thinkbot.rb

puts "Hi there, what can I do for you?"

while true do
  print ">> "

  input = gets.chomp.split
  command = input[0]
  args = input[1..input.length]

  case command
  when 'greet'
    name = args[0]
    puts "Hello, #{name}"
  when 'time'
    puts "The time is #{Time.now}"
  when 'add'
    output = args.inject(0) do |memo, n|
      memo += n.to_i
      memo
    end
    puts "The solution to #{args.join(' + ')} is #{output}"
    puts "That was easy."
  when 'order'
    output = args.shuffle
    puts output.join(', ')
  when 'say'
    puts "Bleep bloop bleep #{args.join(' ')}"
  when 'quit'
    puts "See ya!"
    break
  else
    output = "Don't know how to #{command}"
    if args
      output += " with #{args.join(', ')}"
    end
    puts output + ":("
    puts "I only do 'greet', 'add', 'order', 'time', 'say', 'quit'"
  end
end