After reflecting on perl -le "print $==()=<>", I feel that the keyword "print" detracts from the purity of the concept.

So, how could you do it without any alphanumeric characters at all?

Rules:
• The contents of the argument to -e must not match /\w/. Note that this includes underscores!
• command-line arguments to perl (e.g. the -le) don't count, and neither does the (arbitrary) file name argument.
• If you write it as a file rather than as a -e, the contents of that file must not match /\w/, and the name of that file must be irrelevant to the solution.

Challange:
A line counter program. Those that don't quite work right (e.g. requires the last line to end in a \n to count it) can be exhibited for interest's sake, but should be noted as a partial solution or special case solution, as the case may be.

This may or may not be combined with Golf, as you wish.

—

In reply to !~ /\w/ challenge, anyone? by John M. Dlugosz

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.