$ perl -wE '$foo{a}=1; $foo{b}=2; say join",", @foo{qw{a b}}'
1,2
$ perl -wE '$foo{a}=1; $foo{b}=2; say join",", @foo{qw/a b/}'
1,2
$ perl -wE '$foo{a}=1; $foo{b}=2; say join",", @foo{qw(a b)}'
1,2
$ perl -wE '$foo{a}=1; $foo{b}=2; say join",", @foo{qw#a b#}'
Scalar value @foo{qw#a b#} better written as $foo{qw#a b#} at -e line 1.
1,2
$