pig_latin.rb

def translate(phrase)
  parts = phrase.split

  final_pigs = []

  parts.each do |word|
    char = word.split(//)

    unless char.at(0).match(/[aeiou]/)
      new_string = char

      until new_string.at(0).match(/[aeio]/)
        new_string << new_string.shift
      end
      final_pigs << new_string.join + "ay"
    else
      final_pigs << word + "ay"
    end
  end
  final_pigs.join(" ")
end

My fork and comments here: https://gist.github.com/jcsalterego/5234470