PHP 더 블 링크 목록(SplDoubly LinkedList)소개 및 사용 인 스 턴 스

SplDoublyLinkedList implements Iterator  , ArrayAccess  , Countable  {
 
  public __construct ( void )
  public void add ( mixed $index , mixed $newval )
  //        
  public mixed top ( void )
  //        
  public mixed bottom ( void )
  //        
  public int count ( void )
  //         
  public bool isEmpty ( void )
 
 
  //      
  public mixed key ( void )
  //      
  public void prev ( void )
  //      
  public void next ( void )
  //    
  public mixed current ( void )
  //          
  public void rewind ( void )
  //           
  public bool valid ( void )
 
  //  index       
  public bool offsetExists ( mixed $index )
  //    index    
  public mixed offsetGet ( mixed $index )
  //    index  
  public void offsetSet ( mixed $index , mixed $newval )
  //    index   
  public void offsetUnset ( mixed $index )
 
  //           
  public mixed pop ( void )
  //           
  public void push ( mixed $value )
 
  //     
  public string serialize ( void )
  //    
  public void unserialize ( string $serialized )
 
  //      
  public void setIteratorMode ( int $mode )
  //      SplDoublyLinkedList::IT_MODE_LIFO (Stack style) SplDoublyLinkedList::IT_MODE_FIFO (Queue style)
  public int getIteratorMode ( void )
 
  //          
  public mixed shift ( void )
  //          
  public void unshift ( mixed $value )
 
}

$list = new SplDoublyLinkedList();
$list->push('a');
$list->push('b');
$list->push('c');
 
$list->unshift('top');
$list->shift();
 
print_r(array(
  'pop' => $list->pop(),
  'count' => $list->count(),
  'isEmpty' => $list->isEmpty(),
  'bottom' => $list->bottom(),
  'top' => $list->top()
));
 
$list->setIteratorMode(SplDoublyLinkedList::IT_MODE_FIFO);
print_r($list->getIteratorMode());
 
for($list->rewind(); $list->valid(); $list->next()) {
  echo $list->current().PHP_EOL;
}
 
print_r($a = $list->serialize());
//print_r($list->unserialize($a));
 
$list->offsetSet(0,'new one');
$list->offsetUnset(0);
print_r(array(
  'offsetExists' => $list->offsetExists(4),
  'offsetGet' => $list->offsetGet(0),
 
));
print_r($list);