/**
* Check if current position is valid.
*
* @return bool
*/
public function valid()
{
$valid = $this->_iterator->valid();
if (true === $valid) {
return true;
}
if (null !== $this->_body) {
$handle =& $this->_body;
$handle($this->_i);
}
$this->rewind();
if ($this->_n <= $this->_i++) {
$this->_i = 1;
return false;
}
return true;
}
public static function findMinMax(\Traversable $it, callback $extractor = null)
{
if ($extractor === null) {
$extractor = function ($value) {
return $value;
};
}
$min = $max = $extractor($it->current());
$it->next();
$value = $extractor($it->current());
while ($it->valid()) {
if ($value > $max) {
$max = $value;
} elseif ($value < $min) {
$min = $value;
}
$it->next();
$value = $it->current();
}
return array($min, $max);
}
/**
* Check if current position is valid.
*
* @return bool
*/
public function valid()
{
return $this->_iterator->valid();
}
/**
* @see Iterator::valid()
* @return bool
*/
public function valid()
{
if ($this->iter instanceof Iterator) {
return $this->iter->valid();
} elseif (is_array($this->iter)) {
return current($this->iter) !== false;
// no paths can have this value
}
return false;
// some failure?
}
/**
* Implentation of the Iterator SPL class for Valid(),
* Checks if the current item is a valid item for processing
* NULL keys represent an invalid item
*
* @access public
*/
public function valid()
{
return $this->datasource->valid();
}
/**
* Returns whether the current iterator offset is valid
*
* @return Boolean
*/
function valid()
{
return isset($this->offset) && $this->inner->valid();
}
public function valid()
{
return $this->input->valid();
}
