Yes, that's exactly what I'm saying.

Within your subroutine your have a reference to a hash (in $mp3hash). The way to look up a value in a hash that you only have a reference to is to use $mp3hash->{KEYNAME}. You are using $mp3hash{KEYNAME} (without the dereferencing arrow). The syntax that you are using is trying to look up a value in the hash %mp3hash, but you don't have a hash called %mp3hash, you have a hash reference called $mp3hash. There's an important difference between the two.

And, as I said in my first post on this thread, if you were using use strict in your code then Perl would tell you that you were trying to access an unknown variable.

--
<http://www.dave.org.uk>

"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg


In reply to Re^5: Cannot dereference hash in subroutine.... by davorg
in thread Cannot dereference hash in subroutine.... by bigtiny

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.