This works for me. 
#!/usr/bin/perl -w
use strict;

my @arr = (1..15) ;
my ($offset,$offset1) ;
$offset = $offset1 = int((scalar @arr)/3);

$offset++ if (scalar @arr % 3 > 0) ;
$offset1++  if (scalar @arr % 3 > 1) ;

my ($arr1, $arr2, $arr3) =
([@arr[0..$offset-1]],[@arr[$offset..$offset+$offset1-1]],[@arr[$offse
+t+$offset1..scalar @arr -1]]);

print $_."\n"  for ((@$arr1,("\n"),@$arr2),("\n"),@$arr3);

[download]
A bit lengthy but you can try refactoring it.

In reply to Re: breaking an array into nearly equal parts by Mandrake
in thread breaking an array into nearly equal parts by santonegro

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.