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okuramasafumi/included.rb

Created April 17, 2023 13:27
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Tell me if this module is included by the same class more than once
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included.rb
def self.included(base)
base.instance_variable_set(:@count, 0) unless base.instance_variable_defined?(:@count)
base.instance_variable_set(:@count, base.instance_variable_get(:@count) + 1)
puts base.name if base.instance_variable_get(:@count) > 1
end
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