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<?php
/*
* Copyright (c) Nate Brunette.
* Distributed under the MIT License (http://opensource.org/licenses/MIT)
*/
namespace Tebru\Collection;
use OutOfBoundsException;
/**
* Class AbstractList
*
* A skeletal implementation of the [@see ListInterface]
* @author Nate Brunette <[email protected]>
abstract class AbstractList extends AbstractCollection implements ListInterface
{
* Returns the index of the first instance of the element, -1 if the element
* doesn't exist
* @param mixed $element
* @return int
public function indexOf($element): int
$index = array_search($element, $this->toArray(), true);
return false === $index ? -1 : $index;
}
* Returns the index of the last instance of the element, -1 if the element
public function lastIndexOf($element): int
$elements = array_reverse($this->toArray());
$index = array_search($element, $elements, true);
// return -1 if not found or (size - index found - 1) to return the index of the element after reverse
return false === $index ? -1 : $this->count() - $index - 1;
tebru /
php-collections
