Something like this is a bit more generic 
my @list_in_html =
  map_by_index [ sub { "<li>$_</li>" },
    last => sub { qq!<li class="last">$_</li>! }, ], @list;

my @list_in_html =
  map_by_index [ sub { "<li>$_</li>" },
    $#list => sub { qq!<li class="last">$_</li>! }, ], @list;

[download]
where the first sub is the default, and last (or $#list) is applied only for the last element.

Or using List::MapList (which could be optimized) 

my @list_in_html = maplist(
    [
        ( sub { "<li>$_</li>" } ) x ( @list - 1 ),
        sub { qq!<li class="last">$_</li>! },
    ],
    @list
);

[download]

In reply to Re: Variant of map for special-casing the last item by Anonymous Monk
in thread Variant of map for special-casing the last item by jdporter

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