acronymize.rb

def acronymize(sentence)
  acronym = ""
  # .capitalize
  # split
  words = sentence.upcase.split
  # iterate over words
  words.each do |word|
    # get first letter
    acronym += word[0]
  end
  # add letter to variable
  # return the variable
  return acronym
end

p acronymize("what the hell")
puts acronymize("what the hell").class == String
puts acronymize("what the hell") == "WTH"
puts acronymize("oh my god") == "OMG"

game.rb

puts "Welcome to the amazing RPS game!!!"
# Set the valid hands beforehand
valid_hands = ["rock", "paper", "scissors"]

# We're starting the game loop
# Everytime the "end" of the this loop is reached we come back here.
loop do
  # Get and store the computer hand via sample
  pc_hand = valid_hands.sample

  # We interpolate the valid hands in the message to the user.
  puts "Pick a hand: #{valid_hands.join(", ")} (q to quit)"

  # Get and store the user hand
  # FEATURE HINT: we could validate the hand by checking if it's included in
  #               the valid hands array.
  user_hand = gets.chomp

  # Break "jumps" to the end of the loop if triggered. We're only running it
  # if the user says "q" to quit.
  break if user_hand == "q"

  # Some user feedback about the pc hand choice
  puts "PC picked #{pc_hand}"

  # Game state checks
  if user_hand == pc_hand
    puts "It's a draw!"
  elsif (user_hand == "rock"     && pc_hand == "scissors") ||
        (user_hand == "scissors" && pc_hand == "paper")    ||
        (user_hand == "paper"    && pc_hand == "rock")
    puts "It's a win!"
    puts "Congratulations."
  else
    puts "It's a loss!"
  end
end