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<?php |
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|
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namespace Boxzilla; |
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|
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use Iterator; |
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use Countable; |
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|
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class Collection implements Iterator, Countable { |
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|
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protected $elements = array(); |
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private $position = 0; |
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|
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public function __construct( array $elements ) { |
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$this->elements = $elements; |
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$this->position = 0; |
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} |
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|
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function rewind() { |
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$this->position = 0; |
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} |
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|
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function current() { |
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return $this->elements[ $this->position ]; |
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} |
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|
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function key() { |
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return $this->position; |
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} |
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|
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function next() { |
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++$this->position; |
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} |
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|
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function valid() { |
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return isset( $this->elements[ $this->position ] ); |
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} |
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|
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/** |
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* @param $callback |
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* |
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* @return array |
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*/ |
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function map($callback) { |
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$result = array(); |
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|
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foreach( $this->elements as $element ) { |
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$result[] = $callback( $element ); |
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} |
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|
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return $result; |
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} |
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|
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/** |
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* @param $callback |
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* |
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* @return null |
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*/ |
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function find($callback) { |
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|
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foreach( $this->elements as $element ) { |
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if( $callback( $element ) ) { |
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return $element; |
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} |
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} |
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|
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return null; |
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} |
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|
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/** |
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* (PHP 5 >= 5.1.0)<br/> |
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* Count elements of an object |
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* @link http://php.net/manual/en/countable.count.php |
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* @return int The custom count as an integer. |
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* </p> |
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* <p> |
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* The return value is cast to an integer. |
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*/ |
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public function count() { |
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return count( $this->elements ); |
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} |
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} |
