Be very, very careful. You are coming close to the following snippet that I use as an interview question. Suppose that CSV is an open filehandle to a file with comma separated values. You want to extract this into an array of arrays. So you write the following snippet: 
while (<CSV>) {
  chomp($_);
  @row = split /,/, $_, -1;
  push @data, \@row;
}

[download]
and you get a list of copies of the last row. Why is it going wrong, and how would you fix?

When I ask this I am willing to answer any and all questions about syntax, what constructs do, etc. I stand willing to say what the output will be as they make various modifications to the code. The point isn't familiarity with Perl, it is whether you understand how references work.

Perhaps not surprisingly, I find that people coming from a C background (where you use pointers a lot) tend to do better on this than people who started by learning Perl for scripting/CGI/etc.

In reply to Re (tilly) 2: Dynamic array names by tilly
in thread Dynamic array names by CiceroLove

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.