tsnow · July 21, 2013 13:46
diff --git a/praxis_puzzle.rb b/praxis_puzzle.rb
 def f(n)
  @q ||= []
  [email protected](n)
  puts [@q,v,n].inspect
  return -n if v
  @q.push(n)
  n 
 end

 =begin
 1.9.3p393 :053 > f(f(-1))
 [[], nil, -1]
 [[], -1, -1]
 => 1 
 1.9.3p393 :054 > f(f(2))
 [[], nil, 2]
 [[], 2, 2]
 => -2
 =end
	def f(n)
	@q \|\|= []
	[email protected](n)
	puts [@q,v,n].inspect
	return -n if v
	@q.push(n)
	n
	end

	=begin
	1.9.3p393 :053 > f(f(-1))
	[[], nil, -1]
	[[], -1, -1]
	=> 1
	1.9.3p393 :054 > f(f(2))
	[[], nil, 2]
	[[], 2, 2]
	=> -2
	=end