perl -i.bak -ne 'print unless eof' file1 file2 ...
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For large files see: Delete the last line of a file.

--
John.

#!/usr/bin/perl -w

use strict;
use Tie::File;

my $filename = 'file.txt';
tie my @data, 'Tie::File', $filename
    or die "couldn't tie(): $!";
pop @data;
untie @data;
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hope this helps,

Tie::File seems to be rather slow on large files. I tried the Tie::File and (open file, read in all lines, pop, write back) variants on a ~5M file, and the second was about 10 times faster.

my $stuff = 'file.txt';
open(F, "$stuff") || die "Can not open file: $!\n";
my @records = (<F>);
print "@records\n";
s/lastlineofdata//;  #This is the part I am struggling with
close(F);
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Some notes:

• Each line is in one element of the array.
• You want to delete the last line.

Sounds like you want to delete the last line of the array.

Now, just because you do that, you aren't actually affecting the file. You would have to write back to the file what the file should now look like.

use strict;
use warnings;

use IO::File;

my $filename = 'file.txt';

my $in_fh = IO::File->new($filename)
    || die "Can not open '$filename' for reading: $!\n";
my @records = <$in_fh>;
$in_fh->close;

print "@records\n";
pop @records;

my $out_fh = IO::File->new(">$filename")
    || die "Cannot open '$filename' for writing: $!\n";

print $out_fh, @records;

$out_fh->close;
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perl -pi -e 'last if eof()' file.txt
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------
We are the carpenters and bricklayers of the Information Age.

The idea is a little like C++ templates, except not quite so brain-meltingly complicated. -- TheDamian, Exegesis 6

Please remember that I'm crufty and crochety. All opinions are purely mine and all code is untested, unless otherwise specified.

Pretty easy solution actually. Check out the following:

#!/usr/bin/perl -w
use strict;
 
my @lines=<DATA>;
pop @lines;
 
open(FOUT,"> myout.txt") or die $!;
print FOUT @lines;
close FOUT;
 
 
__END__
line 1
line 2
line 3
line 4
line 5
line 6
line 7
line 8
line 9
line 10
line 11
line 12
line 13
line 14
line 15
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Here is the output:

--$  cat myout.txt
line 1
line 2
line 3
line 4
line 5
line 6
line 7
line 8
line 9
line 10
line 11
line 12
line 13
line 14
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