public function testCount()
{
$list = new DoubleLinkedList();
$this->assertEquals(0, $list->count());
$list->add('value1');
$this->assertEquals(1, $list->count());
$list->add('value2');
$this->assertEquals(2, $list->count());
}
$dll = new DoubleLinkedList();
$dll->add(4);
//echo "valid call " . $dll->valid("current") . "\r\n";
$dll->add(1);
print 'first : ' . $dll->first() . "\r\n";
$dll->add(5);
$dll->add(15);
$dll->add(25);
$dll->add(35);
$dll->add(45);
$dll->add(10);
$dll->add(10);
// don't allow duplicates.
print 'last : ' . $dll->last() . "\r\n";
print 'current : ' . $dll->current() . "\r\n";
print 'Count : ' . $dll->count() . "\r\n";
$node = $dll->firstNode();
while ($node != null) {
print $node->data . "\r\n";
$node = $node->next;
}
$dll->reverse();
// this just allows reverse access to parts of the list.
$dll->reverseList();
print "Reverse the List : \r\n";
$aNode = $dll->firstNode();
while ($aNode != null) {
print $aNode->data . "\r\n";
$aNode = $aNode->next;
}
print '';