I have a slight preference for omitting variable names if I don't really need them.

If you are concerned about cluttering up a (possibly over-broad) scope with needless nonce variable names (not an entirely unreasonable concern, IMO), why not just enclose the sub-section of code in its own limited sub-scope? 

>perl -wMstrict -le
"{ my %h = qw(a 1  b 2  c 3);
   while (my ($k, $v) = each %h) {
     print qq{$k -> $v};
     }
   }
"
c -> 3
a -> 1
b -> 2

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In reply to Re^3: Iterating over verbatim hash reference by AnomalousMonk
in thread Iterating over verbatim hash reference by rovf

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