acronomy.rb

sentence1 = "Oh my god"
sentence2 = "What the fcccc"

def acron(sentence)
  result = ""
  sentence.split(" ").each do |word|
    result += word[0].upcase
  end
  return result
end

puts acron(sentence1)
puts acron(sentence2)

game.rb

GAME_OPTIONS = ["pedra", "papel", "scissors"]
# index           0        1         2
# => 1 - 0 =  1 w
# => 2 - 0 =  2 l
# => 2 - 1 =  1 w
# => 1 - 2 = -1 l
# => 0 - 1 = -1 l
# => 0 - 2 = -2 w
#
def logical_game(u_i, c_i)
  puts "User choose #{GAME_OPTIONS[u_i]}"
  puts "Computer choose #{GAME_OPTIONS[c_i]}"
  diff = u_i - c_i
  if diff == 1 || diff == -2
    puts "User win"
  elsif diff == 0
    puts "Draw"
  else
    puts "User lost"
  end
end

puts "pedra, papel ou scissors"
user_choice = gets.chomp

computer_choice = GAME_OPTIONS.sample

u_i = GAME_OPTIONS.index(user_choice)
c_i = GAME_OPTIONS.index(computer_choice)

logical_game(u_i, c_i)