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my @array = qw /a b c d e f/;
my $hash;
my $val = 1;
($hash->{pop @array}, $val, $hash) = ($val, $hash, undef) while @array
+;
$hash = $val;

my @array = qw /a b c d e f/;
my $hash = 1;
my $tmp;

($tmp->{pop @array}, $hash, $tmp) = ($hash, $tmp, undef)  while @array
+;