Ok, tonight's trick simply illustrates the principle of replacing the standard '/' separator in substitutions with other characters. It's a simple and well known trick, but can be used pretty effectively in some instances. Here goes: 
$_ = "Sello World\n";

# think about alternative separators
s'S'H's;
print;

# Deparse and compare the difference in the next two
s=>o=>O=>o;
print;

s,o,O,o;
print;

# and now, for the mystery...
sub s { ("x","y","z"); }
s()[0];
print;

[download]
The 'mystery' has nothing to do with mixing separators or that you can use 4 instead of three, that's pretty simple stuff... it's why it replaces anything at all, much less the character it does. Happy obfu-writing!

-- So prophesied the shakespearean monkeys, and so it shall be.

In reply to Re: old obfu tricks revealed by Felonious
in thread old obfu tricks revealed by Felonious

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.