/**
* Accessor for the attribute filler before it is applied to the Comparators
* This will compute the union set of attributes using the keys and return an array filled with the filler value specified
* @param string $attributeType vector|scalar
* @param mixed $replaceWith The value to fill the missing attributes with
* @return array
*/
public function getNormalizedAttributeFiller($attributeType, $replaceWith)
{
$filler = array_fill_keys(array_keys(array_diff_key($this->a->getAttributes($attributeType), $this->b->getAttributes($attributeType)) + array_diff_key($this->b->getAttributes($attributeType), $this->a->getAttributes($attributeType))), $replaceWith);
ksort($filler);
return $filler;
}
