Using glob() is the best solution, since it doesn't include . and .. in the solution set. But, in general, if there are things you want to skip over, I find the NEXT statement with conditional modifier is the clearest solution:

foreach ( readdir PRINT ) {
   next if ( ( $_ eq '.' ) or ( $_ eq '..' ) );
# or, alternately ...
   next if /^..?$/;
}

[download]

The first line is explicitly clear and is fast. Regex cannot be faster than straightfoward string comparison, but in this case the small number of characters and the idiomatic nature makes the code clear to undnerstand.

--
TTTATCGGTCGTTATATAGATGTTTGCA

In reply to Re: question regarding slices by TomDLux
in thread question regarding slices by Grygonos

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.