These are the same

push @foo , 1,2,3;
push @foo, @bar;
push @foo, %baz;
[download]

but different from these , which are the same

push @foo , { 1,2,3 };
push @foo, \%baz;
[download]

and different from this one , which is similar to the last two

push @foo, \@bar;
[download]

Do you get it? You push references, otherwise its just a list