gistfile1.rb

  def to_json(data = nil)
    format_testfile(data ||= @data)
  end

  private

  # block definitions

  def format_testfile(data)
    format_chunk(nil, data, &method(:format_loan_type))
  end

  def format_loan_type(type, io)
    format_chunk(type, io, &method(:format_scenarios))
  end

  def format_scenarios(type, scenarios)
    format_chunk(type, scenarios, &method(:format_scenario))
  end

  def format_scenario(scenario, tasks)
    format_chunk(scenario, tasks, '[', ']', &method(:format_task))
  end

  def format_task(*task)
    task = Hash[task] # this makes me squicky.
    task.include?(:account) ? format_output_task(task) : format_input_task(task)
  end
  
  #### format_chunk def
  
  def format_chunk(label, enum, open_bracket = '{', close_bracket = '}', &iterator)
    output = ""
    output << (newline + "\"#{label}\": ") unless label.nil?
    output << open_bracket
    aggregated_out = with_indent do
      enum.map { |args| iterator.call(*args) }
    end
    output << aggregated_out.join(",") + newline
    output << close_bracket
  end