Good point. And I just noticed that it doesn't properly treat signs either. Still boring and straightforward, if not quite so trivial:

sub commify {
    my ( $sign, $int, $frac ) = ( $_[0] =~ /^([+-]?)(\d*)(.*)/ );
    my $commified = (
        reverse scalar join ',',
        unpack '(A3)*',
        scalar reverse $int
    );
    return $sign . $commified . $frac;
}

[download]

It should behave exactly like the FAQ code, and some shallow testing seems to confirm that.

Makeshifts last the longest.

In reply to Re^2: Commify numbers, the boring and straightforward way by Aristotle
in thread Commify numbers, the boring and straightforward way by Aristotle

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.