Package	system.data.queues
Class	public class PriorityQueue
Inheritance	PriorityQueue LinearQueue ArrayCollection Object
Implements	Sortable

This queue orders elements according to an order specified at construction time, which is specified either according to their natural order or according to a IComparator object.

Example :

     import system.data.queues.PriorityQueue ;
     import system.comparators.AlphaComparator ;
     import system.comparators.NumberComparator ;
     
     var init:Array = [5, 4, 3, 2, 1] ;
     var q:PriorityQueue = new PriorityQueue( init , new NumberComparator() , Array.NUMERIC  )  ;
     
     trace ("queue size : " + q.size()) ;
     trace("queue " + q) ;
     
     q.options = Array.NUMERIC + Array.DESCENDING ;
     trace("queue " + q) ;
     
     q.clear() ;
     
     q.comparator = new AlphaComparator() ;
     q.options    = Array.CASEINSENSITIVE | Array.DESCENDING ;
     
     trace ("enqueue item4 : " + q.enqueue ("item4")) ;
     trace ("enqueue item2 : " + q.enqueue ("item2")) ;
     trace ("enqueue item3 : " + q.enqueue ("item3")) ;
     trace ("enqueue item1 : " + q.enqueue ("item1")) ;
     
     trace("queue " + q) ;
     
     q.options = Array.CASEINSENSITIVE ;
     trace("queue " + q) ;
     

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