Towers of Hanoi

hanoi.rb

a = [1,2,3,4]
b = []
c = []
def move_disk(number_of_disks,from,to,via)
  orig_from = Array.new(from)
  orig_to = Array.new(to)
  orig_via = Array.new(via)
  if number_of_disks == 1
  	to.unshift(from.shift)
 	  puts "Moved #{number_of_disks} disks from #{orig_from} to #{orig_to} via #{orig_via}; from is now #{from}; to is now #{to}."
  	return to
  end
  move_disk(number_of_disks-1, from, via, to) # step 1
  move_disk(1, from, to, via) # step 2
  move_disk(number_of_disks-1, via, to, from) # step 3
  puts "Moved #{number_of_disks} disks from #{orig_from} to #{orig_to} via #{orig_via}; from is now #{from}; to is now #{to}."
end
puts move_disk(4, a, c, b)