To clarify  @$c[0] means the same as  @{$c}[0] meaning dereference $c, take array slice

So 

 
$ perl -e " use Data::Dump; my $c = [qw/ a b c/]; dd @$c[1,2]; "
("b", "c")

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While References quick reference lists this item explicitly (item 2), its somewhat documented in perlreftut/perlref but its not recommended

In reply to Re^8: Perl list items by Anonymous Monk
in thread Perl list items by robertw

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