SiroDiaz / DataStructures

    private $current;

    private $position;

    public function __construct() {

        $this->head = null;

        $this->tail = &$this->head;

        $this->size = 0;

        $this->position = 0;

        $this->current = &$this->head;

    }

    /**

     * Inserts data in the specified position.

    private $position;

    private $current;

    public function __construct() {

        $this->head = null;

        $this->size = 0;

        $this->position = 0;

        $this->current = &$this->head;

    }

    /**

     * Adds at the end of the list new node containing

    private $position;

    private $current;

    public function __construct() {

        $this->head = null;

        $this->tail = &$this->head;

        $this->size = 0;

        $this->position = 0;

        $this->current = &$this->head;

    }

    /**

     * Removes all nodes of the list. It removes from the beginning.