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$s = undef;
@a = ();
%h = ();
$ perl -MDevel::Peek -e'
$s = "abc"; Dump $s;
REFCNT = 1
FLAGS = () <-- Var is undefined
PV = 0 <-- undef freed the buffer
Always on Perls where it is no longer experimental
Sometimes, such as when I deem the syntax to be clearer with it than without
Only if the existing code base uses it or a standards doc mandates it
Never heard of it
I'm still supporting 5.6.0, you insensitive clod!
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