Array permutations

gistfile1.rb

array1 = ['a', 'b', 'c']
array2 = ['d', 'e', 'f']
array3 = ['g', 'h', 'i']

permutations = []

array1.each do |a1|
  array2.each do |a2|
    array3.each do |a3|
      permutations << [a1, a2, a3]
    end
  end
end

permutations.each do |perm|
  print perm
  puts
end