phpstreams\operations\SortedOperation::getIterator PHP Method

    public function getIterator()
    {
        // Convert the source to an array, for sorting.
        if ($this->source instanceof Traversable) {
            $data = iterator_to_array($this->source);
        } elseif (is_array($this->source)) {
            $data = $this->source;
        } else {
            throw new InvalidStreamException("Cannot handle stream of type " . gettype($this->source));
        }
        if ($this->sort != null) {
            uasort($data, $this->sort);
        } else {
            asort($data);
        }
        return new ArrayIterator($data);
    }