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Created September 29, 2017 12:15
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dry3.rb
require 'dry-struct'
module Types
include Dry::Types.module
end
class Bar < Dry::Struct
attribute :countries, Types::Strict::Array.member(
Types::Coercible::String
.constructor { |s| s.to_s.upcase }
.constrained(included_in: ["AT"])
)
end
Bar.new(countries: ["XX"])
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