my %hash = map { $_ => "stuff_$_" } qw(asdf qwert zxcv);

##</code><code>##

  my %hash = map { "stuff_$_" => $_ } qw(asdf qwert zxcv);

##</code><code>##

   my %hash = map { {"stuff_$_" => $_} } qw(asdf qwert zxcv);