I tried my best to read copious threads on this site regarding the subject of passing hashes. To say the least, this subject has been hashed and rehashed (sorry).

I cannot seem to correctly pass hashes as references. I will need to do this in order to pass more than one hash or a hash along with other parms.

I keep getting errors along the likes of:

Not a CODE reference at ./hashTest.pl line 33.
or:
Can't use string ("me") as a HASH ref while "strict refs" in use ...
The code resembles most of the reference examples on this site. I get the errors on Linux and IRIX. 
#!/usr/bin/perl -w

use strict;

my %hash = (
   's'   => '1',
   'e'   => '200',
   'b'   => '1', 
   'me'  => '0',
   'mf'  => '0',
   'im'  => '/usr/tmp/cache/ccarden/earth/images/earth',
   'pad' => '4',
   'yh'  => '191',
   'yl'  => '0',
   'of'  => 'jpg',
   'x'   => '1024',
   'y'   => '768'
);

sub print_h {
    my %new_hash = @_;

    foreach (keys %new_hash) {
        print "  Key: $_,\t Value: $new_hash{$_}\n";
    }
}

sub print_h_byref {
    my $href = shift;
    my ($value, $key);

    foreach $key (keys %$href) {
        $value = $href->($key);
        print "  Key: $key,\t Value: $value\n";
    }
}

print_h (%hash);
print "\n";
print_h_byref (\%hash);

[download]
I don't know if anyone else will get the errors. Judging by the examples I've seen, I think not. But any elucidation and correction would be much appreciated. Thanks.

In reply to error when passing hash as reference causes by ccarden

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