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<?php |
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namespace drupol\phpermutations; |
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/** |
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* Class Permutations. |
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* |
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* @package drupol\phpermutations |
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*/ |
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class Permutations implements \Countable { |
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/** |
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* @var mixed |
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*/ |
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protected $dataset; |
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/** |
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* @var int |
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*/ |
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protected $length; |
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/** |
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* Permutations constructor. |
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* |
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* @param array $dataset |
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* @param int $length |
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*/ |
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public function __construct(array $dataset = array(), $length = NULL) { |
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$this->setDataset($dataset); |
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$length = ($length > $this->count()) ? $this->count() : $length; |
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$this->setLength($length); |
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return $this; |
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} |
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/** |
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* @return int |
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*/ |
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public function count() { |
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return count($this->getDataset()); |
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} |
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/** |
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* @param int $length |
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*/ |
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public function setLength($length) { |
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$this->length = $length; |
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} |
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/** |
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* @return int |
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*/ |
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public function getLength() { |
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return (int) $this->length; |
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} |
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/** |
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* @param array $dataset |
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* |
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* @return $this |
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*/ |
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public function setDataset(array $dataset = array()) { |
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$this->dataset = $dataset; |
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return $this; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getDataset() { |
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return $this->dataset; |
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} |
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/** |
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* @return array |
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*/ |
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public function generator() { |
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return $this->permute($this->getDataset(), array()); |
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} |
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/** |
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* @param $items |
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* @param array $perms |
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* |
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* @return array |
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*/ |
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protected function permute($items, $perms = array( )) { |
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$result = array(); |
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foreach (new Combinations($items, $this->getLength()) as $dataset) { |
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if (empty($dataset)) { |
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$return = array($perms); |
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} else { |
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$return = array(); |
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for ($i = count($dataset) - 1; $i >= 0; --$i) { |
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$newitems = $dataset; |
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$newperms = $perms; |
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list($foo) = array_splice($newitems, $i, 1); |
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array_unshift($newperms, $foo); |
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$return = array_merge($return, $this->permute($newitems, $newperms)); |
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} |
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} |
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$result = array_merge($result, $return); |
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} |
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return $result; |
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} |
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/** |
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* @return array |
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*/ |
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public function toArray() { |
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$results = array(); |
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foreach($this->generator() as $value) { |
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$results[] = $value; |
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} |
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return $results; |
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} |
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} |
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drupol /
phpermutations
Loading history...
This check looks for
@paramannotations where the type inferred by our type inference engine differs from the declared type.It makes a suggestion as to what type it considers more descriptive.
Most often this is a case of a parameter that can be null in addition to its declared types.