While I would not recommend it, $a and $b are only special in that they are predeclared and used by sort. Otherwise, you can use them like any other package variable:
sub mysort (&@)
{
my $coderef = shift;
while (@_ > 1)
{
$a = shift;
$b = $_[0];
my $c = $coderef->();
print " $c";
# do sorting
}
print "\n";
}
mysort { $a <=> $b } qw(1 3 2);
But, it is a bad idea to use $a and $b except with sort
But, could use 2 other variables. Just have to declare them.
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