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class Car
  attr_reader :color, :owner, :cylinders

  def initialize(color, owner, cylinders)
    @color = color
    @owner = owner
    @cylinders = cylinders
  end

end

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class Card
  attr_reader :rank, :suit
  def initalize(rank, suit)
    @suit = suit
    @rank = rank
  end
end

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class Whiteboard
  attr_accessor :contents

  def initialize(contents = [])
    @contents = contents
  end

  def erase
    @contents = []
  end

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class Whiteboard
  attr_accessor :contents

  def initialize(contents = [])
    @contents = contents
  end

  def erase
    @contents = []
  end

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class Circle
  def initialize(radius)
    @radius = radius
  end

  def diameter
    2 * @radius
  end

  def circumference

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salutations = [['Mr.', 'Mrs.'], 'Mrs.', ['Mr.', 'Mrs.'], ['Dr.'], 'Ms.']
first_names = ['John', 'Jane', 'Sam', 'Louise', 'Kyle']
last_names = ['Dillinger', 'Cook', 'Livingston', 'Levinger', 'Merlotte']
addresses = ['33 Foolish Lane, Boston, MA 02210',
             '45 Cottage Way, Dartmouth, MA 02342',
             "54 Sally's Court, Bridgewater, MA 02324",
             '4534 Broadway, Boston, MA 02110',
             '4231 Cynthina Drive, Raynham, MA 02767']

mail_list = []

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class Animal
  attr_reader :name

  def initialize(name)
    @name = name
  end

  def eat
    3.times { puts "chomp" }
  end

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select * from tasks where title = "Buy milk";

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#!/usr/bin/env ruby
# run via command line: ./anagrams.rb word
p ARGV[0].chars.to_a.permutation.map(&:join)

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-- What 3 towns have the highest population of citizens that are 65 years and older?
select city, population_over_65_in_2005
from town_health_records
order by population_over_65_in_2005 desc
limit 3;

-- city        population_over_65_in_2005
-- ----------  --------------------------
-- Boston      59950
-- Worcester   23062