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File Name : OrderedHashMap.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Form\Util;

/**
 * A hash map which keeps track of deletions and additions.
 *
 * Like in associative arrays, elements can be mapped to integer or string keys.
 * Unlike associative arrays, the map keeps track of the order in which keys
 * were added and removed. This order is reflected during iteration.
 *
 * The map supports concurrent modification during iteration. That means that
 * you can insert and remove elements from within a foreach loop and the
 * iterator will reflect those changes accordingly.
 *
 * While elements that are added during the loop are recognized by the iterator,
 * changed elements are not. Otherwise the loop could be infinite if each loop
 * changes the current element:
 *
 *     $map = new OrderedHashMap();
 *     $map[1] = 1;
 *     $map[2] = 2;
 *     $map[3] = 3;
 *
 *     foreach ($map as $index => $value) {
 *         echo "$index: $value\n"
 *         if (1 === $index) {
 *             $map[1] = 4;
 *             $map[] = 5;
 *         }
 *     }
 *
 *     print_r(iterator_to_array($map));
 *
 *     // => 1: 1
 *     //    2: 2
 *     //    3: 3
 *     //    4: 5
 *     //    Array
 *     //    (
 *     //        [1] => 4
 *     //        [2] => 2
 *     //        [3] => 3
 *     //        [4] => 5
 *     //    )
 *
 * The map also supports multiple parallel iterators. That means that you can
 * nest foreach loops without affecting each other's iteration:
 *
 *     foreach ($map as $index => $value) {
 *         foreach ($map as $index2 => $value2) {
 *             // ...
 *         }
 *     }
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 *
 * @since 2.2.6
 */
class OrderedHashMap implements \ArrayAccess, \IteratorAggregate, \Countable
{
    /**
     * The elements of the map, indexed by their keys.
     *
     * @var array
     */
    private $elements = array();

/**
     * The keys of the map in the order in which they were inserted or changed.
     *
     * @var array
     */
    private $orderedKeys = array();

/**
     * References to the cursors of all open iterators.
     *
     * @var array
     */
    private $managedCursors = array();

/**
     * Creates a new map.
     *
     * @param array $elements The elements to insert initially.
     *
     * @since 2.2.6
     */
    public function __construct(array $elements = array())
    {
        $this->elements = $elements;
        $this->orderedKeys = array_keys($elements);
    }

/**
     * {@inheritdoc}
     *
     * @since 2.2.6
     */
    public function offsetExists($key)
    {
        return isset($this->elements[$key]);
    }

/**
     * {@inheritdoc}
     *
     * @since 2.2.6
     */
    public function offsetGet($key)
    {
        if (!isset($this->elements[$key])) {
            throw new \OutOfBoundsException('The offset "' . $key . '" does not exist.');
        }

return $this->elements[$key];
    }

/**
     * {@inheritdoc}
     *
     * @since 2.2.6
     */
    public function offsetSet($key, $value)
    {
        if (null === $key || !isset($this->elements[$key])) {
            if (null === $key) {
                $key = array() === $this->orderedKeys
                    // If the array is empty, use 0 as key
                    ? 0
                    // Imitate PHP's behavior of generating a key that equals
                    // the highest existing integer key + 1
                    : max($this->orderedKeys) + 1;
            }

$this->orderedKeys[] = $key;
        }

$this->elements[$key] = $value;
    }

/**
     * {@inheritdoc}
     *
     * @since 2.2.6
     */
    public function offsetUnset($key)
    {
        if (false !== ($position = array_search($key, $this->orderedKeys))) {
            array_splice($this->orderedKeys, $position, 1);
            unset($this->elements[$key]);

foreach ($this->managedCursors as $i => $cursor) {
                if ($cursor >= $position) {
                    --$this->managedCursors[$i];
                }
            }
        }
    }

/**
     * {@inheritdoc}
     *
     * @since 2.2.6
     */
    public function getIterator()
    {
        return new OrderedHashMapIterator($this->elements, $this->orderedKeys, $this->managedCursors);
    }

/**
     * {@inheritdoc}
     *
     * @since 2.2.6
     */
    public function count()
    {
        return count($this->elements);
    }
}

System Information
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File : BlackDragon /templates/index.php

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2024-03-03 10:54:39
..	dir	-	root/root	0755	2024-03-03 10:54:39
FormUtil.php	text/x-php	1.04 KB	root/root	0644	2019-12-18 11:24:06
InheritDataAwareIterator.php	text/x-php	748 B	root/root	0644	2019-12-18 11:24:06
OrderedHashMap.php	text/x-php	4.55 KB	root/root	0644	2019-12-18 11:24:06
OrderedHashMapIterator.php	text/x-php	3.54 KB	root/root	0644	2019-12-18 11:24:06
VirtualFormAwareIterator.php	text/x-php	1.05 KB	root/root	0644	2019-12-18 11:24:06