RPN calculator

gistfile1.rb

class RPNCalculator
  def initialize
    @calc_array= []
  end
  def push(num)
   @calc_array << num
  end

  def plus
    @calc_array.reverse.each do |number|
      @calc_array.last = number
    end
  end

  def minus
    @value = @calc_array[-2] - @calc_array.last
  end

  def times
    @value = @calc_array[-2] * @calc_array[-1]
  end

  def divide
    @value = @calc_array[-2] * @calc_array[-1]
  end

  def value
    @value = @calc_array.last
  end

end