛϯάͱͦ͏
Ͱͳ͍ͷͱʹ
໌֬ͳ۠ผͳ͍
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·ͱΊϝλϓϩάϥϛϯάͱ
✓
ݴޠཁૉΛૢ࡞͢Δ
✓
࣮ಛผͳͷͰͳ͍
✓ RubyͰৗతʹ͍ͬͯΔ
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ϦϑϨΫγϣϯ
toolbox
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“ϦϑϨΫγϣϯ (re ection) ͱ
ɺϓϩάϥϜͷ࣮ߦաఔͰϓ
ϩάϥϜࣗͷߏΛಡΈऔͬ
ͨΓॻ͖͑ͨΓ͢Δٕज़ͷ͜
ͱͰ͋Δɻ
http://ja.wikipedia.org/wiki/ϦϑϨΫγϣϯ _(ใֶ)
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http://www.amazon.co.jp/exec/obidos/ASIN/4048687158/morodiary05-22/ref=noism
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✓ RubyͰΫϥεͦΕࣗΦϒδΣΫ
τͰ͋Δ
✓ ModuleΫϥεΛܧঝͨ͠ɺClassΫϥε
ͷΦϒδΣΫτ
✓
มʹೖΕͨΓɺҾʹͨ͠ΓͰ͖Δ
Class.is_a?(Object) #=> true
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klasses = {
'array klass' => Array,
'hash klass' => Hash,
}
def class_name(klass)
klass.name
end
klasses['array klass'].new #=> []
class_name(klasses['hash klass']) #=> "Hash"
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✓
ΫϥεఆٛΛมߋ͢Δϝιου͕͋Δ
✓ includeextenddefine_method
ModuleΫϥεͷϝιου
Class.is_a?(Object) #=> true
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✓
ॲཧͦͷͷΛΦϒδΣΫτͱ
ͯ͠ѻ͑Δ
✓ Rubyͷେ͖ͳັྗͷҰͭ
ϒϩοΫ(Proc)
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# イテレータや処理の差し替え
multiplier = ->(i) { i * 2 }
square = ->(i) { i ** 2 }
[1, 2, 3].map(&multiplier)
[1, 2, 3].map(&square)
# リソースの開閉
File.open(path, 'w') {|f| f.puts('content') }
# 遅延評価
scope :fresh,
-> { where('created_at > ?', 3.hour.ago) }
ϒϩοΫ(Proc)
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3VCZͷڭ͑ͯ͘Εͨ͜ͱ
ౡాߒೋ
[email protected]
— You must unlearn what you have learned.
݄
ࡳຈ3VCZձٞ
http://www.slideshare.net/snoozer05/20101204-youmustunlearnwhatyouhavelearned
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✓
ҾͰࢦఆͨ͠ϝιουΛݺͼग़͢
✓
ͭ·Γɺݺͼग़͢ϝιουΛϓϩάϥϜ
తʹมߋͰ͖Δ
Object#send
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def up_or_down(condition)
up_or_down = condition ? :upcase ? :downcase
'Ruby'.send(up_or_down)
end
up_or_down(true) # => 'RUBY'
up_or_down(false) # => 'ruby'
Object#send
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✓
ϞδϡʔϧΫϥεʹɺΠϯελϯεϝ
ιουΛՃ͢Δϝιου
✓ defͷϦϑϨΫγϣϯ൛
✓
ϝιουͷதΛϒϩοΫͰॻ͘
✓
ͦͷͨΊϒϩοΫ֎ͷม͕ݟ͑Δ
define_method
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class Foo
foo = 'FOO'
define_method(:foo1) do
puts foo + '1'
end
def foo2
puts foo + '2'
end
end
obj = Foo.new
obj.foo1 #=> 'FOO1'
obj.foo2 #=> NameError
define_method
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✓
จࣈྻͰॻ͔ΕͨRubyࣜϒϩοΫΛɺ
ΫϥεΠϯελϯεͷίϯςΩετͰ
ධՁ͢Δ
class_eval/
instance_eval
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✓ class_eval (module_eval)Λ͏γʔϯ
✓ ClassΫϥεͷprivateϝιουΛݺΜͩΓɺ
✓ Classʹ͋ͱ͔ΒϝιουΛՃͨ͠Γ͢Δ
✓ instance_eval Λ͏γʔϯ
✓
ΠϯελϯεͷΠϯελϯεมΛࢀর͢Δ
✓ privateϝιουΛݺͿ
class_eval/
instance_eval
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class Foo
def initialize(message)
@message = message
end
end
Foo.class_eval %q[
def greet
"#{@message} you!"
end
]
foo = Foo.new('hi')
p foo.greet #=> 'hi you!'
p foo.instance_eval { @message } #=> 'hi'
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✓
ΠϯελϯεมΛ໊લϕʔεͰऔಘ͠
ͨΓઃఆͨ͠ΓͰ͖Δ
✓
͓ͳ͡Α͏ʹclass_varaible_set/
get͋Δ
instance_variable_set/
instance_variable_get
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class Foo
def initialize(message)
@message = message
end
end
foo = Foo.new('hi')
foo.instance_variable_get('@message') #=> 'hi'
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✓
ଘࡏ͠ͳ͍ϝιουΛݺΕͨ
࣌ʹݺΕΔϝιου
✓ ActiveRecordͷଐੑऔಘϝιο
υͳͲʹΘΕ͍ͯΔ
method_missing
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class Foo
def method_missing(method, *args, &block)
if method = :hi
'hello'
else
super
end
end
end
Foo.new.hi #=> 'hello'
method_missing
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✓ mixinΫϥεϞδϡʔϧͷݴޠཁૉΛ
ૢ࡞͍ͯ͠Δ
✓ includeͦͷΫϥεͷΠϯελϯεϝι
ουΛՃ͢Δ
✓ extendͦͷΦϒδΣΫτʹ(ಛҟ)ϝιο
υΛՃ͢Δ
include,extend
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✓
Ϟδϡʔϧ͕include͞ΕͨΓextend͞Ε
ͨΓ͢Δͱ࣮ߦ͞ΕΔϑοΫ
✓
ܧঝͷλΠϛϯάͰ࣮ߦ͞ΕΔinherited
ϝιου͋Δ
included, extended
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module MyModule
def self.included(base)
"included by #{base}"
end
def self.extended(obj)
"extended by #{obj}"
end
end
class MyClass
include MyModule # => "included by MyClass"
end
MyClass.new.extend(MyModule) # => "extended by #
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✓ RailsʹΑΔincludeͷ֦ு
✓
ͦͷϞδϡʔϧʹ ClassMethods ͱ͍͏
Ϟδϡʔϧ͕͋ΕɺͦΕΛextend͢Δ
✓ included {} ͱ͍͏ɺincludedϑοΫ
૬ͷΫϥεϚΫϩ͕͋Δ
ActiveSupport::Concern
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module MyModule
included(base)
"included by #{base}"
end
module ClassMethods
def hi; 'hello' ; end
end
end
class MyClass
include MyModule # => "included by MyClass"
end
MyClass.hi # => "hello"
ActiveSupport::Concern
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·ͱΊϦϑϨΫγϣϯ
UPPMCPY
✓ RubyͷΫϥεʮΘΒ͔͍ʯ
✓
ૢ࡞͢ΔͨΊͷϝιου͕ͨ͘͞Μ͋Δ
✓
ʮϝλϓϩάϥϛϯάRubyʯ͓͢͢Ί
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࣮༻ϝλϓϩ
άϥϛϯά
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ϝλϓϩάϥ
ϛϯάͷ
མͱ݀͠
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Book = Class.new do
define_method(:initialize) do |attrs|
attrs.each do |key, value|
if respond_to?("#{key}=")
send("#{key}=", value)
else
instance_variable_set("@#{key}", value)
end
end
end
define_method(:price=) do |price_str|
instance_variable_set(
'@price',
price_str.delete(',').to_i
)
end
end
p Book.new(author: 'moro', price: '1,980')
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class Book
def initialize(attrs)
@author = attrs[:author]
self.price = attrs[:price]
end
def price=(price_str)
@price = Integer(price_str.delete(','))
end
end
Book.new(author: 'moro', price: '1,980')
#=> #
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✓
ϝλϓϩάϥϛϯάͷ
ίʔυ"͍͠"
✓
ͱΓΘ͚ϦϑϨΫγϣϯ
✓ sendظ, evalظ
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ϝλʹߟ͑ͯ
ϕλʹ࡞Δ
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ActiveRecord::Base.has_many assoc_name
assoc_name で指定された、複数の
子レコードへの関連を定義する。
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class Books < ActiveRecord::Base
has_many :reviews
end
Book#reviews
#reviews=
#review_ids
#review_ids=
...
Book#reviews.build
reviews.create
reviews.each {|review| ... }
reviews.where(...)
ͨ͘͞Μϝιου͕Ͱ͖Δ
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def has_many(name, opts = {})
class_eval <<-RUBY
def #{name}
klass = #{name.to_s.classify}
klass.where(#{fk}: id)
end
def #{name}=(value)
values.each do |value|
#{name.to_s.classify}.create!(...)
end
end
RUBY
end
ͦ͠͏ͳ࣮Πϝʔδ
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ActiveRecord::Base.has_many assoc_name
assoc_name で指定された、複数の
子レコードへの関連を扱うオブジェクトのための
ラッパーメソッドを定義する。
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Book#reviews
✓
ඥ͍͍ͯΔϨϏϡʔΛฦ͢ɺ
ͷͰͳ͍
✓
ʹඥͮ͘ϨϏϡʔ͕͋Δͱ͍͏
ؔ࿈Λද͢ΦϒδΣΫτΛฦ͢
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def define_readers
mixin.class_eval <<-CODE, __FILE__, __LINE__ +
def #{name}(*args)
association(:#{name}).reader(*args)
end
CODE
end
ؔ࿈Λද͢
ΦϒδΣΫτΛฦ͢
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Associationͷநग़
✓ owner ͱ target ͕͍Δ
✓ owner ͷ id ͱtarget ͷ fk Ͱݕࡧ
͢Δ scope Λ࡞Δ
✓ target Λϩʔυ͠ɺదʹϝϞԽ
✓
ՃআͷίʔϧόοΫΛཧ͢Δ
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= Active Record Associations
This is the root class of all associations
('+ Foo' signifies an included module Foo):
Association
SingularAssociation
HasOneAssociation
HasOneThroughAssociation
+ ThroughAssociation
BelongsToAssociation
BelongsToPolymorphicAssociation
CollectionAssociation
HasAndBelongsToManyAssociation
HasManyAssociation
HasManyThroughAssociation
+ ThroughAssociation
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✓
Ϩίʔυ͔ΒࢠϨίʔυΛ
Ҿ͘ϝιουΛ࡞Δ
✓
ϨίʔυͱࢠϨίʔυͱͷ
ؔ࿈Λද͢ΫϥεΛ࡞Δ
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def define_readers
mixin.class_eval <<-CODE, __FILE__, __LINE__ +
def #{name}(*args)
association(:#{name}).reader(*args)
end
CODE
end
ϦϑϨΫγϣϯͰ
ബ͍ϥούʔΛ࡞Δ
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·ͱΊ
࣮༻ϝλϓϩάϥϛϯά
✓
ϝλʹߟ͑ͯϕλʹ࡞Δ
✓
ϦϑϨΫγϣϯͰͭͳ͙
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ڞ௨ػೳͷ
நग़
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ߘνΣοΫ
ػೳͷྫ
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✓
هࣄ(Post)ͱίϝϯτ(Comment)ͱ
ը૾(Photo)ͷߘ༰ΛνΣοΫ
✓
ͦΕͧΕ͝ͱͷ༰Ͱ֎෦αʔϏ
εʹߘ͍ͨ͠
✓ PostλΠτϧͱຊจɺίϝϯτຊ
จɺը૾දࣔURL
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class Post < AR::Base
after_save :submit_content_monitoring
private
def submit_content_monitoring
content = [title, body].join("\n\n")
url = Rails.config.censoring_endpoint
req = Net::HTTP::Post.new(url.path)
req.set_form_data('content' => content)
Net::HTTP.start(url.hostname, url.port) do |htt
http.request(req)
end
end
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class Comment < AR::Base
...
def submit_content_monitoring
content = body
...
end
end
class Photo < AR::Base
...
def submit_content_monitoring
content =
"
"
...
end
end
"
...
end
end
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ڞ௨෦Λ
୳͢
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class Post < AR::Base
after_save :submit_content_monitoring
private
def submit_content_monitoring
content = [title, body].join("\n\n")
url = Rails.config.censoring_endpoint
req = Net::HTTP::Post.new(url.path)
req.set_form_data('content' => content)
Net::HTTP.start(url.hostname, url.port) do |htt
http.request(req)
end
end
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class Post < AR::Base
after_save :submit_content_monitoring
private
def submit_content_monitoring
Censoring.new(
[title, body].join("\n\n"),
Rails.config.censoring_endpoint
).submit
end
end
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class Censoring
def initialize(content, url)
@content = content
@url = url
end
def submit
req = Net::HTTP::Post.new(@url.path)
req.set_form_data('content' => @content)
Net::HTTP.start(@url.hostname, @url.port) do |h
http.request(req)
end
end
end
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class Post < AR::Base
after_save :submit_content_monitoring
private
def submit_content_monitoring
Censoring.new(
[title, body].join("\n\n"),
Rails.config.censoring_endpoint
).submit
end
end
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ϝλʹߟ͑ͯϕλʹ࡞Δ
ରΫϥε͝ͱʹɺߘ
νΣοΫ༰ΛΈཱͯ
ૹ৴͢ΔΫϥε͕΄͍͠
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class CensorAdapter
def initialize(endpoint, &block)
@endpoint = endpoint
@content_builder = block
end
def submit(record)
content = @content_builder.call(record)
Censoring.new(content, @endpoint).submit
end
end
# ----------------
post_adapter = CensorAdapter.new(endpoint) do |post|
[post.title, post.body].join("\n\n")
end
post_adapter.submit(post)
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class Post < AR::Base
@@censor_adapter =
CensorAdapter.new(config.endpoint) do |post|
[post.title, post.body].join("\n\n")
end
after_save :submit_content_monitoring
private
def submit_content_monitoring
@@censor_adapter.submit(self)
end
end
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class Comment < AR::Base
@@censor_adapter =
CensorAdapter.new(config.endpoint) do |comment|
comment.body
end
after_save :submit_content_monitoring
private
def submit_content_monitoring
@@censor_adapter.submit(self)
end
end
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class Photo < AR::Base
@@censor_adapter =
CensorAdapter.new(config.endpoint) do |photo|
"
"
end
after_save :submit_content_monitoring
private
def submit_content_monitoring
@@censor_adapter.submit(self)
end
end
"
end
after_save :submit_content_monitoring
private
def submit_content_monitoring
@@censor_adapter.submit(self)
end
end
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ϦϑϨΫγϣϯͰͭͳ͛Δ
ߘ͢ΔͨΊͷϝιουΛ
Ճͯ͠·ΘΔͷΛɺͳΜ
ͱ͔Ͱ͖ͳ͍͔
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module CeonsoringDsl
def censor_content(url, &block)
adapter = CensorAdapter.new(url, block)
after_save {|record| adapter.submit(record) }
end
end
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class Post < AR::Base
extend CensoringDsl
censor_content(config.endpoint) do |post|
[post.title, post.body].join("\n\n")
end
end
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QSPUJQ
࡞͍ͬͨΖΜͳΫϥεΛ
$PODFSOʹ·ͱΊΔ
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module Censorable
extend ActiveSupport::Concern
module ClassMethods
def censor_content(url, &block)
adapter = Censorable::Adapter.new(url, block
after_save {|record| adapter.submit(record)
end
end
class Adapter
...
class Request
...
end
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class Post < ActiveRecord::Base
include Censorable
censor_content(config.censoring_endpoint) do |pos
[post.title, post.body].join("\n\n")
end
end
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·ͱΊ
ڞ௨ػೳͷநग़
✓
ϝλʹߟ͑ͯϕλʹ࡞Δ
✓
ϦϑϨΫγϣϯͰͭͳ͙
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ϥΠϒϥϦͷ
࡞Γํ
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আʑʹ
ΞϓϦ
ϥΠϒϥϦ
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ػೳΛผϑΝΠϧʹ͚͔ͨΓ
ΞϓϦඇґଘʹͨ͠ͷ
app/**
lib/**
gem
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app/** ʹ͋ΔϥΠϒϥϦ
✓
࠷ॳʹநग़ͨ͠ػೳapp/
models ͳͲʹஔ͚Δ
✓ AR::BaseΛܧঝ͍ͯ͠ͳ͍Ϟσ
ϧ͋ͬͯΑ͍!
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lib/**ʹ͍ͬͯ͘
✓
ΞϓϦͷґଘΛͳ͘͢
✓
વͳ͕ΒɺΞϓϦϥΠϒϥϦʹґଘ
͍ͯ͠Δ
✓ LOAD_PATH௨͍ͬͯΔͷͰ
ͦͷ··͍͚࣋ͬͯΔ
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HFN
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No content
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✓
ར༻͍ͯ͠ΔgemͷɺҰࣜΈ
߹Θͤ(bundle)Λཧ͢Δ
✓
όʔδϣϯೖखॴཧͰ͖Δ
✓ gemͷͻͳܗ͕Ͱ͖Δ
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✓
ΠϚυΩͬΆ͍σΟϨΫτϦߏͰɺ
gemͷͻͳܗ͕Ͱ͖Δ
✓ gemͷϝλσʔλϑΝΠϧ*.gemspec
ΛຒΊΔ͚ͩͰgem͕Ͱ͖Δ
$ bundle gem name
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$ bundle gem censorable
create censorable/Gemfile
create censorable/Rakefile
create censorable/LICENSE.txt
create censorable/README.md
create censorable/.gitignore
create censorable/censorable.gemspec
create censorable/lib/censorable.rb
create censorable/lib/censorable/version.rb
Initializating git repo in /Users/moro/tmp/censorab
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Gem::Specification.new do |spec|
spec.name = "censorable"
spec.version = Censorable::VERSION
spec.authors = ["moro"]
spec.email = ["[email protected]"]
spec.description = %q{TODO: Write a gem descrip
spec.summary = %q{TODO: Write a gem summary
spec.homepage = ""
spec.license = "MIT"
spec.files = `git ls-files`.split($/)
spec.executables = spec.files.grep(%r{^bin/}) {
spec.test_files = spec.files.grep(%r{^(test|sp
spec.require_paths = ["lib"]
spec.add_development_dependency "bundler", "~> 1.
spec.add_development_dependency "rake"
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$ bundle exec rake build
censorable 0.0.1 built to pkg/censorable-0.0.1.gem.
# rubygems.orgのアカウントがあればすぐ公開できる
$ bundle exec rake release
ͱͯ؆୯ʹgem͕Ͱ͖Δ
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$ bundle gem censorable
create censorable/Gemfile
create censorable/Rakefile
create censorable/LICENSE.txt
create censorable/README.md
create censorable/.gitignore
create censorable/censorable.gemspec
create censorable/lib/censorable.rb
create censorable/lib/censorable/version.rb
Initializating git repo in /Users/moro/tmp/censorab
͋ͱlibͷԼʹ
༰Λ࣋ͬͯ͘Δ͚ͩ
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$ bundle gem censorable
create censorable/Gemfile
create censorable/Rakefile
create censorable/LICENSE.txt
create censorable/README.md
create censorable/.gitignore
create censorable/censorable.gemspec
create censorable/lib/censorable.rb
create censorable/lib/censorable/version.rb
Initializating git repo in /Users/moro/tmp/censorab
όʔδϣϯ͜ͷ
ϑΝΠϧʹॻ͍͍ͯ͘
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$ cat lib/censorable/version.rb
module Censorable
VERSION = "0.0.1"
end
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gem 'censorable', path:'/Users/moro/tmp/censorable'
or
gem 'censorable', github: 'moro/censorable'
or
gem 'censorable', git: 'git://github.com/moro/censo
Gem leʹՃ͢ΕOK
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ػೳΛผϑΝΠϧʹ͚͔ͨΓ
ΞϓϦඇґଘʹͨ͠ͷ
ผHFNʹͯ͠ΈΔςετ
ࣾڞ௨ϥΠϒϥϦͳͲ
ੈʹ͘ϦϦʔεͨ͠ϥΠϒϥϦ
app/**
lib/**
gem+path:
gem+git:
gem
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·ͱΊϥΠϒϥϦͷ࡞Γํ
✓
ΞϓϦέʔγϣϯ͔Β
আʑʹநग़͠ɺlibʹ͍࣋ͬͯ͘
✓ gemʹ͢Δʹɺ࡞Δͱ͖
͏࣌bundlerΛ׆༻͢Δ
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·ͱΊ
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ࠓͷΰʔϧ
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✓ RubyͰϝλϓϩάϥϛϯά";ͭ
͏"ͩͱࢥ͑ΔΑ͏ʹͳΔ
✓
ϝλϓϩάϥϛϯά༻ͷRubyͷػೳʹͭ
͍ͯɺུ֓Λ͔ͭΉ
✓
࣮ફతʹϝλϓϩάϥϛϯά͢Δͱ͖ͷ
ҙɾߟ͑ํΛཧղ͢Δ
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3VCZ3BJMTͷ։ൃͰɺ
ϝλϓϩάϥϛϯάͱɺͦ͏
Ͱͳ͍ͷͷ۠ผᐆດɻ
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͍͍ͭͬͯΔػೳ͕ɺ
࣮ಈతϝιουఆٛͩͬ
ͨΓ͢Δ͠ɺͦΕΛࣗͰ
࡞Δ͜ͱ؆୯
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ͦ͜ͰΓա͗ͳ͍ͨΊʹɺ
ʮϝλʹߟ͑ϕλʹॻ͘ʯ͜
ͱΛ৺͕͚Δ
(͍ͬΆ͏ͰϦϑϨΫγϣϯΛ͍·͘Δ
"࿅श"ͯ͠ΈΔͱͨͷ͍͠Ͱ͢)
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แׅతͳΛࢦ͢ͷ
Ͱͳ͘ɺ࣮ΞϓϦͷػೳ
Λɺগͣͭ͠ҙਂ͘
ϝλʹ͍ͯ͘͠ͷ͕େࣄ
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ͦΕ͕Ͱ͖Δॊೈੑ͕
3VCZͷྑ͞
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“Ruby܅Λ৴པ͢ΔɻRuby܅Λ
ผͷ͋ΔϓϩάϥϚͱͯ͠ѻ͏ɻ
RubyϝλϓϩάϥϛϯάͷΑ͏ͳ
ڧྗͳྗΛ༩͑Δɻͨͩ͠ɺେ͍ͳ
Δྗʹɺେ͍ͳΔ͕͏͜ͱ
ΛΕ͍͚ͯͳ͍ɻͦΕͰɺ
RubyͰͨͷ͍͠ϓϩάϥϛϯάΛɻ
ʮϝλϓϩάϥϛϯάRubyʯ ংจΑΓ
Matz says: