[TYPO3-mvc] update an existing fe_user without editAction

[Sebastian Kurfürst]

Hey,

I think I'd call the Extbase property mapper:

$propertyMapper = t3lib_div::makeInstance('Tx_Extbase_Property_Mapper');
$propertyNamesToMap = array('firstname', 'lastname', ...);
$propertyMapper->map($propertyNamesToMap, $newUser, $existingUser);

Greets,
Sebastian