$_=0;
Shouldn't this be
local $_ = 0;
to avoid global variable side effects (see local)?
$_=0;
$x < $y && $_--;
$x > $y && $_++;
$_;
And how does this code differ in effect from
$x <=> $y;
(see <=>
in Equality Operators
in perlop)?
(And a small point, but , (comma) is used as the delimiter in the
OPed example data instead of : (colon), which you
use in the s/:.+// extraction substitutions.)
Give a man a fish: <%-{-{-{-<
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