Question

Here is the code to reproduce the problem:

sub hello { return (h => 1, n => 1); }
print join ", ", values hello();

I get the error:

Type of arg 1 to values must be hash
(not subroutine entry) at – line 4,
near “);” Execution of – aborted due
to compilation errors.

I know I can break the call and the print on two lines:

sub hello { return (h => 1, n => 1); }
my %hash = hello();
print join ", ", values %hash;

But I don’t want to do that. Is there some way to do this in one line so that I don’t have to create temporary variables all the time?

Answer 1

I don’t see the usefulness in a real program, but yes, it is possible.

print join ", ", values %{{hello()}};

Explanation: hello() is a list; {hello()} is a hash reference; %{{hello()}} is a hash.