results.txt

TypeError: no implicit conversion of Array into String
        from (irb):19:in `new'
        from (irb):19
        from /usr/bin/irb:11:in `<main>'

subarray_struct.rb

class SubarrayStruct < Struct

  # Takes an Array of variables that will be initialized as empty arrays, and a list of normal variables
  def initialize(subarray_names, *variables)
  
    # Turn sublist_names into an Array (if not already) and combine it with variables, send
    # this new Array to Struct.new as a list of arguments
    super *(variables + Array(subarray_names)) do
    
      define_method :initialize do
        # Initializes each variable in sublist_names with an empty array
        Array(subarray_names).each { |s| send "#{s}=", [] }
      end
      
    end
  end
end

Test = SubarrayStruct.new [:array_one, :array_two], :var_three, :var_four

Test.new

working.rb

variables = [:var_three, :var_four]
subarray_names = [:array_one, :array_two]

Test = Struct.new *(variables + Array(subarray_names)) do
  define_method :initialize do 
    Array(subarray_names).each { |s| send "#{s}=", [] }
  end
end

Test.new