Better version of "iterate over Seq or if empty" in scala?

Is there a shorter/better way to do the following :

mySeq.map { elmt => 
    // do stuff
}   

if (mySeq.isEmpty) {
    // some other stuff
}

Ps : I'm using PlayFramework and this is meant to be used in templates, so if there are any "helpers" there I missed, I would be glad to discover those ;)