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  1. use strict;
  2. use warnings;
  3.  
  4. sub get_undef {
  5.     my $undef = undef;
  6.     # force scalar context
  7.     return $undef;
  8. }
  9.  
  10. my %hash = (
  11.     &get_undef => 'sad but true',
  12.     'true'  => '0 but true',
  13. );
  14.  
  15. use Data::Dumper;
  16. print 'Results ' . Dumper(\%hash);
Success #stdin #stdout 0.02s 5104KB
comments (?)
stdin 
Standard input is empty
stdout 
Results $VAR1 = {
          '' => 'sad but true',
          'true' => '0 but true'
        };
https://ideone.com/BJNWBf
language:
Perl (perl 5.28.1)
created:
11 years ago
visibility:
public

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