Just first-post trolling. In little time, there will be better answers, probably using optimization techniques like the famous Schwartzian Transform.

print sort {
    my ($aa) = $a =~ /(\d+)\s*$/;
    my ($bb) = $b =~ /(\d+)\s*$/;
    $bb <=> $aa;

} <DATA>;

__DATA__
 10.47.147.0   Free: 63    In-use: 99    P_InUse: 61
 10.47.147.0   Free: 63    In-use: 99    P_InUse: 65
 10.47.147.0   Free: 63    In-use: 99    P_InUse: 70
 10.47.147.0   Free: 63    In-use: 99    P_InUse: 69
 10.47.147.0   Free: 63    In-use: 99    P_InUse: 63
 10.47.147.0   Free: 63    In-use: 99    P_InUse: 66

[download]

Have fun 

2;0 juerd@ouranos:~$ perl -e'undef christmas'
Segmentation fault
2;139 juerd@ouranos:~$

[download]

In reply to Re: Sorting an array of lines by Juerd
in thread Sorting an array of lines by Quadzilla

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.