No! It isn't. 
my @foo = qw[ a b c d e f ];
my $foo_count = @foo;               # $foo_count is 6
my $foo_last  = $foo[$foo_count];   # There is no $foo[6] so undef
my $real_last = $foo[-1];           # Always works

[download]
A lazier way is:
(split(/\//, $bar))[-1]

In reply to Re^2: Regex a URL by tadman
in thread regex a url by andrew

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