Since my solution works for a zero or more objects, it also works for a single object. 
sub parameter {
   ...
   return NameValTuple->new( name => $name, val => $val );
}

[download]

It's still simpler to return a hash since you don't have to create a new class. 

sub parameter {
   ...
   return map { +{ name => $_, val => $rv{$_} } } keys(%rv);
}

[download]

But you'd have to change 

print $_->name, ': ', $_->val, "\n" for $objA->parameter( 'a.x' );

[download]
to 
print $_->{name}, ': ', $_->{val}, "\n" for $objA->parameter( 'a.x' );

[download]

In reply to Re^3: how to let sub return hash of 2 sub? by ikegami
in thread how to let sub return hash of 2 sub? by toohoo

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