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<?php |
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/* |
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* Copyright (c) Nate Brunette. |
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* Distributed under the MIT License (http://opensource.org/licenses/MIT) |
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*/ |
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namespace Tebru\Collection; |
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use ArrayIterator; |
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/** |
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* Class Bag |
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* |
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* A generic [@see CollectionInterface] backed by an array. |
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* |
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* @author Nate Brunette <[email protected]> |
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*/ |
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class Bag extends AbstractCollection |
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{ |
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/** |
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* The collection elements |
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* |
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* @var array |
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*/ |
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protected $elements = []; |
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/** |
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* Constructor |
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* |
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* @param array $elements |
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*/ |
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public function __construct(array $elements = []) |
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{ |
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$this->elements = array_values($elements); |
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} |
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/** |
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* Ensure the element exists in the collection |
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* |
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* Returns true if the collection can contain duplicates, |
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* and false if it cannot. |
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* |
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* @param mixed $element |
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* @return bool |
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*/ |
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public function add($element): bool |
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{ |
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$this->elements[] = $element; |
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return true; |
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} |
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/** |
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* Removes all elements from a collection |
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* |
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* @return void |
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*/ |
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public function clear() |
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{ |
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$this->elements = []; |
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} |
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/** |
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* Removes object if it exists |
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* |
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* Returns true if the element was removed |
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* |
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* @param mixed $element |
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* @return bool |
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*/ |
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public function remove($element): bool |
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{ |
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$index = array_search($element, $this->elements, true); |
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if (false === $index) { |
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return false; |
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} |
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array_splice($this->elements, $index, 1); |
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return true; |
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} |
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/** |
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* Returns an array of all elements in the collection |
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* |
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* @return array |
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*/ |
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public function toArray(): array |
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{ |
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return $this->elements; |
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} |
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/** |
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* Filter the collection using closure |
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* |
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* The closure will get passed each element. Returning true from the |
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* closure will include that element in the new collection. |
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* |
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* @param callable $filter |
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* @return CollectionInterface |
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*/ |
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public function filter(callable $filter): CollectionInterface |
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{ |
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return new static(array_filter($this->toArray(), $filter)); |
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} |
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/** |
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* Retrieve an external iterator |
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* |
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* @return ArrayIterator |
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*/ |
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public function getIterator(): ArrayIterator |
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{ |
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return new ArrayIterator($this->elements); |
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} |
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} |
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tebru /
php-collections
