euler-4-old.rb

   1 num = 1
   2 dem = 1
   3
   4 directions = [:left, :back, :down, :forward]
   5
   6 direction = :left
   7
   8 10.times do
   9   puts "#{num}/#{dem}, dir = #{direction}"
  10   case direction
  11   when :left
  12     num += 1
  13     direction = :back
  14   when :down
  15     dem += 1
  16     direction = :forward
  17   when :back
  18     if num > 1
  19       num -= 1
  20     else
  21       direction = :forward
  22     end
  23     dem += 1
  24   when :forward
  25     if dem > 1
  26       dem -= 1
  27     else
  28       direction = :back
  29     end
  30     num += 1
  31   end
  32 end
  33
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  37