vendor/gems/rspec-1.3.1/examples/passing/stack.rb


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27pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-leftclass StackUnderflowError < RuntimeError
end

class StackOverflowError < RuntimeError
end

class Stack
  
  def initialize
    @items = []
  end
  
  def push object
    raise StackOverflowError if @items.length == 10
    @items.push object
  end
  
  def pop
    raise StackUnderflowError if @items.empty?
    @items.delete @items.last
  end
  
  def peek
    raise StackUnderflowError if @items.empty?
    @items.last
  end
  
  def empty?
    @items.empty?
  end

  def full?
    @items.length == 10
  end
  
end