This...

I realize if I was using an array (rather than an array reference) I could use $#name or scalar( @Name ).

...makes me think you want the number of elements in a reference to an array. You need to convert your arrayref to an array, like so

my $arrayref = [ 1, 2, 3 ];

#step-by-step
my @array = @$arrayref; # derefernce to array, @{ $arrayref } works to
+o
my $num_elements = @array;

#in one step
$num_elements = @$arrayref;

#or, when in list context
print scalar @$arrayref;

#or, if it's the last element number you want
print $#$arrayref;
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