Queue implementation in Ruby

gistfile1.txt

class Queue
  def initialize
    @store = []
    @max_size = 5
  end
 
  def enqueue(x)
    raise "Stack is full!" if full?
    @store.push x
  end

  def full?
    return true if @store.length == @max_size
    false
  end
 
  def dequeue
    raise "Stack Underflow - The stack is empty" if self.empty?
    @store.shift
  end
 
  def peek
    @store.first
  end
 
  def empty?
    @store.empty?
  end
end