Stoopid Ruby trick <g>

trinary.rb

class Trinary
  class << self
    def ~  ; ~new ; end
    def -@ ; -new ; end
    def +@ ; +new ; end
  end

  def initialize(digits=[])
    @digits = digits
  end

  def ~  ; self.class.new(@digits.dup.unshift(0)) ; end
  def -@ ; self.class.new(@digits.dup.unshift(1)) ; end
  def +@ ; self.class.new(@digits.dup.unshift(2)) ; end

  def to_i
    @digits.inject{ |v,d| v * 3 + d }
  end
end

t = ~Trinary
puts t.to_i
# => 0

t = -Trinary
puts t.to_i
# # => 1

t = +Trinary
puts t.to_i
# # => 2

t = -~++Trinary
puts t.to_i
# # => 35