#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

use Data::Dumper;
local $Data::Dumper::Deparse = 1;

sub secret {
    'Just Another Perl Hacker,'
}

for my $symbol (keys %main::) {
    my $def = do { no strict;
                   Dumper(${'main::'}{$symbol}) };
    say "$symbol => $def" if $def =~ /sub/;
}

##</code><code>##

#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

use Data::Dumper;
local $Data::Dumper::Deparse = 1;

sub secret {
    'Just Another Perl Hacker,'
}

for my $symbol (keys %main::) {
    my $def = do { no strict;
                   *{"main::$symbol"}{CODE} };
    say "$symbol => ", Dumper $def if $def;
}