http://patshaughnessy.net/2014/4/8/using-a-ruby-class-to-write-functional-code

line.rb

class Line

  attr_reader :line

  def initialize(text)
    @line = text
  end
  
  def office
    values[2].strip
  end
  
  def employee_id
    values[1].strip
  end
  
  def last_name
    name = values[0]
    name.split[0]
  end
  
  private
  
    def values
      @values ||= lines.split(',')
    end

end