Post_102.1.rb

class Field
  attr_reader :name,
              :label,
              :validation_strategy,
              :valid_values,
              :value,
              :error

  def initialize(name, label, validation_strategy, valid_values = [])
    @name = name
    @label = label
    @validation_strategy = validation_strategy
    @valid_values = valid_values
  end

  def validate(value)
    @value = value
    @error = validation_strategy.check_for_errors(value)
  end
end