Consider:

use strict;
use warnings;

my @insert1 =  qw(1 1 1);
my @insert2 =  qw(2 2 2);
my @inserts = (\@insert1, \@insert2);

my $outfile = 'delme.txt';
my $ins = 0;

open OUTFILE, '>', $outfile;
print OUTFILE <<DATA;
first second third
1 2 3
x y z
DATA
close OUTFILE;

for (@inserts) {
    insert (@$_);
    local @ARGV = $outfile;
    local $/ = undef;
    print <>;
}

...

[download]

Prints:

insert called:0
first    second    third    1    
1    2    3    1    
x    y    z    1    
insert called:1
first    second    third    1    2    
1    2    3    1    2    
x    y    z    1    2

[download]

Note that the bogus result from your reworking of my code was due to $/ being set to undef and therefore the <FILE2> seeing the entire file as one line on the second iteration. Sometimes I include "interesting" ways of doing stuff to make you explore the language and the documentation a little. In this case read perlvar to gain a little insight. ;)

DWIM is Perl's answer to Gödel

In reply to Re^3: weird file write problem by GrandFather
in thread weird file write problem by monkeyking

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.