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andycamp/inheritable_constants.rb

Created August 18, 2012 13:16
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ruby inheritable constants
Raw
inheritable_constants.rb
class A
SUB_TYPES = %w(bass trout salmon)
def valid_sub_type?(sub_type)
self.class::SUB_TYPES.include? sub_type
end
end
class B < A
SUB_TYPES = %w(whale beaver dog)
end
puts A.new.valid_sub_type?('salmon')
puts A.new.valid_sub_type?('tokyo')
puts B.new.valid_sub_type?('beaver')
puts B.new.valid_sub_type?('duck')
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