Hi all

I have a text file that I want to extract some information from, however the file is too large to read all at once. So at the moment I'm trying to read in 3000 lines at a time, processing and extracting info, printing it, clearing memory and then go on to the next 3000 lines.

This is the code I am currently trying out:

my @array;
my $counter = 0;

while (<Input>)
{
 my $line = $_;
 chomp $line;
 push (@array, $line)
 if ($counter = 3000)
 {
   my @information;
   foreach my $element (@array)
   {
     #extract info from $element and push into @information
   }
   for my $x (@information)
   {
     print Output "$x\n";
   }
   $counter = 0;
   @information = ();
 }
}

[download]

However when I try this the output file just never stops growing, so I think I might be creating a endless loop somewhere. Any ideas/pointers?

Thanks in advance for any help

In reply to Processing large files by Dr Manhattan

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.