is it possible you can remove the invalid names before going through the list? for example create a new array with the valid names.. find the number of them and then test the id against the array element in your subroutine:

my @raw_names = ...;
my @valid_names = ();
my $total_valid_names = -1;

foreach my $raw_name(@raw_names){
     next unless $raw_name;
     push(@valid_names,$raw_name);
     $total_names++;
}
for(my $i=0;$i<length(@valid_names);$i++){
     check_name($valid_names[$i],$i);
}

sub check_names{
     my($name,$id) = @_;
     if($id == $total_valid_names){
        say "$name is the last name! ($idth)";
     }
}

[download]

In reply to Re^3: Counting in loop help! by Rudolf
in thread Counting in loop help! by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.