Struct.from_hash: the best of Struct and OpenStruct combined :)

struct.from_hash.rb

class Struct
  def self.from_hash(attributes)
    new(*attributes.keys).new(*attributes.values)
  end
end

user = Struct.from_hash(id: 1, name: "?")
user.id # => 1
user.names # => NoMethodError (undefined method `names' for #<struct id=1, name="?">)