Andrei Pelinescu-Onciul writes:
No, there are very minor differences:
!defined $fU fastest
ok, please change the syntax.
$fU == "" - extra string conversion
this i don't understand. if i assign $something = "", then $something
is defined and test defined $something should return true.
$fU == $null slowest (has to go through a pv call and
string or integer
conversion)
-- juha