def select_variables
      selection = {}
      puts I18n.t(:ask_variables_message, scope: :negroku)
      get_variables do |var_name|
        selection[var_name] = Ask.input(var_name)
      end
      selection.reject {|key, value| value.empty? }
    end
def select_variables
      selection = {}
      puts I18n.t(:ask_variables_message, scope: :negroku)
      get_variables do |var_name|
        selection[var_name] = Ask.input(var_name)
      end
      selection.reject {|key, value| value.empty? }
    end
Returns a hash of selected variables and values