tweet shortener week 1 day 4

tweet_shortener.rb

def shorten_tweet(tweet)
  return tweet if tweet.length < 140
  tweet = tweet.split(" ")
  out = []
  tweet.each do |word|
    case word
    when "to", "two", "too" 
      out << '2'
    when "for", "four" 
      out << '4'
    when "be"
      out << "b"
    when "you"
      out << "u"
    when "at"
      out << "@"
    when "and"
      out << "&"
    else
      out << word
    end
  end
  out = out.join(" ")
  if out.length > 140
    out = out[0..140]
  end
  out
end