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