SplDoublyLinkedList::bottom
(PHP 5 >= 5.3.0)
SplDoublyLinkedList::bottom — Peeks at the node from the beginning of the doubly linked list
说明
参数
此函数没有参数。
返回值
The value of the first node.
错误／异常
Throws RuntimeException when the data-structure is empty.
用户评论:
[#1] tstirrat at gmail dot com [2014-04-27 22:27:10]
A note on top() and bottom():
Picture the doubly-linked list (or queue) in the same way that you would a stack.
Say you started with an empty queue, and added five values:
$myList = new SplDoublyLinkedList
$mylist->push(1)
$mylist->push(2)
$mylist->push(3)
$mylist->push(4)
$mylist->push(5)
$mylist->top()
-> 5
$mylist->bottom()
-> 1
[#2] rakesh dot mishra at gmail dot com [2011-01-26 22:39:01]
<?php
$obj = new SplDoublyLinkedList();
// Check wither linked list is empty
if ($obj->isEmpty())
{
echo "Adding nodes to Linked List<br>";
$obj->push(2);
$obj->push(3);
echo "Adding the node at beginning of doubly linked list <br>";
$obj->unshift(10);
}
echo "<br>Our Linked List:";
print_r($obj);
echo "<br>Pick the node from beginning of doubly linked list";
echo $obj->bottom();
?>