Hi again, monks!

I'm having a heck of a time trying to sort a hash. Here are the details:

First off, for reasons uncontrollable by me, I'm being provided a hash containing the contents of /etc/passwd in the following format:

$etcpw = {
    'blah' => 'blah:x:3:1:blah:/home/blah:/sbin/nologin',
    'tra'  => 'tra:x:1:1:tra:/home/tra:/sbin/nologin',
    'la'   => 'la:x:2:1:la:/home/la:/sbin/nologin'
};

[download]

My objective is to sort it based on UID, but the following (my best attempt) doesn't quite seem to work:

map {
    print "$etcpw->{$_}\n";
} sort { ($etcpw->{$a} =~ /:(\d+)/) <=> ($etcpw->{$b} =~ /:(\d+)/) } k
+eys %{$etcpw};

[download]

I imagine it's probably pretty obvious, but I'm banging my head against the monitor trying to figure it out. Can someone tell me where I'm going wrong?

Thanks,
-s.

In reply to Hash sorting (by value) woes by sschneid

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.