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Arrays of Animals

From Exercise 34 of Learn Ruby the Hard Way.  I am sure this could be done a lot more elegantly, but I'm satisfied with what I got from this, and I know it works too.
# everything pertaining to the quiz is contained in the function below

def quiz

  # clear the screen
  puts "\e[H\e[2J"

  # gem for colorising text, very cool stuff
  require 'colorize'

  # the array of animals
  animals = ['bear', 'ruby', 'peacock', 'kangaroo', 'whale', 'platypus']

  # display the list of animals, it's not a memory test
  puts "These are the animals in our array: #{animals}"

  # preparing the ordinal and cardinal arrays for the quiz
  ordinal = ["first", "second", "third", "fourth", "fifth", "sixth"]
  cardinal = [0, 1, 2, 3, 4, 5]

  # generic question for choosing the ordinal position
  chooseOrdinal = """
  What is the ordinal position of this animal?
  first
  second
  third
  fourth
  fifth
  sixth


  """

  # generic question for choosing the cardinal position
  chooseCardinal = """
  What is the cardinal position of this animal?
  0
  1
  2
  3
  4
  5


  """

  puts """
  Type the name of an animal:
  - bear
  - ruby
  - peacock
  - kangaroo
  - whale
  - platypus

  """
  print "> "

  userSelection = $stdin.gets.chomp.downcase
  case userSelection
  when "#{animals[0]}"
    puts "You chose a #{userSelection}.\n"
    puts chooseOrdinal
    answerOrdinal = $stdin.gets.chomp.downcase
    if answerOrdinal == "#{ordinal[0]}"
      puts "Correct!\n".colorize(:green)
      puts chooseCardinal
    print "> "
      answerCardinal = $stdin.gets.chomp
      if answerCardinal == "#{cardinal[0]}"
        puts "Correct!\n".colorize(:green)
      else
        puts "Incorrect cardinal number!".colorize(:red)
      end
    else
      puts "Incorrect ordinal number!".colorize(:red)
    end
  when "#{animals[1]}"
    puts "You chose a #{userSelection}."
    puts chooseOrdinal
    answerOrdinal = $stdin.gets.chomp.downcase
    if answerOrdinal == "#{ordinal[1]}"
      puts "Correct!\n".colorize(:green)
      puts chooseCardinal
    print "> "
      answerCardinal = $stdin.gets.chomp
      if answerCardinal == "#{cardinal[1]}"
        puts "Correct!".colorize(:green)
      else
        puts "Incorrect cardinal number!".colorize(:red)
      end
    else
      puts "Incorrect ordinal number!"
    end
  when "#{animals[2]}"
    puts "You chose a #{userSelection}."
    puts chooseOrdinal
    answerOrdinal = $stdin.gets.chomp.downcase
    if answerOrdinal == "#{ordinal[2]}"
      puts "Correct!\n".colorize(:green)
      puts chooseCardinal
    print "> "
      answerCardinal = $stdin.gets.chomp
      if answerCardinal == "#{cardinal[2]}"
        puts "Correct!".colorize(:green)
      else
        puts "Incorrect cardinal number!".colorize(:red)
      end
    else
      puts "Incorrect ordinal number!"
    end
  when "#{animals[3]}"
    puts "You chose a #{userSelection}."
    puts chooseOrdinal
    answerOrdinal = $stdin.gets.chomp.downcase
    if answerOrdinal == "#{ordinal[3]}"
      puts "Correct!\n".colorize(:green)
      puts chooseCardinal
    print "> "
      answerCardinal = $stdin.gets.chomp
      if answerCardinal == "#{cardinal[3]}"
        puts "Correct!".colorize(:green)
      else
        puts "Incorrect cardinal number!".colorize(:red)
      end
    else
      puts "Incorrect ordinal number!"
    end
  when "#{animals[4]}"
    puts "You chose a #{userSelection}."
    puts chooseOrdinal
    answerOrdinal = $stdin.gets.chomp.downcase
    if answerOrdinal == "#{ordinal[4]}"
      puts "Correct!\n".colorize(:green)
      puts chooseCardinal
    print "> "
      answerCardinal = $stdin.gets.chomp
      if answerCardinal == "#{cardinal[4]}"
        puts "Correct!".colorize(:green)
      else
        puts "Incorrect cardinal number!".colorize(:red)
      end
    else
      puts "Incorrect ordinal number!"
    end
  when "#{animals[5]}"
    puts "You chose a #{userSelection}."
    puts chooseOrdinal
    answerOrdinal = $stdin.gets.chomp.downcase
    if answerOrdinal == "#{ordinal[5]}"
      puts "Correct!\n".colorize(:green)
      puts chooseCardinal
    print "> "
      answerCardinal = $stdin.gets.chomp
      if answerCardinal == "#{cardinal[5]}"
        puts "Correct!".colorize(:green)
      else
        puts "Incorrect cardinal number!".colorize(:red)
      end
    else
      puts "Incorrect ordinal number!".colorize(:red)
    end
  else
    puts "I know no such animal."
  end

end

quiz()

Update (2020-02-24)

I lightly refactored the code.

# gem for colorising text, very cool stuff
require 'colorize'

def animals
  ['bear', 'ruby', 'peacock', 'kangaroo', 'whale', 'platypus']
end

def cardinal
  (0... animals.length).to_a
end

def ordinal
  # TODO: Find a gem that converts integers into ordinal numbers
  ["first", "second", "third", "fourth", "fifth", "sixth"]
end

def selection_prompt(str_ary)
  str_ary.each { |str| puts "- #{str}" }
  puts ""
  print "> "
end

def animal_selection_prompt
  puts "These are the animals in our array: #{animals}"
  puts "Type the name of an animal:\n"
  selection_prompt(animals)
end

def cardinal_selection_prompt
  puts "What is the cardinal position of this animal?"
  selection_prompt(cardinal)
end

def ordinal_selection_prompt
  puts "What is the ordinal position of this animal?"
  selection_prompt(ordinal)
end

def select_animal(animal_input_str)
  animal_name_str = animal_input_str
  animal_index_int = animals.index(animal_name_str)
  animal_position_str = ordinal[animal_index_int]

  {
    animal_name: animal_name_str,
    animal_index: animal_index_int,
    animal_position: animal_position_str
  }
end

def select_cardinal(int, selection_hsh)
  puts "You chose a #{selection_hsh[:animal_name]}.\n"
  if int == selection_hsh[:animal_index]
    puts "Correct!\n".colorize(:green)
  else
    puts "Incorrect cardinal number!".colorize(:red)
  end
end

def select_ordinal(str, selection_hsh)
  if str.eql?(selection_hsh[:animal_position])
    puts "Correct!\n".colorize(:green)
  else
    puts "Incorrect ordinal number!".colorize(:red)
  end
end

def quiz
  # clear the screen
  puts "\e[H\e[2J"

  animal_selection_prompt
  user_selection = $stdin.gets.chomp.downcase
  selection_hsh = select_animal(user_selection)
  puts "You chose a #{selection_hsh[:animal_name]}.\n"

  cardinal_selection_prompt
  animal_index_int = $stdin.gets.chomp.to_i
  select_cardinal(animal_index_int, selection_hsh)

  ordinal_selection_prompt
  animal_position_str = $stdin.gets.chomp.downcase
  select_ordinal(animal_position_str, selection_hsh)
end

quiz()


ruby code study
Published on 08 Dec 2016 by Alexander Garber

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