Hi,

I have experienced some strange behaviour with Tie::File.
The following code ties to the file, adds some elements, then sorts them and unties. After that, a newline is added to the file. Those newlines add up and clutter the file.

#!/usr/bin/perl

use strict;
use warnings;

use Tie::File;
tie my @tied_array, 'Tie::File', 'tiefile'  or die "Could not tie to t
+iefile: $!";

push(@tied_array, $_) for (1..3);

print "\@tied_array has " . scalar @tied_array . " elements before sor
+ting\n";
@tied_array = sort {uc($a) cmp uc($b)} @tied_array;
print "\@tied_array has " . scalar @tied_array . " elements after sort
+ing\n";
untie @tied_array;

[download]
prints: 
~/dev/perl$ perl test_tie_file.pl
@tied_array has 3 elements before sorting
@tied_array has 4 elements after sorting
~/dev/perl$ perl test_tie_file.pl
@tied_array has 7 elements before sorting
@tied_array has 8 elements after sorting
~/dev/perl$ perl test_tie_file.pl
@tied_array has 11 elements before sorting
@tied_array has 12 elements after sorting
~/dev/perl$ cat tiefile


1
1
1
2
2
2
3
3
3

~/dev/perl$

[download]

Sure, I could get rid of those lines easily*, but I find it strange that they are added in the first place. Can anyone shed some light on this?

Regards,
svenXY

* Update: @existing_packages = grep {!/^$/} @existing_packages; does the trick

In reply to Tie::File - sorting array adds empty lines by svenXY

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