exercise6.rb

puts "How many close friends do you have?"
num_closefriends = gets.chomp.to_i

puts "Please enter the names, ages and favorite colors of your close friends"
friends = []

num_closefriends.times do
  friend = {}
  puts "What is your friend's name?"
  friend[:name] = gets.chomp
  puts "What is their age?"
  friend[:age] = gets.chomp.to_i
  puts "What is their favorite color?"
  friend[:color] = gets.chomp
  friends.push(friend)
end

under18 = []

friends.each do |friend|
  if friend[:age] < 18
    under18.push(friend[:name])
  end
end

puts "you have #{under18.length} friends under 18: #{under18}"

colors = []

friends.each do |friend|
  colors.push(friend[:color])
end

colors = colors.uniq
puts "your friends have #{colors.length} unique favorite colors, they are #{colors}"