new_hash.rb

def print_out(string)
  STDOUT << string
end

def products
  @products ||= {     827 => {'name' => "ARM",         'price' => 349.99},
    199 => {'name' => "LEG",         'price' => 224.75},
    776 => {'name' => "FIRSTBORN",   'price' => 1499.95},
    222 => {'name' => "LIFESAVINGS", 'price' => 49.99},
    811 => {'name' => "RETIREMENT",  'price' => 49.99}
  }
end

puts
print_out  "1. Add a product
2. Update a product
3. Delete a product
4. View all products
5. View names that start with a letter you choose
6. View highest-priced product and lowest-priced product
7. View sum of all product prices
8. Quit
Choose an option:  "
choice = gets.to_i


def generate_key
  key = rand(998) + 1
  while products.has_key?(key)
    key = rand(998) + 1
  end
  key
end

def add_product
  print_out "Enter a product name:  "
  # $stdout.flush
	name = gets.chomp.upcase
	print_out "Enter the product price using a decimal (as in 44.99), with no dollar sign:  "
	price = gets.chomp.to_f
	key = generate_key
	products[key] = {'name' => "#{name}", 'price' => price}
	puts "You have entered a new product called #{name} with an assigned key of #{key}."
	puts products.inspect.upcase
end

def update_product
	products.each{ |key, product| puts "#{key}  - #{product['name']},    #{product['price']}"  }
	print_out "Enter the key number of the product you wish to update:  "
	keynumber = gets.chomp.to_i
  until products.has_key?(keynumber)
    print_out "This number is not in the list, please try again: "
    keynumber = gets.chomp.to_i
  end

  product = products[keynumber]

	print_out "Enter 9 to change the product name, or 10 to change the price:  "
	entry = gets.chomp.to_i

  until (entry == 9 || entry ==10)
    print_out "This is not one of the choice, please try again: "
    entry = gets.chomp.to_i
  end

	if entry == 9
    print_out "Enter the new product name:  "
    new_name = gets.chomp.upcase
    product['name'] = new_name
		puts product.inspect
	elsif entry == 10
    print_out "Enter the new product price:  "
    new_price = gets.chomp.to_f
    product['price'] = new_price
    puts product.inspect
  else
    print_out "that is not one of the choices"
	end
end



case choice
when 1
	add_product
when 2
  update_product
when 3
  print_out "Enter the name of the product you want to delete:  "
  name = gets.chomp.upcase
  product = products.find{|key, product| product['name'] == name }
  if product.nil?
    print_out "This product is not in the list.\n"
  else
    print_out "we have #{products.length} products\n"
    key = product.first
    products.delete(key)
    print_out "and now, we have #{products.length} products\n"
  end
when 5
  print_out "Type a letter to display all the products starting with that letter:  "
  letter = gets.chomp.upcase
  products.each do |key, value|
    if value['name'].slice(0,1) == letter
      print_out("#{key}  -  #{value['name']},  #{value['price']}\n")
    end
  end
when 6
  flatten_array = products.map do |key, product|
    {'key' => key, 'name' => product['name'], 'price' => product['price']}
  end

  sorted = flatten_array.sort_by{|product| product['price']}
  print_out "cheapest: #{sorted.first}"
  print_out "most expensive: #{sorted.last}"

when 7
  #  sum = products.inject(0) do |sum, product|
  #    sum += product.last['price']
  # end
  sum = 0
  products.each do |key, product|
    sum += product['price']
  end
  print_out sum
else
  print_out "booo, try again"
end