Ok. Let's get back to basics then :)

When you look things up in a hash, you use a string as the index. So your first example is the same as:

$index = 'connection1_size1';
$$hashRecordPtr{$index};

[download]

Do you follow that? The hash index is just any string value.

But what we've done there is to now use a variable as the hash index. Which means that we can now be a bit cleverer.

$index = "connection1_size$count";
$$hashRecordPtr{$index};

[download]

So now we have a double-quoted string, and we've used the value of the variable $count within the string.

So that effectively does what you want, but we can cut out the unnecessary $index variable and use the double-quoted string directly as the hash index.

$$hashRecordPtr{"connection1_size$count"};

[download]

Is that any clearer?

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

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

In reply to Re^4: Interpolation in a hash key by davorg
in thread Interpolation in a hash key by pickledegg

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.