map(($_ => 2*$_), @list) map +($_ => 2*$_), @list map { $_ => 2*$_ } @list #### map(($_ => 2*$_), @list) #### map ($_ => 2*$_), @list # XXX #### map(($_ => 2*$_), ()), @list # XXX #### map +($_ => 2*$_), @list