title: Objective C NSStack and NSQueue?
body: <p>In Java there is a nice library class java.util.Stack which implements push and pop methods. 
  Is there anything similar in Objective C?</p>
  
  <p>I found only MutableArray. Seems weird I'd have to implement such a basic thing as a stack, there must be something like "NSStack", "NSQueue" and other similar stuff.</p>