Perl doesn't do "hmmm, it walks like a regex, it quacks like a regex, so this thing must be a regex". No, Perl is more like "hey, you use this thing as if it's a regex, so it'll be a regex". Strings, numbers, arrays, hashes, anything can be a regex: 
    $ perl -wle 'print "Yes" if 8 =~ @INC'
    Yes
    $

[download]

It's all in the same line as strings becoming numbers and vica versa, arrays becoming numbers in scalar context, etc. This could lead to bizarre looking code like: 

    $ perl -le 'print "Yes" if %INC =~ %INC'
    Yes
    $

[download]

Abigail

In reply to Re: Walks like a regex, quacks like a regex... by Abigail-II
in thread Walks like a regex, quacks like a regex... by legLess

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.