play.cr

participants = [
  "Bugs Bunny (@bugsbunny)",
  "Duffy Duck (@duffyduck)",
  "Porky Pig (@porkypig)"
]

participants.size

WINNERS_SIZE = 2

raise "Everybody wins! Congrats to \
        #{participants.join(", ")}" if
  WINNERS_SIZE >= participants.size
  
winners = [] of String

WINNERS_SIZE.times do
  winner = participants.sample
  participants.delete winner
  winners << winner
end
  
puts "Thank you all for participating and supporting @CrystalLanguage.
  
Today's #{WINNERS_SIZE} lucky winners are: \n\n#{winners.join("\n")}\n
Please reach us on Twitter so we can send you your stickers!"