Your first problem is your do { ... }. It is returning 0, because the last thing evaluated is NOT the $ave += $_, but rather the false value returned by for to indicate it's finished. $ave = do { $ave += $_ for @array; $ave } / @array; is a fix, or (if you don't mind lots of divisions): $ave += $_/@array for @array; So no, $ave does NOT have a different value elsewhere in your program -- your array happens to be perfectly distributed, and if you used (1, 1, 2, 3, 5, 8, 13, 21, 34), you'd find you get bizarre different results.

The next problem is you meddling with the array while you loop over it. Don't. Do something like this instead: push @{ $_ < $ave ? \@lower : \@higher }, $_ for @array;

_____________________________________________________
Jeff[japhy]Pinyan: Perl, regex, and perl hacker, who'd like a job (NYC-area)
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;

In reply to Re: Strangness with arrays by japhy
in thread Strangness with arrays by BrowserUk

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.