zicht / itertools

use Zicht\Itertools\lib\Interfaces\FiniteIterableInterface;

use Zicht\Itertools\lib\Traits\FiniteIterableTrait;

class DifferenceIterator extends \FilterIterator implements FiniteIterableInterface

{

    use FiniteIterableTrait;

    /** @var \Closure */

    private $func;

    /** @var mixed[] */

    private $excludes;

    /**

     * @param \Iterator $iterable

     * @param \Iterator $excludesIterable

     * @param \Closure $func

     */

    public function __construct(\Iterator $iterable, \Iterator $excludesIterable, \Closure $func)

    {

        $this->func = $func;

        $this->excludes = Itertools\iterable($excludesIterable)->map($this->func)->values();

        parent::__construct($iterable);

    }

    /**

     * {@inheritDoc}

     */

    public function accept()

    {

        return !in_array(

            call_user_func_array($this->func, [$this->current(), $this->key()]),

            $this->excludes

        );

    }

}

use Zicht\Itertools\lib\Interfaces\FiniteIterableInterface;

use Zicht\Itertools\lib\Traits\FiniteIterableTrait;

class IntersectionIterator extends \FilterIterator implements FiniteIterableInterface

{

    use FiniteIterableTrait;

    /** @var \Closure */

    private $func;

    /** @var mixed[] */

    private $includes;

    /**

     * @param \Iterator $iterable

     * @param \Iterator $includesIterator

     * @param \Closure $func

     */

    public function __construct(\Iterator $iterable, \Iterator $includesIterator, \Closure $func)

    {

        $this->func = $func;

        $this->includes = Itertools\iterable($includesIterator)->map($this->func)->values();

        parent::__construct($iterable);

    }

    /**

     * {@inheritDoc}

     */

    public function accept()

    {

        return in_array(

            call_user_func_array($this->func, [$this->current(), $this->key()]),

            $this->includes

        );

    }

}