lets_go.rb

require 'pry'

class Deque
  attr_reader :array
  def initialize
    @array = []
  end

  def push(var)
    @array << var
  end

  def pop
    @array.pop
  end

  def shift
    @array.shift
  end

  def unshift(var)
    @array << var
    @array.reverse!
  end
end