Not an answer, but some advice...

First, always put use strict; and use warnings; at the top of every script you write. These pragmas catch the vast majority of common issues (typos, scoping problems etc), and all fatal errors.

Second, always use the three argument form of open, use lexical file handles as opposed to bareword ones, and throw an error if there are issues opening the file(s):

open my $fh1, '<', 'file1.txt' or die "can't open the damned 'file1.tx
+t' file!: $!";
open my $fh2, '<', 'file2.txt' or die "can't open the bloody 'file2.tx
+t' file!: $!";

[download]

Lastly, although it's valid and often reasonable to slurp in an entire file into an array, it's much more common and far less memory intensive if you iterate over the file handle. Instead of this:

my @file = <$fh>;

foreach $row (@file){
    ...

[download]

Do:

while (my $row = <$fh>){
    chomp $row; # remove line ending
    ...

[download]

In reply to Re: Extract length sum from columns and print pattern into another file by stevieb
in thread Extract length sum from columns and print pattern into another file by rebkirl

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.