Not sure what you want:
There are lots of ways to sort this stuff once we agree on the data to be output. Since $rHol is a reference, you need the -> operator to deference the key, normal hash would be just $Hol{$key}, but you need $rHoL->{$key}. Then you need {} around that whole thing to tell the @ operator what to operate upon.

#!/usr/bin/perl -w
use strict;

my $hash_ref= {1002=>[1,2,3,4,5],
               1001=>[6,7,8,9,10],
               3   =>[2]};
               
print_HoL($hash_ref);

sub print_HoL
{
   my $rHoL = shift;
   foreach my $key (keys %$rHoL) 
   {
      print "$key: @{$rHoL->{$key}}\n"; 
   }
}
__END__
Prints:
1001: 6 7 8 9 10
1002: 1 2 3 4 5
3: 2

[download]

In reply to Re: What is happening ? by Marshall
in thread problem using foreach and each with hash ref by vinoth.ree

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.