$ perl -le '
> %hash = ( key1 => q{val1}, key2 => q{val2} );
> print qq{Scalar: }, scalar %hash;
> print qq{List: }, %hash;
> print qq{Interpolate: %hash};
> print qq{Interpolate in \@{[...]}: @{ [ %hash ] }};'
Scalar: 2/8
List: key2val2key1val1
Interpolate: %hash
Interpolate in @{[...]}: key2 val2 key1 val1
$