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<?php
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/**
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* This file is part of the O2System Framework package.
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @author Steeve Andrian Salim
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* @copyright Copyright (c) Steeve Andrian Salim
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*/
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// ------------------------------------------------------------------------
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namespace O2System\Spl\DataStructures;
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// ------------------------------------------------------------------------
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use O2System\Spl\Interfaces\SplArrayInterface;
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/**
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* Class SplArrayStack
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*
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* The SplStack class provides the main functionalities of a stack implemented using a doubly linked list and
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* the iterator mode is based on LIFO (Last In First Out).
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*
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* @package O2System\Spl\DataStructures
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*/
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class SplArrayStack extends \SplStack implements SplArrayInterface
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{
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/**
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* SplArrayStack::__construct
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*
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* @param array $stack
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*/
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public function __construct(array $stack = [])
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{
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if (count($stack)) {
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foreach ($stack as $item) {
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$this->push($item);
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}
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}
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}
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// -----------------------------------------------------------------------
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/**
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* SplArrayStack::isEmpty
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*
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* Checks if the array storage is empty.
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*
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* @return bool
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*/
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public function isEmpty()
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{
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return ($this->count() == 0 ? true : false);
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}
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// -----------------------------------------------------------------------
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/**
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* SplArrayStack::has
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*
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* Checks if a value exists in the storage.
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*
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* @param mixed $needle The searched value.
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* @param bool $strict If the third parameter strict is set to TRUE then the in_array() function will also check
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* the types of the needle in the haystack.
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*
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* @return bool
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*/
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public function has($needle, $strict = false)
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{
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return in_array($needle, $this->getArrayCopy(), $strict);
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}
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// -----------------------------------------------------------------------
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/**
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* SplArrayStack::getArrayCopy
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*
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* Creates a copy of the storage.
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*
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* @return array A copy of the storage.
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*/
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public function getArrayCopy()
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{
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$arrayCopy = [];
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for ($this->rewind(); $this->valid(); $this->next()) {
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$arrayCopy[] = $this->current();
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}
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return $arrayCopy;
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}
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} |
o2system /
spl
