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rightgo09/class_variable_in_singleton_class.rb

Created March 31, 2016 01:45
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class_variable_in_singleton_class.rb
class Hoge
def get_v
@@v ||= 123
end
class << self
def inc_v
@@v ||= 0
@@v += 1
end
end
end
Hoge.new.get_v #=> 123
Hoge.inc_v #=> 124
Hoge.new.get_v #=> 124
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