after reading the perldoc for Tie::File it sounded like a good idea™ ... but it's not behaving per docs.

I'm trying: 

tie my @array, 'Tie::File', $filename, mode => O_RDONLY;
my $recs = @array;
warn "we have $recs records to parse ";
pop @array;

foreach my $element ( @array ) {
   print "ok, we'd be updating $element \n";
}

[download]
the  tie statement is straight out of the perldoc.

i need to skip the first line during processing since it's a "header" line.

the error that comes back is: 

we have 280579 records to parse  at ./upd_res_data2.pl line 72, <FH> l
+ine 280579.
Couldn't write record: Bad file descriptor at /usr/lib/perl5/5.8.0/Tie
+/File.pm line 665, <FH> line 280580.

[download]
and i don't think it *should* be writing, because it's (supposedly) opened read-only. any insight?

In reply to Re^2: processing huge files by geektron
in thread processing huge files by geektron

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.