state_info.rb

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

@states[:OH] = 'Ohio'
@states[:NC] = 'North Carolina'
@states[:AK] = 'Alaska'

@cities = {
  FL: ["Miami", "Clearwater", "Boca Raton"],
  NY: ["Brooklyn", "Manhattan", "Albany"],
  CA: ["Freso", "Los Angeles", "Palo Alto", "Berkeley"],
  AK: ["Nome", "Ankorage", "Juneau"],
  OH: ["Columbus"],
  MI: ["Detroit", "Flint"],
  NC: ["Charlotte", "Raleigh", "Asheville"],
  OR: ["Portland", "Eugene", "Salem"]
}

def describe_state(state_code)
  answer = ""
  if state_code.length != 2
    answer = "Your state code is not valid. " 
  elsif @states[state_code].nil?
    answer = "Sorry we don't have any info on that state."
  else
    answer = "#{state_code} is for #{@states[state_code]}. It has #{@cities[state_code].length} #{@cities[state_code].length > 1 ? 'cities' : 'city'}: #{@cities[state_code].join(", ")}."
  end
  answer
end

puts describe_state(:NY)
puts describe_state(:OH)
puts describe_state(:CA)
puts describe_state(:AK)
# Pass state code that doesn't exist
puts describe_state(:XY)
puts "----------------------------------------------------"

@taxes = {
  OR: 7.5,
  FL: 11,
  CA: 11.5,
  NY: 12,
  MI: 9.5,
  OH: 8.75,
  NC: 10,
  AK: 10
}

def calculate_tax(state_code,amount)
  state_code = state_code.to_sym
  if @states[state_code].nil?
    answer = "Sorry we don't have a tax rate for that state."
  else
    tax_rate = @taxes[state_code].to_f
    taxes = amount * (tax_rate / 100)
    dollar_amount = "$" << sprintf('%.2f', taxes)
  end
end

puts calculate_tax(:OR,20)
puts calculate_tax(:FL,33000)
puts calculate_tax(:AK,5000)
# Pass non-symbol
puts calculate_tax("NY",200)
# Pass symbol that doesn't match a state
puts calculate_tax(:DERP,5000)
puts "----------------------------------------------------"

def find_state_for_city(name)
  state_code = "Sorry we couldn't find a state with that city in it."
  @cities.each do |state|
    cities = state[1]
    if cities.include?(name)
      state_code = state[0]
    end
  end
  return state_code
end

puts find_state_for_city("Miami")
puts find_state_for_city("Juneau")
puts find_state_for_city("Flint")
# Pass a city name that doesn't exist.
puts find_state_for_city("Derp")