You might like using File::ReadBackwards, since it efficiently begins reading chunks from the end of the file, without wasting time starting at the beginning and paging your way through the file until you find the end.

my $bw = File::ReadBackwards->new( 'your.filename' ) 
    or die "can't read 'your.filename'\n$!";

if( 
    defined( my $last_line = $bw->readline )
    and $last_line =~ m/^T/
) {
    # do your processing here...
}

[download]

If it turns out that it's ok to have leading space before the 'T', you would have to modify the regexp to look like this: m/^\s*T/

Another convenient way (though less efficient) is Tie::File, where your file becomes an array. The last line could be accessed as $file[-1].


Dave

In reply to Re: Finding a Letter at Last line by davido
in thread Finding a Letter at Last line by mantra2006

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.