I don't know what he means by: "$#foo + 1 isn't necessarily equal to @foo"(Some Perl array nuance I am not familiar with)

$[ = 5;
my @foo = qw(a b c);
printf "Number of elements: %d\n", scalar @foo;
printf "Last index: %d\n", $#foo;
printf "*Number of elements: %d\n", $#foo + 1;
printf "*Last index: %d\n", scalar @foo - 1;
[download]

Number of elements: 3
Last index: 7
*Number of elements: 8
*Last index: 2
[download]

One should of course NEVER set $[, but that is besides the point.

Juerd # { site => 'juerd.nl', plp_site => 'plp.juerd.nl', do_not_use => 'spamtrap' }