public function merge($array, $default = true)
{
$newarray = array();
foreach ($array as $key => $value) {
$newKey = is_numeric($key) ? $value : $key;
$newValue = is_numeric($key) ? true : $value;
$newarray[$newKey] = $newValue;
}
$this->_options = array_merge($this->_options, $newarray);
return $this;
}