This will work: 
#!/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;
   
   while (my ($key, $value) = each %$href) {
       print "  Key: $key,\t Value: $value\n";
   }
}


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

[download]
Which is, I think, close to what somebody else suggested. You can tidy up that sub and also avoid the error you made :)

jdtoronto

In reply to Re: error when passing hash as reference causes by jdtoronto
in thread error when passing hash as reference causes by ccarden

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.