In the interest of balancing clarity and robustness with map, I would suggest the following as an example.
map {
/xlink (.+?) /;
$1 ? $1 : ();
} @xlinks
Of course the trinary operator here is not needed. However, oen problem I have seen with map is accidently clobbering the return values if I am not careful. Therefore if I have a conditional in the return, I try to use a trinary operator at the very end.
BTW, I don't mind putting significant code in a map block. However one does have to be careful about it. I think if the code gets too much, one is better off usually putting the code in a function and calling that rather than going with a for loop.
