One interesting use that is (as far as I know) unique to Perl, is using the trinary as an Lvalue. That is on the left hand-side of an assignment as in this (rather silly) example. 

#! perl -sw
use strict;

my (@aboveC, @cOrLess);

while (<DATA>) {
    # $1 := name, $2 := grade
    m/^(\w+)\s+([a-f][+-]?)$/i;

    # if the grade is one of these
    0<= index('A+ A A- B+ B B- C+', uc($2), 0 )
        # add name here    if not add name here
        ? $aboveC[@aboveC] : $cOrLess[@cOrLess] = $1;
}

print "Above C   students: @aboveC\n";
print "C or Less students: @cOrLess\n";

__DATA__
homer    f
bart    d-
marge    c+
lisa    a

[download]

which gives 

C:\test>195952
Above C   students: marge lisa
C or Less students: homer bart

C:\test>

[download]
Well It's better than the Abottoire, but Yorkshire!

In reply to Re: Re: variable set to 0 ? 0 : 1 by BrowserUk
in thread variable set to 0 ? 0 : 1 by c

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.