Splitting into chunks of no more than an arbitrary length is easy:

use strict;
use warnings;

my $max = 5;
my $str = '123456789012';
$str =~ s/(\S{$max})(?=\S)/$1 /g;
print $str;

[download]

But what if you want to split into equal pieces?

use strict;
use warnings;

my $max = 5;
my $str = '123456789012';
$str =~ s/(\S\S{$max,})/mySplit($1)/eg;
print $str;

sub mySplit {
    my $s = $_[0];
    my ($n, $i, @p, @r);

    ### Calculate number of pieces
    $n = ceil (length($s) / $max);

    ### Calculate length of pieces
    for ($i = 0; $i < length $s; $i++) {
        $p[$i % $n]++;
    }
    ### Get pieces
    for (@p) {
        $s =~ s/(.{$_})//;
        push @r, $1;
    }
    return join ' ', @r;
}

sub ceil {
    return $_[0] == int $_[0] ? $_[0] : int ($_[0] + 1);
}

[download]

In reply to Re: Finding the largest word in a string help! by TJPride
in thread Finding the largest word in a string help! by Anonymous Monk

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.