You should (re-)read perlreftut and perllol while possibly having copies of Data::Dumper output of your samples' contents handy. That being said when you're referencing a single element of an array having a leading @ sigil is a good sign you're doing something wrong.

You're also probably confusing yourself trying to directly compare an array reference in the scalar $table against an actual array @table2. When you initialize my @table2 = [ [7, 8, 9], ... ] what you're actually doing is putting a reference to an anonymous array into the 0th (first) element (i.e. you're setting $table2[0] to point to an arrayref) so that's where your extra level of indexen comes in.

Edit: perldsc might also be useful for more examples. Also tweaked wording.

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re: Multi-Dimensional Arrays and Array References by Fletch
in thread Multi-Dimensional Arrays and Array References by Leudwinus

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.