Flow\Helper\ContextIterator::__construct PHP Method

    public function __construct($sequence, $parent)
    {
        if ($sequence instanceof \Traversable) {
            $this->length = $sequence instanceof \Countable ? count($sequence) : iterator_count($sequence);
            $this->sequence = $sequence;
        } elseif (is_array($sequence)) {
            $this->length = count($sequence);
            $this->sequence = new \ArrayIterator($sequence);
        } else {
            $this->length = 0;
            $this->sequence = new \ArrayIterator();
        }
        $this->parent = $parent;
    }