gistfile1.rb

array = %w(dog cat aardvark)
array.each {|animal| puts animal.upcase }
array.map! {|animal| animal.reverse }
array.select {|animal| animal.include? 'a' }
array.sort_by(&:length)
array << 'dog'
array.uniq!

hash = {cat: "meow", dog: "woof", aardvark: "sluuurp"}
hash.keys.join(" and ")
hash.collect {|k, v| "the #{k.to_s} says #{v}"}

class Donkey < Animal
  attr_accessor :name

  def initialize(name)
    @name = name
  end
end

my_donkey = Donkey.new "Ernesto"
my_donkey.name