In Perl $, @ and % tell you what you get out of an expression, not what you are putting in. When you declare an array: my @table; the @ tells you this particular variable ("table") is an array. When you write my $value = $table[1]; the $ on each variable tells you you are dealing with scalar values. The table[1] expression accesses the second element of the array "table" and returns a scalar value - arrays only ever store scalars.

Perl allows you to build complex structures by providing references to things. So an array can be an array of references to arrays - your case. The usual way to do that would be:

my @table = ([1, 2, 3], [4, 5, 6]);

An array of arrays. You can then iterate over all the elements by:

for my $row (@table) { for my $cell (@$row) { printf "%4d", $cell; } print "\n"; }

or, this being Perl you could:

print "@$_\n" for @table;
Optimising for fewest key strokes only makes sense transmitting to Pluto or beyond

In reply to Re: Multi-Dimensional Arrays and Array References by GrandFather
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.