I don't follow why xor is useless, and and isn't. Afterall, if I'm not interested in the result, I can write 
    EXPR1 and EXPR2;

[download]
as 
    if (EXPR1) {EXPR2}

[download]

And something similar for or.

I've used xor, although not very often. A few months ago I used it in a program that took command line arguments. 2 options where multiple exclusive, but at least one of them had to be used. So I had something like: 

    unless (defined ($opt1) xor defined ($opt2)) {
        die "usage message";
    }

[download]

I don't use xor often, but I still use it more than CGI.pm ;-).

Abigail

In reply to Re: logical Exclusive Or, xor by Abigail-II
in thread logical Exclusive Or, xor by fruiture

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.