First, $#array is the index of the last element in the array. This is never the length of the array itself (unless you've mucked with $[, but don't do that). The best way to get the length of an array is to evaluate it in scalar context.

Second, they haven't defined what the "length" of the two dimensional array is, so it's very difficult to answer the question. Is "length" the length of the longest sub-array? The number of elements in the the main array? The total of all "end level" elements in the array? So maybe your definition of length is what he needs and maybe it isn't.

Incidently, Tye already illustrated the issues with the length concepts in another replay: each of the N different Sub-arrays could have different lengths from each other.

-Ted

In reply to Re: Length of 2-dimensional array by tedv
in thread Length of 2-dimensional array by feloniousMonk

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.