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📁 ..	-	2025-05-25 12:37
📄 double_link_example.php <?php require 'Structures/LinkedList/Double.php'; /* To do anything useful with a linked list, you need to * extend the Node class to hold data associated with the * node. In this case, we're just going to hold a single * integer in the $_my_number property. / class LinkNodeTester extends Structures_LinkedList_DoubleNode { protected $_my_number; protected $_my_letter; function __construct($number, $letter) { $this->_my_number = $number; $this->_my_letter = $letter; } function getNumber() { return $this->_my_number; } function getLetter() { return $this->_my_letter; } function setNumb($number) { $this->_my_number = $number; } function __toString() { return "{$this->getNumber()}"; } } / To enable key=>value iteration, we must override the default key() * method in Structures_LinkedList_Double to return a meaningful value / class LinkListTester extends Structures_LinkedList_Double { function key() { return $this->current()->getLetter(); } } / Now we'll create some instances of the new class / $node1 = new LinkNodeTester(1, 'a'); $node2 = new LinkNodeTester(2, 'b'); $node3 = new LinkNodeTester(3, 'c'); $node4 = new LinkNodeTester(4, 'd'); $node5 = new LinkNodeTester(5, 'e'); / Start by instantiating a list object. * You can either pass the first node to the constructor, * or leave it null and add nodes later. / $list = new LinkListTester($node1); // 1 / appendNode() adds a node to the end of the list / $list->appendNode($node2); // 1-2 / prependNode() adds a node to the start of the list / $list->prependNode($node3); // 3-1-2 / insertNode($new_node, $reference_node, $before) adds a node * before the reference node if the third parameter is true, * or after the reference node if the third parameter is false / $list->insertNode($node4, $node1); // 3-1-4-2 $list->insertNode($node5, $node1, true); // 3-5-1-4-2 / current() returns the current pointer node in the list / $link = $list->current(); print $link->getNumber(); // "1" / rewind() resets the pointer to the root node of the list / $link = $list->rewind(); print $link->getNumber(); // "3" // iterate through the list with do...while() do { print $link->getNumber(); } while ($link = $list->next()); // "35142" / You can also iterate through a list with foreach() / foreach ($list as $bull) { print $bull->getNumber(); } // 3-1-4-2 / Override the key() method to enable $key=>$value iteration / foreach ($list as $key=>$value) { print "$key => $value\n"; } / end() resets the pointer to the last node of the list / $link = $list->end(); print $link->getNumber(); // "2" / You can iterate backwards through a list with previous() */ do { print $link->getNumber(); } while ($link = $list->previous()); // "24153" ?>	2.87 KB	2022-12-27 09:40
📄 single_link_example.php <?php require 'Structures/LinkedList/Single.php'; /* To do anything useful with a linked list, you need to * extend the Node class to hold data associated with the * node. In this case, we're just going to hold a single * integer in the $_my_number property. / class LinkNodeTester extends Structures_LinkedList_SingleNode { protected $_my_number; protected $_my_letter; function __construct($num, $letter) { $this->_my_number = $num; $this->_my_letter = $letter; } function getNumber() { return $this->_my_number; } function getLetter() { return $this->_my_letter; } function setNumb($numb) { $this->_my_number = $numb; } function __toString() { return "{$this->getNumber()}"; } } / To enable key=>value iteration, we must override the default key() * method in Structures_LinkedList_Single to return a meaningful value / class LinkListTester extends Structures_LinkedList_Single { function key() { return $this->current()->getLetter(); } } / Now we'll create some instances of the new class / $node1 = new LinkNodeTester(1, 'a'); $node2 = new LinkNodeTester(2, 'b'); $node3 = new LinkNodeTester(3, 'c'); $node4 = new LinkNodeTester(4, 'd'); $node5 = new LinkNodeTester(5, 'e'); / Start by instantiating a list object. * You can either pass the first node to the constructor, * or leave it null and add nodes later. / $list = new LinkListTester($node1); // 1 / appendNode() adds a node to the end of the list / $list->appendNode($node2); // 1-2 / prependNode() adds a node to the start of the list / $list->prependNode($node3); // 3-1-2 / insertNode($new_node, $reference_node, $before) adds a node * before the reference node if the third parameter is true, * or after the reference node if the third parameter is false / $list->insertNode($node4, $node2, true); // 3-1-4-2 / current() returns the current pointer node in the list / $link = $list->current(); // 1 / You can iterate through a list with the next() method / do { print $link->getNumber(); } while ($link = $list->next()); // 1-4-2 / rewind() resets the pointer to the root node of the list / $link = $list->rewind(); // 3 / You can also iterate through a list with foreach() / foreach ($list as $bull) { print $bull->getNumber(); } // 3-1-4-2 / Override the key() method to enable $key=>$value iteration / foreach ($list as $key=>$value) { print "$key => $value\n"; } / end() resets the pointer to the last node of the list / $link = $list->end(); // 2 / You can iterate backwards through a list with previous() */ do { print $link->getNumber(); } while ($link = $list->previous()); // 2-4-1-3 ?>	2.68 KB	2022-12-27 09:40

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