If you want to get the extension, you can do this:

$ext =~ s/^.+(\.\w+)$/$1/;

That substitutes the whole string with the last dot and what comes after. What behavior do you want with "foo.tar.gz"? The above regex will replace it with ".gz". If you want ".tar.gz", you should use

$ext =~ s/^.+?(\.[\w\.]+)$/$1/;

which searches for as little as possible in front, followed by a dot and one or more alphanumerics or dots. This can cause problems with directories that have dots in them though. If that becomes a problem, you will need to test for "/" in the regex. Hope this helps,

elusion : http://matt.diephouse.com

In reply to Re: Finding a extention by elusion
in thread Finding a extention by andrew

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.