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ReverseArrayIterator.php
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ReverseArrayIterator.php
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<?php
/**
* Convenience class for iterating over an array in reverse order.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @since 1.27
*/
/**
* Convenience class for iterating over an array in reverse order.
*
* @since 1.27
*/
class ReverseArrayIterator implements Iterator, Countable {
/** @var array */
protected $array;
/**
* Creates an iterator which will visit the keys in $array in
* reverse order. If given an object, will visit the properties
* of the object in reverse order. (Note that the default order
* for PHP arrays and objects is declaration/assignment order.)
*
* @phpcs:ignore MediaWiki.Commenting.FunctionComment.ObjectTypeHintParam
* @param array|object $array
*/
public function __construct( $array = [] ) {
if ( is_array( $array ) ) {
$this->array = $array;
} elseif ( is_object( $array ) ) {
$this->array = get_object_vars( $array );
} else {
throw new InvalidArgumentException( __METHOD__ . ' requires an array or object' );
}
$this->rewind();
}
#[\ReturnTypeWillChange]
public function current() {
return current( $this->array );
}
#[\ReturnTypeWillChange]
public function key() {
return key( $this->array );
}
public function next(): void {
prev( $this->array );
}
public function rewind(): void {
end( $this->array );
}
public function valid(): bool {
return key( $this->array ) !== null;
}
public function count(): int {
return count( $this->array );
}
}

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Sat, May 16, 20:22 (1 d, 3 h)
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ReverseArrayIterator.php (2 KB)

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