ex39.rb

states = {
	'Oregon' => 'OR',
	'Florida' => 'FL',
	'California' => 'CA',
	'New York' => 'NY',
	'Michigan' => 'MI'
}


cities = {
	'CA' => 'San Francisco',
	'MI' => 'Detroit',
	'FL' => 'Jacksonville'
}


cities['NY'] = 'New York'
cities['OR'] = 'Portland'


puts '-' * 10
puts "NY State has: #{cities['NY']}"
puts "OR State has: #{cities['OR']}"


puts '-' * 10
puts "Michigan's abbreviation is: #{states['Michigan']}"
puts "Florida's abbreviation is: #{states['Florida']}"


puts '-' * 10
puts "Michigan has: #{cities[states['Michigan']]}"
puts "Florida has: #{cities[states['Florida']]}"


puts '-' * 10
states.each do |state, abbrev|
	puts "#{state} is abbreviated #{abbrev}"
end


puts '-' * 10
cities.each do |abbrev, city|
	puts "#{abbrev} has the city #{city}"
end


puts '-' * 10
states.each do |state, abbrev|
	city = cities[abbrev]
	puts "#{state} is abbreviated #{abbrev} and has city #{city}"
end

puts '-' * 10

state = states['Texas']

if !state
	puts "Sorry, no Texas."
end


city = cities['TX']
city ||= 'Does Not Exist'
puts "The city for the state 'TX is: #{city}"