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<?php |
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namespace Wandu\Compiler\Math; |
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use ArrayIterator; |
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use Countable; |
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use IteratorAggregate; |
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class Set implements Countable, IteratorAggregate |
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{ |
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/** @var array */ |
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protected $items; |
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/** |
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* Set constructor. |
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* @param ...$items |
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*/ |
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public function __construct(...$items) |
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{ |
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$this->items = $this->arrayUnique($items); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function count() |
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{ |
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return count($this->items); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getIterator() |
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{ |
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return new ArrayIterator($this->items); |
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} |
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/** |
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* @param mixed $item |
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*/ |
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public function insert($item) |
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{ |
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if (!in_array($item, $this->items, true)) { |
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$this->items[] = $item; |
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} |
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} |
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/** |
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* @param mixed $item |
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* @return bool |
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*/ |
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public function has($item) |
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{ |
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return in_array($item, $this->items, true); |
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} |
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/** |
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* @param \Wandu\Compiler\Math\Set $other |
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* @return \Wandu\Compiler\Math\Set |
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*/ |
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public function ringSum(Set $other) |
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{ |
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if (!in_array(null, $this->items, true)) { |
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return new Set(...$this->items); |
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} |
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$unionSet = $this->arrayUnique(array_merge($this->items, $other->items)); |
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if (in_array(null, $other->items, true)) { |
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return new Set(...$unionSet); |
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} |
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return new Set(...array_filter($unionSet)); |
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} |
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/** |
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* @return array |
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*/ |
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public function toArray() |
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{ |
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return $this->items; |
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} |
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/** |
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* @param \Wandu\Compiler\Math\Set $other |
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* @return bool |
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*/ |
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public function equal(Set $other) |
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{ |
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foreach ($this->items as $item) { |
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if (!in_array($item, $other->items, true)) { |
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return false; |
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} |
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} |
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foreach ($other->items as $item) { |
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if (!in_array($item, $this->items, true)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* @param \Wandu\Compiler\Math\Set $other |
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*/ |
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public function union(Set $other) |
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{ |
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$this->items = $this->arrayUnique(array_merge($this->items, $other->items)); |
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} |
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protected function arrayUnique(array $array) |
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{ |
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$arrayToReturn = []; |
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foreach ($array as $item) { |
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if (!in_array($item, $arrayToReturn, true)) { |
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$arrayToReturn[] = $item; |
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} |
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} |
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return $arrayToReturn; |
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} |
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} |
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Wandu /
Framework
