I've got several hash of hashes, i.e. : 
$hash{name} = { date => "09-22-00", city=>"Chicago",};

[download]
I want to pass this to a function like this: 
function (\%hash);
function (\%hash1);
function (\%hash2);

sub function 
{
# now I want to use the reference to access the hash I just
# passed, but I'm not sure how. I need to add items to the 
# hash of hashes as well.
# this will flatten the hash, I'd prefer to just know the
# name of the hash I just passed
%hash_reference = @_; for $key (keys %hashreference){
  $hashreference{$key} ={moredata=>"datadatadata"};
}
}

[download]

In reply to how do I use a hash of hashes reference to a function ? by Anonymous Monk

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.